Maine Research: Projects, Research Publications, Presentations, Thesis and Dissertations, Technical Publications

Maine Research Activities

Over the past eight decades the Maine Unit has worked on a variety of issues of importance to Maine and the region. Studies have examined the ecology and management of migratory game birds, biology and conservation of Atlantic salmon and other fishes, effects of forestry practices on forest carnivores, wetland and aquatic species conservation, relationships of pollinators and landscapes, and land conservation planning. Results of the Unit's research are regularly reported in an annually published unit report (see the Documents page for digital copies of past reports), seminars, workshops, and informal meetings, as well as in technical and scientific publications.

Projects

Project	Completion Date
Small mammal community stability	May 2016	The small mammal community is an integral part of Maine’s forest ecosystems, yet we know very little about the community’s overall ecological stability. Declines in common and abundant species can have dramatic effects on ecosystem function. Given a rapidly changing climate and increasing human demands of the land, it is important to understand how these systems will respond to stress. We will survey the small mammal community and the environments in which they are found along elevational gradients representing different climates in the mountains of Maine to answer the following questions. Are small mammal communities ecologically resilient to environmental change? Is the small mammal community uniform across ecological space? If community changes occur, are they likely to be gradual, or abrupt? We will also focus on high-elevation species facing particularly high ecological stress: the Northern Bog Lemming (Synaptomys borealis) and the Yellow-Nosed Vole (Microtus chrotorrhinus). Climate change is recognized as a persistent long-term threat to high-elevation species, and in Maine wind-energy development on ridgelines and mountaintops poses an acute and urgent threat to those species. Findings from this study will help inform the Maine Department of Inland Fisheries and Wildlife and land managers in Maine of the stability of the small mammal community and the potential impacts of environmental change on key components of the larger ecosystem.	None
Evalaute the influence of female den type and age of primiparity on black bear population recruitment	May 2015	The Maine Department of Inland Fisheries and Wildlife (IFW) has been conducting a black bear (Ursus americanus) monitoring program for the past 39 years in order to manage the population effectively, primarily through hunting regulations. Female black bears require a den to give birth and protect their offspring during early development, and these dens provide both thermal and security cover. Maine black bears utilize a variety of den types, each providing a different degree of protection. Tree dens are the most protective den type, while ground nests are the least protective. Currently, it is not well understood whether there is a relationship between the level of den type protection and recruitment rates. The age of primiparity is defined as the age at which a female first reproduces. In Maine, first litters historically had lower cub survival rates than subsequent litters. The size and condition of black bears are closely linked to their diet, specifically the amount of high fat and high carbohydrate foods consumed. The size and condition of adult female black bears can influence their reproductive performance and determine their age of primiparity. As a result of this connection, variation in the age of primiparity is likely linked to the availability of food resources. However, we do not know how age of primiparity affects individual lifetime reproductive performance, and therefore, population recruitment. The objectives of this study are to: (1) examine den type use to determine if den type affects Maine black bear recruitment, and (2) examine the regional variation in age of primiparity of Maine black bears to determine how the age of primiparity affects recruitment.	None
Commercial harvest influence on white sucker demographics	August 2016	The State of Maine issues an unlimited number of commercial permits to harvest white sucker in Maine’s inland waters. The fishery provides a necessary source of lobster bait to coastal communities at a time when other bait sources are scarce. The impact of the increasing number of permits and subsequent numbers of fishermen on the white sucker population is unknown. The Maine Department on Inland Fisheries and Wildlife (MDIFW) has closed a number of waters due to concerns that overfishing and/or incidental catch of other fish species may occur. The goal of this project is to determine the impacts of commercial fishing on white sucker populations and review the existing management structure to optimize the population size and commercial white sucker harvest in waters that are open. This information will allow the MDIFW to determine which waters that are currently closed can be reopened to harvest. Before additional waters can reopen, the department needs to determine the effect of the current commercial fishery on existing populations of white sucker. Specific biological data (age, length, sex, fecundity), catch/harvest information, assessment of existing data, needs to occur to determine which areas are overfished from those area that are not overfished. Currently, harvesters are not required to report the number or weight of the fish they harvest. This information is critical to manage a growing fishery that an increasing number of commercial fishermen are relying on to supply lobster bait and household income.	None
Understanding the St Croix River Food Web	January 2018	In the past several hundred years, the St. Croix River has experienced considerable fluctuations in management and in ecology. The construction of dams, fluctuating impoundment water levels, increased water temperature, restriction of upstream and downstream passage, conversion of riverine to lake habitat, introduction of nonindigenous species and industrial pollution represent a causal suite of impacts that have shifted the structure and function of the system. Understanding how these nutrients are assimilated is crucial to understanding the movement of nutrients and the trophic interactions within of lake systems with migratory species. This research will provide a critical assessment of the status of the ecosystem by a) providing a synthesis of species specific passage and habitat requirements and system limitations in the drainage and, b) model the food web to document conditions in the watershed including the seasonal dynamics of water quality. Project objectives are to: [1] Concurrent with river herring reintroduction actions, provide a synthesis of life cycle, passage and habitat requirements of all sea‐run and riverine migratory fish species native to the St. Croix River. [2] Model the food web to better understand conditions in the watershed including the seasonal dynamics of water quality	This research will provide a critical assessment of the status of the ecosystem by a) providing a synthesis of species specific passage and habitat requirements and system limitations in the drainage and, b) model the food web to document conditions in the watershed including the seasonal dynamics of water quality.
The Gulf of Maine coastal ecosystem survey: an integrated, multidisciplinary effort to map biological hotspots in the waters of Maine, New Hampshire, and Massachusetts (Collaborators: C. Loftin, S. McKinney, A. McKnight, A. Allyn, J. Runge, MDIFW, UMass, USFWS, BRI)	December 2018	The Gulf of Maine (GoM) coastal marine ecosystem is one of the most ecologically and economically productive ecosystems in the world.This coastal marine ecosystem currently faces threats on multiple levels, including climate change, wind energy development, and numerous competing uses of the system's natural resources. This study will collect data needed to inform these immediate management needs and increase our understanding of the GoM coastal marine ecosystem. We will conduct a multidisciplinary GoM coastal marine ecosystem survey, combined with focal research on life history parameters of target species, to acquire detailed measurements of the physical characteristics of the system and the distribution and abundance of organisms across all trophic levels. We will use these data to build habitat use models for SGCN in the coastal zone and calculate overall biological hotspot index values for locations throughout the coastal zone. This information will support spatial planning efforts and on-the-ground habitat management by delineating ecologically important areas. Detailed and repeatable measures of physical and biological factors within the coastal zone will also provide critical baseline data for monitoring and evaluating future changes to the region archived in open-source existing databases, to be used in long-term monitoring as well as for evaluating the effects of future changes.	The Gulf of Maine (GoM) coastal marine ecosystem is one of the most ecologically and economically productive ecosystems in the world.This coastal marine ecosystem currently faces threats on multiple levels, including climate change, wind energy development, and numerous competing uses of the system's natural resources. This study is collecting data needed to inform these immediate management needs and increase our understanding of the GoM coastal marine ecosystem. We will conduct a multidisciplinary GoM coastal marine ecosystem survey, combined with focal research on life history parameters of target species, to acquire detailed measurements of the physical characteristics of the system and the distribution and abundance of organisms across all trophic levels. We will use these data to build habitat use models for SGCN in the coastal zone and calculate overall biological hotspot index values for locations throughout the coastal zone. The project is a collaboration of the US Geological Survey Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Maine Department of Inland Fisheries and Wildlife, the Biodiversity Research Institute, and the Gulf of Maine Research Institute. This information gathered and developed in the project will support spatial planning efforts and on-the-ground habitat management by delineating ecologically important areas. Detailed and repeatable measures of physical and biological factors within the coastal zone will also provide critical baseline data for monitoring and evaluating future changes to the region archived in open-source existing databases, to be used in long-term monitoring as well as for evaluating the effects of future changes.
Small and meso mammals and forest community dynamics	June 2016	Small and meso mammals are key components in forest communities. This study will address how habitat context (structure, tree species composition, and seed-energy production) shapes the strength of interaction within and among the mammal community, and further, how the mammal community acts to affect forest ecological processes.	None
American marten population ecology and role in forest community dynamics	June 2018	American marten (Martes americana) are an important furbearer to trappers in Maine and also provide value to hikers, skiers, and wildlife watchers. In addition, marten play key ecological roles as efficient predators of small mammals and as prey to larger carnivores. Marten require a component of mature forest and horizontal structure, features that are predicted to be limited on the Maine landscape in the future. In Maine marten are one of only two furbearer species that the state limits the harvest. Current population monitoring is predicated on the analysis of fur tagging records, a method thwart with uncertainty. Therefore, it is currently unknown how well harvest data track actual marten population dynamics. Given that climate change and land use practices are both predicted to deleteriously affect the amount of suitable marten habitat, and the importance of marten to Maine, a more accurate and robust monitoring program is needed. This project will test various sampling designs and methodologies to arrive at the best, unbiased predictor of population size and trend through time. Additionally, this project will interact with others in our research group to address broader concepts linking population processes to community-level dynamics.	None
Black bear population modeling	April 2015	This project uses multiple long-term (30+ years) data sets from radio-telemetry of female bears, mark-recapture of female and male bears, den-site visits, and harvest data to estimate demographic parameters and population change rates; to predict population trajectories; to evaluate the effectiveness of the Maine Department of Inland Fisheries and Wildlife’s current bear monitoring program and population estimates; and to determine whether alternative research and monitoring methods are appropriate.	None
Modeling migration of silver eels to forecast critical intervals of risk at hydrofacilities	July 2014	We propose to synthesize the available information on downstream migration into a modeling framework that can be used to predict migration of silver eels, using the Penobscot River as a model system. A predictive modeling framework will be adopted using a Bayesian forecasting approach . Bayesian forecasting has proven to be an effective way to use available information and summarize the probability of future scenarios. As such, they have become an important tool in ecological management. In addition, Bayesian forecasting models are adaptable such that they can be updated as new information becomes available.	None
Trans-boundary management and conservation: linking large-scale dynamics to ecological monitoring and management	September 2014	A central challenge to natural resource management is to understand and predict ecological responses to management and environmental change over large spatial scales. It is recognized, however, that the management and conservation of many important ecological systems and the services they provide must be addressed at spatial scales that transcend jurisdictional and political boundaries. For example Landscape Conservation Cooperatives (LCCs) recognize that managing natural resources is complex and requires landscape-scale (i.e., trans-boundary) approaches. Although trans-boundary approaches are necessary to understand large-scale phenomenon (e.g., species range), it remains unclear in many cases how best to address the inherent complexities in managing ecosystems at large (e.g., regional) spatial scales. In addition to challenges associated with performing trans-boundary research, it is often unclear how to link large-scale system dynamics with on-the-ground decision-making processes, which are often done using adaptive management principles. For example, a critical component for successfully implementing adaptive management is the development of a rigorous monitoring program, which provides a critical feedback loop for learning about system dynamics. It is unclear, however, how the interplay between components acting at different, hierarchical scales will affect the ability of natural resource managers to detect changes in important state variables (e.g., animal abundance, occupancy, etc.) at trans-boundary spatial scales. Thus, our overarching objective is to use freshwater stream fish populations as model systems to develop a framework and tools for addressing the inherent challenges in performing trans-boundary research and for linking large-scale dynamics to ecological monitoring and management.	None
Interactions between invasive smallmouth bass and stream salmonines	January 2012	The ecological interactions of the invasive smallmouth bass and salmonines (brook trout and Atlantic salmon) are being characterized both in th laboratory and in the field	None
Striped bass movements in the Penobscot River Maine.	January 2012	Acoustic telemetry is being used in the Penobscot River to understand the migratory patterns of striped bass	None
Life history variation in brook trout	January 2015	This work is aimed at understanding the complexties of growth and life history "choice" in the context of managing for a fishery.	None
Sea lamprey biology and interaction with Atlantic salmon in Maine rivers	January 2017	Sea lamprey are one of the most abundant Anadromous fishes returning to the Penobscot River. The influence of sea lamprey on habitat (through nest building) and productivity (through deposition of carcasses) is being assessed.	None
Regional effects of acid and aluminum exposure on Atlantic salmon juvenile development	January 2016	The impact of acid aluminum exposure is being characterized to determine the role of acid rain in Atlantic salmon declines.	None
Penobscot River American shad; status and recovery	October 2013	Recovery of American shad in the Penobscot River is being informed by population estimates based upon DIDSON imaging technology.	None
Salinity tolerance and the physiology of seawater entry in downstream migrating Atlantic salmon smolts	January 2016	The transition from fresh water to seawater is a critical developmental stage called "smolting". Understanding the physiological and behavioral mechanisms is a central to this project.	None
Dam removals in Sedgeunkedunk Stream and the Penobscot River– changes in resident and migratory communities	January 2017	Dam removals in the Penobscot River watershed are central to efforts to restore community systems. This project is geared at characterizing the effects of dam removal over time.	This project is geared at characterizing the effects of dam removal in a small tributary of the Penobscot River over time.
Passage of adult Atlantic salmon in the Penobscot River before and after dam removal	January 2022	The Penobscot River has experienced two main-stem dam removals and other engineering changes, including the installation of a fish lift at Milford Dam (the lowest dam in the system) with hopes of restoring Atlantic salmon. Efforts to restore these federally endangered fish will rely on safe and effective fish passage. We sought to use acoustic, radio telemetry and PIT tag technology are being used to characterize migration patterns and passage efficiency of adult Atlantic salmon. This work in the Penobscot River, Maine, necessitating effective collaboration with USFWS, NOAA, Penobsot Nation, Maine Department of Marine Resources, Brookfield Power, TNC and the Penobscot River Restoration Trust. Characterizing migration patterns and passage efficiency in the Penobscot River, Maine can inform restoration strategies into the future.	The Penobscot River has experienced two main-stem dam removals and other engineering changes, including the installation of a fish lift at Milford Dam (the lowest dam in the system) with hopes of restoring Atlantic salmon. Efforts to restore these federally endangered fish will rely on safe and effective fish passage. We sought to use acoustic, radio telemetry and PIT tag technology are being used to characterize migration patterns and passage efficiency of adult Atlantic salmon. This work in the Penobscot River, Maine, necessitating effective collaboration with USFWS, NOAA, Penobsot Nation, Maine Department of Marine Resources, Brookfield Power, TNC and the Penobscot River Restoration Trust. Characterizing migration patterns and passage efficiency in the Penobscot River, Maine can inform restoration strategies into the future.
Using dendrochronology and stable isotopes to document the presence of marine derived nutrients deposited historically in the Penobscot River Basin. Collaborators:J.Zydlewski, G. Zydlewski (UMaine), R. Cunjak (UNew Brunswick), C. Fay (Penobscot Indian Nation)	December 2006	Characterizing the role of marine derived nutrients in the Penobscot River has important implications for management of the watershed. This is a topic central to discussions concerning the planned removal of two main-stem dams. The ecological role of historically prominent migratory species is controversial in both scientific and political arenas because of the paucity of historical data. This pilot study may improve our understanding of this system’s basic ecology. The ratios of naturally-occurring levels of carbon (13C and 12C) and nitrogen (15N and 14N) isotopes in biota are influenced by a number of factors including trophic level and environment. Marine systems generally have greater proportions of heavier isotopes (Craig 1953; Peters et al.1978; Owens 1987). These “signatures” are also observed in anadromous fish that migrate between marine and fresh water environments (Bunn et al. 1989; Doucett et al. 1999a; 1999b; McCarthy and Waldron 2000). Anadromous fish runs can deliver considerable marine-derived biomass to the food webs of fresh water systems, leaving detectable “marine signatures” in the ecosystem, including the plant community (Helfield and Naiman, 2001). Importantly, trees can chronicle fluctuations in this signature by the growth of annual rings. Considerable runs of anadromous fish (e.g., American shad, alewife, sea lamprey and Atlantic salmon) occurred in the Penobscot River prior to the construction of main stem dams in the early 1800’s and declined precipitously afterwards. There is uncertainty, however, over specific characterizations of this occurrence, as much of the evidence is anecdotal. Long lived trees offer a tremendous opportunity to chronicle marine derived nutrient contributions to fresh water ecosystem in the Penobscot River watershed. Those few large trees whose growth has spanned periods previous to and subsequent to dam construction may carry quantifiable signatures of marine derived nutrients through a historic time series. These data may also help in interpreting the spatial extent of this contribution throughout the Penobscot River drainage. Objectives and Approach Objective 1: Identify areas in the Penobscot drainage with old growth trees that would have been exposed to marine derived nutrients prior to mainstem dam construction (early 1800’s). Objective 2: Obtain dendrochronological cores from old, riparian trees. Objective 3: Measure ratios of marine to freshwater-derived carbon and nitrogen isotopes in annual growth rings corresponding to before and after construction of main stem dams in the Penobscot River.	None
Atlantic salmon adult passage	December 2027	The Piscataquis River is a major tributary to the Penobscot River with the potential to produce over 70,000 Atlantic Salmon smolts. With the completion of habitat accessibility improvements in the lower Penobscot (i.e. removal of Great Works and Veazie Dams by the Penobscot River Restoration Trust (PRRT) in 2012 and 2013), there is an important opportunity to ensuring safe, timely and effective access to the large amount of quality habitat in the upper Piscataquis River basin. There is an urgent need for targeted assessment of the movements and habitat uses of adult Atlantic Salmon and other species; the timing is critical because of targeted smolt stocking completed in 2022 and 2023 that potentially provides a source for “known origin” returning adults in 2024 and 2025 (for 2 SW adults) with homing motivation above all mainstem dams in the Piscataquis River. This work is highly collaborative with the Penobscot RIver Restoration Trust, The Nature Conservancy and the NOAA National Marine Fisheries Service. In addition we will collaborate with industrial partners Brookfield Power and Kruger Industries to operate on hydropower dam facilities. This study aims to tag adult Atlantic Salmon returning to the Milford Fish Lift in spring 2024 and 2025 to evaluate upstream passage for Atlantic Salmon at the Howland and Browns Mills Dams. The study will also use acoustic telemetry to document use of cool water refugia and tributaries in the Piscataquis River. Telemetry data will be examined to assess passage effectiveness and delays at the Howland and Browns Mills Project. Timing of detections at receivers near the confluence of the Piscataquis/Penobscot Rivers will be used to calculate average delays of approaching fish, as well as overall migration times.	None
Building international capacity for thermal mapping of rivers in a changing climate	July 2028	Cold water refuge habitats are critical for ensuring the persistence of and conferring resiliency to Atlantic salmon <i>(Salmo salar)</i>, Eastern Brook Trout<i> (Salvelinus fontinalis)</i>, and other cold-water fishes in a changing climate. This project is a four-year endeavor to collaborate across nations to gain capacity, provide on the ground proof of concept, and support ongoing recovery of salmonid species. Our focus will be on the inclusion of international and indigenous partners through workshop participation, co-development of applied research, and active recruitment of international collaborators, a PhD student, and a post-doctoral associate.	None
Optimizing Sampling of PFAS in Maine Fishes by Improving our Understanding of Variability	December 2027	PFAS compounds are of increasing human health and environmental concern. Ensuring efficient and representative sampling will be important to evaluating PFAS risk in Maine. Variability exists in current fish collection methods, sample sizes, species, and waterbodies sampled within and outside of Maine. Age, sex, size, metabolic rate, and other characteristics may influence PFAS accumulation for individual fish. The PFAS compounds in water responsible for accumulation in fish may also change seasonality with variability in hydrological conditions. This project aims to tackle questions on how this variability, variability within a species and variability across species impacts assimilation and sample results in Maine fishes.	None
MDIFW Lake Whitefish	August 2027	Lake Whitefish populations have suffered significant declines over the past 50+ years across the southern extent of their range. This project aims to develop a method for assessing Lake Whitefish recruitment through the use of light trapping as a safer, passive, and cost-effective method for documenting Lake Whitefish recruitment while also assessing the present zooplankton assemblages.	None
MDIFW Arctic Charr	August 2029	Arctic charr in Maine are a unique resource including the only intact native populations in the lower forty-eight states. Using acoustic telemetry, this project is focused on identifying Arctic Charr spawning locations and seasonal habitat use in collaboration with the Maine Department of Inland Fisheries and Wildlife.	None
Ecosystem responses to the interacting forces of bridge improvements and beavers	August 2027	The PIN Department of Natural Resources (DNR) plans to conduct two major bridge improvements on the Birch Stream Road. These bridges will be replaced with larger, structures to improve fish passage and capacity to handle high flow events in the face of climate change This work is anticipated to increase the resiliency of this important road network for Tribal members and Tribal forestry operations. This road runs through a large area of impounded beaver habitat thought to be important for the ecosystem. Many species of diadromous and resident fish currently inhabit and are indigenous to Birch Stream including brook trout and Endangered Atlantic salmon. This project aims to contribute to evaluations of how the improvements of these bridges will affect the habitat in this wetland complex.	None
Lamprey recolonization of the Penobscot River.	December 2024	To assess the migratory patterns of lamprey in the Penobscot, we propose a radio telemetry assessment around Milford Dam, the first major impoundment on the Penobscot River. This builds on the work carried out in 2020 and 2021 to assess passage at the first main-stem dam in the system. We intend to use Lotek MST-820-T radio tags to determine movement patterns (e.g., rate of passage, duration of delays, etc.) of fish that have passed Milford Dam. These tags are similar in size to those used in other lamprey studies on the Penobscot.	To assess the migratory patterns of lamprey in the Penobscot, we propose a radio telemetry assessment around Milford Dam, the first major impoundment on the Penobscot River.
Alewife passage in the St Croix River.	December 2023	The St. Croix River herring populations are at a critical stage in their recovery. Tracking and recording this growth and the accompanying biological changes in the fish population are urgent priorities for the scientists and managers who need this information to develop a long-term fisheries management plan and be able to evaluate the effects of river herring recovery on the health of the watershed ecosystem.<br>Planned project work in will address this data gap in fish passage using radio telemetry to assess fish locations and routes moving both upstream and downstream. Current planned assessments with partners will meet identified needs in the IWI funded “Exploring Upstream and Downstream Fish Passage Improvements on the Lower St. Croix River” to help further fisheries restoration resources in the St. Croix River.	The St. Croix River herring populations are at a critical stage in their recovery. Tracking and recording this growth and the accompanying biological changes in the fish population are urgent priorities for the scientists and managers who need this information to develop a long-term fisheries management plan and be able to evaluate the effects of river herring recovery on the health of the watershed ecosystem.
Understanding Atlantic salmon kelt behavior and survival	December 2024	Repeat spawners are a biologically important part of an intact Atlantic salmon population, and these fish are almost completely missing in the Gulf of Maine DPS. The migration process of adult Atlantic salmon is energetically costly, so successful reproduction and survival is normally limited. Access to spawning habitat and post-spawn survival are further hampered by ineffective upstream and downstream passage at dams. Post-spawn behavior and passage success in the Gulf of Maine are poorly characterized and represent critical deficits for informed management. We intend to collaborate with the University of Maine to support a graduate student through the Department of Wildlife, Fisheries, and Conservation Biology to study survival and passage of these post spawn adults. The work would leverage significant telemetry infrastructure and experience already dedicated to river studies in the region. Products will include a master’s thesis as well as a peer reviewed publication that will address several key recovery actions identified in the final recovery plan thereby informing recovery actions.	Repeat spawners are a biologically important part of an intact Atlantic salmon population, and these fish are almost completely missing in the Gulf of Maine DPS. The migration process of adult Atlantic salmon is energetically costly, so successful reproduction and survival is normally limited.
Wild Turkey Population and Harvest Management in Maine.	December 2026	Our proposed project will build upon previous turkey population assessments by MDIFW and the University of Maine (Gonnerman et al. 2021). Specifically, we will address issues of 1) quantifying and accounting for the inherent uncertainty in both future wild turkey data collection and the processes used to model these data, and 2) the need to make harvest management decisions while addressing competing stakeholder interests, given the presence of inherent uncertainties.	Quantify uncertainty in turkey abundance estimates originating from data collection using a simulation approach, and identify the most efficient sampling framework moving forward for robust population inference.
Beyond Recovery: Enhancing Agency Preparedness for Ecological and Societal Challenges with Increasing Protected Species Populations.	December 2025	Marine mammal populations have begun to recover after centuries of human caused declines. The Endangered Species (ESA) and Marine Mammal Protection Acts (MMPA) have been instrumental to shepherding the rebound in many populations. In some cases, this biological management success has led to unforeseen increases in human-wildlife conflicts. Many solutions seem to be incongruent with the apparent constraints imposed by these tools. Managers, therefore, are moved to engage stakeholders and problems solve conflicts. We propose to assess the range of marine mammal conflicts encountered by the five National Marine Fisheries Service (NMFS) regions of the United States. This information will inform active facilitated discussions with managers and stakeholders to develop solutions for addressing these clashes.	Marine mammal populations have begun to recover after centuries of human caused declines. The Endangered Species (ESA) and Marine Mammal Protection Acts (MMPA) have been instrumental to shepherding the rebound in many populations. In some cases, this biological management success has led to unforeseen increases in human-wildlife conflicts.
Range wide, river-specific dam impacts on Blueback Herring, Alewife and American Eel.	December 2025	We propose to develop and parameterize Alewife, Blueback Herring and American Eel river-specific models across their entire ranges. These models will be populated with estimates of region-specific life-history parameters, estimates of habitat (e.g., acres) and the dam landscape. Once developed, these models will be freely available to hydro practitioners for the use in planning for species conservation and recovery relative to hydropower at both local and regional scales. The challenges for developing the habitat and population model components vary greatly among these three species. <br><br>Alewife and blueback herring (collectively “river herring”) range from South Carolina to Newfoundland . These two species are anadromous – growing in the marine environment and returning to fresh water as presumptive spawners (alewife returning first in the spring, blueback herring timing overlaps, but is later). The two species are similar in appearance and life history, but critical distinctions (from each other and from American shad) prevent a direct reapplication of the GIS work used to model American shad. Blueback herring do not usually swim far upstream to spawn (historic runs in the Connecticut River not withstanding). Blueback Herring prefer to spawn in fast currents or over hard substrate .<br><br>In contrast, adult alewife prefer to spawn in slow moving water such as lakes or flowages. In the northern part of their range, they are iteroparous, meaning that adults return to the ocean after spawning. Both species’ juveniles spend 2-7 months in freshwater, and at 23-100 mm total length they migrate to the ocean. As anadromous species, blueback herring and alewife spawning is contained in isolated freshwater systems. These species are, therefore, amenable to river specific population modeling.<br><br>A similar approach with the catadromous American Eel represents a fundamental challenge as the growth phase of this species is in fresh water, and spawning occurs in the ocean. The population is believed to be panmictic, a single population across the entire range of the species. After beginning life in the Sargasso Sea, American Eel larvae are dispersed by ocean currents across the eastern coast of North America . They eventually transition to a translucent “glass” stage near coastal waters and begin actively swimming upriver, when many encounter dams in pursuit of freshwater lakes, rivers, and streams. Because these barriers delay movement and limit American Eel establishment in headwater reaches , many dam structures have been retrofitted with juvenile eel ladders to offer upstream passage opportunities . Once in fresh water, eels may reside in these systems for more than 20 years before beginning a transoceanic spawning migration to return to the Sargasso Sea, during which they must pass the same dams they ascended as juveniles. These fish represent a challenge in the variety of habitats they can inhabit during their growth phase, as well as the integrated nature of range-wide river contributions to a single population.	We propose to develop and parameterize Alewife, Blueback Herring and American Eel river-specific models across their entire ranges. These models will be populated with estimates of region-specific life-history parameters, estimates of habitat (e.g., acres) and the dam landscape. Once developed, these models will be freely available to hydro practitioners for the use in planning for species conservation and recovery relative to hydropower at both local and regional scales.
Understanding the perceptions and potential of aquaculture as a tool for Atlantic salmon restoration in Maine.	December 2025	The Gulf of Maine Distinct Population Segment (DPS) of Atlantic Salmon is federally endangered and the current conservation program relies primarily on juvenile stocking to maintain broodstock. Despite decades of hatchery supplementation, extirpation remains a threat and natural reproduction is extremely limited. The Collaborative Management Strategy (CMS), the governance structure for Atlantic salmon management in Maine, is collaborating with Cooke Aquaculture to implement a novel rearing program to increase natural spawning. Native smolts will be transferred to coastal net pens and reared to maturation. Pre-spawn adults will then be released into high-quality spawning habitats. This effort is a major shift in management and has garnered mixed public reactions. Working with the CMS and other stakeholders, a questionnaire was administered to 900 households in Downeast, Maine via Drop-off and Pick-up methodology. Through this exploratory study of attitudes, beliefs, knowledge, and agency trust we found positive attitudes toward Atlantic salmon, endangered species conservation, and conservation aquaculture. Attitudes toward commercial aquaculture and hatcheries were neutral to weakly positive. Participants reported low trust in the collaborating agencies and industry partners with regard to providing relevant information to the protection human and environmental safety. We compared the beliefs of residents who are geographically closest to the proposed net pen site and those in surrounding communities to disentangle issues of proximity to the project from other concerns. We found minimal evidence of local opposition, but there was also low public knowledge regarding Atlantic salmon in general. Coupled with high uncertainty in stakeholder values and generally neutral belief responses, the data suggest the community is uninformed and under engaged. As a result, the community may have a heightened susceptibility to influence, either from managers or special interest groups, that engage the community.	The Gulf of Maine Distinct Population Segment (DPS) of Atlantic Salmon is federally endangered and the current conservation program relies primarily on juvenile stocking to maintain broodstock. Working with the CMS and other stakeholders, a questionnaire was administered to 900 households in Downeast, Maine via Drop-off and Pick-up methodology. Through this exploratory study of attitudes, beliefs, knowledge, and agency trust we found positive attitudes toward Atlantic salmon, endangered species conservation, and conservation aquaculture.
BCG Model for Upper Tana Watershed Kenya	December 2026	Despite relatively wide adoption, developing and monitoring indices from commonly used aquatic macroinvertebrates, fish, and algae to assess watershed integrity may be expensive and time-consuming. The popularity and relative ease of birding, and the recent increases in community surveys associated with birds, suggest that they may provide a promising alternative. However, additional research is needed to assess the application of community survey data on birds to inform watershed bioassessments. This novel project seeks to explore the potential of using community bird surveys to assess watershed condition for a watershed in Kenya.	Despite relatively wide adoption, developing and monitoring indices from commonly used aquatic macroinvertebrates, fish, and algae to assess watershed integrity may be expensive and time-consuming. The popularity and relative ease of birding, and the recent increases in community surveys associated with birds, suggest that they may provide a promising alternative. However, additional research is needed to assess the application of community survey data on birds to inform watershed bioassessments. This novel project seeks to explore the potential of using community bird surveys to assess watershed condition for a watershed in Kenya.
Yellow Lampmussel Range-Wide Assessment and Conservation	April 2026	As with many freshwater mussels species, Yellow Lampmussel (YLM) monitoring, assessment, and conservation planning occurs primarily within states and provinces, with little interaction outside geographic boundaries. Informal comparisons across boundaries have revealed that YLM populations occur in a variety of habitats throughout its range. In some portions of their range they are found only in medium and large rivers; in others, they more commonly occur in lakes and ponds. YLM has been described as inhabiting a variety of substrates and flow conditions, with some studies suggesting a preference for riffles and strong currents and others locating YLM in slow currents around sandbars. The presence of YLM in varied habitat types across its range suggests that populations may be impacted by different stressors and different approaches may be needed for conservation. Although recent YLM surveys are limited and not standardized, making it difficult to assess range-wide status, a comprehensive assessment is critical for understanding species’ habitat and vulnerabilities and facilitating coordinated and resource-efficient conservation and restoration efforts. One of the primary goals of this project is to assess landscape-scale threats and identify potential restoration sites for YLM across its range using multi-species distribution modelling.	As with many freshwater mussels species, Yellow Lampmussel (YLM) monitoring, assessment, and conservation planning occurs primarily within states and provinces, with little interaction outside geographic boundaries. Informal comparisons across boundaries have revealed that YLM populations occur in a variety of habitats throughout its range. In some portions of their range they are found only in medium and large rivers; in others, they more commonly occur in lakes and ponds. YLM has been described as inhabiting a variety of substrates and flow conditions, with some studies suggesting a preference for riffles and strong currents and others locating YLM in slow currents around sandbars. The presence of YLM in varied habitat types across its range suggests that populations may be impacted by different stressors and different approaches may be needed for conservation. Although recent YLM surveys are limited and not standardized, making it difficult to assess range-wide status, a comprehensive assessment is critical for understanding species’ habitat and vulnerabilities and facilitating coordinated and resource-efficient conservation and restoration efforts. One of the primary goals of this project is to assess landscape-scale threats and identify potential restoration sites for YLM across its range using multi-species distribution modelling.
The role of marine derived nutrients delivered by anadromous fish in the restoration of freshwater ecosystems in the Penobscot River watershed, Maine	September 2012	The ecological role of prominent migratory fish species is a poorly characterized natural history in the Penobscot River and surrounding area. Manipulation of this River through habitat impact and impoundments has resulted in a greatly reduced exchange of nutrients between inland and marine sources. Nutrient exchange is of interest as restoration of anadromous fish runs may depend, in part, on a continuous cycle of nutrient import from the ocean. The proposed study will probe the role of marine derived nutrients (MDN) in the Penobscot River watershed by i) modeling the exchange of nutrients in salmon streams ii) explicitly testing how increased nutrients affect young Atlantic salmon and iii) characterizing historic MDN incorporation in watershed ecosystems. Objective 1. Model the exchange of nutrients in salmon streams Task 1: Compile data on the composition of migratory and non migratory fishes presently and historically found in salmon streams of Maine Task 2: Based on life history and proximate composition, generate a general model of the timing and extent of nutrient fluxes Task 3: Use composition and timing data to generate a biologically realistic schedule for the import of nutrients into small streams in Maine (for Objective 2) Objective 2. Explicitly test how increased nutrients affect young Atlantic salmon Task 1: Identify up to 8 streams (adjacent if possible) in the Penobscot drainage. Criteria will be based on history of migratory fish populations, habitat quality and size. Task 2: Define and characterize stream reaches and habitat collecting baseline water quality and species composition data; � Low level water chemistry (Total and available N, P; C:N ratio). � Stable isotope ratios of terrestrial and aquatic macroinvertebrates, instream algae, and fish. � Species assemblages and indicators of biomass for aquatic inverts (drift) algae (glass plates) and fish. Task 3: Initiate salmon stocking establish monitoring of salmon growth for young of the year. � All streams will be stocked with Atlantic salmon fry (equal numbers into control and treatment sites) � Establish stream control (upstream) and nutrient enhancement treatment (downstream) sections would be identified. � Assess juvenile salmon response (measured in growth/productivity responses as well as changes in tissue stable isotope ratios) to presence and absence of nutrient enhancement.	The ecological role of prominent migratory fish species is a poorly characterized natural history in the Penobscot River and surrounding area. Manipulation of this River through habitat impact and impoundments has resulted in a greatly reduced exchange of nutrients between inland and marine sources. Nutrient exchange is of interest as restoration of anadromous fish runs may depend, in part, on a continuous cycle of nutrient import from the ocean. The proposed study will probe the role of marine derived nutrients (MDN) in the Penobscot River watershed by i) modeling the exchange of nutrients in salmon streams ii) explicitly testing how increased nutrients affect young Atlantic salmon and iii) characterizing historic MDN incorporation in watershed ecosystems. Objective 1. Model the exchange of nutrients in salmon streams Task 1: Compile data on the composition of migratory and non migratory fishes presently and historically found in salmon streams of Maine Task 2: Based on life history and proximate composition, generate a general model of the timing and extent of nutrient fluxes Task 3: Use composition and timing data to generate a biologically realistic schedule for the import of nutrients into small streams in Maine (for Objective 2) Objective 2. Explicitly test how increased nutrients affect young Atlantic salmon Task 1: Identify up to 8 streams (adjacent if possible) in the Penobscot drainage. Criteria will be based on history of migratory fish populations, habitat quality and size. Task 2: Define and characterize stream reaches and habitat collecting baseline water quality and species composition data; � Low level water chemistry (Total and available N, P; C:N ratio). � Stable isotope ratios of terrestrial and aquatic macroinvertebrates, instream algae, and fish. � Species assemblages and indicators of biomass for aquatic inverts (drift) algae (glass plates) and fish. Task 3: Initiate salmon stocking establish monitoring of salmon growth for young of the year. � All streams will be stocked with Atlantic salmon fry (equal numbers into control and treatment sites) � Establish stream control (upstream) and nutrient enhancement treatment (downstream) sections would be identified. � Assess juvenile salmon response (measured in growth/productivity responses as well as changes in tissue stable isotope ratios) to presence and absence of nutrient enhancement.
Trophic phenotypes as eco-evolutionary mediators of resilience to climate change	July 2026	Many glacial relic populations of fishes and other taxa inhabitat small refuge habitats that are often isolated and thus presumed vulnerable to interacting abiotic and biotic factors that could compress their niche to the point of collapse. However, this outcome, and many future species range models, assume a relatively fixed species niche and do not factor in that glacial relics exhibit intraspecific trophic diversity, representing the capacity to exploit multiple alternative niches. We propose an organismal-eco-evolutionary framework for assessing the role of trophic trait diversity and change (via evolution or plasticity) in resilience to climate change, that links the genetic and plastic components of trophic trait variation, to population demography, and environmental context effects on eco-evolutionary potential. Landlocked Arctic charr in Maine, USA, are the most southern populations of this species in North America and present a powerful system to address these linkages by means of an exceptional long-term dataset of Arctic charr trait and mark-recapture data, combined with genomic analyses, movement behavior, diet and bioenergetics, food web structure analysis, limnology, and climate projection models.	Many glacial relic populations of fishes and other taxa inhabitat small refuge habitats that are often isolated and thus presumed vulnerable to interacting abiotic and biotic factors that could compress their niche to the point of collapse. However, this outcome, and many future species range models, assume a relatively fixed species niche and do not factor in that glacial relics exhibit intraspecific trophic diversity, representing the capacity to exploit multiple alternative niches. We propose an organismal-eco-evolutionary framework for assessing the role of trophic trait diversity and change (via evolution or plasticity) in resilience to climate change, that links the genetic and plastic components of trophic trait variation, to population demography, and environmental context effects on eco-evolutionary potential. Landlocked Arctic charr in Maine, USA, are the most southern populations of this species in North America and present a powerful system to address these linkages by means of an exceptional long-term dataset of Arctic charr trait and mark-recapture data, combined with genomic analyses, movement behavior, diet and bioenergetics, food web structure analysis, limnology, and climate projection models.
Wetland ecology of Northeastern lowland forests	December 2024	The Northern Forest is a working forest that provides benefits, including timber production, from a range of natural community types broadly classified as lowlands and uplands. Northern Forest lowlands, including forested swamps and seeps, contain regionally important commercial tree species such as northern white-cedar, balsam fir and red spruce. Though widely harvested, impacts of forestry operations on these ecosystems are poorly understood. Yet demand for products such as softwood pulp, studwood, and shingles from tree species common in seasonally wetted lowlands remains strong. The lack of baseline information and standardized methods for assessing these Northern Forest wetland habitats limits the ability of local and regional planners to guide forest management and evaluate outcomes. This gap in ecological understanding is of concern, as intermittent waters, including seasonally wetted forested swamps and seeps, are increasingly recognized for their important roles in supporting water quality, biodiversity, and as critical habitat for wildlife of conservation concern. These waters are likely to encounter increased regulation as the jurisdictional definition of “Waters of the United States” is revised. Our goal for this project is to inform understanding of the intermittent wetland habitats and processes associated with management of northeastern lowland forests, focusing on northern white-cedar forests. This includes quantifying ecological impacts in these systems and developing standardized measurement protocols. Our specific objectives are to: 1) compare wetland processes across harvesting treatments in northern white cedar forests, with particular focus on decomposition, and insect biomass, assemblages, and biodiversity within the wetted environment; 2) develop standard quantification methods for aquatic leaf litter processing, wood decomposition and insect biodiversity in seasonally wetted lowlands that can be applied throughout the Northern Forest; and 3) communicate about tradeoffs in wetland ecosystem condition and biodiversity associated with harvest regimes to forestry practitioners to aid lowland forest management planning. By developing our understanding of these ecosystems and how they respond to harvest, this study will inform sustainable management and prepare stakeholders for questions regarding ecological tradeoffs in management of intermittent waters throughout Northern Forest lowlands.	The Northern Forest is a working forest that provides benefits, including timber production, from a range of natural community types broadly classified as lowlands and uplands. Northern Forest lowlands, including forested swamps and seeps, contain regionally important commercial tree species such as northern white-cedar, balsam fir and red spruce. Though widely harvested, impacts of forestry operations on these ecosystems are poorly understood. Yet demand for products such as softwood pulp, studwood, and shingles from tree species common in seasonally wetted lowlands remains strong. The lack of baseline information and standardized methods for assessing these Northern Forest wetland habitats limits the ability of local and regional planners to guide forest management and evaluate outcomes. This gap in ecological understanding is of concern, as intermittent waters, including seasonally wetted forested swamps and seeps, are increasingly recognized for their important roles in supporting water quality, biodiversity, and as critical habitat for wildlife of conservation concern. These waters are likely to encounter increased regulation as the jurisdictional definition of “Waters of the United States” is revised. Our goal for this project is to inform understanding of the intermittent wetland habitats and processes associated with management of northeastern lowland forests, focusing on northern white-cedar forests. This includes quantifying ecological impacts in these systems and developing standardized measurement protocols. Our specific objectives are to: 1) compare wetland processes across harvesting treatments in northern white cedar forests, with particular focus on decomposition, and insect biomass, assemblages, and biodiversity within the wetted environment; 2) develop standard quantification methods for aquatic leaf litter processing, wood decomposition and insect biodiversity in seasonally wetted lowlands that can be applied throughout the Northern Forest; and 3) communicate about tradeoffs in wetland ecosystem condition and biodiversity associated with harvest regimes to forestry practitioners to aid lowland forest management planning. By developing our understanding of these ecosystems and how they respond to harvest, this study will inform sustainable management and prepare stakeholders for questions regarding ecological tradeoffs in management of intermittent waters throughout Northern Forest lowlands.
Effects of Alewife Reintroductions	December 2023	Efforts to restore Alewife populations on the Atlantic coast have increased in recent years. However, freshwater habitats, specifically lakes and ponds, have altered food web structures and dynamics reflecting the long period of anadromous Alewives’ absence. Restoration of anadromous populations may alter the lake and pond ecosystem dynamics, resulting in possible positive and negative effects on other food web components, including important recreational fisheries.	Efforts to restore Alewife populations on the Atlantic coast have increased in recent years. However, freshwater habitats, specifically lakes and ponds, have altered food web structures and dynamics reflecting the long period of anadromous Alewives’ absence. Restoration of anadromous populations may alter the lake and pond ecosystem dynamics, resulting in possible positive and negative effects on other food web components, including important recreational fisheries.
AquaPV Ecological modelling support	September 2024	Climate change has highlighted the need for continued development and expansion of renewable energy. Floating solar has been proposed as an efficient solution to meeting energy demands with a minimal footprint. This project with collaborators at OSU aims to model the ecological implications of floating solar for freshwater habitats as part of a larger DOE SETO project with INL and NREL.	Climate change has highlighted the need for continued development and expansion of renewable energy. Floating solar has been proposed as an efficient solution to meeting energy demands with a minimal footprint. This project with collaborators at OSU aims to model the ecological implications of floating solar for freshwater habitats as part of a larger DOE SETO project with INL and NREL.
A collaborative organizational network analysis of the Cooperative Research Units program	August 2024	The U.S. Geological Survey’s Cooperative Fish and Wildlife Research Units Program (CRU) establishes a relationship among the U.S. Geological Survey (USGS), U.S. Fish and Wildlife Service (USFWS), Wildlife Management Institute (WMI), a host university, and state resource agencies. The program’s mission is to provide education and technical assistance through graduate research in order to address the information needs of its members. Originating in 1935, it currently consists of 41 units in 39 states. Staff within the CRU have conducted decades’ worth of research while mentoring graduate students and providing technical assistance to cooperators on wildlife management issues. While the program’s mission has remained largely unchanged, the issues challenging fish and wildlife conservation have changed. Landscapes are increasingly fragmented, individuals are generally less attracted to outdoor activities, and wildlife use has shifted towards non-consumptive uses. This raises questions about the CRU’s support and sustainability into the future. Our study examines the CRU model that integrates graduate education in research and technical assistance to address Cooperator information needs, to explore the relevancy of the model in the current context of natural resources conservation. We are evaluating the program’s structure and socio-technical connectivity to identify motivations, relationships, and layered networks among members and their relationships to outcomes through an Organizational Network Analysis and Dynamic Network Analysis. Our investigation will include simulations informed by statistical analysis of the social networks and their evolutions and adaptations, to predict conditions under which outcomes may change. The goal is to elucidate how organizational factors may contribute to each cooperator network, how the networks have evolved, and how factors may influence future conditions of individual units and the CRU Program in general.	The U.S. Geological Survey’s Cooperative Fish and Wildlife Research Units Program (CRU) establishes a relationship among the U.S. Geological Survey (USGS), U.S. Fish and Wildlife Service (USFWS), Wildlife Management Institute (WMI), a host university, and state resource agencies. The program’s mission is to provide education and technical assistance through graduate research in order to address the information needs of its members. Originating in 1935, it currently consists of 41 units in 39 states. Staff within the CRU have conducted decades’ worth of research while mentoring graduate students and providing technical assistance to cooperators on wildlife management issues. While the program’s mission has remained largely unchanged, the issues challenging fish and wildlife conservation have changed. Landscapes are increasingly fragmented, individuals are generally less attracted to outdoor activities, and wildlife use has shifted towards non-consumptive uses. This raises questions about the CRU’s support and sustainability into the future. Our study examines the CRU model that integrates graduate education in research and technical assistance to address Cooperator information needs, to explore the relevancy of the model in the current context of natural resources conservation. We are evaluating the program’s structure and socio-technical connectivity to identify motivations, relationships, and layered networks among members and their relationships to outcomes through an Organizational Network Analysis and Dynamic Network Analysis. Our investigation will include simulations informed by statistical analysis of the social networks and their evolutions and adaptations, to predict conditions under which outcomes may change. The goal is to elucidate how organizational factors may contribute to each cooperator network, how the networks have evolved, and how factors may influence future conditions of individual units and the CRU Program in general.<br>
Yellow Lampmussel Habitat Assessment in the Connecticut River	April 2025	The Yellow Lampmussel (YLM), <i>Lampsilis cariosa</i>, is a freshwater mussel that has been declining throughout its range and is considered endangered in many states, including Massachusetts and Connecticut. Informal comparisons across boundaries have revealed that YLM populations occur in a variety of habitats throughout its range. However, little is known about the microhabitats that exist within the Connecticut River or their association with YLM. Mapping these fine-scale habitat features using side-scan sonar could illuminate this relationship. A goal of this project is to associate habitat characteristics within the Connecticut River and YLM presence/absence. A highly-accurate, fine-scale habitat assessment using side-scan sonar could be invaluable for land managers within the Connecticut River watershed and beyond.<br>An understanding of host fish for YLM is also essential for understanding the species’ historic and current distribution and developing conservation plans. Striped Bass (<i>Morone saxatilis</i>) is a piscivorous fish that may be a suitable host for YLM; it is closely related to a confirmed host fish species. Observations of YLM glochidial infestation in wild populations of Striped Bass with a large sample size, combined with successful encystment and metamorphosis in laboratory conditions, would confirm this species as a viable host fish. This would have important implications for the conservation of YLM, with Striped Bass serving as a critical source of long-distance dispersal across drainages.	Yellow Lampmussel (<i>Lampsilis cariosa) </i>is a priority at-risk freshwater mussel species for the USFWS and has been designated as endangered or another special status in many states, including MA and CT. Yellow Lampmussel populations occur in a variety of habitats throughout its range; the species inhabits a variety of substrates and flow conditions, suggesting impacts by different stressors. This project aims to assess potential locations for Yellow Lampmussel conservation action within the Connecticut River watershed based on mussel densities, host fish densities, and mussel habitat requirements. This project is a collaboration with the U.S. Fish and Wildlife Service, the Massachusetts Division of Fisheries and Wildlife, and the Connecticut Department of Energy and Environmental Protection. Results from this project may be useful for identifying target areas for novel surveys or candidate areas for release of propagated or relocated Yellow Lampmussel.
Sustainable Rivers Program: Updating flow ecology assumptions	December 2025	This project supports recent and ongoing efforts of the U.S. Geological Survey (USGS) in evaluation of a U.S. Army Corps of Engineers (USACE) effort known as the Sustainable Rivers Program (SRP) with a focus on performing the science and monitoring needed to quantify ecosystem responses to effects of USACE reservoir operations. Through this work statement and other activities, SRP seeks to cultivate scientific understanding of connections between reservoir operations and ecosystem responses for select rivers in unique ecoregions around the United States. Development of scientific knowledge is leveraged through implementation of environmental flow prescriptions at reservoirs, which alters land-water interactions thereby stimulating ecosystem responses that can be studied and quantified using field monitoring protocols and analysis. If operational changes are studied, resulting knowledge can be used to improve prescriptions and perpetuate a culture of adaptive management. Monitoring does not need to be exhaustive to be effective and requires constructive, informative, and timely guidance from scientists in the field to dam operators.	This Research Work Order supports the data compilation to inform field science needs related to environmental flows and includes the necessary first step towards developing clear, updated, scientifically defensible conceptual frameworks and diagrams that can be shared with stakeholders and used to inform future scientific efforts, supporting the efforts of the Oregon Water Science Center. Specifically, general models of flow ecology relationships will be linked and existing information describing physical and biological conditions in the Willamette River and how these conditions are influenced by streamflow will be compiled and summarized in order to parameterize and test model performance.
Lake food webs in Acadia National Park	May 2024	Introduced fishes can re-structure foodwebs, altering the flow of energy to other species and altering the subsidies that link aquatic systems to neighboring terrestrial habitats. These patterns are not always predictable, because they are the result of interactions with the other species present. The ponds within Acadia National Park have varied fish communities based on local conditions, stocking history, and fishing pressures. The resultant unique compositions, including native and introduced fishes, allows for the opportunity to examine both whether we observe consistent foodweb impacts for commonly invasive fishes and how those impacts are translating to effects on emergent aquatic insects available as subsidies to terrestrial fauna.	Ponds within Acadia National Park present a unique opportunity to leverage existing datasets while also aiding in their interpretation as they have been previously sampled in studies of mercury, as well as having repeated assessments of fish community composition. Lake conditions have also been studied for relationships with amphibian mortality. However, freshwater foodweb information, and the potential impacts of the suite of invasive fishes in the park, have yet to be studied in detail. By using CN stable isotopes we can trace both source and trophic level to reconstruct foodwebs for each pond that can be used to better understand the impacts of invasive fishes, establish baseline data for future research, and inform future fish management. For the proposed examination of freshwater foodwebs, in addition to outlining the existing foodweb structure, we will examine how impacts of invasive fishes may reach into neighboring terrestrial habitats, potentially impacting charismatic and conservation focused taxa such as birds.
Marine use of Atlantic sturgeon in the Gulf of Maine	September 2021	Atlantic sturgeon in the Gulf of Maine use freshwater habitat in the summer to spawn and feed before moving back to the marine environment. Patterns of marine habitat use are poorly characterized and this represents a conspicuous gap in knowledge of critical habitat use for these threatened/endangered fish. We sought to use satellite tags to track fish from the Kennebec and Penobscot Rivers in Maine to identify areas of marine use.	Atlantic sturgeon in the Gulf of Maine use freshwater habitat in the summer to spawn and feed before moving back to the marine environment. We used satellite tags to track fish from the Kennebec and Penobscot Rivers in Maine to identify areas of marine use.
Does predation limit Atlantic salmon recovery?	December 2025	Among migratory fish, Atlantic salmon have been culturally, economically and ecologically important. These fish have also been impacted by a suite of threats and the Gulf of Maine DPS Atlantic salmon were added to the federal Species of Concern list in 1997 and the Endangered Species list in 2000. In 2009, Atlantic salmon returning to the Penobscot, Kennebec, and Androscoggin Rivers were included in the Gulf of Maine DPS as a federally endangered species. <br> <br>Atlantic salmon are native to the northern Atlantic Ocean and its drainages. The anadromous form hatches from eggs deposited in cold headwater streams where it develops into a small, territorial drift-feeding fish (parr). As territorial juveniles in freshwater, Atlantic salmon parr may compete for resources with native and introduced species, limiting their access to resources (Callaway and Aschehoug 2000) and decreasing survival (Nakano et al. 1998; Gunckel et al. 2002). Smallmouth bass are notable as they were introduced into New England waters more than a century ago and have expanded into nearly every historical Atlantic salmon watershed (Warner 2005; Valois et al. 2009). Where they overlap, introduced smallmouth bass may compete with Atlantic salmon for physical habitat and food (Fausch 1998; Coghlan and Ringler 2005). Atlantic salmon populations may also suffer from direct predation by smallmouth bass in fresh water.<br> <br>The stream-dwelling parr undergoes a complex suite of behavioral, morphological and physiological changes resulting in a migratory smolt (McCormick and Saunders 1987). The parr-smolt transition is a critical transitional stage in the life history of this species. Successful transition into the marine environment is thought to occur during a “window of opportunity,” when physiological condition is optimal for survival (McCormick and Saunders 1987). Poor synchrony can result in high mortality in the estuary (McCormick et al. 1999; Stich et al., 2015) or at sea (Virtanen et al., 1991; Staurnes et al., 1993; Stich et al., 2014). As smolts leave rearing habitats and migrate seaward, they encounter geomorphic barriers, changing flow, varying turbidity, and a gauntlet of predators. Atlantic salmon currently travel through waters with a diverse array of nonnative resident fishes, including brown trout, largemouth bass, smallmouth bass, and northern pike. Migration is a time of high risk of predation (Blackwell et al. 1997; Kocik et al. 2009; Hawkes et al. 2013). High mortality of smolts is often observed in the estuaries (Kocik et al., 2009; Holbrook et al., 2011) and near-coastal waters (Lacroix, 2008; Dempson et al., 2011; Thorstad et al., 2012a; 2012b). The proposed work is aimed at better characterizing the role predation may have during their early life history.	In 2009, Atlantic salmon returning to the Penobscot, Kennebec, and Androscoggin Rivers were included in the Gulf of Maine DPS as a federally endangered species. As territorial juveniles in freshwater, Atlantic salmon parr may compete for resources with native and introduced species, limiting their access to resources and decreasing survival . This project will evaluate these influences to inform restoration efforts
Early Life History Metabolism in AtlanticS almon	December 2022	The energetic costs of migrating Atlantic salmon are high, and high energy demands likely influence gonadal development (egg size), spawning performance and probability of surviving to spawn again. Because the size of an egg can be a good predictor of survival probability, how egg size relates to embryo physiology is of interest for both conservation and aquaculture. <br> Working with partners at the University of Maine, we are developing techniques to quantify energy expenditure during embryonic development Moving forward, the respirometer trials will be expanded to include temperature acclimation treatments of embryos in conjunction with later life metabolic patterns. Such information can help to better understand the combined roles of dams and climate change in the restoration of Atlantic salmon.	The energetic costs of migrating Atlantic salmon are high, and high energy demands likely influence gonadal development (egg size), spawning performance and probability of surviving to spawn again. Because the size of an egg can be a good predictor of survival probability, how egg size relates to embryo physiology is of interest for both conservation and aquaculture. <br> Working with partners at the University of Maine, we are developing techniques to quantify energy expenditure during embryonic development Moving forward, the respirometer trials will be expanded to include temperature acclimation treatments of embryos in conjunction with later life metabolic patterns. Such information can help to better understand the combined roles of dams and climate change in the restoration of Atlantic salmon.
Changing Fish Communities in the Penobscot River After Dam Removal.	December 2022	Dam removals re-establish natural flow regimes and increase connectivity, profoundly affecting fish assemblages throughout the watershed. In Maine, the Penobscot River Restoration Project removed the two lowermost dams on the river and improved fish passage at other dams to help recover declining sea-run fishes and increase resilience of entire ecosystems. To quantify spatial and temporal changes associated with river rehabilitation efforts, fish assemblages are being assessed using boat electrofishing surveys (three years each, spring and autumn) prior to dam removal, shortly after removal, and six years post removal (in progress).<br>Together with NOAA and TNC, we have described distinct fish assemblages present prior to dam, and followed how these communities have changed to a more riverine assemblage. These changes, and their timeline, are important for understanding the management outcomes of dam removal.	Dam removals re-establish natural flow regimes and increase connectivity, profoundly affecting fish assemblages throughout the watershed. In Maine, the Penobscot River Restoration Project removed the two lowermost dams on the river and improved fish passage at other dams to help recover declining sea-run fishes and increase resilience of entire ecosystems. To quantify spatial and temporal changes associated with river rehabilitation efforts, fish assemblages are being assessed using boat electrofishing surveys (three years each, spring and autumn) prior to dam removal, shortly after removal, and six years post removal (in progress). <br>Together with NOAA and TNC, we have described distinct fish assemblages present prior to dam, and followed how these communities have changed to a more riverine assemblage. These changes, and their timeline, are important for understanding the management outcomes of dam removal.
Phenology and survival of migrating American eel	December 2021	Eels exhibit a complex, catadromous life history, migrating to the Sargasso Sea as large “silver” eels to spawn and die. Their progeny are carried by ocean currents as willow leaf–shaped leptocephalus larvae, metamorphosing into “glass” eels as they enter into river systems whereupon they initiate feeding and become “yellow” eels. Yellow eels take up residence in areas from the estuary to up river sites and grow. <br><br>This growth phase can last up to 25 years (Velez-Espino and Koops 2009) before undergoing a second transformation, including color change, to a downstream-migrating silver eel. Historically the American eel was the target species of a lucrative fishery (Baldwin et al. 1979), however this fishery has collapsed over the last few decades (Casselman 2003; MacGregor et al. 2008) and eels are in decline worldwide (Mathers and Stewart, 2009). Such declines are troubling as eels play an integral role in maintaining biotic integrity in fish communities (Meixler 2011). As such, eel conservation has become a high priority of both fishery managers and conservationists in many freshwater ecosystems.<br><br>One well documented source of mortality for silver eels is through hydroelectric facilities encountered during downstream migration (e.g. Carr and Whoriskey, 2008). Tagging studies have demonstrated that a majority of eels pass through turbines at hydroelectric facilities rather than using surface oriented bypass facilities (Brown et al., 2009). As a result, mortality from turbines at hydroelectric facilities can be significant (McCleave 2001, Durif et al. 2003) and serious injuries are observed in those that survive (Kiraly, University of Maine, unpublished data; Figure 1). Such a high loss of sexually mature adults can result in a substantial, negative impact on eel population dynamics. Decreasing mortality at dams is therefore an important conservation goal. Shutting down turbines during migration might satisfy conservation goals, but at an operational cost. Therefore the minimizing of such actions to mitigate eel loss is important to make the action financially feasible. <br>There is at present a rich body of literature on the timing of silver eel migration. The movement of eels occurs during a relatively short period in the fall, usually associated with episodes of high precipitation and high flow events (Durif and Elie 2008, Haro et al 2002, Haro 2003). In addition, eels tend to migrate at night and lunar phase is an important correlate of downstream migration. Despite numerous studies, there have been relatively few attempts to synthesize the existing information into a comprehensive model to predict eel migration (e.g. Haro et al., 2002; De Leo et al. 2009). Efforts that would allow sensitivity analysis of turbine shut down to conservation and financial objectives appear absent. Such a model could serve as a useful tool to managers to inform management and conservation decisions as to hydropower facility operation. <br><br>The proposed work will use field data to inform a predictive Bayesian forecasting modeling framework (e.g. Moravie et al. 2006) as to both timing of migration and behavior and survival at dams. Bayesian forecasting has proven to be an effective way to use available information and summarize the probability of future scenarios. As such, they have become an important tool in ecological management (Fabre et al. 2006, Moravie et al. 2006). In addition, Bayesian forecasting models are adaptable such that they can be updated as new information becomes available.	In North America, American eels (<i>Anguilla rostrata</i>) were the focus of commercial fisheries in the 1970s–1980s but have since been listed as a depleted stock in the United States and have measures of protection in Canada. One significant source of eel mortality occurs during the downstream migration of silver eels through the turbines at hydroelectric facilities. We are working with NOAA, USFWS, TNC and NSF to study catch data of downstream migrating silver phase American eel collected by commercial fishermen in Maine . The proposed work will use field data to inform a predictive model of both timing of migration and behavior and survival at dams. Such information can be used to strategically apply mitigation efforts at dams to minimize mortality.
Changed in patterns of estuarine use by diadromous fishes such as American shad and American Eel	December 2019	Since the early 20th century, passage by American shad past Veazie Dam (rkm 48) was biologically trivial. Spawning habitat for the population was restricted to the tidal estuary. Dam removals (Veazie and Great Works; rkm 60), and upstream fish passage modifications at other dams, are anticipated to reconnect American shad to most of their historic freshwater habitat upstream of Milford Dam (rkm 62). To assess how this change in access may influence estuarine use, we sampled both adult and juvenile shad. Adults were sampled in 2013-7 (cohorts restricted to the estuary; n= 540). Juveniles (n=220) were collected from the estuary (April to September), from 2011-4 (restricted to the estuary) and 2015-7 (connected to freshwater habitat). Otoliths were taken from all fish for age analysis; scales from adults were taken to assess spawning history. Adults were dominated by older age classes (4–8 yr) with a high incidence of repeat spawning. Otolith microchemistry (Sr and Ba) suggests that many juveniles were reared in elevated salinities, often moving into freshwater prior to fall migration. The general pattern of salinity use by juveniles has remained qualitatively unchanged post dam removal, likely reflective of low upstream recruitment.	Spawning habitat for American shad in the Penobscot River was restricted to the tidal estuary prior to two dam removal. To assess how this change in access may influence estuarine use through otolith micro-chemistry to identify patterns of salinity use.
Energetic impacts of passage delays in migrating adult Atlantic salmon	June 2021	Returns of Atlantic salmon (Salmo salar) have declined since the 1800s and remain low. Extensive restoration efforts have included recent dam removals in the Kennebec and Penobscot Rivers. The current adult passage performance criteria at Milford Dam (Penobscot) includes 95% passage within 48 hours of approach. This threshold has not been met and adults have been delayed for weeks. In the Kennebec system, passage solutions and criteria will be negotiated in the near future for four dams. It is likely that the rationale for the 48h passage criteria will be reassessed, and challenged if proposed. The current state of knowledge with respect to metabolic costs and fitness outcomes for delayed Atlantic salmon is not robust and there currently exists no clear quantification of risk associated with delay. We propose to characterize specific energetic costs of delays to upstream migrating adult salmon using bioenergetics modeling. This work will be informed by i) field assessments of water temperatures, ii) energetic assessment of adults, and iii) the thermal experience of adults. In the end we hope to compare the range of thermal experiences of these fish during their spawning migration, and quantify the theoretical risks of delays at dams that subject these fish to warmer temperatures. This work is central to ensuring effective passage to and from spawning habitat, a key objective for recovery of this federally endangered species. It is particularly relevant as the Gulf of Maine DPS of Atlantic salmon is currently NOAA’s Species in the Spotlight and the State of Maine Strategic Plan for the Restoration of Diadromous Fishes to the Penobscot River lists “improving fish passage” as a central objective for recovery.	Atlantic salmon runs in the Penobscot and Kennebec Rivers of Maine are federally endangered and remain low. Inefficient fishways at dams continue to slow and prevent upstream migrations to spawning habitat; delays of weeks to months are common. These delays expose fish to elevated water temperatures, resulting in increased metabolic demand. These energetic costs have not been quantified, nor have fitness outcomes been characterized, but energy loss may influence gonadal development, spawning performance and probability of surviving to spawn again. We are working with NOAA nad Maine Department of Marine Resources to better understand this risk. We propose to characterize specific energetic costs of delays to upstream migrating adult salmon using bioenergetics modeling. This work will be informed by i) field assessments of water temperatures, ii) energetic assessment of adults, and iii) the thermal experience of adults. These results will inform dam passage criteria standards for these fish.
Understanding decision-making behavior regarding fish passage and management in New England.	December 2019	Decision-making regarding dams in New England stands at a crossroad. Over 52 dams in Maine, New Hampshire, and Rhode Island will require FERC relicensing in the next decade, many are approaching their design life, and, as evidenced by the groundswell of support for the watershed-scale Penobscot River Restoration project in Maine, preferences for dams and ecosystem services are changing. However, despite increased momentum for change and renewed calls to consider a broader range of options including removal, dams remain a symbol of cultural identity, economic prosperity, and technological innovation; they represent a source for clean energy and an opportunity for recreation. Reconciling these competing demands is difficult and decisions are often fraught with intense controversy as stakeholders face uncertainties related to different management options. Placed squarely at the center of the contentious debate is numerous federal and state resource and regulatory agencies charged with the difficult task of balancing ecological, economic, and social tradeoffs related to dam relicensing decisions. <br>Numerous federal and state agencies assert jurisdiction over dam projects, and a confusing array of laws and policies inform dam relicensing, removal, retrofit, and on-going operations. As key stakeholders in the process, however, agencies have the unique opportunity to serve as “agents of change.” Through interagency coordination and engagement with stakeholders including private landowners, non-governmental organizations, municipal governments, and industry, agencies have the capacity to mobilize action at the basin-wide scale using a range of regulatory and non-regulatory tools. Conceptual “blueprints” for basin-scale hydropower development have been introduced (e.g., NOAA’s Basin-Scale Opportunity Assessment Initiative), and existing regulatory tools (e.g., compensatory mitigation under the Clean Water Act) and planning programs (e.g., Partners for Fish and Wildlife) can potentially be targeted to inform decision-making. To date, these decision frameworks and “hooks” have proven more difficult to implement in practice. Instead agency actions tend to be case-specific and reactive in response to individual projects and events rather than proactive, considering alternative actions and consequences before issues reach a boiling point. Research and engagement targeted at understanding agency actions and perspectives including knowledge gaps and challenges faced in the relicensing process is urgently needed to inform more proactive basin-scale decision-making at this critical juncture in dam decision-making.	Over 52 dams in Maine, New Hampshire, and Rhode Island will require FERC relicensing in the next decade, many are approaching their design life, and preferences for dams and ecosystem services are changing. Research and engagement targeted at understanding agency actions and perspectives including knowledge gaps and challenges faced in the relicensing process is urgently needed to inform more proactive basin-scale decision-making at this critical juncture in dam decision-making.
Optimizing strategies to hydraulically plant Atlantic salmon eggs based on fry dispersal patterns	December 2021	The Gulf of Maine Distinct Population Segment of Atlantic salmon has suffered from habitat loss and exploitation over the last century. Hatchery supplementation has unquestionably prevented the extirpation of the species over the last decades. Stocking older life history stages minimizes early life history mortality, but does so at a cost of limiting exposure to a natural freshwater environment. Egg planting is a process by which fertilized eggs from the hatchery are injected into the gravel in the fall replicates the natural spawning process in streams and provides a natural experience which can be important for adaptation. This methodology has been used experimentally within the region, but significant uncertainties exist in developing the effective implementation of this method at a greater scale. Specifically, the habitat dependent distribution of juveniles after emergence from the gravel would provide information necessary to apply the technique to meet conservation hatchery goals with respect to fall parr densities. We propose to characterize the dispersal pattern of egg planted Atlantic salmon as a function of habitat and use these data to construct a GIS based tool to inform stocking. This work, if successful, can help to optimize the application of egg planting at a management level.	Hatchery supplementation has unquestionably prevented the extirpation of Atlantic salmon over the last decades. However, the Gulf of Main DPS of Atlantic salmon is listed as endangered under the ESA. We propose to characterize the dispersal pattern of egg planted Atlantic salmon as a function of habitat and use these data to construct a GIS based tool to inform stocking. To do so we are collaborating with USFWS, NOAA, Maine Department of Marine Resources and the Penobscot Indian Nation. This work, if successful, can help to optimize the application of egg planting at a management level.

Research Publications

Research Publications	Publication Date
Zydlewski,G., J. Zydlewski, J. Johnson (2009) Patterns of migration and residency in coastal cutthroat trout. Journal of Fish Biology. 75(1) 203-222. \| Download	January 2009
Zydlewski, J. (2021). Book Review: “From catastrophe to recovery: stories of fisheries management successes” edited by Krueger, Taylor and Youn. Fisheries. DOI: 10.1002/fsh.10604 \| Download	June 2021
Zydlewski, J., J. Johnson, J. Brunzell and J. Hogle, M. Karnowski, S. Clements, C. Shreck (2008) Rapid seaward migration of coastal cutthroat trout in the Columbia River. Proceedings of the 2005 Coastal Cutthroat Trout Symposium \| Download	January 2008
Zydlewski, J., Cox, O., O’Malley, A., Ruksznis, P., and Trial, J. (2014) Growth and smolting in lower mode Atlantic salmon, Salmo salar, stocked into the Penobscot River, Maine North American Journal of Fisheries Management 34:147-158. \| Download	February 2014
Zydlewski, J., Bailey, M. Roy, S., Sheehan, T., Sprankle, K. Stich, D. (2021) What have we lost? American shad’s impounded history. Frontiers in Marine Science. Volume 8:734213. doi: 10.3389/fmars.2021.734213 \| Download	October 2021
Zydlewski, J. and Wilkie, M. (2013) Freshwater-seawater transitions in juvenile euryhaline fish. In: Euryhaline Fishes Fish Physiology, Volume 32, Editors: McCormick, S.D., Farrell A.P. and Brauner, C.J., Elsevier Science Publishers.pp 253-326. \| Download	January 2013
Zydlewski, J. Zydlewski, G., Kennedy, B., and Gale, W. (2014) Smolting in coastal cutthroat trout, Onchorhynchus clarkii clarkii. Journal of Fish Biology. 85:1111-1130. \| Download	September 2014
Zydlewski, J. 2008. Salmonid Field Protocols Handbook - Book Review. Fisheries. \| Download	September 2008
Zydlewski, G., Kinnison, M., Dionne, P., Zydlewski, J., and Wippelhauser, G. (2011) Understanding habitat connectivity for shortnose sturgeon: the importance of small coastal rivers. Journal of Applied Ichthyology. 47 (Suppl. 1): 1-4. \| Download	October 2011
Zydlewski, G. and Zydlewski, J. (2012) Long-term Seawater performance of Atlantic salmon smolts. Aquaculture. 362-363:121-126. doi:10.1016/j.aquaculture.2011.03.024 \| Download	October 2011
Zydlewski J., Stich, D.S., and Sigourney, D. (2016) Hard choices in assessing survival past dams; a comparison of single and paired release strategies. Canadian Journal of Fisheries and Aquatic Sciences. (999) 1-13. DOI:10.1139/cjfas-2015-0480 \| Download	July 2016
Zydlewki, J. (2023) American Eel. Chapter (Species Essay) in “Our Maine”, edited by Aram Calhoun, Mac Hunter and Kent Redford.	July 2023
Whittum, K., Zydlewski, J., Coghlan, Jr., S., Hayes, D., Watson, J., and Kiraly, I. (2023) Fish Assemblages in the Penobscot River: A Decade after Dam Removal. Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 15:e10227. DOI: 10.1002/mcf2.10227 \| Download	January 2023
Weaver, D., Sigourney, D., Delucia, M., Zydlewski, J. (2021) Characterizing Downstream Migration Timing of American Eels Using Commercial Catch Data in the Penobscot and Delaware Rivers. Marine and Coastal Fisheries, 13(5): 534-547. \| Download	October 2021
Weaver, D., Ratten, S., Coghlan, Jr., S., and Sherwood, G., and Zydlewski, J. (2018) Age and growth of a native, lightly exploited, population of lake whitefish Coregonus clupeaformis in a small natural lake in Maine, USA. Northeastern Naturalist 25(4):599-610. DOI: 10.1656/045.025.0406 \| Download	November 2018
Weaver, D., Coghlan, S., and Zydlewski, J. (2016) Sea Lamprey Carcasses Exert Local and Variable Food Web Effects in a Nutrient-limited Atlantic Coastal Stream. Canadian Journal of Fisheries and Aquatic Sciences.(online) DOI: 10.1139/cjfas-2015-0506 \| Download	July 2016
Weaver, D., Coghlan, S., and Zydlewski, J. (2015) Decomposition of Sea Lamprey Carcasses: Temperature Effects, Nutrient Dynamics, and Implications for Stream Food Webs. Hydrobiologia. On line - DOI 10.1007/s10750-015-2302-5. \| Download	April 2015
Weaver, D., Coghlan Jr., S., Greig, H., Klemmer, A., Perkins, L., and Zydlewski, J. (2018) Subsidies from anadromous sea lamprey (Petromyzon marinus) carcasses function as a reciprocal nutrient exchange between marine and freshwaters. River Research and Applications. DOI: 10.1002/rra.3291 \| Download	May 2018
Weaver, D., Coghlan Jr., S. and Zydlewski, J. (2018) The influence of nutrients from carcasses of sea lamprey (Petromyzon marinus) on larval growth and spawner abundance. Fisheries Bulletin. 116:142–152, DOI: 10.7755/FB.116.2.3 \| Download	January 2018
Weaver, D., Coghlan Jr., S. and Zydlewski, J. (2018) Effects of sea lamprey substrate modification and carcass nutrients on macroinvertebrate assemblages in a small Atlantic coastal stream. Journal of Freshwater Ecology, 33:1, 19-30, DOI: 10.1080/02705060.2017.1417168 \| Download	January 2018
Weaver, D., Brown, M., and Zydlewski, J. (2019) Observations of American Shad Approaching and Using a Vertical Slot Fishway at the Brunswick Head-of-Tide Dam on the Androscoggin River, Maine. North American Journal of Fisheries Management. DOI: /10.1002/nafm.10330 \| Download	July 2019
Watson, J. Coghlan, Jr., S., Zydlewski, J., Hayes, D., and Stich, D. (2019) Implications of Recovering River Herring Alosa spp. Populations on Smallmouth Bass, Micropterus dolomieu, Diet and Growth. “Managing Centrarchids in Rivers and Streams" symposium proceedings of the American Fisheries Society. \| Download	June 2019
Watson, J. Coghlan, Jr., S., Zydlewski, J., Hayes, D., and Kiraly, I. (2018) Dam Removal and fish passage improvement influence fish assemblages in the Penobscot River, Maine. Transactions of the American Fisheries Society. DOI: 10.1002/tafs.10053 \| Download	May 2018
Wathen, G., Coghlan, S., Zydlewski, J., and Trial, J. (2012) Effects of smallmouth bass (Micropterus dolomeiu) on Atlantic salmon (Salmo salar) habitat use and diel movements in an artificial stream. Transactions of the American Fisheries Society. \| Download	January 2012
Wathen, G., Coghlan, S., Zydlewski, J., and Joan Trial, J. 2011. Habitat Selection and Overlap of Atlantic Salmon and Smallmouth Bass Juveniles in Nursery Streams. Transactions of the American Fisheries Society 140(5): 1145-1157. \| Download	September 2011
Vogel, S., Jansujwicz, J., Sponarski, C and Zydlewski, J. (2020) Science in action or science inaction? Evaluating the implementation of "best available science" in hydropower relicensing. Energy Policy 143:1-10. DOI: 10.1016/j.enpol.2020.111457 \| Download	August 2020
Stucki, D.S., S.T. McKinney, and J.C.B. Nesmith. 2012. Sierra Nevada Network White Pine Community Dynamics Annual Monitoring Report. Natural Resource Data Series NPS/SIEN/NRDS––2012/405. National Park Service, Fort Collins, Colorado. \| Download	November 2012
Stich, D.S., Zydlewski, G.B., and Zydlewski J. (2015) Physiological preparedness and performance of Atlantic salmon Salmo salar smolts in relation to behavioural salinity preferences and thresholds. Journal of Fish Biology. doi:10.1111/jfb.12853 \| Download	December 2015
Stich, D.S., Zydlewski, G.B., Kocik, J. and Zydlewski, J. (2015) Linking behavior, physiology, and survival of Atlantic Salmon smolts during estuary migration. Marine and Coastal Fisheries. 7(1) 68-86. \| Download	April 2015
Stich, D.S., Kinnison, M., Kocik, J. and Zydlewski J. (2015) Initiation of migration and movement rates of Atlantic Salmon smolt migration in fresh water. Canadian Journal of Fisheries and Aquatic Sciences. 72(9): 1339-1351. \| Download	May 2015
Stich, D.S., Bailey, M.M. and Zydlewski J. (2014) Survival of Atlantic salmon Salmo salar smolts through a hydropower complex in the lower Penobscot River, Maine USA. Journal of Fish Biology. 85:1074-1096 \| Download	September 2014
Stich, D.S., Bailey, M., Holbrook, C., Kinnison, and Zydlewski J. (2015). Catchment-wide survival of wild- and hatchery-reared Atlantic Salmon smolts in a changing system. Canadian Journal of Fisheries and Aquatic Sciences. 2:1–14, dx.doi.org/10.1139/cjfas-2014-0573 \| Download	August 2015
Stich, D., Sheehan, T., and Zydlewski, J. (2018) A Dam Passage Performance Standard Model for American Shad. Canadian Journal of Fisheries and Aquatic Sciences. DOI:10.1139/cjfas-2018-0008 \| Download	February 2019
Spencer, R.C., J. Zydlewski and G. Zydlewski. (2010) Migratory urge and gill Na+, K+ -ATPase activity of hatchery Atlantic salmon (Salmo salar) smolts from Dennys and Penobscot River stocks in Maine. Transactions of the American Fisheries Society. 139:947-956. \| Download	July 2010
Song, C., O’Malley, A., Roy, S., Zydlewski, J., Barber, B., and Mo, W. (2019) Managing dams for energy and fish tradeoffs: What does a win-win solution take? Science of the Total Environment 669:833-843. DOI: 10.1016/j.scitotenv.2019.03.042 \| Download	February 2019
Song, C, O’Malley, A., Zydlewski,J., and Mo, W (2020) Balancing fish-energy-cost tradeoffs through strategic basin-wide dam management. Resources, Conservation & Recycling.Resources, Conservation & Recycling 161:1-12. DOI: 10.1016/j.resconrec.2020.104990 \| Download	April 2020
Snook, E., Letcher, B., Dubreuil, T., Zydlewski, J., Whiteley, A., Hurley,S., and Danylchuk, A. (2015) Movement patterns of brook trout in a restored coastal stream system in southern Massachusetts. Ecology of Freshwater Fish. DOI: 10.1111/eff.12216 \| Download	July 2015
Sigourney, D., Zydlewski, J., Hughes, E., Cox, O. (2015) Transport, dam passage and size selection of adult Atlantic Salmon in the Penobscot River, Maine. North American Journal of Fisheries Management. 35:1164-1176 \| Download	January 2015
Shrimpton, M, Zydlewski, J, and Heath W (2007) Effects of sediment load on the smolt physiology in ocean type Chinook salmon. Aquaculture. \| Download	January 2005
Schaefer, S. M., and W. B. Krohn. 2002. Chapter 37 - Testing predicted vertebrate occurrences from habitat associations: improving the interpretation of commission error rates. Pages 419-428 IN Scott, J. M., P. J. Heglund, M. Morrison, J. B. Haufler, M. G. Raphael, W. A. Wall, and F. B. Samson (editors). Predicting species occurrences: issues of scale and accuracy. Island Press, Corvalis, OR. 868 pp.	January 2002
Ryan, K., Zydlewski, J., and Calhoun, A. (2014) Using passive integrated transponder (PIT) systems for terrestrial detection of blue-spotted salamanders in situ. Journal of Herpetology 9(1):97−105 \| Download	January 2014
Ryan, K., Calhoun, A., Timm, B. and Zydlewski, J. (2014) Monitoring Eastern Spadefoot (Scaphiopus holbrookii) activity using a passive integrated transponder (PIT) system and the effects of selected meteorological variables on burrow emergence. Journal of Herpetology (on line ahead of print).	September 2014
Rubenstein, S., Peterson, E., Christman, P., and Zydlewski, J. (2022) energetic consequences to migrating Atlantic salmon (Salmo salar) delayed below dams. Canadian Journal of Fisheries and Aquatic Sciences. DOI: TBD. IP-137191, BAO approval date August 15, 2021. [C:100, D:10, I:30, W:10]. \| Download	October 2022
Roy, S., Uchida, E., Souza, S., Blachly, B., Fox, E., Gardner, K., Gold, A., Jansujwicz, J., Klein, S., McGreavy, B., Mo, W., Smith, S., Vogler, E., Wilson, K., Zydlewski, J., and Hart, D. (2018) Damming decisions: a multi-scale approach to balance trade-offs among dam infrastructure, river restoration, and cost. Proceedings of the National Academy of Sciences of the United States of America. 115(47): 12069-12074. DOI: 10.1073/pnas.1807437115 \| Download	December 2018
Roy, S., Daignault, A, Zydlewski, J., Truhlar, A., Smith, S., Jain, S., and Hart, D. (2020) Coordinated river infrastructure decisions enhance social-ecological resilience. Environmental Research Letters. On Line Aug 7.	September 2020
Risley, C.A.L. and J. Zydlewski (2010) Assessing the effects of catch and release regulations on a brook trout population using and age-structured model. North American Journal of Fisheries Management 30:1434-1444. \| Download	December 2010
Ramberg-Pihl, N., Klemmer, A., Zydlewski, J., Coghlan, Jr.,S., and Greig, H. (2023) Unraveling the impacts of competition and warming on juvenile Atlantic salmon (Salmo salar) performance in Maine streams. Ecology of Freshwater Fish. 32:606–617. DOI: 10.1111/eff.12711 \| Download	April 2023
Prolux, G., K. Aubry, J. Birks, S. Buskirk, C. Fortin, H. Frost, W. Krohn, L. Mayo, V. Monakhov, D. Payer, M. Saeki, M. Santos-Reis, R. Weir, and W. Zielinski. 2004. Chapter 2 - World distribution and status of the genus MARTES in 2000. Pages 21-76 IN D. J. Harrison, A. K. Fuller, and G. Proulx (editors). Martens and fishers (MARTES) in human altered environments: an international perspective. Springer, New York, NY. 279 pp.	September 2004
Poulet, C., Lassalle, G., Jordaan, A., Limburg, K., Nack, C., Nye, J., O’Malley, A., O’Malley-Barber, B., Stich,D., Waldman, J., Zydlewski, J. and Lambert, P. (2023) Effect of dispersal capacities and reproductive strategies/tactics on the structure of American shad populations across the species native range: an exploration based on a mechanistic species distribution model. Ecosphere 14(12): 1-21. DOI: 10.1002/ecs2.4712	October 2023
Popescu, V., Brodie, B.S., Hunter, M., and Zydlewski, J. (2012) Use of olfactory cues by newly metamorphosed wood frogs (L. sylvaticus) during emigration. Copeia.2012(3):424-431. \| Download	July 2012
Pope, A.C., Kock, T.J., Perry, R.W., Cogliati, K.M., O'Malley, K.G., Murphy, C.A., Hance, D.J., Fielding, S.D. Using parentage based tagging to estimate survival of Chinook salmon fry in a large storage reservoir. Environmental Biology of Fishes.	July 2024
Peterson, E., Thors, R., Frechette, D., Zydlewski, J. (2023) Efficiency of adult sea lamprey approach and passage at the Milford Dam fishway, Penobscot River, Maine, United States. North American Journal of Fisheries Management. 43:1052–1065. DOI: 10.1002/nafm.10919 \| Download	August 2023
Peterson, E., Sheehan, T., and Zydlewski, J. (2021) Verification of circulus deposition rates in Atlantic Salmon, Salmo salar, smolts from three Maine rivers. Journal of Northwest Atlantic Fishery Science, Vol. 52: 19–27. DOI: 10.2960/J.v52.m733 \| Download	September 2021
O’Malley, A., Enterline, C., and Zydlewski, J. (2017) Comparison of size, growth and age structure among anadromous and landlocked populations of rainbow smelt (Osmerus mordax). North American Journal of Fisheries Management. 37:2, 326-336. DOI: 10.1080/02755947.2016.1264508 \| Download	April 2017
Ostrand, K., G. Zydlewski, W. Gale, J. Zydlewski (2011) Long Term Retention, Survival, Growth, and Physiological Indicators of Salmonids Marked with Passive Integrated Transponder Tags.In J. McKenzie, Q. Phelps, R. Kopf, M. Mesa, B. Parsons, and A. Seitz, editors. Advances in fish tagging and marking technology. American Fisheries Society, Symposium 76, Bethesda, Maryland. \| Download	August 2011
Murphy, C.A., Pollock, A.M.M., Strecker, A., Johnson, S.L. 2022. Minimal diel vertical migration and consistent zooplankton capturability in low productivity reservoirs, Oregon. Journal of Plankton Research https://doi.org/10.1093/plankt/fbac060 \| Abstract	November 2022	Diel migrations of zooplankton occur throughout marine and freshwater systems, and can complicate inferences from studies that focus on daytime observations. Sampling only during daytime can mischaracterize zooplankton distributions and abundances if populations perform vertical or horizontal diel migrations. Zooplankton often display reduced capture avoidance at night in addition to occupying areas easier to sample near the surface and away from littoral structure and the benthos. We examined zooplankton during daytime and nighttime new moon periods using discrete depth sampling in oligo-mesotrophic reservoirs in Oregon, USA. These reservoirs have limited littoral structure, but support populations of zooplanktivorous fishes that we expected to drive diel vertical migrations. Contrary to our expectations, most zooplankton taxa were within 2 meters of their daytime distributional peak and did not display significant differences in abundance from day to night sampling. We consider factors that may help predict whether diel migration occurs in a system. Where daytime sampling is sufficient for characterizing zooplankton densities and distributions, costs and risks specific to nighttime sampling may be avoided. Improving our understanding of zooplankton dynamics, particularly in ecosystems with limited diurnal variability, is an important part of understanding lake and reservoir food webs and can optimize the efforts of future studies.
Murphy, C.A., Pollock, A.M., Johnson, S.L., and Arismendi, I. Linked foraging and bioenergetics modeling may inform fish parasite infection dynamics. Environmental Biology of Fishes \| Abstract	May 2023	The parasitic copepod <i>Salmincola californiensis</i> infects Pacific salmon and trout (<i>Oncorhynchus </i>spp.) and often reaches high prevalence and intensity in reservoirs compared to stream systems. Recent research has indicated an important role of temperature in copepod development and fish susceptibility. Here, we examine the role of temperature on relative infection risk for juvenile Chinook Salmon in multiple reservoirs of the upper Willamette River Basin, Oregon. We used and expanded the GrowChinook model (a linked foraging and bioenergetics model) to estimate juvenile salmon infection risk. Based on salmon vertical migration patterns, we added estimates of copepod generations produced and thermal strata metrics for the infectious copepodid lifestage that appear associated with copepodid aggregations and increased infection risk. Our model predicted that Chinook Salmon in Lookout Point Reservoir consistently presented the greatest infection hours and estimated copepod generations, especially compared to Cougar Reservoir. This relative modelled risk is consistent with recent models of infection driven mortality and the severe damage caused by the infectious copepodid, a lifestage that is not readily visible in the field and thus has not been included in traditional infection prevalence and intensity counts. We discuss model limitations, potential for future research, and the potential for application of the copepod expansion equations to existing linked foraging and bioenergetics models or observed behaviors of salmonids in other lentic systems. We demonstrate that using a temperature sensitive model framework to test our existing knowledge and assumptions about copepod infection dynamics is useful in interpreting other lines of evidence, such as mortality estimates. Collectively, this work provides a testable framework for future comparisons of infection potential by this parasite infecting Pacific salmon and trout species.
Murphy, C.A., Gerth, W.G., Neal, T., Antonelli, K., Sanders, J.L., Williams T., Roennfeldt, R-L., Crowhurst, R., Arismendi, I. Evidence for infection influencing survival of the freshwater copepod Salmincola californiensis, a parasite of Pacific salmon and trout. https://doi.org/10.1002/aah.10206 \| Publisher Website	November 2023
Murphy, C.A., A. Pollock, I. Arismendi, and S.L. Johnson. HABs and HAB nots: Inconsistent timing of phytoplankton blooms across upper Willamette Reservoirs, Oregon, USA. \| Publisher Website	November 2023
Murphy C.A., Romer J.D., Arismendi I., Emig R., Monzyk F., Stertz K. and Johnson S.L. 2021. Damming Chinook Salmon fry: Evidence for predation by non-native warmwater fishes in in reservoirs. Ecosphere 12(9):03757. DOI: 10.1002/ecs2.3757	September 2021
Murphy C.A., Johnson S.L., Gerth W., Pierce, T. and Taylor G. 2021. Unintended consequences of selective water withdrawal: Thermal restoration may restructure downstream macroinvertebrate communities. DOI: 10.1029/2020WR029169 \| Abstract \| Publisher Website	June 2021	Regulated rivers downstream of dams often exhibit highly modified thermal regimes in addition to modified hydrologic regimes; downstream river temperatures can be seasonally much warmer or cooler than unregulated streams. Selective water withdrawals can be used to minimize thermal impacts to downstream reaches. However, other water quality parameters, in-reservoir production, and species composition also vary with depth. In the South Fork McKenzie River, in the Pacific Northwest of North America, an existing large dam was retrofitted to mix and export water from multiple depths, allowing dam operators to adjust the outflow temperatures to be in sync with the upstream thermal regime. We examined benthic macroinvertebrate responses after implementation of selective water withdrawal, comparing it to thermally similar flow-through conditions, expecting to see shifts in the community over time to resemble upstream, undammed reaches. However, species composition and traits downstream of the dam became more dissimilar to upstream and to flow-through after selective water withdrawal. These changes included increases in non-insect taxa and taxa known to feed on plankton and detritus. The most likely explanation for this transition is that selective water withdrawal from multiple depths of a stratified reservoir included epilimnetic releases, which resulted in increased export of plankton and organic material downstream. This strategy favored taxa able to capitalize on resource subsidies from the reservoir. Our findings highlight the interconnected nature of responses to dams and dam operations, including the importance of considering biotic communities in addition to temperature and flow when planning water management strategies.
Murphy C.A., Gerth W., Neal T. and Arismendi I. 2022. A low-cost rigid plankton light trap design with specific wavelength LEDs and modifications for shallow and deep deployment. Neobiota. https://doi.org/10.3897/neobiota.73.76515	April 2022
Molina-Moctezuma, A., and Zydlewski, J. (2020) A decision making tool for evaluating biological and statistical thresholds for survival analysis. River Research and Applications 2020:1–9. DOI: 10.1002/rra.3616 \| Download	February 2020
Molina-Moctezuma, A., Peterson, E., and Zydlewski, J. (2021) Movement, Survival, and Delays of Atlantic Salmon Smolts in the Piscataquis River, Maine, USA. Transactions of the American Fisheries Society, 150(3), 345-360. DOI: 10.1002/tafs.10289 \| Download	May 2021
Molina-Moctezuma, A., Stich, D., and Zydlewski, J. (2022) Effects of dam-induced delays on survival of Atlantic salmon juveniles in the Penobscot River. Canadian Journal of Fisheries and Aquatic Sciences. DOI: TBD. IP-129261, BAO approval date August 31, 2022. [C:60, D:10, I:20, W:10]. \| Download	November 2022
Midway, S. R., T. Wagner, J. D. Zydlewski, B. J. Irwin, and C. P. Paukert. 2016. Transboundary Fisheries Science: Meeting the Challenges of Inland Fisheries Management in the 21st Century. Fisheries 41:537-546. \| Download	September 2016
Mensinger, M., Hawkes, J., Goulette, G., Mortelliti, A., Blomberg, E., and Zydlewski, J. (2024) Dams facilitate predation during Atlantic salmon smolt migration. Canadian Journal of Fisheries and Aquatic Sciences 81 (1): 38-51. DOI: 10.1139/cjfas-2023-0175	January 2024
Mensinger, M., Brehm, A., Mortelliti, A., Blomberg, E., Zydlewski, J. (2021) Eel personality and body length influence passage success in experimental fishway. Journal of Applied Ecology. DOI: 10.1111/1365-2664.14009 \| Download	August 2021
Mensinger, M., Blomberg, E., and Zydlewski, J. (2021) The consequences of dam passage for migrating American eel in the Penobscot River, Maine. Canadian Journal of Fisheries and Aquatic Sciences. 78(8):1181-1192. \| Download	June 2021
McKinney, S. T., T. Rodhouse, L. Chow, G. Dicus, L. Garrett, K. Irvine, D. Sarr, and L. A. H. Starcevich. 2012. Monitoring white pine (Pinus albicaulis, P. balfouriana, P. flexilis) community dynamics in the Pacific West Region: Klamath, Sierra Nevada, and Upper Columbia Basin Networks. Natural Resource Report NPS/PWR/NRR—2012/532. National Park Service, Fort Collins, Colorado.	May 2012
Maynard, G.A., Kinnison, M.T., and Zydlewski, J. (2017) Size Selection from Fishways and Potential Evolutionary Responses in a Threatened Atlantic Salmon Population. River Research and Applications. 2017;1–12 DOI: 10.1002/rra.3155 \| Download	March 2017
Maynard, G., Izzo, L., and Zydlewski, J. (2018) The fate of hatchery-spawned Atlantic Salmon kelts released into the Penobscot River, Maine. Fishery Bulletin 116:281-290. DOI: 10.7755/FB.116.3-4.6 \| Download	October 2018
Larson, M.S., A. Choudhury, E.N. Gardner, P. Konstantinidis, C.A. Murphy, M.L. Kent, J.T. Peterson, and C.E. Couch. 2024. Diet and Philonema oncorhynchi infections in reservoir-rearing juvenile Chinook salmon (Oncorhynchus tshawytscha). Transactions of the American Fisheries Society153(3): 312-325. \| Abstract \| Publisher Website	May 2024	Dams and reservoirs can alter juvenile growth and survival of migratory salmonids through several physical and biological mechanisms. Juvenile Chinook salmon (<i>Oncorhynchus tshawytscha</i>)<b> </b>produced above large hydropower dams may have associated passage mortality, but reservoirs created by these dams can support rapid growth. Characterizing the biotic drivers of growth and mortality in reservoirs may aid in understanding the cumulative effects of river impoundments on migratory salmonid populations. The purpose of this study is to understand how reservoirs facilitate rapid growth in juvenile Chinook salmon by characterizing diet composition throughout the summer and fall. We found that juvenile Chinook salmon frequently consume young-of-year centrarchids, which likely contributes to rapid growth. Piscivory was highest from July through September and decreased with surface temperature beginning in late September and continuing through December. Correspondingly, zooplankton and arthropod consumption increased in November and December. We also recorded prevalence of the parasitic nematode <i>Philonema oncorhynchi</i> in the coelom. Prevalence of macroscopic <i>P. oncorhynchi</i> infections was high (35%) but decreased over time and was lower in the larger fish, indicating parasite-associated mortality.
Krohn, W., C. Hoving, D. Harrison, D. Phillips, and H. Frost. 2004. Chapter 5 - MARTES foot-loading and snowfall distribution in eastern North America: implications to broad-scale distributions and interactions of mesocarnivores. Pages 115-131 IN D. J. Harrison, A. K. Fuller, and G. Proulx (editors). Martens and fishers (MARTES) in human altered environments: an international perspective. Springer, New York, NY. 279 pp.	September 2004
Krohn, W. B., and R. B. Owen, Jr. 2008. Malcolm W. Coulter (1920-2008) [obituary]. The Maine Wildlifer, 33(2): 7-9. [Also published on pages 6 and 7 of the 2008 fall issue of the newsletter of the Northeast Section of The Wildlife Society (TWS), and on the web site of the international TWS].	November 2008
Krohn, W. B., and M. R. Massaro. 2006. Fur into feathers: Manly Hardy and his collection of North American birds. Pages 117-133 IN P. Benes (editor), Preceedings of the 2004 Dublin Seminar on New England collectors and Collections. Boston, College, Boston, MA. 224pp.	December 2006
Krohn, W. B., and C. L. Hoving. 2010. Early Maine wildlife - historical accounts of Canada lynx, moose, mountain lion, white-tailed deer, wolverine, wolves, and woodland caribou, 1603-1930. University of Maine Press, Orono. 523 pp. plus i-x (& 50 illustrations). \| Abstract	September 2010	Description will be posted on the web site of the University of Maine Press.
Krohn, W. B., R. L. Dressler, and G. M. Stadler. 2002. Successful integration of GAP databases into town planning: the Maine experience. Pages 48-50 IN GAP Analysis Bulletin No. 11, USGS Biological Resources Division, Moscow, ID. 88 pp.	December 2002
Krohn, W. B. 2005. A fall fur-hunt from Maine to New Brunswick, Canada: the 1858 journal of Manly Hardy. Northeastern Naturalist, 12 (4): 509-541.	December 2005
Krohn, W. B. (compiler and editor). 2005. Manly Hardy (1832-1910): the life and writing of a Maine fur-buyer, hunter, and naturalist. Northeast Folklore, Vol. 38, University of Maine, Orono, ME. 343pp.	March 2003
Kiraly, I., Coghlan, S., Zydlewski, J., and Hayes, D. (2014) An assessment of fish assemblage structure in a large river prior to dam removal. River Research and Applications. DOI: 10.1002/rra.2738 \| Download	February 2014
Kiraly, I., Coghlan, S., Zydlewski, J., and Hayes, D. (2014) A comparison of two sampling designs for fish assemblage assessment in a large river. Transactions of the American Fisheries Society. 143(2), 508-518. \| Download	March 2014
Keane, Robert E.; Tomback, D.F.; Aubry, C.A.; Bower, A.D.; Campbell, E.M.; Cripps, C.L.; Jenkins, M.B.; Mahalovich, M.F.; Manning, M.; McKinney, S.T.; Murray, M.P.; Perkins, D.L.; Reinhart, D.P.; Ryan, C.; Schoettle, A.W.; Smith, C.M. 2012. A range-wide restoration strategy for whitebark pine (Pinus albicaulis). Gen. Tech. Rep. RMRS-GTR-279. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 108 p. \| Download \| Publisher Website	June 2012
Kazyak, D., Letcher, B.H., and Zydlewski, J. (2013) Growth variability of brook char (Salvelinus fontinalis) in Coastal Maine. Ecology of Freshwater Fish. doi: 10.1111/eff.12105 \| Download	September 2013
Kazyak, D. and Zydlewski, J. (2012) High-Density Polyethylene Pipe: A New Material for Pass-By Passive Integrated Transponder Antennas. North American Journal of Fisheries Management 32(1):49-52. \| Download	January 2012
Johnston, C., Zydlewski, G., Smith, S., Zydlewski, J., and Kinnison, M. (2018) River reach restored by dam removal offers suitable spawning habitat for endangered shortnose sturgeon. Transactions of the American Fisheries Society. DOI:10.1002/tafs.10126 \| Download	October 2018
Johnson, J., Baumsteiger, J., Zydlewski, J., Hudson, M. and W. Ardren (2010) Evidence of Panmixia between Sympatric Life History Forms of Coastal Cutthroat Trout in Two Lower Columbia River Tributaries. North American Journal of Fisheries Management 30:691–701. \| Download	May 2010
Johnson, C. M., and W. K. Krohn. 2001. The importance of survey timing in monitoring seabird populations. Waterbirds, 24(1):22-33.	September 2001
Johnson, C. M., and W. B. Krohn. 2002. Chapter 13 - Dynamic patterns of association between environmental factors and island use by breeding seabirds. Pages 171-182 IN Scott, J. M., P. J. Heglund, M. Morrison, J. B. Haufler, M. G. Raphael, W. A. Wall, and F. B. Samson (editors). Predicting species occurrences: issues of scale and accuracy. Island Press, Corvalis, OR. 868 pp.	January 2002
Johnson, C. M., and W. B. Krohn. 2001. Monitoring nesting seabirds: reply to a commentary by Ian C. T. Nisbet. Waterbirds, 24(3): 461-466.	December 2001
Jackson, C. and J. Zydlewski (2009) Summer movements of sub-adult brook trout, landlocked Atlantic salmon and smallmouth bass in the Rapid River, Maine. Journal of Freshwater Ecology. 24(4) 567-580. \| Download	December 2009
J. Zydlewski, G. Zydlewski, and R. Danner. (2009) Descaling impairs the osmoregulatory ability of Atlantic salmon smolts. Transactions of the American Fisheries Society. 138:129–136. \| Download	November 2009
J. Kurth, C. Loftin, J. Zydlewski and J. Rhymer. 2007. PIT tag effectiveness for freshwater mussel recaptures. Journal of the North American Benthological Society 26:253-260.	April 2007
J. Kurth, C. Loftin, J. Zydlewski and J. Rhymer (2007) PIT tag effectiveness for freshwater mussel recaptures. Journal of the North American Benthological Society 26(2):253?260 \| Download	April 2007
Izzo, L., and Zydlewski, J. (2017) Retrospective analysis of seasonal ocean growth rates of 2SW Atlantic Salmon in Downeast Maine using historic scales. Marine and Coastal Fisheries. 9:1, 357-372, DOI: 10.1080/19425120.2017.1334723 \| Download	July 2017
Izzo, L., Maynard, G.A., and Zydlewski, J. (2016) Upstream movements of Atlantic Salmon in the lower Penobscot River, Maine following two dam removals and fish passage modifications. Marine and Coastal Fisheries, 8(1): 448-461. DOI: 10.1080/19425120.2016.1185063 \| Download	July 2016
Hunter, M., Burns, C., P. deMaynadier, L. Incze, W. Krohn, P. Vaux, and B. Vickery. 2009. Biodiversity, Pages 30-34 in G. L. Jacobson, I. J. Fernandez, P. A. Mayewski, and C. V. Schmitt (editors). Maine’s Climate Future: An Initial Assessment. A Report for the Governor of Maine. University of Maine, Orono, 70 pp.	May 2009
Hudson, J., J. Johnson, J. Hogle., J Brunzell and J. Zydlewski (2008) Rapid seaward migration of Coastal cutthroat trout in the Columbia River. Proceedings of the 2005 Coastal Cutthroat Trout Symposium. \| Download	April 2008
Hoving, C. L., R. A. Joseph, and W. B. Krohn. 2003. Recent and historical occurrences of Canada lynx in Maine and the Northeast. Northeastern Naturalist, 10 (4): 363-382.	December 2003
Hoving, C. L., D. J. Harrison, W. B. Krohn, W. J. Jakubas, and M. A. McCollough. 2004. Canada lynx LYNX CANADENSIS habitat and forest succession in northern Maine, USA. Wildlife Biology, 10(4): 285-294	May 2004
Hoving, C. L., D. J. Harrison, W. B. Krohn, R. A. Joseph, and M. O'Brien. 2005. Broad-scale predictors of Canada lynx occurrence in eastern North America. Journal of Wildlife Management, 69(2): 739-751.	June 2005
Homyack, J. A., D. J. Harrison, and W. B. Krohn. 2007. Effects of precommercial thinning on snowshoe hares in Maine. Journal of Wildlife Management, 71 (1): 4-13.	February 2007
Homyack, J. A., D. J. Harrison, and W. B. Krohn. 2005. Long-term effects of precommercial thinning on small mammals in northern Maine. Forest Ecology and Management, 205: 43-57.	August 2005
Homyack, J. A., D. J. Harrison, and W. B. Krohn. 2004. Structural differences between precommercially thinned and unthinned conifer stands. Forest Ecology and Management, 194 (1-3): 131-143.	May 2004
Homyack, J. A., D. J. Harrison, J. A. Litvaitis, and W. B. Krohn. 2006. Quantifying densities of snowshoe hares in Maine using pellet plots. Wildlife Society Bulletin, 34 (1): 74-80.	February 2006
Holbrook, C., M. Kinnison and J. Zydlewski. 2011 Survival of migrating Atlantic salmon smolts through the Penobscot River, Maine, USA: A pre-restoration assessment. Transactions of the American Fisheries Society 140(5): 1255-1268. \| Download	September 2011
Holbrook, C., J. Zydlewski, M. Kinnison, Gorsky, D., and S. Shephard (2009) Movements of pre-spawn adult Atlantic salmon near hydroelectric dams in the lower Penobscot River, Maine. North American Journal of Fisheries Management.	April 2009
Hogg, R., Coghlan., Jr., Zydlewski, J. and Simon, K. (2014) Anadromous sea lamprey Petromyzon marinus serve as ecosystem engineers in a coastal spawning tributary. Freshwater Biology. Freshwater Biology, 59(6), 1294-1307. \| Download	April 2014
Hogg, R., Coghlan Jr., S. and Zydlewski, J. (2013) Anadromous sea lamprey (Petromyzon marinus) recolonize a coastal river tributary after dam removal. Transactions of the American Fisheries Society. 142(5):1381-1394. \| Download	September 2013
Hogg, R., Coghlan Jr., S. Zydlewski, J., and Gardner, C. (2015) Fish Community Response to a Small-Stream Dam Removal in a Maine Coastal River Tributary. Transactions of the American Fisheries Society 144(3), 467-479. \| Download	May 2015
Hill, M., G. Zydlewski, J. Zydlewski, J. Gasvoda (2006) Development and evaluation of portable PIT tag detection units: PITpacks. Fisheries Research. 77:102-109. \| Download	January 2006
Hepinstall, J. A., S. A. Sader, and W. B. Krohn. 2002. Chapter 53 - Effects of niche width on the performance and agreement of avian habitat models. Pages 593-606 IN Scott, J. M., P. J. Heglund, M. Morrison, J. B. Haufler, M. G. Raphael, W. A. Wall, and F. B. Samson (editors). Predicting species occurrences: issues of scale and accuracy. Island Press, Corvalis, OR. 868 pp.	January 2002
Hepinstall, J. A., S. A. Sader, W. B. Krohn, R. B. Boone, and R. I. Bartlett. 1999. Development and testing of a vegetation and land cover map of Maine. Maine Agricultural and Forest Experiment Station, Technical Bulletin 173, University of Maine, Orono. 104 pp.	November 1999
Hamilton S.L., Murphy C.A., Johnson S.L. and Pollock A. 2022. Water quality ramifications of temporary drawdown of Oregon reservoirs to facilitate juvenile Chinook salmon passage. https://doi.org/10.1080/10402381.2021.2017082 \| Publisher Website	January 2022
Guyette, M.Q., C.S. Loftin, and J. Zydlewski. (2013) Carcass analog addition enhances juvenile Atlantic salmon (Salmo salar) growth and condition.Canadian Journal of Fisheries and Aquatic Sciences 70:860-870. http://www.nrcresearchpress.com/doi/abs/10.1139/cjfas-2012-0496#.UbcWlZyX33A \| Download	June 2013
Guyette, M.Q., C.S. Loftin, J. Zydlewski, and R.Cunjak. 2014. Carcass analogues provide marine subsidies for macroinvertebrates and juvenile Atlantic salmon in temperate oligotrophic streams. Freshwater Biology 59:392-406. \| Download	March 2014
Grote, A., Bailey, M., and Zydlewski, J. (2014) Migration and spawning behavior of American shad in the Penobscot River Maine. Transactions of the American Fisheries Society 143:552-563. \| Download	March 2014
Grote, A., Bailey, M., Zydlewski, J., Hightower, J. 2014 Multibeam sonar (DIDSON) assessment of American shad (Alosa sapidissima) approaching a hydroelectric dam. Canadian Journal of Fisheries and Aquatic Sciences 71:545-558. \| Download	November 2013
Gorsky, D., Zydlewski, J. and Basely, D. (2012) Characterizing seasonal and diel vertical movement and habitat use of lake whitefish (Coregonus clupeaformis) in Clear Lake, Maine. Transactions of the American Fisheries Society. \| Download	May 2012
Gorsky, D., J. Trial, J. Zydlewski, J. McCleave (2009) The Effects of Smolt Stocking Strategies on Migratory Path Selection of Adult Atlantic Salmon in the Penobscot River, Maine. North American Journal of Fisheries Management 29:949-957. \| Download	June 2009
Gilligan, E., Stich, D., Mills, K., Bailey, M., Mills, K., and Zydlewski, J. (accepted) Climate change may cause shifts in growth and instantaneous natural mortality of American Shad throughout their native range. \| Download	May 2021
Gerth, W.J., Murphy, C.A., and Arismendi, I. 2023. Caddisfly dives for oviposition: Record-shattering depths and poor life choices in a dammed river system. Freshwater Science. https://doi.org/10.1086/724053	January 2023
Gerth W., Li J., Van Driesche, R., Murphy C., Ganio L. and Skaugset A. 2022. Local and sub-basin effects of timber harvests on stream macroinvertebrates in Hinkle Creek watershed. https://doi.org/10.1016/j.foreco.2021.119923 \| Publisher Website	February 2022
Gardner, C. Coghlan, S., Zydlewski, J., and Saunders, R. (2011) Distribution and abundance of stream fishes in relation to barriers: Implications for monitoring stream recovery after barrier removal. River Research and Applications. DOI: 10.1002/rra.1572 \| Download	June 2011
Gardner, C. Coghlan, S., Zydlewski, J. (2012) Distribution and Abundance of Anadromous Sea Lamprey Spawners in a Fragmented Stream: Current Status and Potential Range Expansion Following Barrier Removal. Northeastern Naturalist 19(X):00-00. \| Download	January 2012
G. Zydlewski, G. Horton, T. Dubreuil, B. Letcher, J. Zydlewski, S. Casey. (2006) Monitoring of fish in small streams: A unified approach using PIT tags. Fisheries 31(10):492-502 \| Download	October 2006
Frost, H., and W. Krohn. 2004. Chapter 13 - Postnatal growth and development in fishers. Pages 254-263 IN D. J. Harrison, A. K. Fuller, and G. Proulx (editors). Martens and fishers (MARTES) in human altered environments: an international perspective. Springer, New York, NY. 279 pp.	September 2004
Frost, H. C., and W. B. Krohn, E. A. Bezembluk, R. Lott, and C. R. Wallace. 2005. Prenatal development in fishers (MARTES PENNANTI). Theriogenology, 63(5): 1440-1453.	August 2005
Flye, M., Sponarski, C., McGreavy, B., and Zydlewski, J. (2024) Does Leadership have a role in collaborative environmental governance? People and Nature. Journal of Environmental Management, 348, 119203. DOI: 10.1016/j.jenvman.2023.119203	July 2024
Flye, M., Sponarski, C., Zydlewski, J. and McGreavy, B. (2021) Understanding collaborative governance from a communication network perspective: A case study of the Atlantic salmon recovery framework. Environmental Science and Policy. 115 (2021): 79-90. DOI: 10.1016/j.envsci.2020.10.001 \| Abstract	January 2021	The Atlantic Salmon population in Maine remains critically low despite hatchery supplementation and habitat improvement efforts. In 2000 the Gulf of Maine Distinct Population Segment was listed as an endangered species, with joint listing authority shared by the National Oceanic and Atmospheric Administration and the United States Fish and Wildlife Service. Complexity surrounding leadership is a challenge common in fisheries management. Because regulators and managers from federal, state, and Penobscot Nation contexts operate with independent authorities, recovery decisions depend upon effective communication and coordination. Using a mixed-methods approach, we surveyed and interviewed members of the Atlantic Salmon Recovery Framework (ASRF), the governance structure responsible for Atlantic Salmon management and recovery in Maine. The Communication Network Analysis (CNA) used survey results to better understand the flow of information and communication among members of ASRF. Survey and interview results revealed three areas of concern: 1) slow and ineffective decision-making, 2) confusion surrounding leadership and accountability, and 3) lack of adaptive capacity. Despite these challenges, ASRF members reported a commitment to maintaining a collaborative governance structure. Individuals reported long-standing relationships and a history of working together within and among organizations. This coupled with the high degree of current communication shows that transmission pathways exist and may be built upon over time. As management organizations work to restructure the ASRF, the following considerations may serve to improve collaborative efficiency: 1) encouraging inter-agency collaborations within Boards and Teams, 2) alignment of ASRF and organizational decision-making and power structures, 3) formalizations of information flow and 4) formalization of the program implementation process. As more species become threatened/endangered and management resources become scarcer, the need to work collaboratively across jurisdictions will become increasingly essential to environmental management and recovery. Understanding collaborative governance structures from a structural perspective may provide a means to assessing collaborative efficiency and highlighting areas for improvement.
Figueroa-Muñoz, G., Olivos, J.A., Arismendi, I., Fabiano, G., Laporta, M., Silveira, S., González-Bergonzoni, I., Pavez, G., Ernst, B., Ciancio, J.E., Harrod, C., Di Prinzio, C.Y., Chalde, T., Murphy, C.A., and Gomez-Uchida, D. Contemporary distribution of non-native Chinook salmon (Oncorhynchus tshawytscha) in South America. Biological Invasions. https://doi.org/10.1007/s10530-023-03083-7	May 2023
Fiedler, C. E., and S. T. McKinney. Forest structure, health, and mortality in two Rocky Mountain whitebark pine ecosystems: Implications for restoration. \| Download	July 2014
Fernandes, S.J., G.B. Zydlewski, M.T. Kinnison, J.D. Zydlewski, G.S. Wippelhauser. (2010). Seasonal Distribution and Movements of Atlantic and Shortnose Sturgeon in the Penobscot River Estuary, Maine. Transactions of the American Fisheries Society 139:1436-1449. \| Download	September 2010
Eberhardt, E., Murphy, C.A., Gerth, W., Konstantinidis, P., and Arismendi, I. Documenting historical anchorworm parasitism of introduced warmwater fishes in the Willamette River Basin, Oregon. Northwest Science 97:2.	June 2024
Dionne, P., Zydlewski, G., Kinnison, M., Zydlewski, J., and Wippelhauser, G. (2013) Reconsidering residency: Characterization and conservation implications of complex migratory patterns of shortnose sturgeon, Acipenser brevirostrum. Canadian Journal of Fisheries and Aquatic Sciences. 70: 119–127. \| Download	January 2013
Brehm, A., Mortelliti, A., Maynard, G., and Zydlewski, J. (2019) Land-use change and the ecological consequences of personality in small mammals. Ecology Letters. DOI: 10.1111/ele.13324 \| Download	January 2019
Boone, R. B., and W. B. Krohn. 2002. Introduction to Part 3 - Modeling tools and accuracy assessment. Pages 265-270 IN Scott, J. M., P. J. Heglund, M. Morrison, J. B. Haufler, M. G. Raphael, W. A. Wall, and F. B. Samson (editors). Predicting species occurrences: issues of scale and accuracy. Island Press, Corvalis, OR. 868 [invited contribution].	January 2002
Boone, R. B., and W. B. Krohn. 2000. The vegetation transition zone and bird ranges in Maine. Journal of Biogeography 27:471-482.	January 2000
Boone, R. B., and W. B. Krohn. 2000. Predicting broad-scale occurrences of vertebrates in patchy environments. Landscape Ecology 15(1): 63-74.	January 2000
Boone, R. B., and W. B. Krohn. 2000. Particitioning sources of variation in vertebrate species richness. Journal of Biogeography 27:457-470.	January 2000
Blomquist, S., Zydlewski, J., Hunter Jr., M. (2008) Efficacy of PIT tags for tracking the terrestrial anurans Rana pipiens and Rana sylvatica. Herpetological Review	September 2008
Begley, M., Coghlan, Jr., and Zydlewski, J. (2018) Sensitivity of white sucker (Catostomus commersonii) age-structure to commercial harvest. Journal of Freshwater Ecology. 33:1, 413-428, DOI: 10.1080/02705060.2018.1496951 \| Download	November 2018
Begley, M., Coghlan, Jr., and Zydlewski, J. (2017) A comparison of age, size, and fecundity of harvested and intact White Sucker (Catostomus commersoni) populations in Maine. North American Journal of Fisheries Management 37:510–523. DOI: 10.1080/02755947.2017.1290719 \| Download	April 2017
Barringer, L. E., D. F. Tomback, M. B. Wunder, and S. T. McKinney. 2012. Relative health of whitebark pine and cone production as predictors of visitation by Clark’s Nutcracker. PLoS ONE. \| Download \| Publisher Website	May 2012
Barber, B., Gibson. J., O’Malley, A., and Zydlewski, J. (2018) Does what go up also come down? Balancing recruitment with nutrient budget for alewife (Alosa pseudoharengus). Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 10:236–254, DOI: 10.1002/mcf2.10021 \| Download	May 2018
Bailey, M. and Zydlewski, J. (2013) Assessing restoration of an extant population of American shad with supplemental stocking. North American Journal of Fisheries Management 33:459-467 \| Download	January 2013
Bahn, V., W. B. Krohn, and R. J. O'Connor. 2008. Dispersal leads to spatial autocorrelation: a simulation model. Ecological Modelling 213: 285-292.	January 2008
Bahn, V., R. J. O'Connor, and W. B. Krohn. 2006. Importance of spatial autocorrelation in modeling bird distributions at a continental scale. Ecography, 29 (6): 835-844.	November 2006
Bahn, V., R. J. O'Connor, and W. B. Krohn. 2006. Effect of dispersal at range edges on the structure of species ranges. Oikos, 115 (1): 89-96.	October 2006
Altenritter, M., Kinnison, M., Zydlewski, G., Wippelhauser, G. and Zydlewski, J. (2017). Movements and demography of shortnose sturgeon in the Kennebec and Penobscot Rivers, Maine. Canadian Journal of Fisheries and Aquatic Sciences. Published on the web 9 May 2017, https://doi-org.prxy4.ursus.maine.edu/10.1139/cjfas-2017-0083	May 2017
Altenritter, M., Kinnison, M., Zydlewski, G., Secor, D., and Zydlewski, J. (2015). Dorsal scute microchemistry: a new tool for reconstructing habitat use of shortnose sturgeon. Environmental Biology of Fishes. 98(12):2321-2335 \| Download	August 2015
Allen, D.C., Larson, J., Murphy, C.A., Garcia, E.A., Anderson, K.E., Busch, M.H. et al. (2024) Global patterns of allochthony in stream–riparian meta-ecosystems. Ecology Letters, 27, e14401.	March 2024
Ahn, S., W. B. Krohn, A. J. Plantinga, T. J. Dalton, and J. A. Hepinstall. 2002. Agricultural land change in Maine: a compilation and brief analysis of Census of Agriculture data, 1850-1977. Maine Agricultural and Forest Experiment Station, Technical Bulletin 182, University of Maine, Orono. 31 pp.	March 2002
Zydlewski, J., Coghlan. Jr., S., Dillingham, C., Figueroa-Muñoz, G., Merriam, C., Smith, S., Smith, R., Stich, D., Vogel, S., Wilson, K., and Zydlewski, G. (2023) Seven dam challenges for migratory fish: insights from the Penobscot River. Frontiers in Ecology and Evolution. 11, 1253657. DOI: 10.3389/fevo.2023.1253657	October 2023
Gorsky, D. and Zydlewski, J. (2013) Evaluation of size dependant predation rates and efficiency of adult post-spawned rainbow smelt (Osmerus mordax) on larval lake whitefish (Coregonus clupeaformis) in a laboratory setting. Transactions of the American Fisheries Society 33(1):163-169. \| Download	January 2013

Presentations

Presentations	Presentation Date
Zydlewski,J., Letcher, B., O'Donnell, M., Dubreuil, T., and Conner, B. (2007) Movements of brook trout in Stanley Brook, a small coastal stream in Maine. 137th Annual Meeting of the American Fisheries Society. San Francisco, CA. September 2-6.	September 2007
Zydlewski, J., and Zydlewski, G. (2021) Where do Maine Atlantic Sturgeon go in the winter? 151^st Annual Meeting of the American Fisheries Society. Baltimore, MD. November 6.	November 2021	Atlantic Sturgeon of the Gulf of Maine (GOM) are federally listed as threatened because of the lack of information from the region, particularly their annual habitat use patterns. We sought to identify where Atlantic Sturgeon in the GOM go during the winter months (a priority for recovery).
Zydlewski, J., and Zydlewski, G. (2012) Understanding the migratory fish species of Maine-visions of recovery. Penobscot Fly Fishing Club, Bangor, ME. February 1. INVITED, PRESENTED.	February 2012	Synopsis of ongoing regional research by the Coop Unit
Zydlewski, J., and Stich, D. (2014) Hard choices in assessing survival past dams using telemetry. 2014 Atlantic Salmon and Their Ecosystems Forum, University of Maine, Orono. January 8. PRESENTED.	January 2014	Survival analysis at dams using mark recapture can have bias corrected through a "paired release"-but this has the mathematical cost of error inflation. The conditions under which this technique effectively balance bias and error were modeled.
Zydlewski, J., Zydlewski, G., Gale, W., and Kennedy, B. (2013) Smolting in Coastal Cutthroat Trout. 9th International Smolt Symposium, University of Holar, Iceland. August 15.	July 2013	This presentation dealt with nearly ten years of data associated with migrating coastal cutthroat trout in Washington State
Zydlewski, J., Vogel, S., and Stich, D. (2021) Scaling fish passage assessment; it’s not just a local matter. 151^st Annual Meeting of the American Fisheries Society. Baltimore, MD. November 6.	November 2021	There is a fundamental mismatch between the estimation of fish survival at a dam and the assessment of dam related impacts on a population.Regardless of challenges, the entire life history may be most appropriate scale of impact analysis to inform decisions.
Zydlewski, J., Stich, D., and Sigourney, D. (2013) Making the connection between freshwater production and the black box. Meeting of the Marine Estuary Action Team Atlantic salmon framework meeting. Augusta Maine. July 17.	July 2013	Critical assessment of known unknowns in salmon restoration
Zydlewski, J., Stich, D., and Sigourney, D. (2013) Understanding the impacts of dams on up and downstream passage - lessons from Atlantic salmon in the Penobscot River. Oral presentation to the USFWS Craig Brook Fisheries Complex Seminar Series. INVITED, PRESENTED. January 15.	January 2013	Summary of 8 years of salmon research in the GOM.
Zydlewski, J., Stich, D., Roy, S., Sheehan, T., Sprankle, K., Bailey, M. (2022) What have we lost? American shad’s impounded history. 2022 Oregon Chapter of the American Fisheries Society, 58th Annual Meeting. March 2. Virtual.	March 2022	To assess the impact of dams, we estimated the historically accessed spawning habitat in coastal rivers (485,618 river segments with 21,113 current dams) based on (i) width, (ii) distance from seawater, and (iii) slope (to exclude natural barriers to migration) combined with local knowledge.<br>Estimated habitat available prior to dam construction (2,752 km<sup>2</sup>) was 41% greater than current fully accessible habitat (1,639 km<sup>2</sup>).
Zydlewski, J., Schaffler, J., O’Donnell, M., Dubreuil, T., and Letcher, B. (2015) Linking brook trout movement and otolith microchemistry in a coastal Maine system 145th Annual Meeting of the American Fisheries Society. Portland Oregon. August 16-20 INVITED, PRESENTED.	August 2015	Brook trout movements were studied in Stanley Brook, a small, oligotrophic, and coastal stream on the southern end of Mount Desert Island, Maine. Otoliths were extracted from these fish for trace element analysis using a high resolution ICP-MS coupled to laser ablation system.
Zydlewski, J., Santavy, P., Firmenich, A., Kocik, J., and Lipsky, C. (2011) Preliminary results of an imprinting and estuary release stocking method. Maine Conservation and Hatchery Assessment Team Meeting, Craig Brook National Fish Hatchery, East Orland, Maine. June 30. INVITED, PRESENTED.	June 2011
Zydlewski, J., Molina-Moctezuma (2018) Understanding fish passage in a changing system- lessons from restoration efforts in the Penobscot River. 2018 Maine Sustainability & Water Conference. March 29. Augusta Civic Center, Augusta, Maine.	March 2018	The historic removal of two main-stem dams and building of a nature-like upstream bypass at the next dam upstream (40+ km) in the Penobscot River has fundamentally changed connectivity in this system. we explore challenges we have encountered related to 1) attribution of migratory motivation, 2) handling effects, 3) assumptions of representative sampling 4) the complexity of history-dependent mortality, and 5) influences outside of the river system. We use specific research examples to inform
Zydlewski, J., Mensinger, M., Molina-Moctezuma, A., Murphy, J., Payne Wynne, M., Peterson, E., Rubenstein, S., and Vogel, S. Fish Passage in a Changing System - How Bioengineering and Policy Are Shaping the Ecology of the Penobscot River. 149th Annual Meeting of the American Fisheries Society. Reno Nevada. September 29.	September 2019	The Penobscot River Restoration Project resulted in the recent removal of two main-stem dams and building of a nature-like bypass channel at the next upstream dam. This has fundamentally changed river connectivity and policy challenges.
Zydlewski, J., McCormick, S., Kunkel, J., Shrimpton, M., Osmoregulation and Migration in American shad; when to go and how they know. Invited Speaker, Wildlife Ecology Seminar Series. January 24, 2005.	January 2005
Zydlewski, J., Maynard, G., Molina-Moctezuma, A., Stich, D., and Zydlewski, G. (2018) Understanding fish passage in a changing system- lessons from restoration efforts in the Penobscot River. 74th Annual Northeast Fish & Wildlife Conference. April 15. Burlington, Vermont.	April 2018	The historic removal of two main-stem dams and building of a nature-like upstream bypass at the next dam upstream (40+ km) in the Penobscot River has fundamentally changed connectivity in this system. We draw on more than a decade of data collected on shortnose sturgeon, Atlantic salmon, American shad, and American eel where we have assessed species and life-stage specific behaviors and estimated survival of these migratory fishes through the up and downstream gauntlet of obstacles they face.
Zydlewski, J., Kocik, J., Fernandes, S., and Hawkes, J. (2008) Patterns of movement in striped bass, Morone axatilis in the Penobscot Ribver, Maine. 138th Annual Meeting of the American Fisheries Society. Ottawa, Canada. August 17-21. PRESENTED	August 2008
Zydlewski, J., Johnson, J., Clements, S., Karnowski, M., Schreck, C., Zydlewski, G. (2005) Movements of Coastal Cutthroat Trout (Oncorhynchus clarki) in the Lower Columbia River Abstract and Presentation at the Atlantic International Chapter of the American Fisheries Society Annual Meeting, September 19-21, Fairlee, Vermont.	September 2005
Zydlewski, J., Izzo, L., and Maynard, G. (2016) The fate of hatchery-spawned Atlantic Salmon released into the Penobscot River, ME. Maine146th Annual Meeting of the American Fisheries Society. Kansas City, MO. August 23.	August 2016	Endangered Maine Atlantic Salmon are the focus of restoration efforts including hatchery supplementation using sea-run broodstock. In 2015 we sought to better characterize post-release behavior by surgically radio tagging 56 artificially spawned sea-run adults and tracking them through the following spring.
Zydlewski, J., Hughes, E., and Cox, O. (2010) Atlantic Salmon in the Penobscot River- Delays, Passage and Visions of Restoration. The 9th International Congress on the Biology of Fishes. Barcelona, Spain, 5-9 July. PRESENTED, INVITED.	July 2010
Zydlewski, J., Heres, B., Maynard, G., Molina-Moctezuma, A., Stich, D., and Zydlewski, G. (2017) Understanding fish passage in a changing system- lessons from restoration efforts in the Penobscot River. 147th Annual Meeting of the American Fisheries Society. Tampa, FL. August 20.	August 2017	We draw on more than a decade of data collected on shortnose sturgeon, Atlantic salmon, American shad, and American eel where we have assessed species and life-stage specific behaviors and estimated survival of these migratory fishes through the up and downstream gauntlet of obstacles they face.We will also communicate lessons learned through this experience that can be applied to similar efforts in other systems.
Zydlewski, J., Grote,A., Bailey,M., and Hightower, J. (2013) Penobscot River American shad; who’s here and who cares? Poster presentation to DSSRN, January 10.	January 2013	Assessment of American shad presence and movements in the River.
Zydlewski, J., Firmenich, A., Santavy, P., Lipsky, C., Hawkes, J., Kocik, J. (2012) Assessing the direct stocking of imprinted smolts into the Penobscot River Estuary. 2012 Forum, Atlantic Salmon and their Ecosystems, Bangor Maine January 10-11. PRESENTED.	January 2012
Zydlewski, J., Firmenich, A., Kocik, J., Lipsky, C. (2011) Preliminary results of an imprinting and estuary release stocking method. Maine Conservation and Hatechery Assessment Team Meeting, Craig Brook National Fish Hatchery, East Orland, Maine. June 30. INVITED, PRESENTED.	June 2011
Zydlewski, J., D. Stich, and D. Sigourney (2012) Understanding impacts of dams on up and downstream passage- lessons from Atlantic salmon in the Penobscot River. Oral presentation at the 142nd Annual Meeting of the American Fisheries Society, Minneapolis-St. Paul, MN.	August 2012
Zydlewski, J., C.M. Holbrook, D. Gorsky and M.T. Kinnison (2006) Passage of Adult Atlantic Salmon at the Lower Dams on the Penobscot River. Maine Atlantic Salmon Technical Advisory Committee Meeting. Maine Atlantic Salmon Commission, Bangor, Maine January 17.	January 2007
Zydlewski, J., Blomberg, E., and Job, K. (2018) Dam influences on habitat use and migratory survival of American Eel in the Penobscot River, Maine. 148th Annual Meeting of the American Fisheries Society. Atlantic City, New Jersey. August 20.	August 2018	In the Penobscot River, Maine, main-stem dams (e.g., West Enfield and Milford Dams; river km 99 and 62) remain sites of American eel passage concern. Dams impede the upstream juvenile migration but successful migrants may face significant life history costs.
Zydlewski, J., Bailey, M., Roy, S. Sheehan, T. Sprankle, K., Stich, D. (2020) What have we lost? American shad’s impounded history. 150th Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 30.	August 2020	Since the early 1800s, dams have greatly reduced access to spawning habitat for American shad. Our model suggests that even with extensive fish passage, dams represent a fixed population constraint of 37 % coastwide.
Zydlewski, J., Bailey, M. Roy, S., Sheehan, T., Sprankle, K., and Stich, D. (2019) What have we lost? American shad’s impounded history. 149th Annual Meeting of the American Fisheries Society. Reno Nevada. September 29.	September 2019	The construction of dams has greatly reduced access to spawning and nursery grounds for American shad, thereby limiting the scope for population growth. To estimate the opportunity cost realized by this species through dam construction, we sought to estimate habitat historically exploited in Atlantic coastal rivers.
Zydlewski, J., Bailey, M. Roy, S., Sheehan, T., Sprankle, K., and Stich, D. (2019) Influence of Impoundments on American shad recovery. Atlantic States Marine Fishery Commission (webinar). March 24.	March 2020	Since the early 1800s, dams have greatly reduced access to spawning habitat by American shad. Our model suggests that even with extensive fish passage, dams represent a fixed population constraint of 37 % coast wide.
Zydlewski, J. and Stich, D. (2014) Hard Choices in Assessing Survival Past Dams Using Telemetry. 144th Annual Meeting of the American Fisheries Society. Québec City, Canada. August 17-21.	August 2014	Mark recapture models are widely used to assess survival of migrating salmon smolts past dams. We modeled an idealized system with a single dam to assess the tradeoff between SE and bias.
Zydlewski, J. and Basley, D. Movements of Lake Whitefish in Clear Lake, Maine. Presented at the 29th Annual Meeting of the Atlantic International Chapter of the American Fisheries Society, 2005, Rangeley, Maine.	October 2005
Zydlewski, J. Sigourney, D and Stich, D. (2014) Hard Choices in Assessing Survival Past Dams Using Telemetry. NOAA National Hydropower Program Meeting. Gloucester, MA. July 9. INVITED, PRESENTED.	July 2015	Passage assessment using mark recapture balances precision and accuracy. Tradeoffs for two methods was presented.
Zydlewski, J. , Zydlewski G., Kennedy, B., and Gale, W. (2011) Smolting in coastal cutthroat trout? 141th Annual Meeting of the American Fisheries Society. Seattle, Washington. September 4-9.INVITED, PRESENTED.	September 2011
Zydlewski, J. (2020) The state of passage for Atlantic salmon in the Penobscot River., Penobscot River Salmon Habitat Recovery Unit Meeting. Mitchell Center, University of Maine. Orono, ME. March 12.	March 2020	Presented on the state of knowledge for Atlantic salmon fish passage in the Penobscot River. This information contributed to decision-making for identification of regional management priorities.
Zydlewski, J. (2020) Science for comfort or conservation- how do we inform and avoid action on fish passage? 2019 Atlantic Salmon Ecosystems Forum. January 14. University of Maine, Orono, Maine.	January 2020	For more than a decade and a half, I have been part of effective collaborations with NOAA, USFWS, PIN, MDMR, UMO and hydropower companies to inform questions of passage for both adult and juvenile Atlantic salmon in the Penobscot River. Because no amount of research can move the species to recovery without influencing management actions, it is worthwhile to reflect, as a community of stakeholders, on the degree to which some research efforts have been integrated or ignored.
Zydlewski, J. (2017) Track-2 NEST and Dams: Overview of the New England Sustainability Consortium (NEST) and its Safe Beaches and Shellfish project and the new Future of Dams project. 2017 Maine EPSCoR State Conference, University of Maine, Orono May 23. PRESENTED.	May 2017	Project overview for UMaine EPSCOR Project
Zydlewski, J. (2017) Fish and Dams. USFWS Craig Brook Seminar Series. May 25. INVITED, PRESENTED.	May 2017	Presentation on the influence of dams to partners.
Zydlewski, J. (2017) Fish and Dams. Ontario Ministry of Natural Resources and Forestry, Great Lakes Management Unit Conference, Geneva Park Ramara, Ontario Canada. April 5. INVITED, PRESENTED.	April 2017	Presentation considered six ways in which dams may influence fish populations. Examples are drawn from the Penobscot River.
Zydlewski, J. (2017) Fish and Dams. Maine Association of Wetland Scientists (MAWS) Annual Winter Conference, Bowdoin College, Brunswick, Maine. March 23. INVITED, PRESENTED.	March 2017	Presentation considered six ways in which dams may influence fish populations. Examples are drawn from the Penobscot River.
Zydlewski, J. (2017) Fish and Dams. Bristol Mills Town Meeting, Maine. May 9. INVITED, PRESENTED.	May 2017	Presentation to stakeholders on the biological influence of dams .
Zydlewski, J. (2017) Fish and Dams- Understanding our impounded legacy. Senator George J. Mitchell Center for Sustainability Solutions Lecture Series, University of Maine, Orono Maine. April 3. INVITED, PRESENTED.	April 2017	Presentation considered six ways in which dams may influence fish populations. Examples are drawn from the Penobscot River.
Zydlewski, J. (2016) Restoration of Migratory Fish to the Penobscot River Maine Chapter of the Appalachian Mountain Club Seminar Series, Fields Pond Audubon Center, Orrington ME, April 14.	April 2016	Presentation is the synopsis of field work on the Penobscot River before and after dam removals. Patterns of passage at dams are considered.
Zydlewski, J. (2016) Fish and Dams. UNH American Fisheries Society Seminar Series. University of New Hampshire, Durham, NH. November 28. INVITED, PRESENTED	November 2016	Presentation considered six ways in which dams may influence fish populations. Examples are drawn from the Penobscot River.
Zydlewski, J. (2016) Fish and Dams. St. John River Watershed International Cross-Boundary Riverside Resort and Conference Centre, Fredericton, New Brunswick, Canada (via webinar). November 1. INVITED, PRESENTED.	November 2016	Presentation considered six ways in which dams may influence fish populations. Examples are drawn from the Penobscot River.
Zydlewski, J. (2015) Structured Decision Making – applications and for management. University of Maine American Fisheries Society Sub-Unit, University of Maine, Orono. January 27. INVITED	January 2015	Discussed the application of SDM in fisheries management
Zydlewski, J. (2013) Restoration of the Penobscot River- facts, fish and fantasy. University of New Brunswick Biology Seminar Series. INVITED, PRESENTED. November 22.	November 2013	This presentation will consider the changes on the Penobscot River as the Penobscot River Restoration Project continues. These changes will likely affect different migratory fishes and their life history stages in different ways.
Zydlewski, J. (2009) Migration studies in the Penobscot River. Veazie Salmon Club. January 22. INVITED, PRESENTED	January 2009
Zydlewski, J. (2008) Sea-run brook trout and striped bass- characterizing connectivity with the sea. Maine Sea Grant Policy Advisory Committee. June 5. INVITED, PRESENTED.	June 2008
Zydlewski, J. (2012) Migratory fish in the Penobscot River. Veazie Salmon Club, Veazie, ME. April 5. INVITED, PRESENTED.	April 2012
Zydlewski, J, Johnson J, Zydlewski, G (2005) Cutthroat trout (Oncorhynchus clarki) in the Lower Columbia River: migration and residency Presented at the Coastal Cutthroat Trout Symposium: Biology, Status, Management, and Conservation 2005; Fort Worden State Park, Washington	October 2005
Zydlewski, J, Johnson J, Hogle,J, Brunzell, J, Clements, S, Karnowski, M, Schreck, C. Seaward migration of coastal cutthroat trout (Oncorhynchus clarki) from four tributaries of the Columbia River. Presented at the Coastal Cutthroat Trout Symposium: Biology, Status, Management, and Conservation 2005; Fort Worden State Park, Washington	October 2005
Zydlewski, J and Coghlan, S (2012) Fisheries Science at the University of Maine. Oral presentation to Maine Department of Inland Fisheries Commissioner. INVITED, PRESENTED, December 3.	December 2012	Provided commissioner an assessment of current and future fisheries research needs.
Zydlewski, G.B., Kinnison, M.T., Dionne, P., Wegener, M., Zydlewski, J., Wippelhauser, G.S. (2010) Understanding Habitat Connectivity For Shortnose Sturgeon: From Ocean To Historic Freshwater Habitat In Maine. The 9th International Congress on the Biology of Fishes. Barcelona, Spain, 5-9 Jul. INVITED.	July 2010
Zydlewski, G., Kinnison, M., Zydlewski, J., Fernandes, S., Dionne, P., Lipsky, C., Kocik, J., Wippelhauser, G. (2008) Assessment of endangered shortnose sturgeon in Maine Rivers ICES Annual Meeting, Halifax, Nova Scotia. September 24. INVITED.	September 2008
Zydlewski, G., J. Zydlewski and S. Lashua (2008) Long-term seawater performance and scale circuli deposition of Atlantic salmon smolts. Atlantic Salmon Research Forum. Orono, ME. January 8.	January 2008
Zydlewski, G. and Zydlewski, J. (2009) Long-term Seawater performance of Atlantic salmon smolts. International Smolt Workshop, Corvallis Oregon August 25. PRESENTED, INVITED	August 2009
Zydlewski, G. and Zydlewski, J. (2008) Long-term Seawater performance of Atlantic salmon smolts. 138th Annual Meeting of the American Fisheries Society. Ottawa, Canada. August 17-21. INVITED.	August 2008
Zydlewski, G. B. M. T. Kinnison, S. Fernandes, P. Dionne, J. D. Zydlewski, T.L. King, C. Lipsky, J. Kocik, G. S. Wippelhauser. (2008) Assessment of endangered shortnose sturgeon in Maine Rivers, International Council for the Exploration of the Sea Annual Science Conference, Halifax, NS; Symposium: Problems and solutions for the assessment, conservation, and restoration of rare, threatened, and endangered fish species 22 - 26 September INVITED.	January 2008
Zydlewski, G, Zydlewski, J and Danner,R (2005) Does descaling impair osmoregulation in seawater challenged Atlantic salmon smolts? Presented at the 29th Annual Meeting of the Atlantic International Chapter of the American Fisheries Society, 2005, Rangeley, Maine.	October 2005
Zydlewski , J. and Barber, B. (2016) Connectivity, aquatic communities and climate change . International St. Croix River Watershed Board Meeting, Public Meeting. Calais, Maine June 14.	June 2016	Presented data on connectivity, aquatic communities and climate change. Implications for the St Croix River were considered.
Zydewski, J., Kocik, J., Fernandes, S. and Hawkes, J. (2009) Patterns of movement in striped bass in the Penobscot River, Maine. 139th Annual Meeting of the American Fisheries Society. Nashville Tennessee. August 30-September 3. PRESENTED.	September 2009
Zydewski, J., Kocik, J., Fernandes, S. and Hawkes, J. (2009) Patterns of movement in striped bass in the Penobscot River, Maine. 139th Annual Meeting of the American Fisheries Society. Nashville Tennessee. August 30-September 3. PRESENTED.	August 2009
Zydewski, J (2009) Recovery of the Penobscot River. Veazie Salmon Club. November 19. PRESENTED, INVITED	November 2009
Zydewski, J and Bailey, M. (2010) American shad in the Penobscot River – choosing management tools. Atlantic Salmon Research Forum. Orono, ME. January 6. PRESENTED, INVITED.	January 2010
Zydewski, J and Bailey, M. (2010) American shad in the Penobscot River – choosing management tools. The Nature Conservancy, Augusta Maine. January 12. PRESENTED, INVITED	January 2010
Zydewski, J (2010) Fitting technology to the question- a tale to tagging and tracking. University of Vermont. January 13. PRESENTED, INVITED.	January 2010
Zydewski, J (2009) Cooperative projects in the Penobscot River NOAA Restoration work in the presentation. Portland Maine, September 16. PRESENTED, INVITED.	September 2009
Zenga, A., Peterson, E., and Zydlewski, J. (2020) Alewife Energetics and its Possible Implications on Fitness2019 Atlantic Salmon Ecosystems Forum. January 14. University of Maine, Orono, Maine.	January 2020	Alewife are a commercially and economically important fish, that expend large amounts of energy during their long migrations to spawning habitat. To better understand how energy use affects fitness in alewife, we captured and sampled fish from the over the course of their spawning migration.
Wilson, C., Kocik, J., and Zydlewski, J. (2021) Assessing the Ability of ARC800 Sensor Fish to Describe Physical Stressors Experienced by Migrating Fish. 151^st Annual Meeting of the American Fisheries Society. Baltimore, MD. November 6.	November 2021	Coastal rivers in the Gulf of Maine harbor a suite of migratory fishes that migrate between rivers and the ocean as juveniles and adults. Our goal was to assess the ARC800 Sensor Fish’s ability to quantify the impacts dams have on fish as they migrate downstream through dam fish ways and turbines.
Wilbur, L., Coghlan, Jr., S. and Zydlewski, J. (2021) Assessing the distribution and abundance of Bridle Shiners in Maine. 151^st Annual Meeting of the American Fisheries Society. Baltimore, MD. November 6.	November 2021	Bridle shiners (<i>Notropis bifrenatus</i>) are one of Maine’s native species of freshwater minnow and are listed as a <i>Species of Special Concern</i> in the State. This project will inform the Maine Department of Inland Fisheries & Wildlife on the status of this species and will provide a foundation for future long-term monitoring of extant bridle shiner populations in the state.
Whittum, K., Zydlewski, J., Coghlan Jr., S., Cruz-Uribe, A. (2021) An assessment of age, growth, and otolith chemistry for White Catfish in the Penobscot River, Maine. 151^st Annual Meeting of the American Fisheries Society. Baltimore, MD. November 6.	November 2021	White Catfish populations are declining in their native range but in coastal rivers in the northeast Atlantic coast, the relative abundance of this species is increasing. The tolerance of this species to moderate salinity, growing presence in the lower Penobscot River and frequent observation at the Milford Dam paint a likely picture of establishing a prominent presence upriver.
Whittum, K., Coghlan, Jr., S., Hayes, D., Zydlewski, J., Kiraly, I., Watson, J. (2020) Fish assemblage response to Dam removal on the Penobscot River, Maine. Atlantic International Chapter of the American Fisheries Society, Virtual Meeting. August 25.	August 2020	Fish assemblages in the Penobscot River were assessed before and after dam removal on the Penobscot River, Maine. Patterns of migratory fish recovery were presented.
Whittum, K., Coghlan Jr., S., Zydlewski, J., Hayes, D., Kiraly, I., and Watson, J. (2020) Changes in fish assemblages following main stem dam removals in the Penobscot River, Maine. 150th Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 30.	August 2020	In Maine, the Penobscot River Restoration Project removed the two lowermost dams on the river and improved fish passage at other dams to help recover declining sea-run fishes and increase resilience of entire ecosystems. To quantify spatial and temporal changes associated with river rehabilitation efforts, fish assemblages were assessed using boat electrofishing surveys (three years each, spring and autumn) prior to dam removal, shortly after removal, and six years post removal (in progress).
Whittum, K., Coghlan Jr., S., Zydlewski, J., and Hayes, D. (2020) Fish community assessment six years following dam removal in the Penobscot River, Maine. 2019 Atlantic Salmon Ecosystems Forum. January 14. University of Maine, Orono, Maine.	January 2020	Removing dams and their impoundments fundamentally changes flow regimes and increases connectivity, with profound effects on fish assemblages. To quantify spatial and temporal changes associated with river rehabilitation efforts, fish assemblage monitoring via boat electrofishinghas been conducted.
Whittum, K., Coghlan Jr., S., Zydlewski, J., Hayes, D. (2020) White catfish are accessing new habitat in the Penobscot River, Maine, following dam removals. 150th Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 30.	August 2020	Captured fish, as well as fish removed at Milford Dam, will provide demographic and growth data to better understand this species within the Penobscot River. Preliminary aging via otoliths indicates those fish intercepted in the Milford fishway are older individuals (median 6), range (5-9) that are relatively large (250-425 mm).
Whittum, K., Zydlewski, J., Coghlan Jr., S., and Hayes, D. (2022) Long term biomonitoring of fish assemblages following large scale habitat restoration efforts in the Penobscot River, Maine. 2022 Atlantic Salmon Ecosystems Forum. January 11. University of Maine, Orono, Maine.	January 2022	The Penobscot River Restoration Project is one of the largest ever completed river rehabilitation projects, culminating in the removal of the two lowermost dams on river and improvements to fish passage on several remaining dams. To quantify spatial and temporal changes associated with river rehabilitation efforts, fish assemblages were surveyed for 3 years prior to dam removal, 3 years after, and now 8 years post dam removal.
Whitaker, D., Hawkes, J., Zydlewski, J., and Sheehan, T. (2016) Do we hit to the target? Evaluation of thermal exposure of river- and hatchery-reared juvenile Atlantic salmon prior to migration on the Narraguagus River, Maine U.S.A. 2016 Atlantic Salmon Ecosystems Forum. January 6-7. University of Maine, Orono, Maine.	January 2016	U.S. Atlantic salmon are at critically low abundance, with remnant populations listed as endangered under the Endangered Species Act. Extensive hatchery supplementation has been used to meet recovery objectives. Unlike naturally–reared fish, the migratory timing of hatchery smolts is limited by stocking date. Our data suggest that some of these fish may have missed their developmental “smolt window” which has been demonstrated to decrease survival during seawater entry.
Weedop, D., Romer, J., Ziller, J. and Murphy, C.A. 2022. Are Mountain Whitefish sentinels of change? Oregon Chapter of the American Fisheries Society Annual Meeting (virtual).	March 2022	We compiled 20 years of upstream passage data, comparing timing among species. We found Mountain Whitefish declined dramatically over the period of study. Our findings suggest that additional studies on Mountain Whitefish populations in Oregon may be important to understanding current and future trends of this native and ecologically relevant species.
Weedop, D., Murphy, C.A. 2022. Community Interactions Within Acadia National Park’s Freshwater Food Webs. Poster presentation to the American Fisheries Society Annual Meeting. Spokane, WA.	August 2022	Food webs can reveal how fish assemblages, including introduced fishes, impact the niches of individual fish species. To investigate potential interactions within Acadia National Park lakes, carbon and nitrogen stable isotopes are being collected from multiple trophic levels in five lentic systems, with a focus on sampling the fish community, prey, and basal resources.
Weaver, D.M., Coghlan Jr., S.M, and Zydlewski, J. (2018) “Closing the Loop”: Anadromous sea lamprey carcasses influence larval conspecifics2017 Atlantic Salmon Ecosystems Forum. January 17. University of Maine, Orono, Maine.	January 2018	Previous work has demonstrated that carcass nutrients increase stream productivity and are incorporated by pre-metamorphic larvae. We examined the sensitivity of life history parameters and influence of sea lamprey carcass nutrients on the age and growth of larval conspecifics with a deterministic stock recruitment model.
Weaver, D.M., Coghlan Jr., S.M, and Zydlewski, J. (2018) “Closing the Loop”: Anadromous sea lamprey carcasses influence larval conspecifics. New York Chapter of the American Fisheries Society Annual Meeting. February 7. Cooperstown, New York at the Otesaga Resort Hotel.	February 2018	Spawning migrations of sea lamprey may serve as vectors of nutrients to freshwater food webs via decomposing carcasses. We examined the sensitivity of life history parameters and influence of carcass nutrients on the age and growth of larval conspecifics with a deterministic stock recruitment model.
Weaver, D., Sigourney, D., and Zydlewski, J. (2020) Forecasting the upstream movement of adult Atlantic salmon. Atlantic International Chapter of the American Fisheries Society, Virtual Meeting. August 25.	August 2020	The timing of migration in fish species is linked to seasonal changes in environmental conditions. We presented a model to forecast eel migration.
Weaver, D., Sigourney, D., Vallee, D., and Zydlewski, J. (2020) A forecasting tool for downstream migrating adult American Eels. 150th Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 30.	August 2020	During downstream migration, American eel face substantial injury and mortality passing through hydroelectric facilities.<br>We constructed an auto-regressive integrated moving average (ARIMA) model that uses historical eel catch data, environmental relationships, and real-time environmental data to forecast silver eel movement.
Weaver, D., Sigourney, D., Delucia, M., and Zydlewski, J. (2020) Forecasting the downstream migration of adult silver phase American eels. 2019 Atlantic Salmon Ecosystems Forum.January 14. University of Maine, Orono, Maine.	January 2020	Beginning in late summer, silver phase eels migrate from freshwater systems out to the Sargasso Sea to spawn. Improved predictions as to the timing and magnitude of eel migrations may inform mitigation actions (e.g., operational shutdowns) to reduce injury and mortality.
Weaver, D., Sigourney, D., Delucia, M., and Zydlewski, J. (2019) Forecasting the downstream migration of adult silver phase American eels. 149th Annual Meeting of the American Fisheries Society. Reno Nevada. September 29.	September 2019	Improved predictions as to the timing and magnitude of eel migrations may inform mitigation actions (e.g., operational shutdowns) to reduce injury and mortality. This work represents a step towards the development of an auto-regressive integrated moving average (ARIMA) forecasting model to predict silver eel movement using forecasted environmental covariates.
Weaver, D., Coghlan, S., and Zydlewski, J. (2014) Anadromous sea lamprey (Petromyzon marinus) as vectors of marine-derived nutrients: implications for dam removal and Atlantic salmon restoration. 2014 Atlantic Salmon and Their Ecosystems Forum, University of Maine, Orono. January 8.	January 2014	The introduction of sea lamprey carcasses has been hypothesized to supplement freshwater communities, but this has not been explicitly evaluated. This work presents data on the influence of carcass input on water chemistry and primary productivity.
Weaver, D., Coghlan, Jr., S., and Zydlewski, J. (2015) Anadromous Sea Lamprey Influence Stream Food Webs in an Atlantic Coastal Stream145th Annual Meeting of the American Fisheries Society. Portland Oregon. August 16-20 INVITED.	August 2015	The role of Sea Lamprey Petromyzon marinus in Atlantic coastal systems is poorly understood. We examined the spatial and temporal dynamics of nutrients from carcasses and influences on primary productivity using nutrient diffusing substrates and assimilation by juvenile Sea Lamprey (ammocoetes), macroinvertebrates, and freshwater mussels using stable isotopes analysis (δ15N and δ13C).
Weaver, D., Coghlan, Jr., S. and Zydlewski, J. (2015) Anadromous sea lamprey influence stream nutrients and primary productivity. 1st Annual University of Maine Freshwater Science Symposium, University of Maine, Orono. January 29.	January 2015	Sea lamprey spawn and die in nutrient poor streams. This nutrient addition in the spring may be critical for fish and invertebrate communities.
Weaver, D., Coghlan Jr., S., and Zydlewski, J. (2017)Sea Lamprey as a Functional Link between Freshwater and Marine Ecosystems Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 22.	March 2017	Historically, freshwater systems were linked to the marine environment by spawning migrations of adult anadromous fishes and subsequent seaward migration of juveniles. . Our findings provide quantitative results as to the ecological role of anadromous Sea Lamprey and underscore the importance of freshwater-marine connectivity to Atlantic coastal streams.
Weaver, D., Coghlan Jr., S., and Zydlewski, J. (2017) “Closing the Loop”: Anadromous sea lamprey carcasses influence larval conspecifics. 147th Annual Meeting of the American Fisheries Society. Tampa, FL. August 20.	August 2017	Spring spawning migrations of anadromous Sea Lamprey Petromyzon marinus occur in Atlantic coastal rivers. Our work demonstrated that nutrient supplementation by conspecifics may increase the overall scope for population growth.
Weaver, D., Coghlan Jr., S., and Zydlewski, J. (2016) Sea Lamprey Carcasses Influence Food Webs in an Atlantic Coastal Stream. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 23.	March 2016	Anadromous Sea Lamprey Petromyzon marinus deliver a pulsed nutrient subsidy to Atlantic coastal waters during the spring. We conducted sea lamprey carcass addition experiments to quantify the autotrophic and heterotrophic responses of stream food webs.
Weaver, D., Coghlan Jr., S., and Zydlewski, J. (2016) Sea Lamprey Carcasses Influence Food Webs in an Atlantic Coastal Stream. 2016 Atlantic Salmon Ecosystems Forum. January 6-7. University of Maine, Orono, Maine.	January 2016	We conducted sea lamprey carcass addition experiments to quantify the autotrophic and heterotrophic responses of small stream food webs. We found increases in primary productivity immediately adjacent to carcasses but we did not detect broader spatial changes in productivity downstream of a gradient of increasing subsidies.
Weaver, D., Coghlan Jr., S., Perkins, B., and Zydlewski, J. (2016) Anadromous Sea Lamprey Influence Food Web Pathways in an Atlantic Coastal Stream Maine146th Annual Meeting of the American Fisheries Society. Kansas City, MO. August 23.	August 2016	Anadromous Sea Lamprey Petromyzon marinus deliver a pulsed nutrient subsidy to Atlantic coastal waters during the spring. We conducted sea lamprey carcass addition experiments to quantify the autotrophic and heterotrophic responses of stream food webs.
Weaver, D., Brown, M., and Zydlewski, J. (2019) Where there’s a Will, but not a Way: Behavior of American Shad Approaching the Brunswick Dam Fishway on the Androscoggin River, Maine. 2019 Maine Sustainability and Water Conference, Augusta, Maine. March 28.	March 2019	Brunswick Dam impedes fish passage in the Androscoggin River at the head of tide and blocks approximately 32 km of spawning habitat for American shad. We analyzed video and telemetry data collected by the Maine Department of Marine Resources from 2002-2005 to evaluate American shad behavior approaching the fishway relative to hydropower turbine operations.
Weaver, D., Brown, M., and Zydlewski, J. (2019) Where there’s a Will, but not a Way: Behavior of American Shad Approaching the Brunswick Dam Fishway on the Androscoggin River, Maine. 2019 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. March 26. (Poster)	March 2019	American shad are present in high numbers below the Brunswick Dam Maine, yet they are rarely passed upstream. We present telemetry and video data to better understand this poor fishway performance.
Weaver, D., Brown, M., and Zydlewski, J. (2018) Behavior of American Shad Approaching the Brunswick Dam Fishway on the Androscoggin River, Maine. 148th Annual Meeting of the American Fisheries Society. Atlantic City, New Jersey. August 20.	August 2018	Brunswick Dam, at the head of tide, impedes fish passage in the Androscoggin River and blocks approximately 32 km of spawning habitat for American shad. To inform passage improvements, a radio telemetry study was conducted from 2002–2005 to characterize American Shad behavior near the vertical slot fishway.
Weaver, D. Coghlan, S., and Zydlewski, J. (2014) Effects of anadromous Sea Lamprey as vectors of marine-derived nutrients in freshwater ecosystems. 144th Annual Meeting of the American Fisheries Society. Québec City, Canada. August 17-21.	August 2014	Many anadromous fish populations have declined due to migration barriers, habitat loss, and overfishing, reducing or eliminating nutrient subsidies. We examined the nutrient dynamics of semelparous Sea Lamprey Petromyzon marinus carcasses.
Watson, J., Coghlan, Jr.,S., Zydlewski, J., Hayes, D., and Kiraly, I. (2015) Fish Community Changes Associated With Dam Removal in the Penobscot River, Maine. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 25.	March 2015	Changes in fish communities pre and post dam removal were assessed. Timelines and implications were considered.
Watson, J., Coghlan, Jr., S., Zydlewski, J., and Hayes, D. (2016) Recovery of river herring Alosa spp. influences smallmouth bass Micropterus dolomieu diet and growth in the Penobscot River, Maine. Maine146th Annual Meeting of the American Fisheries Society. Kansas City, MO. August 23.	August 2016	Restoration efforts on the Penobscot River (Maine, USA) include the removal of the two lower-most dams and improvements to fish passage at remaining barriers. We collected smallmouth bass, via angling and electrofishing, from May – October 2015 in the Penobscot River watershed to determine the seasonal prevalence of river herrings in stomach contents.
Watson, J., Coghlan, Jr., S., Zydlewski, J., Hayes, D., and Kiraly, I. (2015) Fish Community Changes Associated With Dam Removal in the Penobscot River, Maine. The University of Maine Graduate Research Exposition. Orono, ME.	April 2015	Fish community changes in response to dam removal were described. Implications for anadromous fish recovery were considered.
Watson, J., Coghlan, Jr., S., Zydlewski, J., Hayes, D., and Kiraly, I. (2015) Fish Community Changes Associated With Dam Removal in the Penobscot River, Maine. 1st Annual University of Maine Freshwater Science Symposium, University of Maine, Orono. January 29.	January 2015	The Penobscot River has had two major dams removed. Electrofishing data was presented to characterize shifts in communities.
Watson, J., Coghlan, Jr., S., Zydlewski, J., Hayes, D., and Kiraly, I. (2015) Dam removal and fish passage improvement influence fish assemblages in the Penobscot River, Maine 145th Annual Meeting of the American Fisheries Society. Portland Oregon. August 16-20 INVITED.	August 2015	Removal of dams is assumed to reestablish species distributions and abundance, but this is infrequently tested.We assessed fish assemblages of the Penobscot River, Maine before (2010-2012) and after dam removal (2014) using boat electrofishing surveys and a stratified-random sampling design.
Watson, J., Coghlan, Jr., S., Zydlewski, J., Hayes, D. and Kiraly, I. (2016) Dam removal and fish passage improvement influence fish assemblages in the Penobscot River, Maine. Penobscot Watershed Conference, Northport, Maine. April 8.	April 2016	Diadromous fish restoration actions on the Penobscot River (Maine, USA) include the removal of the two lower-most dams and represent one of the most significant conservation efforts in the United States. We assessed fish assemblages before (2010-2012) and after (2014-2015) river modifications using boat electrofishing surveys and a stratified-random sampling design.
Watson, J., Coghlan, Jr., S., Zydlewski, J., Hayes, D. and Kiraly, I. (2016) Dam removal and fish passage improvement influence fish assemblages in the Penobscot River, Maine. Maine146th Annual Meeting of the American Fisheries Society. Kansas City, MO. August 23.	August 2016	Diadromous fish restoration actions on the Penobscot River (Maine, USA) include the removal of the two lower-most dams and represent one of the most significant conservation efforts in the United States. We assessed fish assemblages before (2010-2012) and after (2014-2015) river modifications using boat electrofishing surveys and a stratified-random sampling design.
Watson, J., Coghlan, Jr., S., Zydlewski, J., Hayes, D. and Kiraly, I. (2016) Dam removal and fish passage improvement influence fish assemblages in the Penobscot River, Maine. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 23.	March 2016	Diadromous fish restoration actions on the Penobscot River (Maine, USA) include the removal of the two lower-most dams and represent one of the most significant conservation efforts in the United States. We assessed fish assemblages before (2010-2012) and after (2014-2015) river modifications using boat electrofishing surveys and a stratified-random sampling design.
Watson, J., Coghlan, Jr., S., Zydlewski, J., Hayes, D. and Kiraly, I. (2016) Dam removal and fish passage improvement influence fish assemblages in the Penobscot River, Maine. 2016 Atlantic Salmon Ecosystems Forum. January 6-7. University of Maine, Orono, Maine.	January 2016	The two lower-most dams, Great Works and Veazie, were removed from the Penobscot River, Maine in 2012 and 2013, respectively. We assessed fish assemblages in the main-stem river and several major tributaries before (2010-2012) and after dam removal (2014-2015) using boat electrofishing surveys, employing a stratified-random sampling design.
Watson, J. , Coghlan Jr., S.,Hayes, D., Kiraly, I., and Zydlewski, J. (2017)Dam Removal and Fish Passage Improvement Influence Fish Assemblages in the Penobscot River, Maine Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 22.	March 2017	Restoration efforts on the Penobscot River (Maine, USA) are among the largest currently underway in the United States, and include the removal of the two lower-most dams and improvements to fish passage at remaining barriers. We assessed fish assemblages of the Penobscot River, Maine before (2010-2012) and after dam removal (2014) using boat electrofishing surveys and a stratified-random sampling design.
Wathen, R.., Coghlan, S. and Zydlewski, J. (2008) Competition between Atlantic salmon smolts and smallmouth bass; experiments in an artificial stream 138th Annual Meeting of the American Fisheries Society. Ottawa, Canada. August 17-21	August 2008
Wathen, R., Zydlewski, J., Coghlan, S., and Jackson, C. (2007) Construction of an artificial stream to assess interactions between smallmouth bass and salmonids. 137th Annual Meeting of the American Fisheries Society. San Francisco, CA. September 2-6.	September 2007
Wathen, G., Zydlewski, J., Coghlan, S., and Trial, J. (2009) Do invasive smallmouth bass compete with native Atlantic salmon for habitat? Atlantic International Chapter of the American Fisheries Society. Shelburne New Hampshire, September 20-22.	September 2009
Wathen, G., Zydlewski, J., Coghlan, S., and Trial, J. (2009) Do invasive smallmouth bass compete with native Atlantic salmon for habitat? 139th Annual Meeting of the American Fisheries Society. Nashville Tennessee. August 30-September 3.	September 2009
Wathen, G. Zydlewski, J., Coghlan, S., and Trial, J. (2009) Do invasive smallmouth bass compete with native Atlantic salmon for habitat? The Diadromous Species Restoration Research Network Science Meeting - Restoration of Diadromous Fishes and Their Ecosystems: Confluence of Science and Restoration. University of Maine, Orono, Maine. July 22-24.	July 2009
Vogel, S.K., Loftin, C., Zydlewski, J.D. Investigating the scientific networks of the Maine CRU. [poster] Maine Cooperative Fish and Wildlife Research Unit Annual Meeting. July 12, 2022. Orono, ME.	July 2023	The U.S. Geological Survey’s (USGS) Cooperative Fish and Wildlife Research Units (CRU) program establishes relationships among the USGS, U.S. Fish and Wildlife Service, Wildlife Management Institute, host universities, and state resource agencies. This research focuses on analyzing Unit scientist impacts and outputs by assessing the collaborative networks of the Units and the production of scientific publications as one measure of impact.
Vogel, S.K., Loftin, C., Zydlewski, J.D. A (very) brief history of the Cooperative Research Units Program. [oral, invited keynote] Maine Cooperative Fish and Wildlife Research Unit Annual Meeting. July 12, 2022. Orono, ME.	July 2023	The U.S. Geological Survey’s (USGS) Cooperative Fish and Wildlife Research Units (CRU) program establishes relationships among the USGS, U.S. Fish and Wildlife Service, Wildlife Management Institute, host universities, and state resource agencies. This research focuses on analyzing Unit scientist impacts and outputs by assessing the collaborative networks of the Units and the production of scientific publications as one measure of impact.
Vogel, S., Smith, S., and Zydlewski, J. (2020) Does habitat go with the flow? Sea-run fish habitat in the Penobscot River over the last century. 150th Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 30.	August 2020	Dams have been implicated in the declines in sea-run fish (e.g., Atlantic salmon, river herring, American shad, sea lamprey and two sturgeon species) through fragmentation, but the degree to which changes in seasonal flow regimes may influence population abundance through habitat impact has been less explored. We characterized the flow duration curves for the Penobscot River from 1903-present using USGS gauge station data, and identified the timing of influence imposed by dams and other alterat
Vogel, S., Smith, S., and Zydlewski, J. (2020) Modeling flow in Penobscot River pre and post dam removal. Atlantic International Chapter of the American Fisheries Society, Virtual Meeting. August 25.	August 2020	Historic changes in fluvial geomorphology can change the available habitat for fish species. We assessed changes in the Penobscot River over the last 200 years.
Vogel, S., Loftin, C., and Zydlewski, J. 2021 A collaborative organizational network analysis of the Cooperative Research Units program. 151st Annual Meeting of the American Fisheries Society. Baltimore, MD. November 6.	November 2021	The U.S. Geological Survey's Cooperative Fish and Wildlife Research Units Program (CRU) establishes a relationship among the U.S. Geological Survey (USGS), U.S. Fish and Wildlife Service (USFWS), Wildlife Management Institute (WMI), a host university, and state resource agencies.The goal is to elucidate how organizational factors may contribute to each cooperator network, how the networks have evolved, and how factors may influence future conditions of individual units and the CRU Program in ge
Vogel, S., Loftin, C., and Zydlewski, J. (2022) Collaboration networks within the CRU program. 152^stAnnual Meeting of the American Fisheries Society. Spokane, WA.	August 2022	The U.S. Geological Survey’s (USGS) Cooperative Fish and Wildlife Research Units (CRU) program establishes relationships among the USGS, U.S. Fish and Wildlife Service, Wildlife Management Institute, host universities, and state resource agencies. This research focuses on analyzing Unit scientist impacts and outputs by assessing the collaborative networks of the Unitis and the production of scientific publications as one measure of impact.
Vogel, S., Loftin, C., and Zydlewski, J. (2022) A Collaborative Organizational Network Analysis of the Cooperative Research Units Program. 2022 Atlantic Salmon Ecosystems Forum. January 11. University of Maine, Orono, Maine.	January 2022	The U.S. Geological Survey's Cooperative Fish and Wildlife Research Units Program (CRU) establishes a relationship among the U.S. Geological Survey (USGS), U.S. Fish and Wildlife Service (USFWS), Wildlife Management Institute (WMI), a host university, and state resource agencies. We are evaluating the program's structure and socio-technical connectivity to identify motivations, relationships, and layered networks among members and their relationships to outcomes through an Organizational Networ
Vogel, S., Loftin, C., and Zydlewski, J. (2024) Charting collaborative waters: Network dynamics of the USGS CRU program. Charting collaborative waters: Network dynamics of the USGS CRU program. 154th Annual Meeting of American Fisheries Society, Honolulu, Hawai’i. September 15.	September 2024	The CRU program is intended to meet the information needs of managers. Our research utilized a survey and an analysis of CRU publications to evaluate the program's potential in bridging the “knowledge-action gap”.
Vogel, S., Loftin, C., and Zydlewski, J. (2022) Collaboration networks within the CRU program. The Atlantic International Chapter of the American Fisheries Society. Newry, Maine. September 18.	September 2022	Collaboration networks within the CRU program.
Vogel, S., Jansujwicz, J., and Zydlewski, J. (2020) Fish passage decision-making during hydropower relicensing in the Kennebec and Penobscot Rivers, Maine2019 Atlantic Salmon Ecosystems Forum. January 14. University of Maine, Orono, Maine.	January 2020	The Federal Energy Regulatory Commission (FERC) regulates most hydropower dams and grants 30-50 year licenses to projects and typically include conditions for the conservation of sea-run fish (e.g., fish passage construction, operation changes, monitoring, and other mitigative conditions). Using the Kennebec and Penobscot Rivers as a model system, we sought to identify the main factors that influence fish passage decision-making and describe patterns of stakeholder engagement in licensing from
Vogel, S., Jansujwicz, J., and Zydlewski, J. (2019) What does “best available science” mean in the FERC hydropower relicensing process? 2019 Maine Sustainability and Water Conference, Augusta, Maine. March 28.	March 2019	Making informed decisions about hydropower operations and management during FERC relicensing requires the production and use of science. Official relicensing documents were analyzed, to enhance our understanding of how agency stakeholders define “best available science”.
Vogel, S., Jansujwicz, J., and Zydlewski, J. (2019) What does “best available science” mean in the FERC hydropower relicensing process? 2019 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. March 26. (Poster)	March 2019	FERC decisions for dam re licensing are infrequent, yet quite influential. We explore how science is used in this process.
Vogel, S., Jansujwicz, J., and Zydlewski, J. (2019) Science in Action or Science Inaction: The Use of Best Available Science in The FERC Hydropower Relicensing Process 149th Annual Meeting of the American Fisheries Society. Reno Nevada. September 29.	September 2019	Relicensing proceedings invoke a range of knowledge sources and agency regulators are tasked with using the “best available science” (BAS) to make informed decisions about hydropower operations and management. Enhanced understanding of information use may aid in identifying pathways for well-informed relicensing decisions.
Vogel, S., Jansujwicz, J., and Zydlewski, J. (2018) Unraveling the FERC eLibrary: fish passage and hydro relicensing. Maine Cooperative Fish and Wildlife Research Unit Cooperator’s Meeting, March 22. University of Maine, Orono.	March 2018	The FERC relicensing process is a critical phadse for managers to assess fish passage criteria. We are using a document analysis of the FERC eLibrary to inform patterns in the process.
Vogel, S., Jansujwicz, J., and Zydlewski, J. (2018) The role of science in hydropower licensing: Lessons from the Kennebec and Penobscot Rivers, Maine. 148th Annual Meeting of the American Fisheries Society. Atlantic City, New Jersey. August 20.	August 2018	Over the next decade, nearly 25 percent of active hydropower projects in the United States will require relicensing by the Federal Energy Regulatory Commission (FERC). To better understand the use and perception of science in relicensing, we investigated how stakeholders and FERC use certain types of knowledge (e.g., peer reviewed papers, consultant reports, impact statements).
Vogel, S., Jansujwicz, J., and Zydlewski, J. (2018) Fish Passage at Hydropower Dams on the Penobscot and Kennebec Rivers: A Content Analysis of the FERC eLibrary Database. 2018 Atlantic Salmon Ecosystems Forum. January 17. University of Maine, Orono, Maine.	January 2018	Measures to assist migration through dams such as fishways can differ greatly in scope and performance and are often mandated on a case-by-case basis. We are studying the regulatory processes for projects in the Kennebec and Penobscot River watersheds to assess abiotic, biotic and social correlates with regulatory outcomes.
Vogel, S., Jansujwicz, J., and Zydlewski, J. (2017) Hydropower and Fisheries: Agency Decision Making in the FERC Relicensing Process. 147th Annual Meeting of the American Fisheries Society. Tampa, FL. August 20.	August 2017	Over the next decade, nearly 25 percent of active hydropower dams nationwide will require relicensing by the Federal Energy Regulatory Commission (FERC). In an effort to minimize complexity and streamline productivity our research is focused on understanding the factors that influence agency choice of fish passage mitigation requirements.
Vogel, S., Jansujwicz, J., and Zydlewski, J. (2017) How Regulatory Agencies Weigh Energy and Environmental Tradeoffs in Dam Relicensing Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 22.	March 2017	Over the next decade, nearly 25 percent of active hydropower dams nationwide will require relicensing by the Federal Energy Regulatory Commission (FERC). In an effort to minimize complexity and streamline productivity our research is focused on understanding the factors that influence agency choice of fish passage mitigation requirements.
Trophic ontogeny of an elusive fish through eye lens stable isotope analysis. Schumacher, G.T., Murphy, C.A., Furey, N.B., Kinnison, M.T., Kronisch, G.R., Erdman, B., Peebles, E.B. Presentation for the American Fisheries Society Annual Meeting. Honolulu, Hawai'i. September 15-19, 2024.	September 2024	Ontogenetic niche shifts are an important developmental milestone in many fishes. We are using successive layer eye lens SIA to elucidate the trophic ontogeny of Arctic Charr in three Maine lakes with distinct adult trophic roles: piscivorous, planktivorous, and benthic invertivorous. Future work will relate early life stage trophic variability in Arctic Charr to long-term viability of the species in context of broader food webs and climate driven habitat and resource shifts.
Tomback, D. F., L. E. Barringer, M. B. Wunder, and S. T. McKinney. Whitebark pine stand condition, tree abundance, and cone production as predictors of visitation by Clark's nutcracker. Whitebark Pine Ecosystem Foundation Science Seminar. Kimberley, British Columbia.	September 2012
Thornton, E. and Zydlewski, J. (2016) American eel survival through Milford Dam on the Penobscot River, Maine. 2016 Atlantic Salmon Ecosystems Forum. January 6-7. University of Maine, Orono, Maine.	January 2016	There is a need to successfully balance the economic and environmental priorities of hydroelectric dams so that they can efficiently generate power without negatively affecting migratory fish populations. This balance hinges on a better understanding of fish movement and survival through dams. Here, we propose a project that will examine American eel survival through the Milford Dam on the Penobscot River, Maine.
Stich, D., and Zydlewski, J. (2015) Modeling effects of dam passage performance standards on American shad populations. NOAA National Hydropower Program Meeting. Gloucester, MA. July 9. INVITED	July 2015	Shad recovery goals are often poorly informed by population level assessment. A model to characterize shad passage and survival was presented.
Stich, D., and Zydlewski, J. (2015) Modeling effects of dam passage performance standards on American shad populations. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 25.	March 2015	American shad recovery in the Penobscot River was modeled. Implications for passage were considered.
Stich, D., and Zydlewski, J. (2015) Modeling effects of dam passage performance standards on American shad populations. 1st Annual University of Maine Freshwater Science Symposium, University of Maine, Orono. January 29.	January 2015	The effects of selective passage and of delays of American shad were modeled. Changes and demographics and timing were characterized.
Stich, D., and Zydlewski, J. (2011). Atlantic salmon smolt movements and survival in the Penobscot River. The Nature Conservancy, September 15, 2011. INVITED	September 2011	Discussion of Atlantic salmon smolt mortality in the Penobscot River
Stich, D., and Zydlewski, J. (2011). Atlantic salmon smolt behavior and survival 2010 and 2011. Penobscot River Restoration Trust, November 15, 2011.	November 2011	Atlantic salmon smolt behavior and survival 2010 and 2011
Stich, D., Zydlewski, J., Bailey, M., Kinnison, M., Kocik, J., and Zydlewski G. (2013) Atlantic salmon smolt survival through dams in the Penobscot River. Maine Cooperative Fish and Wildlife Research Unit Annual Meeting, University of Maine, Orono, Maine. INVITED. March 21.	March 2013	The assessment of mortality of Atlantic salmon smolts in the Penobscot River was presented
Stich, D., Sheehan, T., and Zydlewski, J. Effects of Dam Passage Performance Standards on American Shad Population Demographics and Abundance. SUNY Faculty Research Day. November 13. INVITED.	November 2015	We describe the development of a stochastic life history-based simulation model for Alosines that can be used to estimate effects of dam passage and migratory delay on vital rates of migrants, distribution of spawning adults, and demographic structuring through space and time. Using an individual-based approach to simulate migration dynamics, we relate fish passage and associated delay at hydropower dams to metrics that can be used to support quantitative-based regulatory decisions.
Stich, D., Sheehan, T., and Zydlewski, J. (2016) Quantitative decision-support tools for dam passage performance standards in the Northeast US. Maine146th Annual Meeting of the American Fisheries Society. Kansas City, MO. August 23.	August 2016	Poor passage and delay at dams can affect population structure and abundance of anadromous fishes and have been causal to range-wide declines in American shad and alewife.We describe a stochastic, life history-based simulation model for American shad in order to support quantitative-based decisions.
Stich, D., Sheehan, T., and Zydlewski, J. (2016) Projected tradeoffs in population abundance of American shad (Alosa sapidissima) in relation to upstream and downstream passage at dams. 2016 Atlantic Salmon Ecosystems Forum. January 6-7. University of Maine, Orono, Maine.	January 2016	We describe the development of a stochastic life history-based simulation model for Alosines that can be used to estimate effects of dam passage and migratory delay on vital rates of migrants, distribution of spawning adults, and demographic structuring through space and time. Using an individual-based approach to simulate migration dynamics, we relate fish passage and associated delay at hydropower dams to metrics that can be used to support quantitative-based regulatory decisions.
Stich, D., Sheehan, T., and Zydlewski, J. (2015) Performance standards modeling for alosines in the Northeast U.S. 145th Annual Meeting of the American Fisheries Society. Portland Oregon. August 16-20 INVITED.	August 2015	Passage failure and delay at dams can affect spatial and demographic structuring of spawning adults and downstream migrants. We describe the development of a stochastic life history-based simulation model for alosines that can be used to estimate effects of dam passage and migratory delay on vital rates of migrants, spatial distribution of spawning adults, and demographic structuring.
Stich, D., Bailey, M., and Zydlewski, J. (2014) Survival of Atlantic salmon smolts through a hydropower complex in the lower Penobscot River, Maine USA. 2014 Atlantic Salmon and Their Ecosystems Forum, University of Maine, Orono. January 8.	January 2014	Survival analysis of downstream migrating Atlantic salmon smolts is presented for the reach of the Penobscot River that is currently the focus of restoration actions. The data suggest that the current dam removals are unlikely to improve overall smolt survival through the reach because of remaining and increased hydropower activity.
Stich, D., Bailey, M., Kinnison, M., Kocik, J., Zydlewski, G., and Zydlewski, J. (2015) Atlantic salmon smolt survival during freshwater and estuary migrations. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 25.	March 2015	Atlantic salmon smolt survival during freshwater and estuary migrations was presented. Implications for recovery were considered.
Stich, D., Bailey, M., Holbrook, C., Kinnison, M., Zydlewski, G., Zydlewski, J. (2012) Atlantic salmon smolt movements and survival in the Penobscot River. 2012 Forum, Atlantic Salmon and their Ecosystems, Bangor Maine January 10-11.	January 2012
Stich, D., Bailey, M. and Zydlewski, J. (2014) Expecting the Unexpected: Combined Effects of Dam Removal and Re-allocation of Hydropower on Atlantic Salmon Smolt Migrations. 144th Annual Meeting of the American Fisheries Society. Québec City, Canada. August 17-21.	August 2014	We evaluated Atlantic Salmon (Salmo salar) smolt survival in the lower Penobscot River, Maine USA through the main-stem of the river and an alternative migration route, the Stillwater Branch. This work was conducted prior to removal of two main-stem dams and doubling of hydropower generation in the Stillwater Branch.
Stich, D., Bailey,M., Holbrook, C., Kinnison, M., Kocik,J., Zydlewski,G., and Zydlewski, J. (2013) Path choice and survival of Atlantic salmon smolts in the Penobscot River, ME. Poster presentation to DSSRN, January 10.	January 2013	Assessmet of smolt survival in the Penobscot River. This is important in light of restoration efforts.
Stich, D. S., M. Bailey, C. M. Holbrook, M. Kinnison, J. Kocik, G. Zydlewski, and J. Zydlewski (2012) Atlantic salmon smolt migration and survival prior to dam removal. Oral presentation at the 142nd Annual Meeting of the American Fisheries Society, Minneapolis-St. Paul, MN.	August 2012
Spencer, R., J. Zydlewski and G. Zydlewski (2008) Comparison of migratory urge and gill Na+,K+-ATPase activity of Atlantic salmon (Salmo salar) smolts from Dennys and Penobscot River stocks. Atlantic Salmon Research Forum. Orono, ME. January 8.	January 2008
Spencer, R, Zydlewski, J, Zydlewski, G. Comparing the migratory behavior and physiology of Atlantic salmon smolts from Dennys and Penobscot River stocks. Presented at the 29th Annual Meeting of the Atlantic International Chapter of the American Fisheries Society, 2005, Rangeley, Maine.	October 2005
Song, C., Mo, W., Zydlewski, J., and O’Malley, A. (2018) System dynamics modeling of energy and fish tradeoffs under various dam decision scenarios. International Symposium for Sustainable Systems and Technology. June 25. Buffalo, New York.	June 2018	We developed a system dynamics model to simulate the tradeoffs between hydropower and diadromous fish populations using five dams on the main-stem of Penobscot River, Maine, as a case study. This model tracks the simulated dynamic behaviors of fish stocks related to hydropower generation for five diadromous fish species (Alewife, Alosa pseudoharengus; American shad A. sapidissima; Atlantic salmon, Salmo salar; sea lamprey, Petromyzon marinus; and American eel, Anguilla rostrata), over a 50-year
Song, C., Mo, W., Zydlewski, J., O’Malley, A. (2020) Balancing fish-energy-cost tradeoffs through strategic basin-wide dam management. International Symposium on Sustainable Systems and Technology (ISSST). June 8. Pittsburgh PA	June 2020	Dam management often involves tradeoffs among hydropower generation capacity, environmental impacts, and project costs. In order to assess the scope for theoretical tradeoffs, a dynamic model of hydropower production, important fish population, and project costs was developed using the system dynamics modeling technique.
Song, C., Mo, W., O’Malley, A., Roy, S., Zydlewski, J., and Barber, B. (2019) Managing dams for energy and fish biodiversity tradeoffs: What does a win-win solution take? AEESP Research and Education Conference. University of Arizona, Tucson, Arizona, May 14.	May 2019	The work considered the inherent trade-off between hydro power production and fish passage. We use a biological model liked with a power production model to optimize a model system.
Snyder, S., Stich, D., and Zydlewski, J. (2024) Impacts of dams on river herring populations through their native range: what’s left? The Atlantic Salmon Ecosystems Forum, University of Maine, Orono, Maine. January 9.	January 2023	River herring are native along the East Coast of North America and provide ecosystem services to freshwater habitats. To assess coast-wide spawning potential for river herring, we identified historically accessible spawning habitat (pre-dam) in coastal freshwater rivers based on physical river characteristics (stream width, depth, and gradient).
Snyder, S., Stich, D., and Zydlewski, J. (2024) Impacts of dams on river herring populations through their native range: what’s left? 154th Annual Meeting of American Fisheries Society, Honolulu, Hawai’i. September 15.	September 2024	To assess spawning potential for river herring, we identified historically accessible spawning habitat in rivers. To assess the impact of dams on spawning habitat, we characterized spawning habitat upstream and downstream of dams.
Snook, E., Danylchuk, A., Letcher, B., Zydlewski, J., Whiteley, A., Dubreuil, T., and Hurley, S. (2012) Movement Patterns of Anadromous Brook Trout in a Restored Coastal Stream System in Southern Massachusetts. Oral presentation at the 142nd Annual Meeting of the American Fisheries Society, Minneapolis-St. Paul, MN.	August 2012
Smith, R., and Zydlewski, J. (2022) Motive, means and opportunity: Could smallmouth bass be a major predator of Atlantic salmon? 2022 Atlantic Salmon Ecosystems Forum. January 11. University of Maine, Orono, Maine.	January 2022	Smallmouth bass (<i>Micropterus dolomieu</i>) is an introduced nonnative fish widespread throughout Maine waters, and is known to be a predator of juvenile salmon during rearing and migration.We will use GIS analysis of electrofishing data from 1956-2020 to assess the spatial and temporal overlap of Atlantic salmon and smallmouth bass in the river systems of Maine.
Smith, R., Murphy, C., and Zydlewski, J. (2023) Bioenergetics model to estimate predation risk of juvenile Atlantic Salmon by Smallmouth Bass in the Weldon Headpond, Maine. 153rd Annual Meeting of American Fisheries Society, Grand Rapids, Michigan. August 20.	August 2023	Smallmouth Bass are known to predate on juvenile salmon during freshwater rearing and during seaward migration but the degree to which this influence is ecologically relevant is poorly characterized. To characterize the potential level of predation by on smolts in this reach, we built a heuristic bioenergetic consumption model.
Smith, R., Murphy, C., and Zydlewski, J. (2024) Survival of the smallest. Predation on Atlantic Salmon smolts by Smallmouth Bass in the Weldon Headpond. 154th Annual Meeting of American Fisheries Society, Honolulu, Hawai’i. September 15.	September 2024	Smallmouth Bass are known to predate on juvenile salmon during freshwater rearing and during seaward migration.To characterize the potential level of predation on migrating smolts in this reach, we built a bioenergetic consumption model.
Smith, R., Murphy, C. and Zydlewski, J. (2024) Migration Risk: How many Atlantic salmon smolts could smallmouth bass eat during smolt seaward migration in the Weldon headpond? The Atlantic Salmon Ecosystems Forum, University of Maine, Orono, Maine. January 9.	January 2023	Evidence suggests that lower survival of migrating smolts in the Weldon Headpond is due in part due to predation. The degree to which this influence is ecologically relevant, however, is poorly characterized.
Smith, R. and Zydlewski, J. (2022) Are smallmouth bass a major threat to juvenile Atlantic salmon? A habitat suitability model approach. 152^stAnnual Meeting of the American Fisheries Society. Spokane, WA.	August 2022	Smallmouth bass (<i>Micropterus dolomieu</i>) is an introduced nonnative fish widespread throughout Maine waters, and is known to be a predator of juvenile salmon during rearing and migration. The degree to which this influence is ecologically relevant, however, is unknown.
Smith, R. and Zydlewski, J. (2021) Motive, means and opportunity: Could smallmouth bass be a major predator of Atlantic salmon? 151^st Annual Meeting of the American Fisheries Society. Baltimore, MD. November 6.	November 2021	Smallmouth bass (<i>Micropterus dolomieu</i>) is an introduced nonnative fish widespread throughout Maine waters, and is known to be a predator of juvenile salmon during rearing and migration. We will use mark recapture techniques to assess smallmouth bass density and biomass in a high migratory risk area of the Penobscot River.
Smith, R. and Zydlewski, J. (2022) Are smallmouth bass a major threat to juvenile Atlantic salmon? A habitat suitability model approach. The Atlantic International Chapter of the American Fisheries Society. Newry, Maine. September 18.	September 2022	Are smallmouth bass a major threat to juvenile Atlantic salmon? A habitat suitability model approach.
Sloane, K., Zydlewski, J., Jayasundara, N. (2021) Phenotypic level changes caused by thermal stress during early development in zebrafish (Danio rerio). 151^st Annual Meeting of the American Fisheries Society. Baltimore, MD. November 6.	November 2021	We sought to identify phenotypic effects of thermal stress during early development in Zebrafish (<i>Danio rerio</i>). This was done by exposing zebrafish embryos to both acute and long term thermal stress and measuring post-exposure probability of mortality, heartrate, activity, and mitochondrial respiration.
Sloane, K., Westbrook, M., Jayasundara, N., and Zydlewski, J. (2020) Using micro-respirometry to measure temperature effects on the metabolism of Atlantic Salmon (Salmo salar) during embryonic development. 150th Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 30.	August 2020	It has been difficult to quantify energy expenditure during embryonic development in fish due to the absence of a suitable tool for measuring small-scale oxygen consumption rates (OCR). We have developed a 12-well micro-respirometer to measure metabolic rate in Atlantic salmon embryos.
Sloane, K., Jayasundara, N., Westbrook, M., and Zydlewski, J. (2020) Using micro-respirometry to measure mitochondrial function throughout early development in Atlantic Salmon embryos. Atlantic International Chapter of the American Fisheries Society, Virtual Meeting. August 25.	August 2020	Early metabolism may influcen later matabolism in fish. We developed a small scale means of assessing metabolic performance .
Simons, E. M., W. B. Krohn, and D. J. Harrison. Influences of past and future forest management on the spatiotemporal dynamics of habitat supply for Canada lynx and American marten. Presentation at the Cooperators’ Meeting, Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono.	May 2010
Simons, E. M., D. J. Harrison, and W. B. Krohn. Influences of past and future forest management on the spatiotemporal dynamics of habitat supply for Canada lynx and American martens in northern Maine. Invited presentation to the Director and Division supervisors of the Maine Forest Service, Augusta, ME. (Krohn & Harrison were the presenters).	June 2009
Simons, D. J. Harrison, and W. B. Krohn. Ecological factors associated with landscape-scale occurrence of Canada lynx in northern Maine. Canada Lynx on the Border: Biological and Political Realities for Conservation Planning. International Workshop Organized by the University of Minnesota, Grand Portage, MN. (Simons presented).	October 2007
Simon, E. M., D. J. Harrison, W. B. Krohn, K. R. Legaard, J. S. Wilson, and S. A. Sader. “Past and future trends in habitat supply for marten and lynx across the landscapes of northern Maine, 1973-2032.” Invited presentation at special wildlife/forestry session of "Bio: Mass, Fuel, Products, Diversity" Resource Management in a Changing World, ” a joint conference of the Northeast Section of the Society of American Foresters and the Maine Chapter of The Wildlife Society. Portland, ME.	March 2009
Sigourney, D., and Zydlewski, J. (2016) Modeling Migration of Silver Eels to Forecast Critical Intervals of Risk 2016 Atlantic Salmon Ecosystems Forum. January 6-7. University of Maine, Orono, Maine.	January 2016	Populations of eels are in decline worldwide. To help mitigate dam mortality, we are working to develop a tool that can forecast migratory events.
Sigourney, D., Hughes, E., Zydlewski, J., and Cox, O. (2012) Monitoring adult Atlantic salmon in the Penobscot River using PIT telemetry. 2012 Forum, Atlantic Salmon and their Ecosystems, Bangor Maine January 10-11.	January 2012
Sigourney, D., Hughes, E., Cox, O., O’Malley, A. and Zydlewski, J. (2012) Assessment of Live Transport of adult Atlantic salmon in the Penobscot River, USA. Oral presentation at the 142nd Annual Meeting of the American Fisheries Society, Minneapolis-St. Paul, MN.	August 2012
Sigourney, D. and Zydlewski, J.(2013) Modeling the downstream migration of silver American eel . The Nature Conservancy, Brunswick Maine. September 17. INVITED.	September 2013	Presentation of a model to predict the timing of downstream migrating American eel
Sigourney, D. and Zydlewski, J. (2015) Modeling Migration of Silver Eels to Forecast Critical Intervals of Risk 145th Annual Meeting of the American Fisheries Society. Portland Oregon. August 16-20 INVITED, PRESENTED.	August 2015	Populations of eels are in decline worldwide and one potentially significant source of mortality may occur at hydroelectric facilities during the downstream migration of adult silver eels. We assess the utility of Bayesian hierarchical modeling methods to forecast the probability of migratory events of silver eels.
Sigourney, B. and Zydlewski, J. (2014) Modeling Migration of Silver Eels to Forecast Critical Intervals of Risk. 144th Annual Meeting of the American Fisheries Society. Québec City, Canada. August 17-21.	August 2014	We compare two approaches that combine information on daily counts of migrating eels with information on environmental conditions to predict migration. We apply our modeling approach to multiple data sets of migrating eels and assess the ability to forecast migration in systems that are both data rich and data poor in terms of information on eel migrations.
Sigourney D. and Zydlewski, J. (2012) Passage at West Enfield Dam. Oral presentation at the Atlantic salmon passage working group, INVITED October 5.	October 2012	Assessment of salmon passage at West Enfield Dam.
Sigourney D. and Zydlewski, J. (2012) Passage at West Enfield Dam 2002-2004 and 2010-2012. Oral presentation at the Atlantic salmon passage working group. INVITED, PRESENTED, October 8.	October 2012	Compared Atlantic salmon passage before and after modifications to West Enfield Dam.
Scott, S. A., W. B. Krohn, and D. J. Harrison. Influence of declining snowshoe hare densities on Canada Lynx occurrence in northern Maine. Poster presented at the Cooperators’ Meeting, Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono.	May 2010
Scott, S. A., D. J. Harrison, and W. B. Krohn. “The relative effects of forest practices and natural population processes on the temporal dynamics of snowshoe hare populations in northern Maine.” Invited presentation at special wildlife/forestry session of "Bio: Mass, Fuel, Products, Diversity" Resource Management in a Changing World, ” a joint conference of the Northeast Section of the Society of American Foresters and the Maine Chapter of The Wildlife Society. Portland, ME.	March 2009
Scott, S. A., D. J. Harrison, and W. B. Krohn. (Krohn and Harrison presented). Spatio-temporal Dynamics of Snowshoe Hare Density and Relationships to Canada Lynx Occurrence in Northern Maine. Maine Cooperative Forestry Research Unit, University of Maine, Orono.	January 2010
Scott, S. A., D. J. Harrison, and W. B. Krohn. “Spatio-temporal dynamics of snowshoe hares in northern Maine.” Presentation at the Northeast Fish and Wildlife Conference, Lancaster, PA.	April 2009
Schumacher, G.T., Murphy, C.A., Furey, N.B., Kinnison, M.T., Can trophic flexibility mitigate shifting habitat and community structure for a climate-sensitive fish? Presentation to Society for Freshwater Science Annual Meeting. Philadelphia, PA.	June 2024	Global climate change is expected to have broad consequences in aquatic ecosystems. In lakes, climate change is expected to alter resource availability and community structure. Long term results of this project are intended to inform modeling of Arctic Charr trophic responses under a variety of climate change scenarios, improving our understanding of the long-term viability of this and other cold-water adapted vulnerable species.
Schaefer, S. M., W. B. Krohn, and R. J. O'Connor. A new approach for testing the accuracy of vertebrate occurrence predictions. Abstract and presentation at the Twelfth Annual National Gap Analysis Program Meeting, Shepherdstown, WV. (Schaefer presented).	August 2002
Saunders, R., Coghlan, Jr., S., Zydlewski, J. and Sheehan, T. (2011) Dam removal allows re-colonization of historic habitat by three species of anadromous fish in Sedgeunkedunk Stream, Maine. 141th Annual Meeting of the American Fisheries Society. Seattle, Washington. September 4-9.	September 2011
Ryan, K., Calhoun, A., and Zydlewski, J. (2012) Using PIT tag technology to understand emergence in spadefoot toads. North America Section - Society for Conservation Biology, Oakland, CA. July 15-18.	July 2012
Rustigian, H. L., and W. B. Krohn. GIS-based evaluation of waterfowl and wading bird habitats in Maine. Abstract and poster presented at the Northeast Fish and Wildlife Conference, Portland, ME.	April 2002
Rubenstein, S., and Zydlewski, J. (2022) Dams may force semelparity in Atlantic salmon. 152^stAnnual Meeting of the American Fisheries Society. Spokane, WA.	August 2022	Adult Atlantic salmon endure a long upstream migration without feeding, entering freshwater in May-July to reproduce.We modelled the bioenergetic costs incurred by delayed fish under temperature regimes that would be encountered under a “no dam” (no delay) scenario versus one, two, three, or four dams.
Rubenstein, S., Zydlewski, J., Peterson, E., Jayasundara, N., and Christman, P. (2020) Energetic impacts of passage delays in migrating adult Atlantic salmon2019 Atlantic Salmon Ecosystems Forum. January 14. University of Maine, Orono, Maine.	January 2020	Passage delays expose upstream migrating fish to elevated water temperatures causing increased metabolic demand, but there currently exists no clear quantification of metabolic costs and fitness risks. Using temperature logging radio tags and a Distell Fish Fatmeter, we radio tagged, tracked, and measured 66 Atlantic salmon over two years on both the Penobscot and Kennebec Rivers.
Rubenstein, S., Zydlewski, J., Jayasundara, N., and Christman, P. (2019) Energetic impacts of passage delays in migrating adult Atlantic salmon. 2019 Maine Sustainability and Water Conference, Augusta, Maine. March 28.	March 2019	Despite extensive restoration efforts, inefficient fishways at dams continue to act as a barrier to Atlantic salmon movement during upstream spawning migrations. We are characterizing these specific energetic costs of delays to upstream migrating adult salmon with bioenergetics modeling informed by our field work.
Rubenstein, S., Zydlewski, J., Jayasundara, N., and Christman, P. (2019) Energetic impacts of passage delays in migrating adult Atlantic salmon. 2019 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. March 26. (Poster)	March 2019	Atlantic salmon are often delayed at dams. We explore the theoretical cost of thermally accelerated metabolic loss on the success of these migrants.
Rubenstein, S., Peterson, E., and Zydlewski, J. (2020) The impact of dams on Migrating adult Atlantic Salmon. Penobscot County Conservation Association. Brewer, ME. January 9.	January 2020	Dams slow the migration of Atlantic salmon. The cost of these delays was discussed.
Rubenstein, S., Peterson, E., Jayasundara, N., Christman, P., and Zydlewski, J. (2020) Energetic and spawning consequences to upstream migrating Atlantic salmon delayed below dams. 150th Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 30.	August 2020	Inefficient fishways at dams continue to slow and prevent upstream migrations to spawning habitat; delays of weeks to months are common.We used a Distell Fish Fatmeter and radio telemetry techniques to assess thermal experience and energy loss in fish delayed at dams.
Rubenstein, S., Peterson, E., Christman, P., Jayasundara, N., and Zydlewski, J. (2021) Dams may force semelparity in Atlantic salmon. 151^st Annual Meeting of the American Fisheries Society. Baltimore, MD. November 6.	November 2021	The remaining wild populations of U.S. Atlantic salmon are predominantly found in Maine rivers within highly dammed watersheds. Our model indicates a 65% decrease in the number of fish that would have enough reserves to spawn successfully and recondition (potential repeat spawners) if forced to pass four dams.
Rubenstein, S., Jayasundara, N., and Zydlewski, J. (2018) Energetic impacts of passage delays in migrating adult Atlantic salmon. Maine Cooperative Fish and Wildlife Research Unit Cooperator’s Meeting, March 22. University of Maine, Orono.	March 2018	Atlantic salmon in the Penobscot River experienced delays at dams. We are using energetic modeling to inform the biological risk of delay.
Rubenstein, S., Jayasundara, N., and Zydlewski, J. (2018) Energetic impacts of passage delays in migrating adult Atlantic salmon. 148th Annual Meeting of the American Fisheries Society. Atlantic City, New Jersey. August 20.	August 2018	Even if successful, upstream migrating adult Atlantic salmon can experience delays for several weeks at higher temperatures that would otherwise be experienced if unimpeded. We intend to characterize energetic costs of these delays at the first dams on the Penobscot and Kennebec Rivers
Rubenstein, S., Jayasundara, N., Christman, P., Peterson, E., and Zydlewski, J. (2019) Energetic impacts of passage delays in migrating adult Atlantic salmon 149th Annual Meeting of the American Fisheries Society. Reno Nevada. September 29.	September 2019	During migration, long delays (weeks to months) are commonly observed below dams, exposing fish to elevated water temperatures approaching 27oC. We sought to assess the role of thermal exposure (ATUs) on energy depletion in the field.
Roy, S., Uchida, E., Wilson, K., Neptune, S., Gold, A., Gardner, K., Klein, S., Fox, E., Smith, S., Zydlewski, J., and Hart, D. (2018) How interdisciplinary approaches to big data analytics can strengthen the role of science in dam decisions. Society for Freshwater Science. May 20. Detroit, Michigan.	May 2018	We draw upon a wide array of data sources to examine trade-offs between multiple ecosystem services, such as hydropower, fish passage, recreation, and water supply, that are valued by stakeholders and impacted by dam decisions at multiple spatial scales. Based on model results, we find numerous opportunities to restore historic anadromous fish habitat while minimizing reductions in other important services such as water supply or hydropower.
Robinson, L., D. J. Harrison. W. B. Krohn, J. H. Vashon, and M. A. McCollough. Ecological factors associated with the distribution of Canada lynx (Lynx canadensis) in northern Maine. Presentation to Carnivores 2006. St. Petersburg, FL. (Robinson presented).	November 2006
Ratten, S., and Zydlewski, J. (2013) An evaluation of reintroduced lake whitefish in St. Froid Lake. Maine Cooperative Fish and Wildlife Research Unit Annual Meeting, University of Maine, Orono, Maine. INVITED. March 21.	March 2013	The reintroduction of lake whitefish was assessed using telemetry and trap netting.
Ratten, S. and Zydlewski, J. (2012) Evaluating lake whitefish reintroduction in St. Froid Lake, Winterville, Maine. Oral presentation at the 142nd Annual Meeting of the American Fisheries Society, Minneapolis-St. Paul, MN.	August 2012
Ratten, S. and Zydlewski, J. (2011) Growth and movements of lake whitefish in two Maine lakes. 141th Annual Meeting of the American Fisheries Society. Seattle, Washington. September 4-9.	September 2011
Ramberg-Pihl, N., Greig, H., Coghlan, Jr., S. and Zydlewski, J. (2016). Unraveling the Impacts of Temperature, Flow, Prey Availability, and Competition on Juvenile Atlantic Salmon (Salmo salar) Performance in a Rapidly Changing Climate 2016 Harold W. Borns, Jr. Symposium April 14.	April 2016	Juvenile salmon compete in habitats where they compete with conspecifics, native and non-native fish. We discuss the initiation of a project to assess levels of competition between these fish.
Ramberg-Pihl, N., Coghlan, C., and Zydlewski, J. (2019) Unraveling the impacts of competition and warming on juvenile Atlantic salmon (Salmo salar) performance in Maine streams. The 2019 Annual Meeting of the Society for Freshwater Science, Salt Lake City, Utah, May 19.	May 2019	Understanding the temperature dependence of competition with warmwater species is a key aspect of managing salmonid fish populations in future climate change. We conducted a microcosm experiment to examine the performance of juvenile Atlantic salmon (Salmo salar) at two temperatures (18C and 21C) in the presence and absence of non-native smallmouth bass (Micropterus dolomieu).
Pham, K., Murphy, C.A., Romer, J.D., Stertz, K.A. 2024. Freshwater CSI: Chinook Salmon life-history influences how diagnostic structures relate to fish length. Presentation to the Society for Freshwater Science Annual Meeting, Philadelphia, PA.	June 2024	Bones and similar structures can provide information on the species and estimated sizes of decomposed or digested fishes. Our observations highlight the need for population and life history specific allometric data when constructing regression models to ensure they are representative of the target population.
Peterson, E., and Zydlewski, J. (2020) Do they need to know to go? Motivation for dam passage in American shad from the Penobscot River, Maine. 150th Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 30.	August 2020	Recent dam removals and fish passage improvements on the Penobscot River have restored access to over 97% of the historic spawning range of American shad as of 2014. We evaluated factors contributing to passage motivation in adults by radio tagging migrants downstream of the lowest dam on the river, Milford Dam (unknown motivation), and comparing them with fish tagged at the dam (demonstrated motivation) and released into the headpond beginning in 2018.
Peterson, E., and Zydlewski, J. (2019) American Shad demography and motivation: a re-evaluation of Penobscot River American Shad post dam removal. 2019 Maine Sustainability and Water Conference, Augusta, Maine. March 28.	March 2019	It has been hypothesized that the removal of two dams and improved connectivity to the upper Penobscot River will increase population levels of American shad, but also eventually shift population demographics to younger fish single spawn fish. We examined the age structure and iteroparity rates of spawners in 2018 and compared ages and iteroparity rates for shad sampled below Milford Dam (now the lowermost dam) and those that successfully passed.
Peterson, E., and Zydlewski, J. (2019) American Shad demography and motivation: a re-evaluation of Penobscot River American Shad post dam removal. 2019 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. March 26. (Poster)	March 2019	Dam removal on the Penobscot River has led to the access to nearly the complete historic range of American shad. We used telemetry to assess how this new habitat is being used.
Peterson, E., Sheehan, T.F., and Zydlewski, J. (2018) Verification of circulus deposition rates in Atlantic salmon Salmo salar smolts from three Maine rivers. 2018 Atlantic Salmon Ecosystems Forum. January 17. University of Maine, Orono, Maine.	January 2018	Annual patterns of growth are proportionally back-calculated from scale growth rates, but this depends on an assumption that the formation of circuli are constant over time. We used scales from 162 of these fish to calculate circulus deposition rate between known sampling dates.
Peterson, E., Sheehan, T. and Zydlewski, J. (2018) Verification of circulus deposition rates in Atlantic salmon, Salmo salar, smolts from three Maine rivers. 148th Annual Meeting of the American Fisheries Society. Atlantic City, New Jersey. August 20.	August 2018	Annual patterns of growth are proportionally back-calculated from scale growth rates, but this depends on an assumption that the formation of circuli is constant over time. To characterize the formation of circuli in Atlantic salmon during their ocean phase, smolts originating from brood-stock collected from the Dennys, Machias, and East Machias rivers were obtained and raised in marine net pens.
Peterson, E., Rubenstein, S., and Zydlewski, J. (2020) Adult Atlantic Salmon passage at Milford Dam in a changed Penobscot River, Maine. 150th Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 30.	August 2020	We assessed the passage of sea-run adult Atlantic salmon returning to the Penobscot River, Maine using radio telemetry. Across all years, 94% of fish that approached Milford passed successfully, but only 27% passed within the 48-hour window required by FERC.
Peterson, E., Rubenstein, S., and Zydlewski, J. (2020) Movements of radio-tagged Atlantic salmon (Salmo salar) in the Penobscot River, Maine. 2019 Atlantic Salmon Ecosystems Forum.January 14. University of Maine, Orono, Maine.	January 2020	Atlantic salmon (<i>Salmo salar</i>) runs have experienced significant declines due to extensive damming in the Penobscot River, Maine. We tagged and tracked 99 adult Atlantic salmon in 2018-2019 using gastrically implanted radio tags.
Peterson, E., Rubenstein, S., Maynard, G., and Zydlewski, J. (2022)System-wide migratory delays of Atlantic Salmon Salmo salar in the Penobscot River, Maine. 2022 Atlantic Salmon Ecosystems Forum. January 11. University of Maine, Orono, Maine.	January 2022	Delays caused by dams adversely affect adult Atlantic salmon (<i>Salmo salar</i>) as they move from the ocean to their spawning grounds. We used a seven-year dataset of 309 radio-tagged adult Atlantic salmon from the Penobscot River, Maine, to investigate delays and passage efficiency at six main-stem dams.
Peterson, E., Maynard, G. and Zydlewski, J. (2018) Penobscot River Restoration Project, Upstream migrations on the Penobscot River, Maine. Maine Cooperative Fish and Wildlife Research Unit Cooperator’s Meeting, March 22. University of Maine, Orono.	March 2018	Anadromous fish in the Penobscot River have experienced an increase in habitat access after the removal of two main stem dams. We are using telemetry to characterize upstream migration in several species.
Peterson, E., Frechette, D., Thors, R., and Zydlewski, J. (2022) Sea Lamprey Migration and Passage at Milford Dam. 2022 Atlantic Salmon Ecosystems Forum. January 11. University of Maine, Orono, Maine.	January 2022	Restoring sea lamprey and the ecosystem services they provide, therefore, relies on effective fish passage at existing dams. In 2020 and 2021 we assessed the ability of lamprey to find and use the fish lift by tagging fish and releasing them 1 km downstream from the Milford Dam on the Penobscot River.
Peterson, E., Frechette, D., Thors, R., Zydlewski, J. (2021) Migration of adult sea lamprey in the vicinity of the Milford Dam, Penobscot River, ME. 151^st Annual Meeting of the American Fisheries Society. Baltimore, MD. November 6.	November 2021	Because adults must access freshwater rivers in order to spawn, anadromous sea lamprey restoration is impeded by dams and relies on effective fish passage.These data suggest a high capacity for the restoration of these fish in response to effective passage.
Peterson, E., Zydlewski, J. (2020) Movement behavior of American shad five years after dam removal in the Penobscot River, Maine. Penobscot County Conservation Association. Brewer, ME. January 9.	January 2020	Movement behavior of American shad five years after dam removal in the Penobscot River, Maine was studied . Diffeences in motivation, age and spawning experience were assessed.
Peterson, E. and Zydlewski, J. (2019) Movement Behavior of American Shad Five Years After Dam Removal in the Penobscot River, Maine 149th Annual Meeting of the American Fisheries Society. Reno Nevada. September 29.	September 2019	American Shad (Alosa sapidissima) runs have experienced significant declines due to extensive damming in the Penobscot River, Maine. These data provide the first information about movement rates and migratory extents in newly-accessible stretches of the river.
Peterson, E. and Zydlewski, J. (2020) American shad movements in the Penobscot River. Atlantic International Chapter of the American Fisheries Society, Virtual Meeting. August 25.	August 2020	After dam removal in the Penobscot River, American shad have improved access to much of their historic habitat. Movements of fish in this recovering population were discussed.
O’Malley,A., Zydlewski,J., Coghlan, S., Parrish, D. (2013) Assessing a Hatchery Based Rainbow Smelt (Osmerus mordax) Supplementation Effort. Maine Cooperative Fish and Wildlife Research Unit Annual Meeting, University of Maine, Orono, Maine. INVITED. March 21.	March 2013	Description of efforts to mark and track smelt introductions in Maine
O’Malley, A., and Zydlewski, J. (2015) Forage Fish Research and Management Across North America: Parallels and novelties from coast to coast. 145th Annual Meeting of the American Fisheries Society. Portland Oregon. August 16-20 INVITED.	August 2015	Rainbow smelt are an important part of coldwater fish communities in Maine lakes. We sought to assess the efficacy of stocking on supplementing a population.
O’Malley, A., and Zydlewski, J. (2015) Distribution and Abundance of Zooplankton and Larval Fish in Several Small Maine Lakes. Maine Fisheries and Wildlife Cooperative Research Unit, Annual Cooperators Meeting, University of Maine, Orono ME. March 25.	March 2015	The efficacy of rainbow smelt stocking was considered. Data suggest variable results.
O’Malley, A., and Zydlewski, J. (2015) Distribution and Abundance of Zooplankton and Larval Fish in Several Small Maine Lakes. 1st Annual University of Maine Maine Freshwater Science Symposium, University of Maine, Orono ME. January 29.	January 2015	As part of a study on smelt stocking, the distribution of planktonic fish and invertebrates was assessed. Daily and spatial correlates were considered.
O’Malley, A., and Zydlewski, J. (2015) Assessment of a Hatchery Based Rainbow Smelt Supplementation Effort. Maine Department of Inland Fish and Wildlife Baitfish Working Group, Bangor ME. April 15. INVITED.	March 2015	Results from hatchery supplementation of rainbow smelt were presented. Implications for management were considered.
O’Malley, A., and Zydlewski, J. (2015) Assessment of a Hatchery Based Rainbow Smelt Supplementation Effort. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 25.	March 2015	Presentation of the efficacy of smelt stocking methodologies in Maine lakes. Survival was variable from site to site.
O’Malley, A., and Zydlewski, J. (2014) Assessment of a Hatchery Based Rainbow Smelt Supplementation Effort. Maine Department of Inland Fish and Wildlife Divisional Meeting, Bangor ME. INVITED. December 1.	December 2014	Data from lakes stocked with rainbow smelt were presented. Implications for State approaches were considered.
O’Malley, A., Zydlewski, J., and Enterline, C. (2016) Size, age, and longevity of seven populations of landlocked and anadromous rainbow smelt (Osmerus mordax). Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 23.	March 2016	Smelt have declined in New England. Demographic patterns are discussed.
O’Malley, A., Zydlewski, J., and Enterline, C. (2016) Size, age, and longevity of seven populations of landlocked and anadromous rainbow smelt (Osmerus mordax). 2016 Atlantic Salmon Ecosystems Forum. January 6-7. University of Maine, Orono, Maine.	January 2016	We compared ages of smelt using scales and otoliths from four anadromous populations of smelt from coastal Maine. Additionally, we back calculated size at age for the four coastal populations and three landlocked populations from western Maine.
O’Malley, A., Zydlewski, J., Cox, O., Ruksznis, P., Trial, J. (2012)The fate of lower mode Atlantic salmon, Salmo salar, stocked into the Penobscot River, Maine. 2012 Forum, Atlantic Salmon and their Ecosystems, Bangor Maine January 10-11.	January 2012
O’Malley, A., Zydlewski, J. and DeGraaf, D. (2014). Assessment of a hatchery based rainbow smelt, Osmerus mordax, and supplementation effort. 144th Annual Meeting of the American Fisheries Society. Québec City, Canada. August 17-21.	August 2014	The successful development of hatchery cultured smelt has opened a potential new avenue for establishing, maintaining or supporting smelt populations.We sought to assess the efficacy of stocking on supporting or supplementing a smelt population.
Ouimet, A., Vogel, S.K., Loftin, C., Zydlewski, J.D. Investigating collaborative networks: A Maine Co-op case study. [poster] Maine Cooperative Fish and Wildlife Research Unit Annual Meeting. July 12, 2022. Orono, ME.	July 2023	The U.S. Geological Survey’s (USGS) Cooperative Fish and Wildlife Research Units (CRU) program establishes relationships among the USGS, U.S. Fish and Wildlife Service, Wildlife Management Institute, host universities, and state resource agencies. This research focuses on analyzing Unit scientist impacts and outputs by assessing the collaborative networks of the Units and the production of scientific publications as one measure of impact.
Njuguna, E., C. Murphy, C. Loftin, M. Hunter, D. Courtemanch, S. Horn, and P. Njoroge. 2022. Developing a Biotic Index for the Upper Tana Watershed, Kenya, using Community Science. Annual Meeting of the Association of Field Ornithologists, Plymouth, MA, 17-21 October.	October 2022	Measuring ecosystem integrity at a watershed scale often relies on assessments of aquatic macroinvertebrates, fish, and algae, yet indices developed from these taxa may be expensive and time consuming. The popularity of birding and the recent increases in community science projects associated with birds suggest that they may provide a promising alternative. We are developing an avian biotic index to assess the status of the Upper Tana Watershed in Kenya as a case study, using community science
Njuguna, E. Murphy, C.A., Loftin, C., Hunter, M., McGill, B., Courtemanch, D., Njoroge, P. 2024. Bridging community science and standardized bird-based biotic indices to advance watershed monitoring. Presentation to Society for Freshwater Science Annual Meeting. Philadelphia, PA.	June 2024	Measuring ecosystem integrity at a watershed scale may be important to understanding conservation options and setting priorities. Community science bird data applied to watershed bioassessments may present new opportunities to connect avian monitoring with freshwater science while engaging the public.
Murphy, C.A., Zydlewski, J. Gill maggots: helpful or headache? Presentation to the Atlantic Salmon Ecosystems Forum. January 2023. Orono, Maine.	January 2023	Salmon gill maggots can impair respiration and swimming ability for young salmon but may provide insights into important life history events such as repeat spawning. Reduced populations of naturally produced Atlantic Salmon may influence contemporary parasite distributions and abundance.
Murphy, C.A., Olivos, J.A., Johnson, S.L., and Whiles, M.R. Modelling aquatic ecosystems and food webs under global change, Symposium Proposal for the 2022 Joint Aquatic Sciences Meeting, May 14-20 Grand Rapids Michigan	May 2022	Climate change and increased frequency of extreme events have the potential to alter ecological relationships, from physical to chemical to biological interactions. The goal of this session is to exchange ideas on potential climate change impacts and solutions as well as to showcase the many modelling techniques that can be employed to better understand dynamics in streams, lakes and reservoirs.
Murphy, C.A., Olivos, J.A., Arismendi, I., Bellmore, J.R., Johnson, S.L., Dunham, J., Garcia-Berthou, E. 2022. In the GRAND scheme of things: Contributions of barriers and flow alterations to global freshwater fish imperilment. Presentation at the American Fisheries Society Annual Meeting. Spokane, WA.	August 2022	Freshwater fishes are considered to be one of the most endangered groups of animals in the world. We use a large database to examine relationships between RedList status and environmental, social, and taxonomic variables.
Murphy, C.A., Gerth, W., Wallick, J.R., White, J. 2024. Invertebrate Indicators of Environmental Flows in the Willamette Basin, Oregon. Presentation to the Society for Freshwater Sciences Annual Meeting, Philadelphia, PA.	June 2024	Ecological flows are outflows designed to maintain ecological integrity in reaches below dams. However, evaluation of the implementation and effectiveness of these flow regimes can be limited. We discuss one case study in the Willamette Basin, Oregon where environmental flows have been implemented as part of the national Sustainable Rivers Program.
Murphy, C.A. and Arismendi I. Cruising faster than Usain Bolt. For submission as an EcoPic to Frontiers in Ecology and the Environment.	March 2022	<i>Salmincola californiensis</i> are freshwater parasitic copepods of Pacific Salmon and trout (genus <i>Oncorhynchus</i>). While other types of adult copepods are well known for their world record jump speeds, little is known about the speeds of parasitic copepodids.
Murphy, C.A. Understanding PFAS variability in fishes. Maine Sustainability & Water Conference. Augusta, ME.	March 2024	PFAS compounds are of increasing human health and environmental concern. Even with guidance, variability exists in current fish collection methods, sample sizes, species, and waterbodies sampled within and outside of Maine.
Murphy, C.A. Phytoplankton to fish: An ecological exploration of reservoirs. Presentation to the Oregon Lakes Association Meeting. November 15, 2023. Corvallis, OR.	November 2023	Large dams (>15‐m height) have long been recognized as having profound implications for aquatic ecosystems. The reservoirs they create alter sediment and nutrient dynamics, change productivity and associated harmful algal blooms, impede fish migrations, and facilitate the establishment of invasive species. They also provide unique opportunities for fish growth and novel food webs.
Murphy, C.A. 2021. Mothers of Fishes: Inspiration from the Past to the Future. American Fisheries Society Annual Meeting, Baltimore, Maryland.	November 2021	Women have been historically underrepresented, but have played increasing roles, in the American Fisheries Society. As the society passes 150 years, we recognize the importance of pioneering women and their contributions to our profession.
Murphy C.A., Antonelli K., Pollock A., Gerth W. and Arismendi I. (2021). Parasitic Copepodids in Upper Willamette River Reservoirs. Willamette Fisheries Science Review. Virtual stakeholder meeting.	April 2021	Parasitic copepods may limit the survival of outmigrating juvenile Chinook Salmon smolts in the Willamette Basin. Identifying the prevalence and distribution of the infectious copepodid life stage of these parasites may aid in remedial actions and inform downstream passage design.
Molina-Moctezuma, M., and Zydlewski, J. (2020) System-wide survival and movement of Atlantic salmon Salmo salar in the Penobscot River. 150th Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 30.	August 2020	Movement, delays, and apparent survival of hatchery Atlantic salmon <i>Salmo salar</i> smolts were evaluated in open river reaches, and at each dam in the Penobscot River, Maine from 2016 to 2019 (n = 1,536).During these years, survival in each reach of 150 km assessed was high, except for Weldon Dam.
Molina-Moctezuma, A., and Zydlewski, J. (2019) Phenology and energetic effects on Individual physiological response to salinity in Salmo salar juveniles 149th Annual Meeting of the American Fisheries Society. Reno Nevada. September 29.	September 2019	Atlantic salmon smolts incur high mortality during estuary entry in the Penobscot River, in Maine. We studied fasted or fed hatchery-reared smolts that were transferred to seawater (or freshwater control) at three times corresponding to early, peak and late estuary arrival.
Molina-Moctezuma, A., and Zydlewski, J. (2019) Historical movement and survival of Atlantic salmon smolts in the Piscataquis River from 2009-2018. 2019 Maine Sustainability and Water Conference, Augusta, Maine. March 28.	March 2019	During the last decade, the Piscataquis River (a tributary of the Penobscot River) has undergone important changes that have modified the experiences that Atlantic salmon smolts face during their downstream migration. From 2009 to 2017 we used acoustic telemetry to understand the passage and survival of downstream migrants.
Molina-Moctezuma, A., and Zydlewski, J. (2019) Historical movement and survival of Atlantic salmon smolts in the Piscataquis River from 2009-2018. 2019 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. March 26. (Poster)	March 2019	The Piscataquis River has changed over the last decade. We present data on the survival of Atlantic salmon smolts in this system.
Molina-Moctezuma, A., and Zydlewski, J. (2019) A decision-making tool for evaluating biological and statistical thresholds for survival analysis of migrating fishes 149th Annual Meeting of the American Fisheries Society. Reno Nevada. September 29.	September 2019	Quantifying the downstream survival of migrating fish past hydropower dams is critical for conservation efforts. We developed a web-based tool to explore the relationship between these standards using simulated data as a graphic tool for managers and dam owners.
Molina-Moctezuma, A., and Zydlewski, J. (2018) System-wide survival of downstream-migrating Atlantic salmon smolts in the Penobscot River, Maine. 2018 Atlantic Salmon Ecosystems Forum. January 17. University of Maine, Orono, Maine.	January 2018	A hierarchical multistate model was developed to estimate system-wide survival of downstream-migrating Atlantic salmon (Salmo salar) smolts in the Penobscot River, Maine, for 2017. Increased rates of mortality at a given dam were associated with upstream delays.
Molina-Moctezuma, A., and Zydlewski, J. (2018) A decision-making tool for evaluating biological and statistical thresholds for survival analysis. 74th Annual Northeast Fish & Wildlife Conference. April 15. Burlington, Vermont.	April 2018	Quantifying the downstream survival of migrating fish past hydropower dams is critical for conservation efforts. We have developed a web-based tool that explores and graphically compared these thresholds as a tool for managers and dam owners involved in the assessment of fish survival.
Molina-Moctezuma, A., and Zydlewski, J. (2017)Assessing Atlantic salmon downstream migration in a changing system (Penobscot River, Maine) Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 22.	March 2017	Quantifying the downstream survival of migrating fish past hydropower dams is critical for conservation efforts. We have developed a web-based tool that explores and graphically compared these thresholds as a tool for managers and dam owners involved in the assessment of fish survival.
Molina-Moctezuma, A., and Zydlewski, J. (2017) A decision making tool for evaluating biological and statistical thresholds for survival analysis. 147th Annual Meeting of the American Fisheries Society. Tampa, FL. August 20.	August 2017	Quantifying the downstream survival of migrating fish past hydropower dams is critical for conservation efforts. We have developed a web-based tool that explores and graphically compared these thresholds as a tool for managers and dam owners involved in the assessment of fish survival.
Molina-Moctezuma, A., and Zydlewski, J. (2016) Behavioral characterization of downstream-migrating Atlantic salmon smolts in the estuary of the Penobscot River, Maine. Maine146th Annual Meeting of the American Fisheries Society. Kansas City, MO. August 23.	August 2016	The estuary phase is critical in the Atlantic salmon, Salmo salar, downstream migration. we present data from more than 2,000 Atlantic salmon juvenile fish that have been acoustically tagged and released in the upper Penobscot River in the last 10 years.
Molina-Moctezuma, A., and Zydlewski, J. (2022) Effects of flow on system-wide survival and movement of Atlantic salmon, Salmo salar, in the Penobscot River. 2022 Atlantic Salmon Ecosystems Forum. January 11. University of Maine, Orono, Maine.	January 2022	We modeled the effects of flow on survival of downstream migrating Atlantic salmon smolts. Movement, delays, and apparent survival of hatchery smolts (n = 1,536) were evaluated in open river reaches and at dam in the Penobscot River, Maine. High flows not only increased survival directly at most dams, but also increased survival by reducing delays.
Molina-Moctezuma, A., Stich, D., and Zydlewski, J. (2016)Post-restoration assessment of Atlantic salmon (Salmo salar) survival during their downstream migration in the Penobscot River, Maine. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 23.	March 2016	Atlantic salmon incur high mortality past dams in the Penobscot River. Patterns of survival post restoration activities are discussed.
Molina-Moctezuma, A., Stich, D., and Zydlewski, J. (2016)Post-restoration assessment of Atlantic salmon (Salmo salar) survival during their downstream migration in the Penobscot River, Maine. 2016 Atlantic Salmon Ecosystems Forum. January 6-7. University of Maine, Orono, Maine.	January 2016	We evaluated survival, path choice and movements of Atlantic salmon smolts during their downstream migration after dam removal. All survival and movement estimates were compared to results obtained prior to the Penobscot River restoration (2005 – 2014).
Molina-Moctezuma, A., Peterson, E., and Zydlewski, J. (2020) Movement and survival of Atlantic salmon, Salmo salar, in the Piscataquis River. 2019 Atlantic Salmon Ecosystems Forum. January 14. University of Maine, Orono, Maine.	January 2020	Movement, delays, and survival of hatchery Atlantic salmon <i>Salmo salar</i> smolts were evaluated through the Piscataquis River, a tributary of the Penobscot River, in Maine, USA. Overall, while survival through Howland Dam has improved, in aggregate, passage and delays caused by the three upstream dams represent a critical impediment to the effective use of the high spawning habitat found upstream.<br>
Molina Moctezuma, A., and Zydlewski, J. (2018) System-wide survival of downstream-migrating Atlantic salmon smolts in the Penobscot River, Maine in 2017. 148th Annual Meeting of the American Fisheries Society. Atlantic City, New Jersey. August 20.	August 2018	A hierarchical multistate model was developed to estimate system-wide survival of downstream-migrating Atlantic salmon (Salmo salar) smolts in the Penobscot River, Maine, for 2017. A multi-release approach with six release sites and two release dates was used.
Molina Moctezuma, A., and Zydlewski, J. (2018) Assessing Atlantic salmon downstream migration in a changing system (Penobscot River, Maine). Maine Cooperative Fish and Wildlife Research Unit Cooperator’s Meeting, March 22. University of Maine, Orono. 22. University of Maine, Orono.	March 2018	Atlantic salmon smolts suffer high mortality during downstream migration in the Penobscot River. We are using telemetry to estimate system-wide survival.
Merriam, C., Frechette, D., and Zydlewski, J. (2024) Reinstating Atlantic salmon's natural spawning and life cycle: Movement and survival of Atlantic salmon in Maine. The Atlantic Salmon Ecosystems Forum, University of Maine, Orono, Maine. January 9.	January 2023	Atlantic salmon are iteroparous and capable of spawning multiple times in their lifetime. However, repeat spawners are rare and post-spawn survival and behavior of downstream migrating salmon are poorly characterized.
Merriam, C., Frechette, D., and Zydlewski, J. (2024) Navigating Barriers: The Continuing Impact of Dams on Atlantic Salmon in Maine. 154th Annual Meeting of American Fisheries Society, Honolulu, Hawai’i. September 15.	September 2024	We used acoustic telemetry to monitor two groups of adult Atlantic salmon: 1) pre-spawn fish from a seawater smolt-to-adult supplementation program and 2) post-spawn sea-run returns used for hatchery broodstock. We observed clear behavioral differences between the post-release period.
Merriam, C., Frechette, D., Gardner, A., and Zydlewski, J. (2023) Adult Atlantic Salmon Movements and Survival in the Penobscot and Machias Rivers. 153rd Annual Meeting of American Fisheries Society, Grand Rapids, Michigan. August 20.	August 2023	Atlantic salmon are iteroparous and capable of spawning multiple times in their lifetime. In this study we use acoustic telemetry to monitor three groups of adult Atlantic salmon.
Merriam, C., Zydlewski, J., and Frechette, D. (2022) Survival and Behavior of Downstream Migrating Post-Spawn Atlantic Salmon. The Atlantic International Chapter of the American Fisheries Society. Newry, Maine. September 18.	September 2022	Survival and Behavior of Downstream Migrating Post-Spawn Atlantic Salmon.
Mensinger, M., Zydlewski, J., and Blomberg, E. (2019) Does American Eel Personality Explain Variation in Juvenile Dispersal? 149th Annual Meeting of the American Fisheries Society. Reno Nevada. September 29.	September 2019	We consider variation in eel personality as a potential mechanism to describe this facultative dispersal, where bolder individuals, with greater exploratory behavior, may be more likely to move upstream.Our results provide context for the presence of personality differences in juvenile American eels, which may have implications for inland dispersal.
Mensinger, M., Zydlewski, J., and Blomberg, E. (2019) American eels incur high mortality at dams during seaward migration in the Penobscot River. 2019 Maine Sustainability and Water Conference, Augusta, Maine. March 28.	March 2019	American eels, Anguilla rostrata, embark on one of the most expansive spawning migrations of any diadromous fish species in the fall. To understand the effects of dam passage in the Penobscot River during this life-cycle stage, we captured and implanted acoustic telemetry tags into 100 silver-stage eels annually from 2016-2018 (n= 300).
Mensinger, M., Zydlewski, J., and Blomberg, E. (2019) American eels incur high mortality at dams during seaward migration in the Penobscot River. 2019 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. March 26. (Poster)	March 2019	American eels are in decline. We present data on mortalities at dams on the Penobscot River
Mensinger, M., Zydlewski, J., and Blomberg, E. (2019) American Eels Incur Mortality and Delay at Hydroelectric Dams During Seaward Migration in the Penobscot River, Maine. 149th Annual Meeting of the American Fisheries Society. Reno Nevada. September 29.	September 2019	To understand the consequences of dam passage in the Penobscot River, Maine, we captured and implanted acoustic transmitters into adult eels from 2016–2018 (n=300). The reduced survival and impeded migration speed for these fish underscores the negative role dams have in American eel conservation efforts.
Mensinger, M., Zydlewski, J., Blomberg, E., and Mortelliti, A. (2020) Evidence of personality in juvenile American eels and implications for upstream movement. 150th Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 30.	August 2020	American eels (<i>Anguilla rostrata</i>) begin life in the Sargasso Sea, and juveniles persist throughout coastal watersheds in marine, estuarine, and freshwater environments. We considered whether personality might be causal to this variation, where bolder individuals may explore and move into upriver habitat.
Mensinger, M., Mortelliti, A., and Zydlewski, J. (2023) How does Atlantic salmon smolt size influence predation risk. 153rd Annual Meeting of American Fisheries Society, Grand Rapids, Michigan. August 20.	August 2023	Though hatchery-reared smolts are not pre-disposed to predator cues, their larger size may help to counteract predation risk, especially in areas with gape-limited predators . In this study, we evaluated predation risk between standard- (175–220mm FL) and wild-sized (135–165mm FL) hatchery-reared smolts using acoustic telemetry with predation indicators and Predation Event Recorders (PERs) that allow us to directly assess predation on tethered fish.
Mensinger, M., Hawkes, J., Goulette, G., Mortelliti, A., and Zydlewski, J. (2024) To catch a predator – Using telemetry and tethering to characterize smolt predation in the Penobscot River. The Atlantic Salmon Ecosystems Forum, University of Maine, Orono, Maine. January 9.	January 2023	Predation has long been assumed to be a leading source of smolt mortality, but there remains relatively little information on the extent of predation incurred by smolts in the Penobscot River. We used telemetry (acid-sensitive predation transmitters; n=270) and tethering of smolts (n=675) to characterize predation risk throughout the main-stem of the Penobscot River.
Mensinger, M., Hawkes, J., Goulette, G., Mortelliti, A., and Zydlewski, J. (2024) Changes in Atlantic salmon smolt survival following large-scale river restoration in the Penobscot River, Maine. 154th Annual Meeting of American Fisheries Society, Honolulu, Hawai’i. September 15.	September 2024	We used 17 years of acoustic telemetry data to understand how watershed-level changes influence Atlantic salmon smolt survival in the Penobscot River estuary. We are using a CJS model to estimate estuarine survival for 3,600 smolts between 2005–2023.
Mensinger, M., Hawkes, J., Goulette, G., Mortelliti, A., and Zydlewski, J. (2022) Using acoustic predator tags to characterize predation on Atlantic salmon smolts. 2022 Atlantic Salmon Ecosystems Forum. January 11. University of Maine, Orono, Maine.	January 2022	Juvenile salmon (smolts) migrate seaward after 2–3 years of rearing in freshwater and mortality during this 4–6 week emigration period is naturally high. In 2021, we tagged 72 smolts with acoustic “predator” tags which enabled us to recognize predation events and identify body temperatures of the predator species.
Mensinger, M., Hawkes, J., Goulette, G., Mortelliti, A., and Zydlewski, J. (2021) Using acoustic telemetry to characterize predation on Atlantic salmon smolts. 151st Annual Meeting of the American Fisheries Society. Baltimore, MD. November 6.	November 2021	As part of ongoing research in the Penobscot River, >5000 smolts have been tagged with acoustic transmitters and tracked to better understand behavior and to characterize survival during this vulnerable migration stage. We analyzed telemetry tracks from 2005–2019 and defined a series of <i>a priori </i>conditions to distinguish predator behavior (e.g., excessive swimming speed, upstream movements, skipped receivers) from “normal” smolt behavior.
Mensinger, M., Casey, A., Mortelliti, A., and Zydlewski, J. (2022) Using Predation Event Recorders to directly observe predation on Atlantic salmon smolts. 2022 Oregon Chapter of the American Fisheries Society, 58th Annual Meeting. March 2. Virtual.	March 2022	Traditional methods used to assess fish predation are often speculative, limited in their temporal and spatial resolution, and rarely identify the predator. The recent development of Predation Event Recorders (PERs) to study Pacific salmon predation may offer analogous insight into predation risk of Atlantic salmon during smolt migration.
Mensinger, M., Casey, A., Mortelliti, A., and Zydlewski, J. (2022) Direct observation of Atlantic salmon smolt predation during reservoir migration in the Penobscot River, Maine, USA. 152^st Annual Meeting of the American Fisheries Society. Spokane, WA.	August 2022	The migratory smolt stage is the focus of considerable conservation effort for both wild and hatchery emigrants. In spring 2022, we used Predation Event Recorders (PERs) to investigate smolt predation in the Weldon Dam reservoir.
Mensinger, M., Casey, A., Mortelliti, A., and Zydlewski, J. (2021) Using Predation Event Recorders to directly observe predation on Atlantic salmon smolts. 151^st Annual Meeting of the American Fisheries Society. Baltimore, MD. November 6.	November 2021	Atlantic salmon are exposed to a suite of risks across all stages of their complex, diadromous life cycle.We show direct evidence of predation on Atlantic salmon smolts and highlight the advantages of using Predation Event Recorders beyond traditional methods to measure predation risk.
Mensinger, M., Casey, A., Mortelliti, A., and Zydlewski, J. (2022) Water temperature and smolt size influence predation risk during reservoir migration. The Atlantic International Chapter of the American Fisheries Society. Newry, Maine. September 18.	September 2022	Water temperature and smolt size influence predation risk during reservoir migration
Mensinger, M., Brehm, A., Mortelliti, A., Blomberg, E., and Zydlewski, J. (2022) American eel personality and body size influence passage success in an experimental fishway. 2022 Atlantic Salmon Ecosystems Forum. January 11. University of Maine, Orono, Maine.	January 2022	Fishways offer upstream passage opportunities, but artificial selection may be imposed by these structures. Using juvenile American eel <i>Anguilla rostrata </i>as a model species, we consider whether individual differences in behavior (i.e., personality) and fish size can predict passage success.
Mensinger, M., Blomberg, E., and Zydlewski, J. (2020) Dams, death, and delay in the Penobscot River - the complex and cumulative influence of hydropower dams on migrating American eels 2019 Atlantic Salmon Ecosystems Forum. January 14. University of Maine, Orono, Maine.	January 2020	In impounded watersheds, many migrating adult American eels must navigate hydroelectric dams. To understand the consequences of dam passage in the Penobscot River, Maine, we captured and implanted acoustic transmitters into adult eels from 2016–2019 .
Mensinger, M., Blomberg, E., and Zydlewski, J. (2020) American eel survival in an impounded river system. Atlantic International Chapter of the American Fisheries Society, Virtual Meeting. August 25.	August 2020	American eel survival in the Penobscot River was assessed. patterns of movement, delay and migration were considered.
Mensinger, Blomberg, E. and Zydlewski, J. (2020) Understanding the influence of dams on migrating eels in the Penobscot River. Penobscot County Conservation Association. Brewer, ME. January 9.	January 2020	The influence of dams on migrating eels in the Penobscot River was assessed. Delays and mortalities were quantified at two dams.
McKinney, S.T., and D.F. Tomback. The viability of evolutionary rescue in natural populations. Society for Conservation Biology North America Congress for Conservation Biology, Missoula, MT.	July 2014	This study evaluates the potential efficacy of evolutionary rescue in natural populations through an applied field study of a federally endangered species.
McKinney, S. T., and D. F. Tomback. Invasive pathogen trumps natural selection thwarting evolutionary rescue. The Ecological Society of America Annual Meeting, Minneapolis, MN.	August 2013	This study demonstrates that severe tree mortality from an introduced pathogen alters interspecific relationships in a high-elevation forest community, further hastening the decline and preventing the opportunity for natural selection and evolutionary rescue. The work is important because it will help guide restoration of a keystone and endangered species.
McKinney, S. T. Trophic cascades and functional losses: Using models of species interactions to restore and imperiled ecosystem. Maine Department of Inland Fisheries and Wildlife, Bangor, Maine.	March 2012
Maynard,G., Kinnison, M., and Zydlewski, J. (2016) Size Matters: Fishways can exert size selection in Atlantic salmon migrating in the Penobscot River. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 23.	March 2016	Fishways are demonstrated to exert size selection in Atlantic salmon migrating in the Penobscot River. Demographic consequences are considered.
Maynard,G., Dill, R., Kinnison, M., Halteman, W., and Zydlewski, J. (2016) Size Matters: Fishways can exert size selection in Atlantic salmon migrating in the Penobscot River. 2016 Atlantic Salmon Ecosystems Forum. January 6-7. University of Maine, Orono, Maine.	January 2016	We investigated the influence of fish size on successful passage through six fishways at hydropower dams on the Penobscot River by tracking Atlantic salmon upstream migration through the system with PIT tags from 2002-2004 and 2010-2012. Passage success at fishways was modeled as a Bayesian logistic regression that included fish size, environmental variables (temperature, flow, timing), and in-river delay as possible predictors of passage success.
Maynard, J. and Zydlewski, J. (2014) Size selection of adult Atlantic salmon at fish passage facilities on the Penobscot River, Maine. 144th Annual Meeting of the American Fisheries Society. Québec City, Canada. August 17-21.	August 2014	Passage success of adult Atlantic salmon was investigated at six fishways at hydropower dams in the lower Penobscot River. At passage facilities in the lower river, success was negatively related to fork length, meaning that those facilities may have been exerting size-selective pressure.
Maynard, G., and Zydlewski, J. (2015) Size selection of adult Atlantic salmon at fish passage facilities. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 25.	March 2015	Passage of adult salmon was assessed using PIT telemetry. Data indicate a strong size selective pressure.
Maynard, G., and Zydlewski, J. (2014) Size selection of adult Atlantic salmon at fish passage facilities on the Penobscot River, Maine. 2014 Atlantic Salmon and Their Ecosystems Forum, University of Maine, Orono. January 8.	January 2014	Adult Altantic salmon must pass multiple dams in order to reach spawning habitat in the Penobscot River. PIT telemetry data are presented that reveal a strong size selective influence on passage success of large adults past several dams.
Maynard, G., Zydlewski, J., and Blomberg, E. (2016) Simulated demographic and evolutionary impacts of size-selective passage at dams on Atlantic salmon body size. Maine146th Annual Meeting of the American Fisheries Society. Kansas City, MO. August 23.	August 2016	Atlantic Salmon have a complex life history that involves a multi-year freshwater juvenile phase, several years maturing at sea, and an eventual return to their natal rivers to spawn.We used an individual based model to explore the possible influence of dam-mediated size selection on a population of Atlantic Salmon in the Penobscot River, Maine.
Maynard, G., Zydlewski, J., Halteman, W., and Blomberg, E. (2015) University Bayesian Analysis of Size-Selective Pressure Exerted on In-Migrating Atlantic Salmon by Fish Passage Facilities on the Penobscot River, Maine. 145th Annual Meeting of the American Fisheries Society. Portland Oregon. August 16-20 INVITED.	August 2015	Successful upstream passage of Atlantic salmon through dams is critical to the long-term stability of sea-run populations. The influence of size on passage success of adult Atlantic Salmon was investigated at six fishways at hydropower dams in the Penobscot River.
Maynard, G., Zydlewski, J., and Kinnison,M. (2022) Demographic and Evolutionary Impacts of Size Selection at Fish ways on Atlantic Salmon. 2022 Atlantic Salmon Ecosystems Forum. January 11. University of Maine, Orono, Maine.	January 2022	The migratory routes of Atlantic salmon have been fragmented throughout their range by damming.To determine whether selection at dams can drive evolution of Atlantic salmon, we used an individual-based model under selective pressure previously documented in the Penobscot River to simulate a population of Atlantic salmon in a simplified, relatively small river (~89 rkm) system and followed it over a 100-year period.
Maynard, G., Kinnison, M., and Zydlewski, J. (2017) Demographic and evolutionary impacts of size selection at fishways on Atlantic Salmon. 147th Annual Meeting of the American Fisheries Society. Tampa, FL. August 20.	August 2017	Atlantic Salmon have a complex life history that involves a multi-year freshwater juvenile phase, several years maturing at sea, and an eventual return to their natal rivers to spawn. This work demonstrates the potential for size selective fish passage at dams to have unintended demographic impacts.
Maynard, G., Kinnison, M., and Zydlewski, J. (2017) Assessing Anadromous Fish Migrations and Habitat Connectivity Following a Major Restoration Effort in the Penobscot River, Maine Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 22.	March 2017	Range-wide, anadromous fish have been impacted by the construction of dams. Changes in the Penobscot Rivere were considered after restoration actions.
Maynard, G. and Zydlewski, J. (2015) Size selection of adult Atlantic salmon at fish passage facilities. NOAA National Hydropower Program Meeting. Gloucester, MA. July 9. INVITED	July 2015	Atlantic salmon must pass dams to reach spawning habitat. Data was presented which demonstrates a size selection pressure on adult migrants.
Maynard, G. and Zydlewski, J. (2015) Size selection of adult Atlantic salmon at fish passage facilities. 1st Annual University of Maine Freshwater Science Symposium, University of Maine, Orono. January 29.	January 2015	PIT telemetry was used to track adult Atlantic salmon. The data indicate a size selective effect of fish way passage.
Maynard, G. ., Zydlewski, G., and Zydlewski, J. (2017) Use of Newly Available Habitat Following Dam Removal: Tracking American Shad in the Penobscot River. 147th Annual Meeting of the American Fisheries Society. Tampa, FL. August 20.	August 2017	American Shad were thought to be extirpated from the Penobscot River until observed using DIDSON in 2010-2011. Following removal of Veazie Dam and the next dam upstream (Great Works), we tracked movements of American Shad that now had access to 20 km of previously unavailable habitat before reaching the first mainstem dam at Milford, Maine.
Linden, Daniel, W., and Shawn T. McKinney. Integrated population modeling of American black bears: An application of robust-design spatial capture-recapture combined with mark-recovery and recruitment. International Statistical Ecology Conference, Montpellier, France.	July 2014	This work utilizes multiple data sets, spanning 39 years, to construct an integrated population model that will allow the state of Maine to derive more information and evaluate their monitoring program.
Linden, Daniel W., and Shawn T. McKinney. Using all the data: Improving inferences from population models. Eastern Black Bear Workshop, Millinocket, ME.	April 2013	Results from this modeling study will help the state of Maine develop a more accurate and cost-effective approach to monitoring black bear population dynamics.
Linden, Daniel W., and Shawn T. McKinney. Improved inferences on population dynamics of black bears in Maine through integrated modeling. The Wildlife Society Annual Conference, Milwaukee, WI.	October 2013	Results from this modeling study will help the state of Maine develop a more accurate and cost-effective approach to monitoring black bear population dynamics.
Letcher, B. J.Zydlewski, T. Dubreuil, M. O'Donnell and B. Connery (2006) Brook trout growth and movements in a Maine coastal stream, Stanley Brook. Northeast sea-run trout meeting 2006. U.S. Fish and Wildlife Service, Hadley, MA.. December 6.	December 2006
Larson, M., Couch, C., Murphy, C.A., Diet and Philonema infections in reservoir-rearing juvenile Chinook Salmon (Oncorhynchus tshawytscha). To be presented at the Oregon Chapter of the American Fisheries Society, Eugene, OR.	March 2023	Chinook Salmon rearing in Lookout Point Reservoir were piscivorous in late summer. These juveniles also had unexpectedly high burdens of a parasitic nematode transmitted by free-living copepods.
Kurth, J.E., C.S. Loftin, J.Rhymer, and J. Zydlewski. Conservation via translocation of freshwater mussels threatened by habitat alteration, presented at the 5th Biennial Symposium of the Freshwater Mollusk Conservation Society, March 12-15, 2007, Little Rock, Arkansas	March 2007
Kurth, J.E., C.S. Loftin, J.D. Zydlewski, and J.M. Rhymer. 2005. Use of PIT tags to track freshwater mussels in Maine. Freshwater Mollusk Conservation Society Symposium, 15-18 May, St. Paul, MN. Poster (Abstract)	May 2005
Kurth, J.E., C.S. Loftin, J. Zydlewski, and J.Rhymer. 2008. Multi-stage approach using population surveys and pit tags to assess suitability of translocation sites for freshwater mussels threatened by impending dam removal. Presentation to the Annual Meeting of the North American Benthological Association, 25-30 May, Salt lake City, UT.	May 2008
Kurth, J.E., C.S. Loftin, J. Zydlewski, and J.Rhymer. Multi-stage approach using population surveys and pit tags to assess suitability of translocation sites for freshwater mussels threatened by impending dam removal. Presentation to the Annual Meeting of the North American Benthological Association, 25-30 May, Salt lake City, UT.	May 2008
Kurth, J.E., C.S. Loftin, J. Zydlewski, and J.Rhymer. 2008. Multi-stage approach using population surveys and pit tags to assess suitability of translocation sites for freshwater mussels threatened by impending dam removal. Presentation to the Annual Meeting of the North American Benthological Association, 25-30 May, Salt lake City, UT.	May 2008
Kurth, J.E., C.S. Loftin, J. Zydlewski, and J. Rhymer. 2006. Methods for relocation of freshwater mussels threatened by habitat alteration (dam removal) on the Sebasticook River, 12th Annual Maine Water Conference, 22 March, Augusta, ME.	March 2006
Kurth, J., Loftin, C., Zydlewski, J., Rhymer, J. (2008) Multi-stage approach using adaptive sampling and pit tags to assess suitability of translocation sites for freshwater mussels threatened by impending dam removal. NABS 56th Annual Meeting, Salt Lake City, Utah. May 29. INVITED.	May 2008
Kurth, J., Loftin, C., Zydlewski, J. and Rhymer, J. Use of PIT tags to track fresh water mussels. Freshwater Mollusk Conservation Society Symposium in St. Paul, MN. May 15-18, 2005	January 2005
Kurth, J., Loftin, C., Zydlewski, J. and Rhymer, J. 2005. Use of PIT tags to track fresh water mussels. Freshwater Mollusk Conservation Society Symposium in St. Paul, MN. May 15-18, 2005	January 2005
Kronisch, G.R., Furey, N.B., Kinnison, M.T., Murphy, C.A., Schumacher, G.T., Banister, T. (2024) Fine-scale Habitat Use by Landlocked Arctic Charr (Salvelinus alpinus) in a Maine, USA Lake. Presentation for OTN Symposium. Halifax, Nova Scotia.	September 2024	Arctic charr (<i>Salvelinus alpinus</i>) is a holarctic salmonid whose southern range limit extends to Maine, USA, where it is considered a “Species of Greatest Conservation Need”. As part of a larger study to understand how alternate phenotypes might influence vulnerability to climate change, we are examining fine scale movements and habitat use of a large piscivorous form of Arctic charr in Floods Pond, Otis, Maine.
Krohn, W.B. Maine's changing wildlife populations: a historical perspective. Invited presentation to the Downeast Salmon Federation, University of Maine, Machias, ME.	March 2005
Krohn, W. B., and M. R. Massaro. Fur into feathers: Manly Hardy and his collection of North American birds. 2004 Dublin Seminar for New Folklife Entitled New England Collectors and Collections, Deerfield, MA.	June 2004
Krohn, W. B., and E. R. Simons. Using historical data to determine the contemporary distribution of Canada lynx: a cautionary note. Canada Lynx on the Border: Biological and Political Realities for Conservation Planning. International Workshop Organized by the University of Minnesota, Grand Portage, MN.	October 2007
Krohn, W. B., J. A. Homyack, and D. J. Harison. Changes in the Acadian forest of the Northeast: implications for wildlife. Abstract and presentation at the 2003 Northeast Fish and Wildlife Conference, Newport, RI.	April 2003
Krohn, W. B., Harrison, D. J., and L. Robinson. Recent findings on the relationships among partial harvesting, snowshoe hares, and Canada lynx occurrences in northern Maine. Meeting of the Interagency (Federal) Lynx Biology Group, Duluth, MN.	October 2006
Krohn, W. B., D. J. Harrison, and M. A. McCollough. Predicting responses of snowshoe hares and Canada lynx to alternative forest harvesting scernarios across multiple scales. Wildlife Management Institute's Eastern Lynx Workshop, North Conway, NH.	January 2004
Krohn, W. B., D. J. Harrison, S. A. Scott, L. L. Robinson, C. L. Hoving, A. K. Fuller, and E. M. Simons. “Variation in Snowshoe Hare Densities as Related to Canada Lynx and Forest Management in Eastern North America.” Eastern Canada/U.S.A. Forest Science Conference, University of Maine, Orono.	October 2008
Krohn, W. B. Historic occurrences of fishers and martens in eastern North America: a preliminary evaluation of factors affecting broad-scle distribution. Abstract and presentation at the Tenth Annual Conference of The Wildlife Society, Burlington, VT.	September 2003
Krohn, W. B. Cormorants and eagles: indicators of ecological change and integrity in a large riverine system. Invited presentation (and printed abstract) at the Penobscot River Science Form, University of Maine, Orono, ME.	October 2005
Krohn, W. B. Changing forestry practices and the habitat ecology of snowshoe hare and Canada lynx in Maine: new projects at the University of Maine. Invited presentation at the Wildlife Conservation Society's workshop on lynx and marten conservation in the northeastern USA and eastern Canada. Portland, ME.	December 2005
Krohn, W. B. April, 2001. Proposed tests for determining factors affecting the distributions of fishers and martens. Annual Meeting of the Northeast Fur Technical Committee, Province, RI.	September 2001
Krohn, W. B. April, 2001. Cooperative lynx research at the Maine Cooperative Fish and Wildlife Research Unit. Meeting held with Region 5 of the U.S. Fish and Wildlife Servcie at the 57th Northeast Fish and Wildlife Conference, Saratoga Springs, NY.	April 2001
Krohn, W. B. "Distributional dynamics of Martes in eastern North America: spaciotemporal analyses of historical patterns, 1699-2001.” Invited presentation at the 5th International Martes Symposium, University of Washington, Seattle.	September 2009
Kocik, J.F., Cieri, M., Goulette, G., Manning, J., Renkawitz, M., Sheehan, T., Tierney, D., Welch, L., and Zydlewski, J. (2018) Partitioning the Big Blue Box: A Synthesis of Marine and Estuary Action Team Science. 2018 Atlantic Salmon Ecosystems Forum. January 17. University of Maine, Orono, Maine.	January 2018	A major threat to Gulf of Maine (GOM) Atlantic salmon is mortality in the estuary and ocean. The Marine and Estuary Action Team has identified four critical areas of research need: 1) estuary transition for smolts; 2) predation in coastal systems, 3) adult fishing mortality; and 4) climate change related ecosystem shifts.
Kocik, J., Hawkes, J., Stich, D., Zydlewski, J., Dever, M., and Byron, C. (2014) Migration Timing of Atlantic Salmon Smolts from Penobscot Bay to the Scotian Shelf. 2014 Atlantic Salmon and Their Ecosystems Forum, University of Maine, Orono. January 8.	January 2014	Marine survival is a critical factor limiting recovery of Gulf of Maine Atlantic salmon.We used these tracks in conjunction with oceanographic and bioenergetics models to identify probable migration routes of post smolt Atlantic salmon.
Kocik, J. F., J. P. Hawkes, D. Stich, J. Zydlewski, M. Dever, C. Byron and A. Lamont (2012) Blue Highways: the migration ecology of Atlantic salmon from Maine estuaries to the Scotian Shelf. Oral presentation at the 142nd Annual Meeting of the American Fisheries Society, Minneapolis-St. Paul, MN.	August 2012
Kiraly, I.A., Coghlan, S.M.C., Zydlewski, J., and D. Hayes. 2012. Quantifying the structure of fish assemblages in the Penobscot River in order to assess change due to dam removal. Maine Water Conference, Augusta, ME. March 21.	March 2012
Kiraly, I.A., Coghlan, S.M.C., Zydlewski, J., and D. Hayes. 2011. Annual update: Quantifying the effects of dam removal on the structure and function of fish assemblages in the Penobscot River. Penobscot River Restoration Trust Annual Meeting, Orono, ME. November 15, 2011.	November 2011	Presentation on the community structure in the Penobscot River prior to restoration
Kiraly, I.A., Coghlan, S.M.C., Zydlewski, J., and D. Hayes. (2012) The structure of fish assemblages in the Penobscot River prior to dam removal. Veazie Salmon Club Meeting: The State of the River, Veazie, ME. January 18. INVITED.	January 2012	The structure of fish assemblages in the Penobscot River prior to dam removal.
Kiraly, I.A., Coghlan, S.M.C., Zydlewski, J., and D. Hayes. (2012) The structure of fish assemblages in the Penobscot River prior to dam removal. Veazie Salmon Club Meeting: The State of the River, Veazie, ME. January 18. INVITED.	January 2012
Kiraly, I., Coghlan, Jr., S.M., Zydlewski, J., and Hayes, D. (2011) Quantifying the Effects of Dam Removal on the Structure and Function of Fish Assemblages in the Penobscot River. 141th Annual Meeting of the American Fisheries Society. Seattle, Washington. September 4-9.	September 2011
Kazyak, D., Zydlewski, J., and Letcher, B. (2009) Movement and habitat use of brook charr in coastal Maine. 139th Annual Meeting of the American Fisheries Society. Nashville Tennessee. August 30-September 3	August 2009
Kazyak, D., Zydlewski, J., and Letcher, B. (2009) Movement and habitat use of brook charr in coastal Maine. 139th Annual Meeting of the American Fisheries Society. Nashville Tennessee. August 30-September 3.	September 2009
Kazyak D.C., Zydlewski, J., Letcher, B.(2010) Movement and growth of brook charr (Salvelinus fontinalis) in coastal Maine. 140th Annual Meeting of the American Fisheries Society. Pittsburgh, Pennsylvania. September 13-16.	September 2010
Katz, L., Coghlan, Jr., S., Kinnison, M., York, G., and Zydlewski, J. (2023) Bridle shiner distribution and habitat in Maine: A multi-method approach. 153rd Annual Meeting of American Fisheries Society, Grand Rapids, Michigan. August 20.	August 2023	Bridle Shiner populations have faced steep declines across their native range, and their status in Maine was unknown. The goal of this project was to assess the presence of this species and provide a foundation for future long-term monitoring.
Katz, L., Coghlan, Jr., S., Kinnison, M., York, G., and Zydlewski, J. (2022) Assessing the Distribution and Abundance of Bridle Shiners in Maine. 152^stAnnual Meeting of the American Fisheries Society. Spokane, WA.	August 2022	Bridle shiners (<i>Notropis bifrenatus</i>) are one of Maine’s native species of freshwater minnow and are listed as a “species of special concern” in the state. The goal of this project is to assess the status of this species and provide a foundation for future long-term monitoring in Maine.
Katz, L., Coghlan, Jr., S., Kinnison, M., York, G., and Zydlewski, J. (2022) Assessing the Distribution and Abundance of Bridle Shiners in Maine. The Atlantic International Chapter of the American Fisheries Society. Newry, Maine. September 18.	September 2022	Assessing the Distribution and Abundance of Bridle Shiners in Maine.
Joshua Gross Rich (1820-1897): Western Maine Pioneer and Wildlife Writer, Presentation to the Rangeley Lakes Regional Historical Society, Rangeley, ME.	August 2008
Johnston, C., Zydlewski, G., Zydlewski,J., Kinnison, M., and Smith, S. (2016) Shortnose sturgeon spawning potential in the Penobscot River after dam removals. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 23.	March 2016	Shortnose sturgeon in the Penobscot River have yet to be observed spawning. Patterns of movement are discussed.
Johnston, C., Zydlewski, G., Zydlewski,J., Kinnison, M., and Smith, S. (2016) Shortnose sturgeon spawning potential in the Penobscot River after dam removals. 2016 Atlantic Salmon Ecosystems Forum. January 6-7. University of Maine, Orono, Maine.	January 2016	Recently the two lowermost dams were removed from the Penobscot River, Maine, restoring 14 km of diadromous fish habitat. Endangered shortnose sturgeon have been documented foraging and wintering in the Penobscot River but there has been no indication of spawning since monitoring began in 2007. In October 2015, three tagged female shortnose sturgeon were detected on receivers upstream of the previous Veazie Dam site, in the dam head pond at rkm 48, and at rkm 53. This demonstrates that under ce
Johnston, C., Zydlewski, G., Zydlewski, J., Kinnison, M., Lachapelle, K. and Ames, C. (2017) Shortnose Sturgeon use of the Penobscot River in the first years after dam removal. 147th Annual Meeting of the American Fisheries Society. Tampa, FL. August 20.	August 2017	Recent dam removals from the Penobscot River, Maine restored access to freshwater habitat critical for the life cycle of endangered Shortnose Sturgeon.In October 2015 and summer 2016, individuals were documented moving into the reaches made available by the dam removals. These movements suggest that future upstream migrations to spawning habitat in the restored reaches are possible.
Johnston, C., Zydlewski, G., Kinnison, M., Smith, S., and Zydlewski, J. (2015) What is the spawning potential for shortnose sturgeon (Acipenser brevirostrum) in the Penobscot River after dam removal? An acoustic telemetry and habitat suitability study. 145th Annual Meeting of the American Fisheries Society. Portland Oregon. August 16-20 INVITED.	August 2015	Shortnose sturgeon have been documented foraging and wintering in the Penobscot River but there has been no indication of spawning since monitoring began in 2007. Water velocity, depth, and bottom substrate will be incorporated into a spawning habitat suitability model for newly available habitat.
Johnson, J., Zydlewski J., Hogle,J., Brunzell, J., Hudson, M. Coastal Cutthroat Trout Life History Strategies in Abernathy Creek and Chinook River, Washington, Two Tributaries of the Columbia River. Abstract and Presentation at the Oregon Chapter of the American Fisheries Society Annual Meeting, February 16-18,2005 Corvallis, Oregon.	February 2005
Johnson, J., Baumsteiger, J., Zydlewski, J., Hudson, M. and Ardren, W. (2008) Genetic Analysis of Sympatric Sea-run and Resident Coastal Cutthroat Trout in the Columbia River. Western Division iof the American Fisheries Society. Portland, Oregon June.	January 2008
Job, K., and Zydlewski, J. (2016) Using otolith microchemistry to infer life history and habitat use of American shad in the Penobscot River, Maine. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 23.	March 2016	Removals of Veazie and Great Works Dams were completed by 2013 in conjunction with upstream fish passage modifications projects as part of the Penobscot River Restoration Project.We used otolith micro-chemical analysis to infer life history patterns in these fish prior to range expansion.
Job, K., Zydlewski, J., and Schaffler, J. (2018) Using otolith microchemistry to infer habitat use of American shad prior to dam removal in the Penobscot River, Maine. 2018 Atlantic Salmon Ecosystems Forum. January 17. University of Maine, Orono, Maine.	January 2018	Prior to 2013, upstream passage of American Shad through the lowest dam (Veazie) was extremely poor, limiting spawning - and juvenile rearing - to 15 km of estuarine habitat. In order to understand how dam removals may influence juvenile estuarine use, we used microchemical analysis of otoliths.
Job, K., Schaffler, J., and Zydlewski, J. (2018) Using otolith microchemistry to infer habitat use of American shad, Atlantic tomcod, and American eel prior to and following dam removals in the Penobscot River, Maine. Maine Cooperative Fish and Wildlife Research Unit Cooperator’s Meeting, March 22. University of Maine, Orono.	March 2018	American shad in the Penobscot River have been contrained to the lower estuary for more than a century. We are using otolith microchemistry to inform life history patterns.
Job, K., Schaffler, J., and Zydlewski, J. (2018) Estuarine habitat use and spawning demographics of American Shad in the Penobscot River before dam removal. 148th Annual Meeting of the American Fisheries Society. Atlantic City, New Jersey. August 20.	August 2018	Since the early 20th century, passage by American shad past Veazie Dam (rkm 48) was biologically trivial. The general pattern of salinity use by juveniles has remained qualitatively unchanged post dam removal, likely reflective of low upstream recruitment.
Job, K., Schaffler, J., and Zydlewski, J. (2017) Using Otolith Microchemistry to Infer Habitat Use of American Shad and American Eel Prior to Dam Removal in the Penobscot River, Maine Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 22.	March 2017	We used otolith microchemistry to infer the degree to which juvenile shad utilize the freshwater and saline habitats prior to and following, the removal of Veazie and Great Works Dams. Preliminary data indicate complex patterns of habitat use in this spatially restricted population of American Shad.
Job, K., Schaffler, J., and Zydlewski, J. (2017) Using Otolith Microchemistry to Infer Habitat Use of American Shad Prior to Dam Removal in the Penobscot River, Maine. 147th Annual Meeting of the American Fisheries Society. Tampa, FL. August 20.	August 2017	We used otolith microchemistry to infer the degree to which juvenile shad utilize the freshwater and saline habitats prior to and following, the removal of Veazie and Great Works Dams. Preliminary data indicate complex patterns of habitat use in this spatially restricted population of American Shad.
Job, K., Schaffler, J., and Zydlewski, J. (2016) Using otolith microchemistry to infer life histories and American shad habitat use in the Penobscot River, Maine. Maine146th Annual Meeting of the American Fisheries Society. Kansas City, MO. August 23.	August 2016	Removals of Veazie and Great Works Dams were completed by 2013 in conjunction with upstream fish passage modifications projects as part of the Penobscot River Restoration Project. Otolith microchemical data will be used to infer patterns of salinity experience in this spatially restricted population prior to re connection with upriver habitat following dam removal.
Izzo, L., and Zydlewski, J. (2015) Growth of Atlantic Salmon in Downeast Maine: Using Historic Scales to Examine Trends Over 68 Years 145th Annual Meeting of the American Fisheries Society. Portland Oregon. August 16-20 INVITED.	August 2015	In 2000, the Gulf of Maine Distinct Population Segment (GOM DPS) of Atlantic Salmon was listed as endangered under the federal Endangered Species Act in eight rivers in Maine. Scales from over 6,000 individual fish will be examined to estimate age, smolting age, size at smolting, size at return, growth over time, and growth differences.
Izzo, L., and Zydewski, J. (2015). Post-restoration movements of upstream migrating adult Atlantic salmon in the lower Penobscot River. University of Maine Graduate Research Exposition, University of Maine, Orono. April 2.	April 2015	Movements of upstream migrating adult Atlantic salmon in the lower Penobscot River were described. Sites of delay and failure were considered.
Izzo, L., Maynard, G., and Zydlewski, J. (2015) Post-Dam Removal Movements of Upstream Migrating Adult Atlantic Salmon in the Lower Penobscot River, ME. 145th Annual Meeting of the American Fisheries Society. Portland Oregon. August 16-20 INVITED.	August 2015	As part of the Penobscot River Restoration Project , Great Works (rkm 60) and Veazie (rkm 48) Dams were removed from the Penobscot River, ME, making Milford Dam (rkm 62) the first impediment to fish upstream migration. Adult Atlantic salmon were captured at Milford, radio and PIT tagged, and displaced downstream in tidal reaches below the removed dams to track their upstream migration through the lower Penobscot River.
Izzo, L., Maynard, G., and Zydlewski, J. (2015) Movements of adult Atlantic salmon in the lower Penobscot River after dam removal and fish passage upgrades. NOAA National Hydropower Program Meeting. Gloucester, MA. July 9. INVITED.	July 2015	Movements of adult Atlantic salmon in the lower Penobscot River after dam removal and fish passage upgrades were assessed using radio telemetry.
Izzo, L., Maynard, G., and Zydlewski, J. (2015) Movements of adult Atlantic salmon in the lower Penobscot River after dam removal and fish passage upgrades. 1st Annual University of Maine Freshwater Science Symposium, University of Maine, Orono. January 29.	January 2015	Atlantic salmon adult passage was assessed with radio telemetry. Delays and passage efficiencies at dams were considered.
Izzo, L., Maynard, G., and Zydlewski, J. (2015) Adult Atlantic salmon telemetry study, 2014. Atlantic Salmon Recovery Working Group, NOAA Maine Field Station, Orono, ME. February 13. INVITED.	March 2015	Migratory behavior and passage of adult Atlantic salmon tagged in 2014 were presented. Implications were considered.
Izzo, L., Maynard, G. and Zydlewski, J. (2016) Behavior and Upstream Passage of Atlantic Salmon at the New Milford Fish Lift on the Penobscot River, ME. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 23.	March 2016	The status of endangered Atlantic salmon in the United States is dismal, with populations in many rivers being entirely or functionally extinct. Fish passage at the lowermost dam is discussed.
Izzo, L. and Zydlewski, J. (2016) Growth Trends in Two Sea Winter Atlantic Salmon in Maine's Downeast Rivers Over 50 Years. Maine146th Annual Meeting of the American Fisheries Society. Kansas City, MO. August 23.	August 2016	The status of endangered Atlantic salmon in the United States is dismal, with populations in many rivers being entirely or functionally extinct. We examined changes in smolt size and ocean growth, specifically during the second year at sea, from the 1950s to the mid-1990s in 2SW Atlantic salmon from Maine's Downeast region.
Izzo, L. and Zydlewski, J. (2014) Upstream passage of anadromous species in the lower Penobscot River, ME; assessing the Milford fish lift using Dual Frequency Identification Sonar (DIDSON). 144th Annual Meeting of the American Fisheries Society. Québec City, Canada. August 17-21.	August 2014	Recent Dam removals leave Milford Dam as the first impediment to fish upstream migration in the Penobscot River. Beginning in 2014, two DIDSON units will be placed inside the lift entrance to continuously monitor fish as they approach, enter, and are passed.
Izzo, L. and Zydlewski, J. (2014) Upstream passage of anadromous species in the lower Penobscot River; assessing the Milford fish lift using Dual Frequency Identification Sonar (DIDSON). 2014 Atlantic Salmon and Their Ecosystems Forum, University of Maine, Orono. January 8.	January 2014	After the removal of the two lowermost dams in the Penobscot River, Milford Dam represents the first anthropogenic impediment to upstream migration. The initiation of an approach to assess the efficacy of the newly modified fish way using a DIDSON is presented.
Irish, B., and Zydlewski,J. (2015) Marine-derived nutrient cycling in the St.Croix River, Maine. 145th Annual Meeting of the American Fisheries Society. Portland Oregon. August 16-20 INVITED.	August 2015	Three fish-ways at main-stem dams on the St. Croix River had been unilaterally closed to diadromous fish passage since the late 1980s by the State of Maine. In order to characterize current food web connections and nutrient limitation prior to alewife return, a food web assessment was initiated.
Irish, B., Zydlewski, J., and Cunjak, R. (2014) Marine-derived nutrient cycling in the St. Croix River, Maine. 2014 Atlantic Salmon and Their Ecosystems Forum, University of Maine, Orono. January 8.	January 2014	Fish passage on the St. Croix River has been closed for decades preventing the successful migration and spawning of alewife in inland waters. This work described the initiation of a study to assess the ecological changes that are anticipated after the recent opening of fish ways.
Irish, B., Zydlewski, J., and Cunjak R. (2013) Trophic and Marine Interactions in the St Croix River, Maine. Meeting of the International Joint Commission of the St. Croix Waterway, Calais Maine. INVITED June 24.	June 2013	Presentation of future work in the St.Croix River.
Irish, B., Zydlewski J., and Cunjak, R. (2014) Marine-derived nutrient cycling in the St. Croix River, Maine. Presented at: Sustaining the St. Croix Watershed: Research, Partnership and Action. St. Andrews, NB. November 20-21. INVITED.	November 2014	Discussed the role of anadromous fish in temperate ecosystems.
Irish, B., Zydlewski, J. and Cunjak, R. (2014) Marine-derived nutrient cycling in the St. Croix River, Maine. 144th Annual Meeting of the American Fisheries Society. Québec City, Canada. August 17-21.	August 2014	Fish ways at main stem dams on the St Croix River had been closed to diadromous fish passage since the late 1980s, but recently reopened. In order to characterize current food web connections and nutrient limitation prior to alewife return, a food web assessment was initiated in 2013.
Irish B, and Zydlewski, J. Marine-derived nutrient cycling in the St. Croix River, Maine. Annual Meeting of the Maine Cooperative Fish and Wildlife Research Unit. 2015. March 25; Orono, ME.	March 2015	Alewife migration in the St Croix River delivers nutrients to fish and invertebrate communities. Stable isotope analysis and nutrient diffusers were used to explore influence.
Irish B, Zydlewski, J., Cunjak, R. (2015) Marine-derived nutrient cycling in the St. Croix River, Maine. 1st Annual University of Maine Freshwater Science Symposium, University of Maine, Orono. January 29.	January 2015	The nutrient delivery of alewife in the St.Croix River was considered. Data using stable isotopes and nutrient diffusers were presented.
Hugo, D., Zydlewski, J., and Kocik, J. (2021) Using Sensor Fish Transmitters as Proxies for Documenting Downstream Fish Passage Conditions at Low-head Dams. 151st Annual Meeting of the American Fisheries Society. Baltimore, MD. November 6.	November 2021	Understanding downstream passage conditions and risks of injury at dams is necessary for effective management.This study provides insight into low-head dam passage conditions without manipulating live fish, illustrating that while some research objectives may still require live specimens, general passage research may be met with sensor fish.
Hughes, E., Zydlewski, J. and Gorsky, D (2010) Atlantic salmon (Salmo salar) spawning migrations in a controlled river under two transport strategies. 140th Annual Meeting of the American Fisheries Society. Pittsburgh, Pennsylvania. September 13-16.	September 2010
Hudson, M, Johnson J, Hogle,J, Brunzell, Zydlewski, J. Adult Coastal Cutthroat Trout Movement and Habitat Use in the Lower Columbia River Presented at the Coastal Cutthroat Trout Symposium: Biology, Status, Management, and Conservation 2005; Fort Worden State Park, Washington	October 2005
Hoving, C. L., W. B. Krohn, and D. J. Harrison. April, 2001. Habitat ecology of Canada lynx in eastern North America.Presented to the U.S. Fish and Wildlife Service's Regional Office, Hadley, MA. (Hoving and Krohn presented).	April 2001
Hoving, C. L., R. A. Joseph, and W. B. Krohn. Historic distribution of Canada lynx in the Northeast with special reference to Maine. The Interagency Lynx Biology Team Meeting, Orono, ME. (Krohn presented).	October 2002
Hoving, C. L., R. A. Joseph, and W. B. Krohn. April, 2001. Historical distribution and reproduction of Canada lynx in Maine. 57th Northeast Fish and Wildlife Conference, Saratoga Springs, NY. (Hoving presented).	September 2001
Hoving, C. L., D. J. Harrison, and W. B. Krohn. September, 2001. Multiple-scale habitat relations of Canada lynx in eastern North America. 2001 Annual Meeting of the Northeast Fur Resources Technical Committee. Providence, RI.	September 2001
Hoving, C. L., D. J. Harrison, W. B. Krohn, et al. September, 2001. Broad-scale habitat relationships of Canada lynx in eastern North America.Presented at the Eight Annual Conference of The Wildlife Society. Reno, NV. (Hoving presented).	September 2001
Hoving, C. L., D. J. Harrison, W. B. Krohn, et al. April, 2001. A probability model of Canada lynx occurrence in eastern North America. 57th Northeast Fish and Wildlife Conference, Satatoga Springs, NY.Poster presentation.	April 2001
Hoving, C. L., D. J. Harrison, W. B. Krohn, and W. J. Jakybas. Habitat ecology of Canada lynx in Maine and eastern North America. The Interagency Lynx Biology Team Meeting, Orono, ME. (Harrison presented).	October 2002
Hoving, C. L., D. J. Harrison, W. B. Krohn, and W. J. Jakubas. Canada lynx habitat, forest harvest strategies, and forest regeneration in northern Maine. Abstract and presentation at the Carnivore 2002 Meeting, Monterey, CA.	November 2002
Hoving, C. L., D. J. Harrison, W. B. Krohn, R. A. Joseph, and M. O'Brien. Climate change and Canada lynx: spatial occurrence models for eastern North America. Poster presented at the Carnivore 2002 Meeting, Monterey, CA.	November 2002
Homyack, J. A., D. J. Harrison, and W. B. Krohn. Preliminary results on the effects of precommercial thinning on snowshoe hare. Abtract and poster presented at the Northeast Fish and Wildlife Conference, Portland, ME.	April 2002
Homyack, J. A., D. J. Harrison, and W. B. Krohn. Effects of precommercial thinning on snowshoe hares in northern Maine: implication for Canada lynx. Abstract and presentation at the Carnivore 2002 Meeting, Monterey, CA.	November 2002
Homyack, J. A., D. J. Harrison, and W. B. Krohn. Effects of precommercial thinning on small mammals in northern Maine. Abstract and presentation at the Northeast Fish and Wildlife Conference, Portland, ME.	April 2002
Homyack, J. A., D. J. Harrison, and W. B. Krohn. Effects of precommercial thinning on showshoe hare in northern Maine. Abstract and presentation at the Annual Meeting of The Wildlife Society, Bismark, ND. (Homyack presented).	September 2002
Homyack, J. A., D. J. Harrison, W. B. Krohn, A. K. Fuller, and C. L. Hoving. Comparing conservation issues affecting Canada lynx within the northeastern and western U.S. and the Rocky Mountains. Presentation (and abstract) to the Wyoming Chapter of The Wildlife Society. Dubois, WY.	December 2005
Homyack, D. J. Harrison, and W. B. Krohn. Effects of precommercial thinning on snowshoe hares in northern Maine: implication for Canada lynx. The Interagency Lynx Biology Team Meeting, Orono, ME. (Homyack presented).	October 2002
Holbrook, C., Zydlewski, J., Kinnison, M. (2007) Riverine passage success for pre-spawn adult Atlantic salmon in the Penobscot River. 137th Annual Meeting of the American Fisheries Society. San Francisco, CA. September 2-6.	September 2007
Holbrook, C., Zydlewski, J., Kinnison, M. (2007) Assessments of migrating Atlantic salmon (Salmo salar) smolts in the Penobscot River using acoustic telemetry. 137th Annual Meeting of the American Fisheries Society. San Francisco, CA. September 2-6.	September 2007
Holbrook, C., J. Zydlewski, and M. Kinnison (2008) Effects of hydroelectric dams on survival and behavior of migrating Atlantic salmon smolts in the Penobscot River, Maine. Atlantic Salmon Research Forum. Orono, ME. January 8. PRESENTED.	January 2008
Hogg,R., Coghlan Jr.,S., and Zydlewski, J. (2012) Barrier removal in Sedgeunkedunk Stream: Sea lamprey recolonization and implications for Atlantic salmon habitat restoration. 2012 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. March 20.	March 2012
Hogg,R., Coghlan Jr.,S., and Zydlewski, J. (2011) Barrier Removal in Sedgeunkedunk Stream: Sea Lamprey Recolonization and Implications for Atlantic Salmon Habitat Restoration. Penobscot Valley Audubon Chapter, Inez Boyd Environmental Research Award at Bangor Public Library, Podium Presentation, May 12.	May 2011
Hogg,R., Coghlan Jr.,S., and Zydlewski, J. (2011) Barrier Removal in Sedgeunkedunk Stream: Sea Lamprey Recolonization and Implications for Atlantic Salmon Habitat Restoration. 2011 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. April 12.	April 2011
Hogg, R., Coghlan, S., Zydlewski, J., Simon, K., Gardner, C., Ratten, S. (2010) Barrier removal in Sedgeunkedunk Stream: Sea lamprey recolonization and implications for Atlantic salmon habitat restoration. 140th Annual Meeting of the American Fisheries Society. Pittsburgh, Pennsylvania. September 13-16.	September 2010
Hogg, R., Coghlan Jr., S., Zydlewski, J., and Simon, K. (2015) Fish Community Response to a Small-Stream Dam Removal in a Maine Coastal River Tributary. Guest Lecture: Principles of Fish and Wildlife Conservation (FW 251), Eastern Oregon University, La Grande, OR. February 23. INVITED.	February 2015	The response of a fish community to dam removal is presented. Patterns and time courses are discussed.
Hogg, R., Coghlan Jr., S., Zydlewski, J., and Simon, K. (2014) Anadromous Sea Lampreys Recolonize a Maine Coastal River Tributary After Dam Removal: Ecosystem Engineers? Oregon Chapter American Fisheries Society Annual Meeting, Eugene, OR. February 27.	February 2014	Recolonization of a river by sea lamprey after dam removal is presented. Implications for anadromous fishes are discussed.
Hogg, R., Coghlan Jr., S., Zydlewski, J., and Gardner, C. (2012) Barrier removal in Sedgeunkedunk Stream: Sea lamprey recolonization and implications for Atlantic salmon habitat restoration. 2012 Forum, Atlantic Salmon and their Ecosystems, Bangor Maine January 10-11.	January 2012
Hogg, R., Coghlan Jr., S., Zydlewski, J. and Simon, K. (2015) Anadromous Sea Lampreys Recolonize a Maine Coastal River Tributary After Dam Removal: Ecosystem Engineers? 145th Annual Meeting of the American Fisheries Society. Portland Oregon. August 16-20.	August 2015	Migrating lampreys were marked with PIT‐tags and their activity was tracked with daily surveys in a restored stream. Data suggest that spawning‐phase Sea Lampreys are ecosystem engineers.
Historical Ecology of the White-tailed Deer in Maine. The Munsungan Workshop on Deer Wintering Areas in Maine, Maine Cooperative Forestry Research Unit, Stillwater, ME.	December 2007
Hickox, E., Frechette, D., and Zydlewski, J. (2023) Upstream and downstream dam passage of adult Alewife on the St. Croix River. 153rd Annual Meeting of American Fisheries Society, Grand Rapids, Michigan. August 20.	August 2023	We investigated Alewife behavior and dam passage using radio telemetry to inform future passage design decisions. To track upstream migration, adults were electrofished downstream of Woodland Pulp and Grand Falls dams, and gastrically tagged, released, and tracked during their ascent in 2022 and 2023 (n=230 and n=250 respectively).
Hickox, E., Frechette, D., and Zydlewski, J. (2024) Approach and passage of adult alewife at two dams on the St. Croix River. 154th Annual Meeting of American Fisheries Society, Honolulu, Hawai’i. September 15.	September 2024	We investigated Alewife behavior and dam passage using radio telemetry to inform future passage design decisions. To track upstream migration, adults were electrofished downstream of Woodland Pulp and Grand Falls dams, gastrically tagged, released, and tracked during their ascent in 2022 and 2023
Hickox, E., Frechette, D., and Zydlewski, J. (2022) Alewife approach and passage at Woodland and Grand Falls dams on the St.Croix River. The Atlantic International Chapter of the American Fisheries Society. Newry, Maine. September 18.	September 2022	Alewife approach and passage at Woodland and Grand Falls dams on the St.Croix River.
Hickox, E., J. Zydlewski, D. Frechette. 2022. Alewife approach and passage at Woodland & Grand Falls Dams. International St. Croix River Watershed Board and Partners Meeting. St. Andrews, New Brunswick. October 27.	October 2023	Alewife approach and passage at Woodland & Grand Falls Dams
Heres, B., Zydlewski, J., and Blomberg, E. (2018) Survival and delay of American eel (Anguilla rostrata) through two hydroelectric dams on the Penobscot River, Maine. 2018 Atlantic Salmon Ecosystems Forum. January 17. University of Maine, Orono, Maine.	January 2018	Hydroelectric dams can cause high mortality or injury for adult downstream migrating American eels (Anguilla rostrata). In the Penobscot River, Maine, USA, survival and delays at two main-stem dams were assessed using acoustic telemetry.
Heres, B., Blomberg, E., and Zydlewski, J. (2017) Survival of Downstream Migrating Adult American Eel through the Penobscot River, Maine. 147th Annual Meeting of the American Fisheries Society. Tampa, FL. August 20.	August 2017	Hydroelectric dams can be a site of high mortality or injury for adult downstream migrating American eels . We used acoustic telemetry to estimate downstream survival through West Enfield (rkm 99) and Milford (rkm 62) dams.
Heres, B., Blomberg, E., and Zydlewski, J. (2017) Forecasting Downstream Migration of American Eel Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 22.	March 2017	Hydroelectric dams can be a site of high mortality or injury for adult downstream migrating American eels . We used acoustic telemetry to estimate downstream survival through West Enfield (rkm 99) and Milford (rkm 62) dams
Hawkes, J., Kocik, J., Zydlewski, J., Stich, D., Sheehan,T., Goulette, G., and Renkawitz, M. (2018) Atlantic salmon: Assessments through the estuary and beyond. Salmon Ocean Ecology Meeting. February 27., Newport, Oregon.	February 2018	Low marine survival is a major hurdle to the recovery and persistence of the Gulf of Maine Atlantic salmon Distinct Population Segment (GOM DPS). Efforts the last two decades (e.g., analysis of historic tagging data, in-river trapping, diet analysis, telemetry) have characterized a suite of risks incurred during seaward and early marine migration.
Harrison, D. J., and W. B. Krohn. Relationships among partial harvesting, snowshoe hare, Canada lynx, and forest harvesting: a survey of research activities at the University of Maine and Maine Cooperative Fish and Wildlife Research Unit. National Lynx Biology Team Meeting. Minneapolis, MN.	August 2005
Harrison, D. J., and W. B. Krohn. Predicting responses of snowshoe hares and Canada lynx to alternative forest harvesting scenarios: a progress report. National Council for Air and Stream Improvement. Kingfield, ME.	August 2005
Harrison, D. J., W. B. Krohn, S. Scott, A. K. Fuller, L. Robinson, and C. L. Hoving. Stand-scale management to increase hare and lynx use of managed forests.? Invited presentation at a workshop on Bridging Science and Stewardship sponsored by the Maine Cooperative Forestry Research Unit, Brewer, ME.	May 2008
Harrison, D. J., W. B. Krohn, L. Robinson, A. K. Fuller, and C. L. Hoving. Multi-scalar habitat preference of snowshoe hares: how does a prey species coexist with a specialist predator. Presented to the International Union of Game Biologists, Uppsala, SWEDEN. (Harrison presented).	August 2007
Harrison, D. J., W. B. Krohn, L. L. Robinson, S. Scott, A. K. Fuller, and C. L. Hoving. Temporal and spatial variation in snowshoe hare densities in eastern North America: relationships to lynx and forest management. Canada Lynx on the Border: Biological and Political Realities for Conservation Planning. International Workshop Organized by the University of Minnesota, Grand Portage, MN. (Harrison presented).	October 2007
Harrison, D. J., W. B. Krohn, A. K. Fuller, J. A. Homyack, and L. Robinson. An overview of snowshoe habitat ecology in the Acadian forests of eastern North America. Meeting of the Interagency (Federal) Lynx Biology Group, Duluth, MN.	October 2006
Harrison, D. J., J. A. Homyack, J. A. Litvaitis, and W. B. Krohn. Quantifying densities of snowshoe hares in Maine using pellet plots. Wildlife Management Institute's Eastern Lynx Workshop, North Conway, NH.	January 2004
Harrison, D. J., J. A. Homyack, A. K. Fuller, and W. B. Krohn. Effects of precommercial thinning and partial harvesting on snowshoe hares in Maine. Wildlife Management Institute's Eastern Lynx Workshop, North Conway, NH.	January 2004
Harrison, D. J., C. L. Hoving, and W. B. Krohn. Distribution and extent of Canada lynx habitat in eastern North America from GIS modeling. Wildlife Management Institute's Eastern Lynx Workshop, North Conway, NH.	January 2004
Harrison, D. J., A. K. Fuller, J. A. Homyack, and W. B. Krohn. How do clearcutting, precommercial thinning, and partial harvest influence wildlife habitats? Worjkshop on Managing Fiber Prodcution, Wildlife Habitat, and Biodiversity: Latest Results from the Maine Cooperative Forestry Research Unit. Plum Creek Timber Company, Fairfield, ME.	December 2003
Harrison, D. J. and W.B. Krohn. 2010. Ongoing research efforts to link landscape conservation with wildlife habitat planning on commercial forestlands in northern Maine. Invited Presentation to Directors of Resource Conservation, Wildlife, and Planning at the Maine Department of Inland Fisheries and Wildlife, Augusta.	June 2010
Guyette,M., Loftin, C., Zydlewski, J. (2011) Effects of marine-derived nutrients on juvenile Atlantic salmon growth and body condition. 141th Annual Meeting of the American Fisheries Society. Seattle, Washington. September 4-9. INVITED.	September 2011
Guyette, M.Q., C.S. Loftin, and J. Zydlewski. 2011. Evidence of marine-derived nutrient uptake in Atlantic salmon nursery stream communities, 2011 Maine Water Conference, 16 March, Augusta, ME.	March 2011
Guyette, M., Loftin, C.,and Zydlewski, J. (2011) Evidence of marine-derived nutrient uptake in Atlantic salmon nursery stream communities. Presentation for the Project SHARE Quarterly Meeting. Whitneyville, ME. June 9. INVITED.	June 2011
Guyette, M., Loftin, C., and Zydlewski, J. (2011) Marine-derived nutrient uptake in Atlantic salmon nursery stream communities. Presentation for the North American Benthological Society Annual Meeting. Providence, RI. May 26.	May 2011
Guyette, M., Loftin, C., and Zydlewski, J. (2011) Evidence of marine-derived nutrient uptake in Atlantic salmon nursery stream communities. Presentation for the University of Maine GradExpo. Orono, ME. April 21.	April 2011
Guyette, M., Loftin, C., Zydlewski, J. 2012. Marine-derived nutrient uptake in macroinvertebrate communities in Atlantic salmon nursery streams. Presentation for the Society for Freshwater Science Annual Meeting. Louisville, KY. May 24.	May 2012
Guyette, M., Loftin, C., Zydlewski, J. 2012. Evidence of marine-derived nutrient uptake in Atlantic salmon nursery stream communities. Presentation for the 2012 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. March 20.	March 2012
Guyette, M., Loftin, C., Zydlewski, J. (2011) The role of marine derived nutrients delivered by anadromous fish in Penobscot River watershed nursery streams. Presentation for the Maine Bureau of Sea Run Fisheries and Habitat, Department of Marine Resources. Bangor, ME. February 10. INVITED.	February 2011
Guyette, M., Loftin, C., Zydlewski, J. (2011) Evidence of marine-derived nutrient uptake in Atlantic salmon nursery stream communities. Maine Water Conference. Augusta, ME. March 16.	March 2011
Guyette, M., Loftin, C., Zydlewski, J. (2011) Evidence of marine-derived nutrient uptake in Atlantic salmon nursery stream communities. 2011 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. April 12.	April 2011
Guyette, M., Loftin, C., Zydlewski, J. (2011) The role of marine derived nutrients delivered by anadromous fish in Penobscot River watershed nursery streams. University of New Brunswick. Fredericton, NB. December 9. INVITED.	December 2011
Guyette, M., Loftin, C., Zydlewski, J. (2010) Effects of marine-derived nutrients on water chemistry and macroinvertebrates in Atlantic salmon nursery streams in the Penobscot River watershed, Maine. ASLO-NABS. Santa Fe, New Mexico. June 8.	June 2010
Guyette, M., Loftin, C., Zydlewski, J., Saros, J. (2009) Historical records of anadromous fish runs from sediment cores in Penobscot River watershed lakes, Maine. 139th Annual Meeting of the American Fisheries Society. Nashville Tennessee. August 30-September 3.	September 2009
Guyette, M., Loftin, C. and Zydlewski, J. (2012) Evidence of marine-derived nutrient uptake in Atlantic Salmon nursery stream communities 2012 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. March 20.	March 2012
Guyette, M., Loftin C., and Zydlewski, J. (2012) Effects of marine-derived nutrients on juvenile Atlantic salmon (Salmo salar) growth and body condition. 2012 Forum, Atlantic Salmon and their Ecosystems, Bangor Maine January 10-11.	January 2012
Guyette, M., C.S. Loftin, and J.Zydlewski. 2011. Evidence of marine-derived nutrient uptake in Atlantic salmon nursery stream communities. Presentation for the 2011 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. 12 April. Invited.	April 2011
Guyette, M., C.S. Loftin, and J. Zydlewski. 2011. The role of marine derived nutrients delivered by anadromous fish in Penobscot River watershed nursery streams. Presentation for the Maine Bureau of Sea Run Fisheries and Habitat, Department of Marine Resources. Bangor, ME. 10 February. Invited.	February 2011
Guyette, M., C.S. Loftin, and J. Zydlewski. 2011. Marine-derived nutrient uptake in Atlantic salmon nursery stream communities. Presentation at the Annual Meeting of the North American Benthological Society, 22-26 May, Providence, RI.	May 2011
Guyette, M., C.S. Loftin, and J. Zydlewski. 2011. Evidence of marine-derived nutrient uptake in Atlantic salmon nursery stream communities. Presentation for the Project SHARE Quarterly Meeting. Whitneyville, ME. 9 June. Invited.	June 2011
Guyette, M., C.S. Loftin, J.Zydlewski. 2010. The role of marine derived nutrients delivered by anadromous fish in Penobscot River watershed nursery streams. Presentation for the Cunjak Lab, University of New Brunswick. Fredericton, NB. 9 December. Invited.	December 2010
Guyette, M., C.S. Loftin, J. Zydleswki. 2011. Effects of marine-derived nutrients on juvenile Atlantic salmon and their communities. Presented at the 21-22 April UMaine Grad Expo, Wells Commons.	April 2011
Guyette, M., C. Loftin , J. Zydlewski, and J. Saros. Historical records of anadromous fish runs from sediment cores in Penobscot River watershed lakes, Maine. Annual meeting of the American Fisheries Society, Nashville, TN, 31 August-4 September,	August 2009
Guyette, M., Loftin, C., Zydlewski, J. 2012 Marine-derived nutrient uptake in macroinvertebrate communities in Atlantic salmon nursery streams. Society for Freshwater Science Annual Meeting. Lousisville, KY, May 20-24.	May 2012
Guyette, M. Loftin, C., Zydlewski, J. 2012. Effects of marine-derived nutrients on juvenile Atlantic salmon (Salmo salar) growth and body condition. Presentation for the Biennial Research Forum: Atlantic Salmon and Their Ecosystems, Bangor, ME. January 10.	January 2012
Guyette, M. 2012. Effects of marine-derived nutrients on juvenile Atlantic salmon (Salmo salar) growth and body condition. Presentation for the College of Natural Sciences, Forestry, & Agriculture Graduate Student Research Awards Competition, University of Maine. Orono, ME. February 22, 2012.	February 2012
Guy, H., Vogel, S.K., Loftin, C., Zydlewski, J.D. Do state natural resource agencies prioritize DEI messaging? [poster] Maine Cooperative Fish and Wildlife Research Unit Annual Meeting. July 12, 2022. Orono, ME.	July 2023	The U.S. Geological Survey’s (USGS) Cooperative Fish and Wildlife Research Units (CRU) program establishes relationships among the USGS, U.S. Fish and Wildlife Service, Wildlife Management Institute, host universities, and state resource agencies. This research focuses on analyzing Unit scientist impacts and outputs by assessing the collaborative networks of the Units and the production of scientific publications as one measure of impact.
Grote, A.B., Zydlewski, J., Bailey, M.M. (2011) Establishing Baselines for American shad in the Penobscot River. 141th Annual Meeting of the American Fisheries Society. Seattle, Washington. September 4-9.	September 2011
Grote, A., Zydlewski, M. Bailey, and J. Hightower. 2012. DIDSON assessment of American shad approaching a hydroelectric dam. 142nd Annual Meeting of the American Fisheries Society, St. Paul, Minnesota, August 19-23, 2012.	August 2012
Grote, A., Zydlewski, J., and Bailey, M. (2013) Demography and movements of spawning American shad (Alosa sapidissima) in the Penobscot River, Maine, prior to dam removal. Maine Cooperative Fish and Wildlife Research Unit Annual Meeting, University of Maine, Orono, Maine. INVITED. March 21.	March 2013	Assessment of American shad in the Penobscot River prior to restoration activities.
Grote, A., Zydlewski, J., and Bailey, M. (2012)Exploring the movements of migratory fish in the Penobscot River using DIDSON Technology. 2012 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. March 20.	March 2012
Grote, A., Zydlewski, J., and Bailey, M. (2012) River American shad: establishing baselines prior to restoration. 2012 Forum, Atlantic Salmon and their Ecosystems, Bangor Maine January 10-11.	January 2012
Grote, A., Zydlewski, J., Bailey, M., Lipsky, C. (2010) Who's knocking on the door? Using DIDSON to assess the presence of American shad in the Penobscot River. 140th Annual Meeting of the American Fisheries Society. Pittsburgh, Pennsylvania. September 13-16.	September 2010
Grote, A., Bailey, M. and Zydlewski, J. (2011) Fishway Monitoring Using DIDSON: Hydroacoustic Assessment of American Shad at Veazie Dam. 2011 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. April 12.	April 2011
Grote, A., Bailey, M. and Zydlewski, J. (2011) Establishing Baselines for American Shad in the Penobscot River. Department of Marine Resources, Bangor, Maine. April 14. INVITED.	April 2011
Grote, A., Bailey, M. and Zydlewski, J. (2011) Establishing Baselines for American Shad in the Penobscot River Presentation. The Nature Conservancy, Brunswick Maine. March 22. INVITED.	March 2011
Goulette, G., Hawkes, J., and Zydlewski J. (2014) When is a smolt not a smolt? Identifying predation in the Penobscot River estuary using acoustic telemetry. Penobscot Watershed Conference, Northport, Maine April 8.	April 2016	We used acoustic telemetry to assess migratory patterns of Atlantic salmon smolts. We used pattern changes to infer predation events.
Goulette, G., Hawkes, J., and Zydlewski J. (2014) When is a smolt not a smolt? Identifying predation in the Penobscot River estuary using acoustic telemetry. 2014 Atlantic Salmon and Their Ecosystems Forum, University of Maine, Orono. January 8.	January 2014	Passive acoustic telemetry work on Atlantic salmon smolts in the Penobscot River reveals patterns consistent with predation. Circumstantial evidence was used to estimate the loss of smolts due to inferred predation events.
Gorsky, D., Zydlewski,J., Basley, D.(2008) Characterizing basic movements and habitat use of lake whitefish (Coregonus clupeaformis) in Clear Lake, Maine. 138th Annual Meeting of the American Fisheries Society. Ottawa, Canada. August 17-21.	August 2008
Gorsky, D., Zydlewski,J., Basley, D.(2007) Characterizing movement and habitat use of lake whitefish (Coregonus clupeaformis) in Clear Lake,Maine. 137th Annual Meeting of the American Fisheries Society. San Francisco, CA. September 2-6	September 2007
Gorsky, D., Zydlewski, J. and Kling, L. (2008) Intraspecific competition in lake whitefish; the interactive effect of food availability and fish density on growth rates in a laboratory setting. 138th Annual Meeting of the American Fisheries Society. Ottawa, Canada. August 17-21.	August 2008
Gorsky, D. and Zydlewski, J (2009) Who is responsible for larval recruitment failure of lake whitefish in Maine? The role of intraguild predation by introduced rainbow smelt. 139th Annual Meeting of the American Fisheries Society. Nashville Tennessee. August 30-September 3.	September 2009
Gerth, W., Murphy, C.A., and Arismendi, I. 2022. Caddisflies make mistakes in a dammed river system. Poster presentation to the Oregon Chapter of the American Fisheries Society.	March 2022	We found that caddisfly females were diving, apparently to oviposit, in reservoirs. Our findings represent the deepest recorded dives for these taxa and demonstrate how reservoirs can result in behaviors that are not likely to result in viable reproduction.
Gardner, C., J., Coghlan, S., and Zydlewski, J. (2008) Monitoring changes in resident and anadromous fish communities in Sedgeunkedunk Stream (Penobscot Co., ME) after low head dam removal138th Annual Meeting of the American Fisheries Society. Ottawa, Canada. August 17-21.	August 2008
Gardner, C. and Zydlewski, J. (2016) Assessing the influence of imprinting and stocking timing on Atlantic salmon smolt to adult return. Maine146th Annual Meeting of the American Fisheries Society. Kansas City, MO. August 23.	August 2016	During migration, Atlantic salmon smolts can incur significant direct or indirect mortality from dams and predation. We investigated two methods of stocking to increase survival, imprinting and trucking, and night release.
Gardner, C. and Zydlewski, J. (2014) Assessing the influence of stocking location and salinity acclimation in the Penobscot River on smolt to adult returns. 2014 Atlantic Salmon and Their Ecosystems Forum, University of Maine, Orono. January 8.	January 2014	The results from a three year study to assess the effect of a novel stocking method will be presented. Plans for a follow up evaluation effort will be described.
Gardner, C. Coghlan, Jr., S., and Zydlewski, J. (2009) Monitoring changes in resident fish communities and anadromous sea lamprey in Sedgeunkedunk Stream (Penobscot Co., Maine) after low-head dam removal. The Diadromous Species Restoration Research Network Science Meeting - Restoration of Diadromous Fishes and Their Ecosystems: Confluence of Science and Restoration. University of Maine, Orono, Maine. July 22-24.	July 2009
Gardner, C. Coghlan, Jr., S., and Zydlewski, J. (2009) Monitoring changes in resident fish communities and anadromous sea lamprey in Sedgeunkedunk Stream (Penobscot Co., Maine) after low-head dam removal. Atlantic International Chapter of the American Fisheries Society, Shelburne New Hampshire, September 20-22.	September 2009
Gardner, C. Coghlan, Jr., S., and Zydlewski, J. (2009) Monitoring changes in resident fish communities and anadromous sea lamprey in Sedgeunkedunk Stream (Penobscot Co., Maine) after low-head dam removal. 139th Annual Meeting of the American Fisheries Society. Nashville Tennessee. August 30-September 3.	September 2009
Gahagan, B., Bailey, M., Jordaan, A., Nelson, G., Stich, D., and Zydlewski,J. (2022) Build to scale: restoration of alosines hinges on recognizing the obvious. 152^st Annual Meeting of the American Fisheries Society. Spokane, WA.	August 2022	Anadromous alosines (American Shad [<i>Alosa sapidissima</i>], Alewife [<i>A. pseudoharengus</i>] and Blueback Herring [<i>A. aestivalis]</i>) have been a focus of conservation and restoration efforts for decades, yet few clear success stories exist.Fisheries and restoration professionals have an important role in communicating those choices by providing innovative solutions, building coalitions, and providing honest communication as to the costs and benefits of action versus the <i>status quo<
Fuller, A. K., D. J. Harrison, and W. B. Krohn. ?Landscape planning initiative for northern Maine using area sensitive umbrella species.? Presentation to the USDA Natural Resources Conservation Service and U.S. Fish and Wildlife Service on workshop on their cooperative Healthy Forest Research Program, Bangor, ME. (Fuller was the presenter).	July 2008
Flye, M.E., Sponarski, C.C., McGreavy, B., Strong, A.L. and Zydlewski, J. (2018) Getting Over the Dam: Overcoming institutional barriers to the recovery of Atlantic salmon by navigating the social-science/policy interface. 2018 Atlantic Salmon Ecosystems Forum. January 17. University of Maine, Orono, Maine.	January 2018	The Atlantic salmon population in Maine remains critically low despite extensive hatchery supplementation and habitat improvement efforts over the past four decades. We hope to characterize institutional barriers and factors that currently impact Atlantic salmon recovery decision making in Maine.
Flye, M., Sponarsky, C., Zydlewski, J., McGreavy, B., and Strong, A. (2018) Getting over the dam: Overcoming the barriers to Atlantic salmon recovery by navigating the social science/policy interface. Maine Cooperative Fish and Wildlife Research Unit Cooperator’s Meeting, March 22. University of Maine, Orono.	March 2018	Atlantic salmon recovery is hampered by challenging regulatory constraints. We are using social science approaches to identify network and patterns of management action.
Flye, M., Sponarski, C., and Zydlewski, J. (2024) Beyond Recovery: Assessing human-marine mammal interactions and agency response across the United States. International Association for Society and Natural Resources (IASNR), Cairns, Australia, June 23.	June 2024	In collaboration with the National Oceanic and Atmospheric Administration (NOAA), we conducted a mixed-methods research project aimed at characterizing human-marine mammal interactions (HMMI) under NOAA jurisdiction and the current state of agency investment. Interactions with aquatic species have been historically underrepresented in the human wildlife interactions literature, making this research a valuable addition to the broader field.
Flye, M., Sponarski, C., and Zydlewski, J. (2020) Homeward Bound: Returning Atlantic Salmon to Maine rivers using aquaculture. 150th Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 30.	August 2020	The Maine Department of Marine Resources (partner in the collaborative leadership framework- CLF- for salmon management in Maine, along with NOAA, USFWS, and Penobscot Nation) is collaborating with Cooke Aquaculture to apply a novel rearing program aimed specifically at increasing natural spawning. We will work to identify knowledge gaps to aid in public outreach and provide insights into the impacts and opportunities afforded by this rearing approach.
Flye, M., Sponarski, C., and Zydlewski, J. (2023) Did changing the collaborative governance structure of Atlantic salmon in Maine work? The International Association for Society and Natural Resources (IASNR), Portland, Maine. June 11.	June 2023	The DPS has been jointly managed by Federal, State, and Tribal entities under several different governance structures. After the first three years of a new governance structure, we have partnered with managers to conduct an evaluation of the CMS (Collaborative Management Strategy).
Flye, M., Sponarski, C., Zydlewski, J., and McGreavy, B. (2020) Does leadership have a role in collaborative environmental governance? 2019 Atlantic Salmon Ecosystems Forum. January 14. University of Maine, Orono, Maine.	January 2020	While studies have assessed the conditions and structures under which collaborative action occurs, little emphasis has been placed on the role that leadership may play in joint-jurisdictional systems. We used the Atlantic Salmon Recovery Framework as a case study to examine the influence that different types of leadership may have on perceived program efficacy, member buy-in, and lived experience through semi-structured interviews.
Flye, M., Sponarski, C., Zydlewski, J., and McGreavy, B. (2019) Communication and Collaboration within the Atlantic Salmon Governance Structure of Maine. 2019 Maine Sustainability and Water Conference, Augusta, Maine. March 28.	March 2019	The Atlantic Salmon Recovery Framework is responsible for Atlantic salmon management and recovery in Maine. We conducted a communication network analysis to better understand the flow of information and communication between members.
Flye, M., Sponarski, C., Zydlewski, J., and McGreavy, B. (2019) Communication and Collaboration within the Atlantic Salmon Governance Structure of Maine. 2019 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. March 26. (Poster)	March 2019	We present data on a network analysis of the governance structure for Atlantic salmon management. These data are being used to inform restructuring.
Flye, M., Sponarski, C., Zydlewski, J., and McGreavy, B. (2019) Communication and Collaboration within the Atlantic Salmon Governance Structure of Maine 149th Annual Meeting of the American Fisheries Society. Reno Nevada. September 29.	September 2019	In 2000 the Gulf of Maine Distinct Population Segment was listed as Endangered under ESA with joint listing authority shared by the NOAA and the USFWS. We used survey results to examine the communication between members of the Atlantic Salmon Recovery Framework through communication network analysis.
Flye, M., Sponarski, C., Zlatich, A., and Zydlewski, J. (2024) Did changing the governance structure of Atlantic salmon in Maine improve collaborative efficacy? The Atlantic Salmon Ecosystems Forum, University of Maine, Orono, Maine. January 9.	January 2023	In 2017, we conducted a communication network analysis of the Atlantic Salmon Recovery Framework (ASRF). The results contributed to the formation of a new collaborative governance structure in 2019, the Collaborative Management Strategy (CMS).
Flye, M., Sponarski, C., Frechette, D., and Zydlewski, J. (2022) Local perceptions of Atlantic salmon conservation and management in Downeast Maine. 152^stAnnual Meeting of the American Fisheries Society. Spokane, WA.	August 2022	The Collaborative Management Strategy (CMS), the governance structure for Atlantic salmon management in Maine, is collaborating with Cooke Aquaculture to implement a novel rearing program to increase natural spawning. Native smolts will be transferred to coastal net pens and reared to maturation.
Flye, M., Sponarski, C., Frechette, D., and Zydlewski, J. (2021) Returning Atlantic Salmon to Maine rivers using aquaculture. 151st Annual Meeting of the American Fisheries Society. Baltimore, MD. November 6.	November 2021	The Maine Department of Marine Resources (partner in the Collaborative Management Strategy [CMS] for Atlantic salmon management in Maine, along with NOAA, USFWS, and Penobscot Nation) is collaborating with Cooke Aquaculture to apply a novel rearing program aimed at increasing natural spawning.Working with stakeholders, we have developed a sociological questionnaire which has been administered to coastal communities near the proposed net pen site to assess public opinions.
Flye, M., Sponarski, C., Frechette, D. and Zydlewski, J. (2023) Local perceptions of Atlantic salmon conservation and management in Downeast Maine. The International Association for Society and Natural Resources (IASNR), Portland, Maine. June 11.	June 2023	Atlantic salmon managers have partnered with Cooke Aquaculture to apply a novel conservation aquaculture program. Through this exploratory study, we examined differences and similarities in attitudes, beliefs, and knowledge about Atlantic salmon, hatcheries, and aquaculture between property owners in the town where the proposed net pen site would be located, and those in neighboring towns
Flye, M., Sponarski, C., Zydlewski, J. and Frechette, D. (2022) Public perceptions of Atlantic salmon conservation. 2022 Atlantic Salmon Ecosystems Forum. January 11. University of Maine, Orono, Maine.	January 2022	The Maine Department of Marine Resources (partner in the Collaborative Management Strategy [CMS] for salmon management in Maine, along with NOAA, USFWS, and Penobscot Nation) is collaborating with Cooke Aquaculture to apply a novel rearing program aimed at increasing natural spawning.Working with stakeholders, we have developed a sociological questionnaire which has been administered to 900 residents across coastal communities near the proposed net pen site.
Figueroa-Muñoz, G., Murphy, C., and Zydlewski, J. (2024) Contrasting anadromous and landlocked Alewife interactions with lake food webs. The Atlantic Salmon Ecosystems Forum, University of Maine, Orono, Maine. January 9.	January 2023	Recent efforts to recover native anadromous Alewife may return these fish to systems that have been without them for hundreds of years. There are concerns that reintroduction may influence contemporary food webs with high-value non-native cold-water fisheries.
Figueroa, G., Murphy, C.A., Zydlewski, J. 2024. Understanding PFAS variability in fishes. Society for Freshwater Science Annual Meeting. Philadelphia, PA.	June 2024	PFAS compounds are of increasing human health and environmental concern. Even with guidance, variability exists in current fish collection methods, sample sizes, species, and waterbodies sampled within and outside of Maine.
Fernandes, S., Zydlewski, G.B., Zydlewski,J., Wipplehauser, G., Kinnison, M . (2010) Seasonal Distribution and Movements of Shortnose Sturgeon in the Penobscot River Estuary, Maine. Oral presentation at the Annual meeting of the North American Chapter of the World Sturgeon Conservation Society, Bozeman, MT. September 6-8.	September 2010
Fernandes, S., G. Zydlewski, M. Kinnison and J. Zydlewski (2008) Annual movement and migration patterns of Atlantic and shortnose sturgeons in the Penobscot River, ME. Atlantic Salmon Research Forum. Orono, ME. January 8.	January 2008
Fedarick, J., Murphy, C.A., Record, S., Roy, A., Perkins, D. One Shell of a Home: Habitat Suitability for Yellow Lampmussel. Presentation to Northeast Association of Fish & Wildlife Agencies. April 21-24 2024, Cape Cod, MA.	April 2024	Yellow Lampmussel, or <i>Lampsilis cariosa,</i> is listed as a federal At-Risk species; however, its status varies from apparently secure to extirpated across occupied states and provinces. This study assessed the relationship between <i>L. cariosa</i> presence and potential interacting abiotic and biotic drivers, including climatic variables, hydrologic variables, host fish presence, and other co-occurring mussels to investigate rangewide habitat suitability
Fedarick, J., Murphy, C.A., Record, S., Roy, A., Perkins, D. 2024. Using museum collections to improve range wide modeling and conservation planning for at-risk mussel species. Presentation to the Society for Freshwater Science Annual Meeting, Philadelphia, PA.	June 2024	Freshwater mussel distribution data are siloed within individual agencies and limited to where resources have allowed for surveys. Because our modern data is not comprehensive, we cannot conclude that species exist only where they have been recently found. Our study provides a reproducible method for the reverification and stewardship of freshwater mussel museum records and highlights how museum records can provide unique contributions to our understanding of the range of rare, at-risk species.
Farrington, S.J., C. Murphy, D. Perkins, and A.H. Roy. 2023. Range-wide ecology, conservation, and research needs for Yellow Lampmussel. Northeast Aquatic Biologists Meeting, 15-17 February 2023, Plymouth, MA.	February 2023	The Yellow Lampmussel (YLM), <i>Lampsilis cariosa</i>, is a freshwater mussel that is locally designated as endangered, threatened, or a special status in eight U.S. states and two Canadian provinces. This presentation will summarize the state of the science for Yellow Lampmussel throughout its range with particular attention to the threats, research gaps, and regional differences identified in initial Yellow Lampmussel Working Group meetings.
Erbland, P., Zydlewski, G., Zydlewski, J., and Hightower, J. (2012) Estimating Penobscot River Fish Passage using Fixed Location SONAR. 2012 Forum, Atlantic Salmon and their Ecosystems, Bangor Maine January 10-11.	January 2012
Erbland, P. J., Zydlewski, G.B., Zydlewski, J., Hightower, J.E. (2011) Fixed, Side-Aspect Acoustic Sampling of a Diverse Diadromous Fish Community in a Tidal River. 141th Annual Meeting of the American Fisheries Society. Seattle, Washington. September 4-9.	September 2011
Erbland, P. J., G. B. Zydlewski, J. Zydlewski, and J. E. Hightower. 2011. Fixed, side-aspect acoustic sampling of a diverse diadromous fish community in a tidal river. 141th Annual Meeting, American Fisheries Society, Seattle, WA, September 4-8, 2011.	September 2011
Eberhardt, E., Gerth, W.J., Murphy, C.A., Konstantinidis, P., Arismendi, I. 2022. Anchors Away! Understanding historical Anchorworm parasitism of introduced warmwater fishes in the Willamette Basin, Oregon. Presentation at Research Advances in Fisheries and Wildlife. Corvallis, OR.	April 2022	Parasites are important for fish health and historically understudied. We are working to improve our understanding of the environmental and ecological drivers of anchorworms.
E. Simons, E., W. Krohn, and D. Harrison. Predicting responses of forest landscape changes on wildlife umbrella species: future projections results for Canada lynx and American marten. Poster presented at the Cooperators’ Meeting, Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono.	May 2010
E. Simons, D. J. Harrison, W. B. Krohn, K. Legaard, and S. Sader. ?Landscape indicators of forest biodiversity: Using American marten, Canada lynx, and snowshoe hares to evaluate retrospective trends in habitat supply across northern Maine.? Invited presentation at a workshop on Bridging Science and Stewardship sponsored by the Maine Cooperative Forestry Research Unit, Brewer, ME.	May 2008
Dionne, P.E., M.T. Kinnison, G.S. Wippelhauser, J.D. Zydlewski, G.B. Zydlewski. (2009) Outside the box: coastal movements of shortnose sturgeon and implications for management. School of Marine Science Graduate Symposium, Damariscotta, ME. May.	May 2009
Dionne, P., Zydlewski, G.B., Wippelhauser, G., Zydlewski, J., Kinnison, M. (2010) Movement Patterns of Shortnose Sturgeon in Coastal Maine Waters. Oral presentation at the Annual meeting of the North American Chapter of the World Sturgeon Conservation Society, Bozeman, MT. September 6-8.	September 2010
Dionne, P., Kinnison, M., Wippelhauser, G., Zydlewski, J. and Zydlewski, G. (2009) Outside the Box: Coastal Movements of Shortnose Sturgeon and Implications to Management. The Diadromous Species Restoration Research Network Science Meeting - Restoration of Diadromous Fishes and Their Ecosystems: Confluence of Science and Restoration. University of Maine, Orono, Maine. July 22-24.	July 2009
Dionne, P, Kinnison, M., Wippelhauser, G., Zydlewski, J., Zydlewski, G (2009) Outside the box: coastal movements of shortnose sturgeon and implications to management. 139th Annual Meeting of the American Fisheries Society. Nashville Tennessee. August 30-September 3.	September 2009
Dillingham, C., and Zydlewski, J. (2022) Using time-to-event models to characterize the impacts of a pool-and-weir fishway on upstream Alewife passage at a recently constructed fishway in Chelsea, ME, USA. 152^stAnnual Meeting of the American Fisheries Society. Spokane, WA.	August 2022	To assess the efficacy of the fishway to pass alewife, a PIT telemetry study is being conducted using returning adults. The study will employ a series of nine PIT antennas, distributed in a manner than will characterize the differential rates of passage between straight- and turn-pools as well as the terminal pool that houses a fish-counting weir.
Dillingham, C., and Zydlewski, J. (2022) Movement of Alewife around a hydroelectric dam on the Passadumkeag River. 2022 Atlantic Salmon Ecosystems Forum. January 11. University of Maine, Orono, Maine.	January 2022	To access spawning habitat in the upper reaches of the Passadumkeag River, a tributary of the Penobscot, migrating alewife must navigate a 70-meter denile-style fishway at the Lowell Tannery hydroelectric project (FERC No. 4202).To assess these components of passage, we captured alewife (n= 80) using a cast net at the base of the dam, tagged (radio and PIT) and released these fish 200m downstream, and monitored reapproach to the dam.
Dillingham, C., Zydlewski, J., Peterson, E., and Lasley-Rasher, R. (2020) Distribution and abundance of zooplankton in the Penobscot River estuary. 2019 Atlantic Salmon Ecosystems Forum. January 14. University of Maine, Orono, Maine.	January 2020	In the Penobscot River estuary, zooplankton are a crucial food source for many organisms such as juvenile shad (<i>Alosa sapidissima</i>) and river herring (Alewife, <i>A. pseudoharengus</i> and Blueback herring, <i>A. aestivalis</i>). To evaluate seasonal variations, sampling was conducted monthly (May to October) during the day and night at (or about) low tide within the same week.
Dillingham, C., Peterson, E., Zydlewski, J., and Lasley-Rasher, R. (2020) Food for Famished Fish – The Zooplankton of the Penobscot River Estuary. 150th Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 30.	August 2020	Zooplankton are a crucial food source for many organisms in the Penobscot River estuary, including juvenile Shad (<i>Alosa sapidissima</i>) and river herring (Alewife, <i>A. pseudoharengus</i> and Blueback Herring, <i>A. aestivalis</i>).To evaluate the dynamics of this population, zooplankton samples were collected at four river transects spanning the salinity gradient in the Penobscot River estuary.
Dillingham, C., Katz, L., York, G., and Zydlewski, J. (2024) Using multiple methods to assess the response of Sea Lamprey distribution to a major river restoration project in Maine. 154th Annual Meeting of American Fisheries Society, Honolulu, Hawai’i. September 15.	September 2024	In 2022-3, we radio tagged sea-run Sea Lamprey and tracked their movements at each mainstem hydropower dam and through each major river tributary upstream of the most seaward dam. In 2023, we also conducted an eDNA) survey to further inform the distribution.
Dillingham, C., Katz, L., York, G., Kinnison, M., and Zydlewski, J. (2024) Using eDNA surveys to describe sea lamprey and American eel distribution following the Penobscot River Restoration Project. The Atlantic Salmon Ecosystems Forum, University of Maine, Orono, Maine. January 9.	January 2023	In the summer of 2023, we conducted eDNA surveys throughout the Penobscot River watershed to describe the current distribution of sea lamprey and American eel. Water samples were collected from 70 sites representing 39 rivers and streams; species-specific genetic markers within those samples were amplified using qPCR to assess presence or absence.
Dillingham, C., Frechette, D., and Zydlewski, J. (2022) The Return of Native Sea Lampreys to the Penobscot River, Maine, USA. The Atlantic International Chapter of the American Fisheries Society. Newry, Maine. September 18.	September 2022	The Return of Native Sea Lampreys to the Penobscot River, Maine, USA.
Dillingham, C., Blomberg, E., Frechette, D., and Zydlewski, J. (2023) Assessing passage efficacy for Alewife at a state-of-the-art fishway. 153rd Annual Meeting of American Fisheries Society, Grand Rapids, Michigan. August 20.	August 2023	Togus Stream, a tributary of the Kennebec River, once had a native run of alewife but the construction of the Lower Togus Pond Dam in 1804 completely extirpated this population.Eight PIT antennas were distributed along the fishway to characterize the fishway’s efficacy for entry and passage.
Dever, M., Kocik, J., Zydlewski, J., Hebert, D., and Stich, D. (2016) Linkage between coastal conditions and migratory patterns and behavior of Atlantic Salmon smolts along the Halifax Line. 2016 Ocean Sciences Meeting. February 21-26. New Orleans, Louisiana.	February 2016	Understanding nearshore migration of Atlantic Salmon is a key to further improve management and conservation of this species. This work presents the movement patterns of Atlantic salmon near Halifax.
Dever, M., Kocik, J., Zydlewski, J., Hebert, D., and Greenan, B. (2014) Linkage Between coastal conditions and migration of Atlantic Salmon smolts along the Halifax Line. 144th Annual Meeting of the American Fisheries Society. Québec City, Canada. August 17-21.	August 2014	Understanding nearshore migration of Atlantic Salmon is a key to further improve management and conservation of this species. This study correlates acoustic detections of Atlantic salmon smolts tagged in the Penobscot River, and detected along the Halifax Line, with a wide range of co‐ located oceanographic data.
Danylchuk, A., Letcher, B., Zydlewski, J., Whiteley, A., Dubrieul,T., and Hurley, S. (2011) Movement patterns of brook trout (Salvelinus fontinalis) inhabiting a restored coastal stream in Massachusetts: preliminary evidence of anadromy. 141th Annual Meeting of the American Fisheries Society. Seattle, Washington. September 4-9.	September 2011
Damkot, P., Coghlan, Jr., S., and Zydlewski, J. (2009) The influence of riparian forest characteristics on terrestrial invertebrate input and brook trout diet in headwater streams. 139th Annual Meeting of the American Fisheries Society. Nashville Tennessee. August 30-September 3.	September 2009
D. J. Harrison, D. J., W. B. Krohn, and S. A. Scott. Effect of Forestry on Snowshoe Hare and Implications for Canada Lynx. Cooperative Forestry Research Unit Workshop, University of Maine, Orono.	May 2010
Cory, G. and Zydlewski, J. (2015) Assessing the influence of imprinting and stocking timing in the Penobscot River on smolt to adult returns. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 25.	March 2015	The effect of imprinting of salmon smolts on smolt to adult returns was tested using a stocking manipulation. No change in return rate was observed.
Cory, G. and Zydlewski, J. (2015) Assessing the influence of imprinting and stocking timing in the Penobscot River on smolt to adult returns. 1st Annual University of Maine Freshwater Science Symposium, University of Maine, Orono. January 29.	January 2015	The influence of imprinting in freshwater was tested using three years of releases of smolts into the Penobscot River. No additional returns were observed in fish given this treatment.
Coghlan, Jr., S., Zydlewski, J., Hogg, R., Gardner, C., Simon, K., and Saunders, R. (2012) Effects of Dam Removal on Anadromous Fishes, Resident Fishes, and Physical Habitat in a Coastal Maine Stream. Presented at the 2012 Northeastern Natural History Conference, Syracuse, NY April 16	April 2012
Coghlan Jr.,S.M., Hogg,R., Zydlewski, J., Simon,K. and Saunders, R. (2011) Barrier removal and range expansion of sea lamprey in the Penobscot River watershed: the importance of habitat conditioning in Atlantic salmon nursery streams. 141th Annual Meeting of the American Fisheries Society. Seattle, Washington. September 4-9.	September 2011
Casey, A., Mensinger, M., and Zydlewski, J. (2022) Characterizing White Catfish Movements in the Penobscot River. The Atlantic International Chapter of the American Fisheries Society. Newry, Maine. September 18.	September 2022	Characterizing White Catfish Movements in the Penobscot River
Bredeweg, E., Arismendi, I., Murphy, C.A., Henkel, S. The dark underside of floating solar panels: Iterative runs of CE-QUAL-W2 models as an assessment tool for understanding the effects of floating photovoltaic arrays on reservoir limnology. Presentation to the Oregon Lakes Association Meeting. November 15, 2023. Corvallis, OR.	November 2023	Floating solar is highlighted as a land sparing strategy for alternative energy production. It is likely to impact reservoir ecology given potential changes to light and temperature, important for lake processes. We used common reservoir models to assess the potential for changes in reservoir dynamics with floating solar installations.
Boyd, K., Barber, B., and Zydlewski, J. (2016) Relative abundance and size of zooplankton within the St. Croix Watershed prior to alewife recolonization 72nd Annual Northeast Fish & Wildlife Conference. April 3, 2016. Annapolis, Maryland.	April 2016	Fish passages have recently been re-opened at multiple dams on the St. Croix watershed allowing diadromous fish to return to this system after decades of purposeful blockage. As a part of a wider study to characterize the food web, we sampled three lentic sites (Spednic Lake, Woodland Flowage, and Grand Falls Flowage) in the system that are likely to be influenced by the reintroduction of alewife.
Benson, S., Murphy, C.A., Charney, N., Eggert, S., Fraver, S., Kenefic, L. 2024. Maine’s Secret Clam Flats: The Aquatic Diversity of Northern White-Cedar Forests. Presentation to the Society for Freshwater Science Annual Meeting, Philadelphia, PA.	June 2024	Northern white-cedar lowlands in Maine are wetland forest habitats. However, there remains a gap in the literature as to what types of aquatic biodiversity and processes these forests support and how those are impacted by forest management practices.
Begley, M., Coghlan, Jr., S., and Zydlewski, J. (2015) Understanding Commercial Harvest Impacts on White Suckers in Maine. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 25.	March 2015	Fishing harvest of suckers was assessed by comparison the lakes with or without commercial harvest. Differences in demography were compared to infer mortality rates.
Begley, M., Coghlan, Jr., S., and Zydlewski, J. (2015) Understanding Commercial Harvest Impacts on White Suckers in Maine. 1st Annual University of Maine Freshwater Science Symposium, University of Maine, Orono. January 29.	January 2015	Commercial harvest of suckers may shift demographics of the population. Data from fished and unfished waters were presented.
Begley, M., Coghlan, Jr., S., and Zydlewski, J. (2014) Impacts of Commercial Harvest on White Suckers. Maine Department of Inland Fisheries and Wildlife. Bangor, ME. , November 15. INVITED.	November 2014	Assessment of the potential role that commercial harvest may have on size and age structure. Methods are presented.
Begley, M., Coghlan, Jr., S., Zydlewski, J. (2015) Understanding commercial harvest impacts on white suckers in Maine. University of Maine Graduate Research Exposition, University of Maine, Orono. April 2.	April 2015	Lakes with and without commercial fishing were compared. Demographic shifts were described to infer mortality rates.
Begley, M., Coghlan, Jr., S. and Zydlewski, J. (2016) Understanding and Predicting Impacts of Commercial Harvest on White Suckers in Maine. Maine146th Annual Meeting of the American Fisheries Society. Kansas City, MO. August 23.	August 2016	The State of Maine allows the harvest of white suckers, Catostomus commersoni, during their spawning. In order to assess the potential impacts of high rates of commercial exploitation, we constructed a heuristic model of a white sucker population.
Begley, M., Coghlan, S.,and Zydlewski, J. (2015) Understanding Commercial Harvest Impacts on White Suckers in Maine. 145th Annual Meeting of the American Fisheries Society. Portland Oregon. August 16-20 INVITED.	August 2015	The state of Maine harvests white suckers, Catostomus commersonii, to provide lobster bait for coastal communities in early spring. Data will be used to compare lakes open and closed to harvest to infer white sucker sensitivity to commercial harvesting.
Barrie, A., Loftin, C. and Zydlewski, J. 2016. Changes in fish assemblages and chimpanzee communities after completion of the Bumbuna hydroelectric dam, northern Sierra Leone, West Africa. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 25.	March 2016	The Bumbuna project in Sierra Leone impounded nearby land. Information about resulting changes in fish and chimpanzee communities will inform future fisheries and wildlife management in the project area.
Barrie, A., Loftin, C. and Zydlewski, J. 2016. Changes in fish assemblages after completion of the Bumbuna hydroelectric dam, northern Sierra Leone, West Africa. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 25.	March 2016	The Bumbuna project in Sierra Leone impounded nearby land. Information about resulting changes in fish and chimpanzee communities will inform future fisheries and wildlife management in the project areas.
Barrie, A., Loftin, C. and Zydlewski, J. (2015). Influence of dam construction on chimpanzee distribution, abundance, and nest characteristics in the Bumbuna Hydroelectric Project, Northern Sierra Leone, West Africa. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 25.	March 2015	The Bumbuna project in Sierra Leone impounded nearby land. Changes in chimpanzee habitat use was considered.
Barrie, A., Loftin, C. and Zydlewski, J. (2015) Changes in fish assemblages after completion of the Bumbuna hydroelectric dam, northern Sierra Leone, West Africa. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 25.	March 2015	The Bumbuna project in Sierra Leone impounded nearby land. Changes in fish community was considered.
Barrie, A., Loftin, C. and Zydlewski, J. (2014) Changes in fish assemblages after completion of the Bumbuna hydroelectric dam on the Seli –Rokel River in Sierra Leone, West Africa. 144th Annual Meeting of the American Fisheries Society. Québec City, Canada. August 17-21.	August 2014	The Bumbuna hydroelectric dam is a run-of-river facility on the Seli/Rokel River 200km northeast of Freetown, Sierra Leone. We documented changes in the fish community in the river as part of a comprehensive assessment of the project’s effects.
Barrie, A., C.S. Loftin, and J. Zydlewski. 2015. Conservation status of western chimpanzee (Pan troglodytes verus) in the Bumbuna hydroelectric project, northern Sierra Leone, following impoundment by the dam. 6th annual SCCS-NY meeting of the American Museum of Natural History's Center for Biodiversity and Conservation, New York, NY, 7-9 October.	October 2015	The Bumbuna hydroelectric dam is a run-of-river facility on the Seli/Rokel River 200km northeast of Freetown, Sierra Leone. We documented response of chimpanzees in the area surrounding and impounded by the dam as part of a comprehensive assessment of the project’s effects.
Barber, B., and Zydlewski, J. (2016) Alewife (Alosa pseudoharengus) as Marine-Derived Nutrient Subsidies in Two Northeast Maine Rivers. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 23.	March 2016	Three fish-ways at main-stem dams on the St. Croix River had been unilaterally closed to diadromous fish passage since the late 1980s by the State of Maine. How changes in passage efficiency at three main stem might influence the population dynamics of the alewife run, and how these dynamics in turn may influence the flow and distribution of nutrients in the watershed were discussed.
Barber, B., and Zydlewski, J. (2016) Alewife (Alosa pseudoharengus) as Marine-Derived Nutrient Subsidies in Two Northeast Maine Rivers. 2016 Atlantic Salmon Ecosystems Forum. January 6-7. University of Maine, Orono, Maine.	January 2016	We used stable isotopes and nutrient diffusers to infer both trophic level and influence of marine derived nutrients in systems with and without strong alewife runs. Comparisons of data from the two systems will be presented.
Barber, B., Gibson, J., and Zydlewski, J. (2017) Marine-Derived Nutrient Cycling in the St. Croix River, Maine Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 22.	March 2017	Migrating adult alewife are a source of marine-derived nutrients on the east coast of North America, importing N and P into freshwater habitats. We developed a deterministic model to explore the theoretical nutrient dynamics of alewife migrations at differing spawner abundances.
Barber, B., Gibson, J., and Zydlewski, J. (2017) Does what go up also come down? Balancing recruitment with nutrient budget for alewife. 147th Annual Meeting of the American Fisheries Society. Tampa, FL. August 20.	August 2017	Migrating adult alewife are a source of marine-derived nutrients on the east coast of North America, importing N and P into freshwater habitats. We developed a deterministic model to explore the theoretical nutrient dynamics of alewife migrations at differing spawner abundances.
Barber, B., Gibson, J., O’Malley, A., and Zydlewski, J. (2019) Exploring how a range of management objectives could affect alewife population recovery. 2019 Maine Sustainability and Water Conference, Augusta, Maine. March 28.	March 2019	Many alewife populations in Maine have experienced recent increases in spawner abundance. We developed a population model using best available regional data to explore the theoretical influence of management actions in the St. Croix River.
Barber, B., Gibson, J., O’Malley, A., and Zydlewski, J. (2019) Exploring how a range of management objectives could affect alewife population recovery. 2019 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. March 26. (Poster)	March 2019	Alewife runs bring critical nutrients into freshwater systems. We model hos passage may influence the ecology of river systems.
Barber, B., Gibson, J., O’Malley, A., and Zydlewski, J. (2018) Marine-Derived Nutrient Cycling in the St. Croix River, Maine. Maine Cooperative Fish and Wildlife Research Unit Cooperator’s Meeting, March 22. University of Maine, Orono.	March 2018	Alewife have been blocked from accessing spawning habitat in the St Croix River. We are using modeling and stable isotopes to understand their recolonization patterns.
Barber, B., Gibson, J., O’Malley, A., and Zydlewski, J. (2018) Exploring how a range of management objectives could affect alewife population recovery. 148th Annual Meeting of the American Fisheries Society. Atlantic City, New Jersey. August 20.	August 2018	Many alewife populations in Maine have experienced recent increases in spawner abundance. To inform management practices for alewife recovery, we developed a population model using best available regional data to explore the theoretical influence of specific management actions in the St. Croix River.
Barber, B., Gibson, J., Molina Moctezuma, A., and Zydlewski, J. (2019) A tool for understanding likely fish passage and harvest management outcomes for alewife on the St. Croix River, Maine. IJC St. Croix Board & Partners Meeting. St. Stephen, New Brunswick, Canada. June 4.	June 2019	Alewife populations are increasing in the St Croix River. We developed an on line tool to explore the theoretical population response to changing fish passage.
Barber, B., Gibson, J., Molina Moctezuma, A., and Zydlewski, J. (2018) A tool for understanding likely fish passage and harvest management outcomes for alewife on the St. Croix River, Maine. 148th Annual Meeting of the American Fisheries Society. Atlantic City, New Jersey. August 20.	August 2018	Large spawning populations of anadromous alewives were historically found in the St. Croix River, Maine. We are developing a user friendly, web-based management tool that will allow managers and stakeholders to weigh the theoretical pros and cons of specific scenarios.
Barber, B. and Zydlewski, J. (2016) How changes in passage efficiency of alewife at main stem dams can influence nutrient dynamics in the St. Croix River, ME. Maine146th Annual Meeting of the American Fisheries Society. Kansas City, MO. August 23.	August 2016	Three fish-ways at main-stem dams on the St. Croix River had been unilaterally closed to diadromous fish passage since the late 1980s by the State of Maine. A model was developed to determine how changes in passage efficiency at three main stem might influence the population dynamics of the alewife run, and how these dynamics in turn may influence the flow and distribution of nutrients in the watershed.
Barber, B. and Zydlewski , J. (2016) Marine-Derived Nutrient Cycling in the St. Croix River, Maine. International St. Croix River Watershed Board Meeting Calais, Maine June 14	June 2016	The work modeled the recovery of alewife in the St Croix River. The results indicate passage at the second dam (Woodland) is a limitation for recovery.
Bailey, M., Zydlewski,J.,and Hawkes, J. (2009) Evaluation of passage success of Atlantic salmon smolts through the Penobscot River and Estuary, Maine	January 2009
Bailey, M., Zydlewski, J., Grote, A. (2012) DIDSON Assessment of Fish Approaching an Hydroelectric Dam. Oral presentation at the Atlantic International Chapter of the American Fisheries Society, Averill, VT. September 23, 2012.	September 2012	Assessment of Fish Approaching an Hydroelectric Dam.
Bailey, M., Grote, A. and Zydlewski, J. (2010) American shad in the Penobscot River: Choosing recovery tools. 140th Annual Meeting of the American Fisheries Society. Pittsburgh, Pennsylvania. September 13-16.	September 2010
Bailey, M. and Zydlewski, J. (2011) Downstream .Success and Survival for Out-migrating Atlantic Salmon Smolts in the Penobscot River. 67th Northeast Fish and Wildlife Conference, Manchester, New Hampshire, April 17	April 2011
Bailey, M. and Zydlewski, J. (2011) American shad in the Penobscot River: choosing management tools. 67th Northeast Fish and Wildlife Conference, Manchester, New Hampshire, April 17.	April 2011
Bailey, M. and Zydlewski, J. (2010) Multi-state models of downstream migrating Atlantic salmon smolts in the Penobscot River. 140th Annual Meeting of the American Fisheries Society. Pittsburgh, Pennsylvania. September 13-16.	September 2010
Bahn, V., R. J. O'Connor, and W. B. Krohn. The role of dispersal in shaping bird distribtuions. Meeting of the American Ornithologists' Union and Society of Canadian Ornithologists. Laval University, Quebec City, Quebec, CANADA.	August 2004
Bahn, V., R. J. O'Connor, and W. B. Krohn. Model selection for species distribution models incorporating spatial autocorrelation. Abstract and presentation to the Northeast Fish and Wildlife Conference, Newport, RI.	April 2003
Atkinson, E., and Zydlewski, J. (2022) Applying Dispersal Patterns to Identify Optimal Egg Planting Locations for Atlantic Salmon in Eastern Maine, USA. 152^stAnnual Meeting of the American Fisheries Society. Spokane, WA.	August 2022	The Gulf of Maine Distinct Population Segment of Atlantic salmon has suffered from habitat loss and exploitation over the last century. Egg planting maximizes wild rearing opportunities which can be important for adaptation.
Atkinson, E., and Zydlewski, J. (2020) Examining dispersal of point stocked Atlantic salmon (Salmo salar) fry relative to habitat qualities in streams in eastern Maine, USA. 2019 Atlantic Salmon Ecosystems Forum. January 14. University of Maine, Orono, Maine.	January 2020	The Gulf of Maine Distinct Population Segment of Atlantic salmon has suffered from habitat loss and exploitation over the last century. Hatchery supplementation has unquestionably prevented the extirpation of the species over the last decades, but risks domestication effects. Egg planting and fry stocking replicate the natural spawning process in streams and provide a natural experience which can be important maintaining wild traits.
Atkinson, E., and Zydlewski, J. (2020) A tool to optimize egg planting of Atlantic salmon using habitat quality and dispersal patterns. 150th Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 30.	August 2020	Egg planting maximizes wild rearing opportunities which can be important for adaptation.These data are being used to develop a tool to optimize selection based on the area to be stocked, the number of eggs available, and the ease of access.
Atkinson, E., and Zydlewski, J. (2019) Examining dispersal of point stocked Atlantic salmon fry relative to habitat qualities in streams in eastern Maine, USA.149th Annual Meeting of the American Fisheries Society. Reno Nevada. September 29.	September 2019	The Gulf of Maine Distinct Population Segment of Atlantic salmon has suffered from habitat loss and exploitation over the last century. Results of this study will inform decisions related to stocking intervals, habitat use, and stocking rates.
Atkinson, E. and Zydlewski, J. (2021) Using dispersal data to optimize egg planting strategies for Atlantic Salmon. 151^st Annual Meeting of the American Fisheries Society. Baltimore, MD. November 6.	November 2021	Hatchery supplementation has unquestionably prevented the extirpation of Atlantic salmon, but stocking methods represent tradeoffs between survival, domestication and logistics. We sought to develop an optimization tool that would allow managers to best select the number of eyed egg batches and their planting locations within a drainage targeted for supplementation.
Atkinson, E. and Zydlewski, J. (2019) Optimizing strategies to hydraulically plant Atlantic salmon eggs based on fry dispersal patterns. 2019 Maine Sustainability and Water Conference, Augusta, Maine. March 28.	March 2019	Egg planting is a process by which fertilized eggs from the hatchery are injected into the gravel in the fall, replicating the natural spawning process in streams and provides a natural experience which can be important for adaptation. We propose to characterize the dispersal pattern of egg planted Atlantic salmon as a function of habitat and use these data to construct a GIS based tool to inform stocking.
Atkinson, E. and Zydlewski, J. (2019) Optimizing strategies to hydraulically plant Atlantic salmon eggs based on fry dispersal patterns. 2019 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. March 26. (Poster)	March 2019	Atlantic salmon are endangered in Gulf of Maine, and maintained by hatchery stocking. We present data on the ioptimization of egg planting as a strategy.
Atkinson, E. and Zydlewski, J. (2024) Identifying Optimal Egg Planting Scenarios for Atlantic Salmon (Salmo salar) in Eastern Maine, USA. The Atlantic Salmon Ecosystems Forum, University of Maine, Orono, Maine. January 9.	January 2024	We developed a model to estimate recruitment to the 0+ parr based on patterns of egg planting, post-emergent fry dispersal patterns, and habitat specific survival. We developed a tool that allows managers to compare a range of stocking numbers and locations in a river network to optimize recruitment and minimize effort.
Atkinson, E. and Zydlewski, J. (2022) Using dispersal data to optimize egg planting strategies for Atlantic Salmon. 2022 Atlantic Salmon Ecosystems Forum. January 11. University of Maine, Orono, Maine.	January 2022	Egg planting maximizes wild rearing opportunities which may be important for adaptation.We sought to develop an optimization tool that would allow managers to best select the number of eyed egg batches and their planting locations within a drainage targeted for supplementation.
Antonelli, K., Murphy, C.A., Pollock, A., Gerth, W., and Arismendi, I. 2022. Hunting tiny vampires: modeling the distribution of a salmonid ectoparasite in Willamette Valley Reservoirs. 2022 Oregon Chapter of the American Fisheries Society Annual Meeting (virtual).	March 2022	The freshwater copepod <i>Salmincola californiensis</i> is an ectoparasite affecting salmonids in the genus <i>Oncorhynchus</i>. Information gained from our modeling effort on the infectious copepodid lifestage will be useful for guiding management decisions made by biologists and reservoir operators regarding salmon populations in reservoirs.
Antonelli, K., Murphy, C.A., Pollock, A., Gerth, W., Arismendi, I. 2022. The (tiny) vampire diaries: exploring distribution, abundance, and in vitro development of the ectoparasite Salmincola californiensis in Willamette Valley Reservoirs. Presentation at the 61st Western Fish Disease Workshop. Hood River, Oregon.	May 2022	The freshwater copepod <i>Salmincola californiensis</i> is an ectoparasite affecting salmonids in the genus <i>Oncorhynchus</i>. Information gained from our efforts will be useful for guiding management decisions made by biologists and reservoir operators regarding salmon populations in reservoirs.
Ames, C., Zydlewski, G.,Kinnison, M., Zydlewski, J., and Stewart, N. 2020. Atlantic and Shortnose Sturgeon population age structure and growth in the Gulf of Maine. North American Sturgeon and Paddlefish Society. Remote presentation. October 26.	October 2020	Movements of shortnose sturgeon from the Kennebec River to the Penobscot River may occur seasonally, with clear patterns of habitat use by some individuals. Both species are likely exploiting feeding opportunities in the Penobscot, as spawning has not been observed in this system.
Ames, C., Zydlewski, G., Kinnison,M., and Zydlewski, J. (2020) Age structure of non-reproductive, partial migratory populations of sturgeon species in the Penobscot River, Maine. 2019 Atlantic Salmon Ecosystems Forum. January 14. University of Maine, Orono, Maine.	January 2020	Age structure of recovering populations of anadromous Atlantic (<i>Acipenser oxyrinchus</i>) and Shortnose sturgeon (<i>A. brevirostrum</i>) are not well understood in the Gulf of Maine. Our goal was to address this question by developing an age-at-length model for these species.
Ames, C., Zydlewski, G., Kinnison, M., and Zydlewski, J. (2020) Age structure of recovering populations of sturgeon species in the Penobscot River, Maine. 150th Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 30	August 2020	Age structure of Atlantic (<i>Acipenser oxyrinchus</i>) and Shortnose sturgeon (<i>A. brevirostrum</i>) are not well understood in the Penobscot River. Based on Von Bertalannfy growth models, growth rate per year was 0.07 and 0.06 for Atlantic and Shortnose sturgeon, and followed positive and negative latitudinal clines for growth and age, respectively.
Ames, C., Zydlewski, G., Kinnison, M., and Zydlewski, J. (2018) Population-level responses of sturgeon to dam removals in Maine. 74th Annual Northeast Fish & Wildlife Conference. April 15. Burlington, Vermont.	April 2018	Atlantic Sturgeon (Acipenser oxyrhynchus) and Shortnose Sturgeon (A. brevirostrum) are anadromous species federally listed under ESA,in the Gulf of Maine (GOM). We have combined mark-recapture methods with acoustic telemetry data approaches to generate biologically realistic population estimates.
Ames, C., Zydlewski, G., Kinnison, M., and Zydlewski, J. (2018) Population characteristics of sub-adult Atlantic Sturgeon (Acipenser oxyrhynchus) in the Penobscot River, Maine. 2018 Atlantic Salmon Ecosystems Forum. January 17. University of Maine, Orono, Maine.	January 2018	Atlantic Sturgeon (Acipenser oxyrinchus) is an anadromous species listed as federally threatened in the Gulf of Maine (GOM). Our goal was to determine population size and demographic characteristics such as growth and condition in the Penobscot River, Maine
Ames, C., Zydlewski, G., Kinnison, M., and Zydlewski, J. (2017) Road to Success: Determining the status and responses of Gulf of Maine sturgeon to management. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 22.	March 2017	In 2012 a major cooperative effort resulted in the removal of the two lowermost dams on the Penobscot River, Maine restoring the presumed historic ranges of shortnose sturgeon. Associated changes in demographic measures were also explored.
Ames, C., Zydlewski, G., Kinnison, M., and Zydlewski, J. (2017) Population-level responses of sturgeon to dam removals in Maine. 147th Annual Meeting of the American Fisheries Society. Tampa, FL. August 20.	August 2017	In 2012 a major cooperative effort resulted in the removal of the two lowermost dams on the Penobscot River, Maine restoring the presumed historic ranges of shortnose sturgeon. Associated changes in demographic measures were also explored.
Ames, C., Neary, M., Pettigrew, N., Kinnison, M., Zydlewski, J., and Zydlewski, G. (2018) Population characteristics of sub-adult Atlantic Sturgeon in the Penobscot River, Maine. Maine Cooperative Fish and Wildlife Research Unit Cooperator’s Meeting, March 22. University of Maine, Orono.	March 2018	Atlantic sturgeon have been recently listed as threatened in the Gulf of Maine. We are using telemetry and recapture methods to inform population level patterns.
Ames, C., Neary, M., Pettigrew, N., Kinnison, M., Zydlewski, J., Zydlewski, G. (2018) Use of a slocum glider for active tracking and winter habitat description of Atlantic Sturgeon (Acipenser oxyrinchus oxyrinchus) in mid-coast Maine. 148th Annual Meeting of the American Fisheries Society. Atlantic City, New Jersey. August 20.	August 2018	Atlantic Sturgeon (Acipenser oxyrinchus oxyrinchus) are listed as federally threatened in the Gulf of Maine (GOM). Based on acoustic telemetry in the GOM, sub-adults spend about six months at sea during winter before returning to rivers in late spring.
Ames, C., Kinnison, M., Zydlewski, J., and Zydlewski, G. (2019) Recovery of shortnose and Atlantic sturgeon in the Penobscot River, Maine. 2019 Maine Sustainability and Water Conference, Augusta, Maine. March 28.	March 2019	Atlantic sturgeon (Acipenser oxyrhynchus) and shortnose sturgeon (A. brevirostrum) are anadromous species listed as threatened and endangered, respectively, in the Penobscot River. To generate biologically realistic estimates of abundance in the Penobscot River, we have combined mark-recapture methods with acoustic telemetry analysis.
Ames, C., Kinnison, M., Zydlewski, J., and Zydlewski, G. (2019) Recovery of shortnose and Atlantic sturgeon in the Penobscot River, Maine. 2019 Coordinating Committee Meeting of the U.S. Geological Survey, Maine Cooperative Fish and Wildlife Research Unit. Orono, ME. March 26. (Poster)	March 2019	Sturgeon species are endangered in the Gulf of Maine. We present data on the the Penobscot River populations
Ames, C., Kinnison, M., Zydlewski, J., and Zydlewski, G. (2019) Foraging ecology and prey availability of Atlantic and shortnose sturgeon populations in Maine. 149th Annual Meeting of the American Fisheries Society. Reno Nevada. September 29.	September 2019	Atlantic (Acipenser oxyrhynchus) and Shortnose (A. brevirostrum) sturgeon are anadromous species that are listed as threatened and endangered, respectively, in the Gulf of Maine (GOM).Within the GOM, both species make migrations between the Penobscot and Kennebec Rivers, though spawning occurs in the Kennebec. Movements to the Penobscot may provide increased foraging opportunities or release from density dependent competition.
Altenritter,M., Kinnison, M., Zydlewski, G., Zydlewski, J., and Secor, D. (2015) Dorsal scutes: an otolith alternative to infer the origins and life histories of shortnose sturgeon (Acipenser brevirostrum). 145th Annual Meeting of the American Fisheries Society. Portland Oregon. August 16-20 INVITED.	August 2015	The imperiled status of sturgeon worldwide places great importance on elucidating individual life histories. We propose dorsal scutes from sturgeon as a non-lethal alternative to otoliths and fin rays for inferring life histories and movements of sturgeons.
Altenritter, M., Zydlewski, G., Kinnison, M., Zydlewski, J., Secor, D., and Sigourney, D. (2015) Shortnose sturgeon population dynamics in the Gulf of Maine. Annual meeting of the Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. March 25.	March 2015	Shortnose sturgeon move between systems in the Gulf of Maine. These movements have implications for the management of this endangered species.
Altenritter, M., Kinnison, M., Zydlewski, G., Zydlewski, J., and Yates, M. (2014) Microchemical analysis of dorsal scutes to infer the origins and life histories of shortnose sturgeon. 144th Annual Meeting of the American Fisheries Society. Québec City, Canada. August 17-21.	August 2014	Determining individual origins, movements and life histories within complex population networks is important for understanding how such networks function as a whole. We investigated the use of dorsal scutes from shortnose sturgeon as a hard structure that could be used for chronological analysis.
Altenritter, M., Kinnison, M., Zydlewski, G., Zydlewski, J., and Yates, M. (2014) Assessing microchemical analysis of dorsal scutes to infer the origins and life histories shortnose sturgeon. 2014 Atlantic Salmon and Their Ecosystems Forum, University of Maine, Orono. January 8.	January 2014	This work presents data on the use of sturgeon bony plates (scutes) for the chronological assessment of environmental use via microchemical analysis. Strontium:Calcium ratios are used to infer time spent in freshwater and seawater.
Altenritter, M., Dzaugis,M., Zydlewski,G., Kinnison,M., Zydlewski, J., and Wippelhauser, G.(2013) Shortnose sturgeon of the Penobscot: local residency and regional connections Poster presentation to DSSRN, January 10.	January 2013	This work presents movement data for endangered shortnose sturgeon between river systems.
Altenritter, M., Zydlewski, G., Kinnison, M., and Zydlewski, J. (2012) Coastal river connectivity and shortnose sturgeon: a metapopulation perspective. 2012 Forum, Atlantic Salmon and their Ecosystems, Bangor Maine January 10-11.	January 2012
Altenritter, M., Zydlewski, G., Kinnison, M., Dzaugis, M., Zydlewski, J., Altenritter M. (2014) Atlantic sturgeon movements and habitat use in the Penobscot River, with implications of dam removal. 144th Annual Meeting of the American Fisheries Society. Québec City, Canada. August 17-21.	August 2014	Historically, coastal rivers along the Atlantic coast supported large populations of Atlantic sturgeon (Acipenser oxyrinchus), but overharvest, habitat loss, and habitat degradation have decimated populations. Since 2006, 181 Atlantic sturgeon have been captured, 43 of which were tagged with acoustic transmitters, and monitored in the Penobscot River, Maine.
Altenritter, M. E. L., Zydlewski, G. B., Kinnison M. T., Zydlewski, J. D., Wippelhauser, G. S., and Sulikowski, J.A. (2011) Coastal river connectivity and shortnose sturgeon: a metapopulation perspective. 141th Annual Meeting of the American Fisheries Society. Seattle, Washington. September 4-9.	September 2011
Altenritter, M. Zydlewski, G., Altenritter, M., Kinnison, M., and Zydlewski, J. (2014) Demographics and movement patterns of Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus) in the Penobscot River, Maine. 2014 Atlantic Salmon and Their Ecosystems Forum, University of Maine, Orono. January 8.	January 2014	Atlantic sturgeon in the Gulf of Maine have been recently listed under ESA. Characterization of sub-adult habitat use in the Penobscot River is presented.
Zydlewski, J. (2023) Are there too many alewife? Augusta DEP Water Conference, Invited Plenary, Brunswick Maine, April 19	April 2023	Are there too many alewife?
Zydlewski, J., Stich, D., Roy, S., Sheehan, T., Sprankle, K., Bailey, M. (2022) What have we lost? American shad’s impounded history. 2022 Atlantic Salmon Ecosystems Forum. January 11. University of Maine, Orono, Maine.	January 2022	American shad (<i>Alosa sapidissima</i>) are native to the east coast of North America from the St. Johns River, Florida, to the St. Lawrence River region in Canada. To assess the impact of dams, we estimated the historically accessed spawning habitat in coastal rivers (485,618 river segments with 21,113 current dams) based on (i) width, (ii) distance from seawater, and (iii) slope (to exclude natural barriers to migration) combined with local knowledge.
Zydlewski, J., Coghlan.Jr., S., Dillingham, C., Figueroa-Muñoz, G., Merriam, C., Smith, S., Smith, R., Stich, D., Vogel, S., Wilson, K., and Zydlewski, G. (2024) Seven dam challenges for migratory fish: insights from the Penobscot River. The Atlantic Salmon Ecosystems Forum, University of Maine, Orono, Maine. January 9.	January 2023	Herein we discuss the seven interconnected and complex ways that dams have affected the Penobscot River ecosystem. These include familiar influences ascribed to dams and other ecological influences.
Zydlewski, J., Carr, T., Flye, M., Frechette, D., Kircheis, D., Loring, Jr., C., McCaw, D., Merriam, C., Sponarski, C. Restoring migratory fish and their cultural connection in the Penobscot River. 154th Annual Meeting of American Fisheries Society, Honolulu, Hawai’i. September 15.	September 2024	Abundant sea run-fish once connected indigenous people to the Penobscot River through nutritional and cultural sustenance. We explore the current regulatory structure for Atlantic salmon to understand the roles of the Penobscot Nation.
Zydlewski, J. (2023) Aquaculture and fish conservation. Down East Salmon Federation, Machias Maine, April 6.	April 2023	Aquaculture and fish conservation
Zydlewski, J. (2023) Aquaculture and fish conservation. Council of the Atlantic Salmon Federation, Brewer, Maine, April 22.	April 2023	Aquaculture and fish conservation
Zydlewski, J. (2020) The lovable lamprey. Penobscot County Conservation Association. Brewer, ME. January 9.	January 2020	Lamprey have a bad reputation, but are indigenous to the north east. Their ecology and restoration were discussed.
Zydlewski, J. (2020) Diadromous fish research in the Penobscot River. Atlantic International Chapter of the American Fisheries Society, Virtual Meeting. August 25.	August 2020	For more than 15 years coop unit studentrs have been studying the Penobscot River. A time line of discovery was presented.
298. Greig, H. S., Ramberg-Pihl, N., Coghlan, Jr., S. and Zydlewski, J. (2016). Improving assessment of critical habitat for Atlantic salmon in a rapidly-changing climate. Maine Sea Grant Research Symposium. University of Maine, Orono. April 15.	April 2016	Presentation of work intended to characterize the role of inter and intra-specific competition in habitat choice for Atlantic salmon. Approaches and expectations are discussed.
2022 Vogel, S.K., Loftin, C., Zydlewski, J.D. Collaborative networks within the CRU program. [oral, invited] Atlantic International Chapter of the American Fisheries Society Annual Conference. September 18, 2022. Newry, ME.	September 2022	The U.S. Geological Survey’s (USGS) Cooperative Fish and Wildlife Research Units (CRU) program establishes relationships among the USGS, U.S. Fish and Wildlife Service, Wildlife Management Institute, host universities, and state resource agencies. This research focuses on analyzing Unit scientist impacts and outputs by assessing the collaborative networks of the Units and the production of scientific publications as one measure of impact.
2022 Vogel, S.K., Loftin, C., Zydlewski, J.D. Collaborative networks within the CRU program. [oral, invited] Atlantic International Chapter of the American Fisheries Society Annual Conference. September 18, 2022. Newry, ME.	September 2022	text
Izzo, L., Maynard, G. and Zydlewski, J. (2016) Behavior and Upstream Passage of Atlantic Salmon at the New Milford Fish Lift on the Penobscot River, ME. 2016 Atlantic Salmon Ecosystems Forum. January 6-7. University of Maine, Orono, Maine.	January 2016	The PRRP is expected to increase upstream habitat access for Atlantic Salmon, however this increase is dependent upon successful passage at a newly constructed fish lift at Milford Dam, as nearly all suitable spawning habitat is located upstream of Milford. In 2014 and 2015, a total of seventy three adult salmon were captured at Milford, radio and PIT tagged, and displaced downstream in tidal reaches below the removed dams to track their upstream migration through the lower Penobscot River.
Fuller, A. K., D. J. Harrison, and W. B. Krohn. Landscape planning for northern Maine forestlands using area sensitive umbrella species. Maine Cooperative Forestry Research Unit, University of Maine, Orono.	April 2010

Theses and Dissertations

Theses and Dissertations	Publication Date
Whittum, K.A., 2022. Evaluation of Fish Assemblage Composition and the Expansion of an Invasive Species Following Dam Removal and Upgraded Fish Passage in the Penobscot River, Maine. The University of Maine.	January 2022
Weaver 2017. Ph.D. Sea lamprey (Petromyzon marinus) as a functional link between marine and freshwater ecosystems. University of Maine, Orono. 147pp.	September 2017
Wathen, R. 2010. MS Thesis: The Interactive Ecology of Juvenile Atlantic Salmon and Smallmouth Bass: Competition for Habitat.	June 2010
Vogel, S., 2019. Fish Passage and Hydropower: Investigating Resource Agency Decision-making During the FERC Hydropower Relicensing Process. The University of Maine.	January 2019
Stich, D.S. 2014. Phenology and effects of dams on the success of Atlantic salmon migrations in the Penobscot River, Maine. Ph.D. dissertation, Wildlife Ecology, University of Maine, Orono, 257 pp.	December 2014
Spencer, R. 2009. MS Thesis: Migratory Urge and Gill Na+,K+-ATPase Activity of Hatchery Reared Atlantic Salmon Smolts from Dennys and Penobscot River Stocks, Maine and a Review of Enhancement Programs.	October 2009
Simons, E.M. 2009. Influence of past and future forest management on the spatiotemporal dynamics of habitat supply for Canada lynx and American martens in northern Maine. Ph.D. Dissertation, University of Maine, Orono. 229 pp.	August 2009
Scott, Shonene A. 2009. Spatio-temporal Dynamics of Snowshoe Hare Density and Relationships to Canada Lynx Occurrence in northern Maine. M.S. Thesis, University of Maine, Orono. 190 pp.	December 2009
Rubenstein, S.R., 2021. Energetic impacts of passage delays in migrating adult Atlantic Salmon. The University of Maine.	August 2021
Ratten, Silas Kane. "Behavior, Ecology, and Restoration of Lake whitefish (Coregonus clupeaformis) and Arctic Charr (Salvelinus alpinus) in Maine Lakes." (2013).	December 2013
Peterson, E., 2022. The Long-term Impact of Dam Removals on Penobscot River Migratory Fishes. The University of Maine.	January 2022
O’Malley 2016. M.S. Assessment of a hatchery based rainbow smelt supplementation effort	January 2016
Molina Moctezuma, A., 2020. Movement and Survival of Atlantic Salmon Smolts in the Penobscot River, Maine.	August 2020
Mensinger, M., 2020. American Eel Behavior and Survival in an Impounded River System. The University of Maine.	December 2020
Maynard, G.A., 2019. Assessing Migrations and Habitat Connectivity for two Anadromous Species Following a Major Restoration Effort in the Penobscot River, Maine.	May 2019
Kayzak, D. 2011. Growth and movement of brook char (Salvelinus fontinalis) in coastal Maine. M.S. Thesis, University of Maine.	May 2011
Katz (2023) Integrating environmental DNA, traditional fisheries techniques, and species distribution modeling to assess bridle shiner status in Maine	January 2023
Jackson, C. 2009. MS Thesis: Fishing, Water Regulation and Competition: the Past, Present and Future of Brook Trout in the Rapid River, Maine.	October 2010
Izzo, L. K. 2016. Exploring the threats of dams and ocean conditions: In-river movements and ocean growth of Atlantic salmon (Salmo salar) from Maine's rivers. Weaver 2017. Ph.D. Sea lamprey (Petromyzon marinus) as a functional link between marine and freshwater ecosystems.	August 2016
Holbrook, C. 2007. MS Thesis: Behavior and survival of Migrating Atlantic salmon (Salmo salar) in the Penobscot River and Estuary Maine: Acoustic Telemetry Studies of Smolts and Adults.	March 2007
Hogg 2012 M.S. Thesis: Fish Community response to a small-stream dam removal in a coastal Maine tributary.	March 2012
Guyette, Margaret Q. 2012. Responses of Atlantic salmon stream communities to marine-derived nutrients. Ph.D. dissertation, Wildlife Ecology, University of Maine, Ornon, 195pp.	December 2012
Grote 2013. M.S. Migration and spawning behavior of a remnant population of American shad (Alosa sapidissima) prior to dam removal.	May 2013
Gorsky, D. 2011. Lake whitefish (Coregonus clupeaformis) habitat utilization, early life history, and interactions with rainbow smelt(Osmerus mordax) in northern Maine. Ph.D. Dissertation.	May 2011
Gardner, C. 2010. Distribution and abundance of fishes in relation to barriers: Implications for monitoring stream recovery after barrier removal. M.S. Thesis.	May 2010
Flye, M., 2019. Getting Over the Dam: Overcoming Institutional Barriers to the Recovery of Atlantic Salmon by Navigating the Social-science/policy interface. The University of Maine.	December 2019
Begley 2016. M.S. Understanding the impact of commercial harvest on white suckers (Catostomus commersonii) in Maine. University of Maine, Orono. 105 pp.	December 2016
Barrie 2016. M.S. Changes in fish communities and chimpanzee ecology in the bumbuna hydroelectric project area following dam impoundment	January 2016
Barber, Betsy. 2018. Ph.D. Marine nutrient cycling in the St.Croix River, Maine. University of Maine. pp 234. May 2018	May 2018
Atkinson, E.J., 2023. Optimizing Strategies To Hydraulically Plant Atlantic Salmon Eggs Based On Fry Dispersal Patterns.	January 2023

Technical Publications

Technical Publications	Publication Date
Zydlewski, J. and C.S. Loftin. 2008. Using dendrochonology and stable isotopes to document historical deposition of marine derived nutrients in the Penobscot River Basin, Maine, Report to Penobscot Indian Nation, 4 pp.	March 2008
Zydlewski, G. , Zydlewski, J. (2006) Final Report: Does descaling impair osmoregulatory ability in seawater challenged Atlantic salmon smolts. University of Maine Faculty Research Funds Report.	December 2006
Studies on Lake Whitefish in Maine. (2006) Annual Report to the Maine Department of Inland Fisheries and Wildlife.	September 2006
Studies on Lake Whitefish in Maine. (2006) Annual Report to the Maine Department of Inland Fisheries and Wildlife.	October 2007
Studies on Lake Whitefish in Maine. (2006) Annual Report to the Maine Department of Inland Fisheries and Wildlife.	December 2006
Spencer, R. , Zydlewski, J., Zydlewski, G. (2006) Comparing the migratory behavior and physiology of Atlantic salmon smolts from Dennys and Penobscot River Stocks. NOAA Annual Report.	December 2006
Simons, E., K. Legaard, D. Harrison, S. Sader, J. Wilson, W. Krohn, and L. Robinson. 2007. Predicting responses of forest landscape change on wildlife umbrella species. 2007 Annual Report of the Maine Cooperative Forestry Research Unit (CFRU), University of Maine, Orono. (posted on the CFRU's web site).	July 2007
Rustigian, H. L., and W. B. Krohn. 2002. GIS-based evaluation system for waterfowl and wading bird habitats in Maine. Final contract report to the Maine Department of Inland Fisheries and Wildlife, Augusta. 63 pp.	June 2002
Robinson, L., W. Krohn, and D. Harrison. 2007. Responses of snowshoe hares and Canada lynx to forest harvesting in northern Maine. 2007 Annual Report of the Maine Cooperative Forestry Research Unit (CFRU), University of Maine, Orono. (posted on the CFRU's web site).	July 2007
Loftin, C.S., J. Zydlewski, and A.Elskus. 2008. Examination of mercury contamination in northern two-lined salamanders and slimy sculpin inhabiting watersheds in coastal Maine, Report to Maine Outdoor Heritage Fund, 15 pp	March 2008
Krohn, W.B., and C.S. Loftin (compilers and editors). 2005. Maine Cooperative Fish and Wildlife Research Unit and Department of Wildlife Ecology - 2005 Report to Cooperators. Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono, ME. 54 pp.	February 2006
Krohn, W. and C. S. Loftin. 2010. Department of Wildlife Ecology and Maine Cooperative Fish and Wildlife Research Unit Annual Report to Cooperators. 49pp.	January 2011
Krohn, W. B., and John R. Moring (editors). 2002. Maine Cooperative Fish and Wildlife Research Unit - 2001 Report to Cooperators. Maine Coperative Fish and Wildlife Research Unit, University of Maine, Orono, ME. 51pp	January 2002
Krohn, W. B., and J. R. Moring (editors). 2001. Maine Cooperative Fish and Wildlife Research Unit - 2000 Report to Cooperators. Maine Cooperative Fish and Wildlife Research Unit, Univeristy of Maine, Orono, Maine. 50 pp.	September 2001
Krohn, W. B., and J. A. Hepinstall. 2000. A habitat-based approach for identfying open-space conservation needs in southern Maine. Final Contract Report in the Maine Department of Inland Fisheries and Wildlife, Augusta, ME. 36 pp. plus appendices.	January 2000
Krohn, W. B., and D. J. Harrison. 2005. Canada lynx in the north Maine woods. Pages 8 & 9 IN North Maine Woods - Experience the Tradition. North Maine Woods Association, Ashland, ME. 28pp.	June 2005
Krohn, W. B., and C. S. Loftin (compilers and editors). 2009. Maine Cooperative Fish and Wildlife Research Unit and Department of Wildlife Ecology. 2008 Report to Cooperators. Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. 43 pp.	February 2009
Krohn, W. B., and C. S. Loftin (compilers and editors). 2008. Maine Cooperative Fish and Wildlife Research Unit and Department of Wildlife Ecology. 2007 Report to Cooperators. Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. 38 pp.	January 2008
Krohn, W. B., and C. S. Loftin (compilers and editors). 2004. Maine Cooperative Fish and Wildlife Research Unit and Department of Wildlife Ecology - 2003 Report to Cooperators. Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono, ME. 45pp.	March 2004
Krohn, W. B., and C. S. Loftin (compilers and editors). 2003. Maine Cooperative Fish and Wildlife Unit and Department of Wildlife Ecology - 2002 Report to Cooperators. Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono, ME. 52 pp.	January 2003
Krohn, W. B., and C. S. Loftin (compilers and editors). 2007. Maine Cooperative Fish and Wildlife Research Unit and Department of Wildlife Ecology. 2006 Report to Cooperators. Maine Cooperative Fish and Wildlife Research Unit, University of Maine, Orono. 43 pp.	January 2007
Krohn, W. B., R. L. Dressler, and G. M. Stadler. 2002. Successful integration of GAP databases into town planning: the Maine Experience. Gap Analysis Bulletin 11:48-50.	September 2003
Krohn, W. B., R. B. Boone, S. A. Sader, J. A. Hepenstall, S. M. Schaefer, and S. L. Painton. 2000 (1998). Maine Gap Analysis - a geographic analysis of biodiversity. Two CDs published by the USGS Biological Resources Division, Gap Analysis Program, Moscow, ID. (CDs being sold by the Maine Department of Inland Fisheries and Wildlife, Augusta, Maine).	January 2000
Jackson, C. and Zydlewski, J. (2007) Summer movements of sub-adult brook trout, landlocked Atlantic salmon and smallmouth bass in the Rapid River, Maine	September 2007
Homyack, J., D. J. Harrison, and W. B. Krohn. 2001. Effect of precommercial thinning on selected wildlife species with special emphasis on snowshoe hare. Pages 41-43 IN Cooperative Forestry Unit 2000 Annual Report, Maine Agricultural and Forest Experiment Station Miscellaneous Report 424, University of Maine, Orono.	September 2001
Homyack, J. A., D. J. Harrison, and W. B. Krohn. 2003. Final results from studies on the effects of precommercial thinning on snowshoe hares and small mammals in northern Maine. IN 2003 Maine Cooperative Forestry Research Unit Annual Report, Maine Agricultural and Forest Experiment Station, Miscellaneous Report, University of Maine, Orono, ME.	May 2003
Homyack, J. A., D. J. Harrison, and W. B. Krohn. 2003. Effects of precommercial thinning on selected wildlife species with special emphsis on snowshoe hare. IN 2002 Cooperative Forest Unit Annual Report. Maine Agricultural and Forest Experiment Station, Miscellaneous Report, University of Maine, Orono, ME.	December 2002
Homyack, J. A., D. J. Harrison, and W. B. Krohn. 2002. Effect of precommercial thinning on selected wildlife species with special emphasis on snowshoe hare. Pages 49-53 IN 2001 Cooperative Forestry Unit Annual Report. Maine Agricultural and Forest Experiment Station, Miscellaneous Report 428, University of Maine, Orono.	August 2002
Holbrook, C., Zydlewski, J., Kinnison, M. (2007) Migration of Adult Atlantic salmon. Final Report to the West Enfield Fund.	January 2007
Holbrook, C., Zydlewski, J., Kinnison, M. (2006) Migration of Penobscot River Salmon Smolts: Ultrasonic Telemetry Studies. Final Report to the National Fish and Wildlife Foundation.	December 2006
Holbrook, C., Zydlewski, J., Kinnison, M. (2006) Migration of Adult Atlantic salmon. Final Report to the West Enfield Fund.	December 2006
Holbrook, C., Zydlewski, J., Kinnison, M. (2005) Assessment of downstream smolt passage in the Penobscot River. U.S. Atlantic Salmon Assessment Committee Report, 2005.	July 2005
Harrison, D., W. Krohn, and L. Robinson. 2007. Temporal and Spatial Relationships Among Hares, Lynx and Habitat. 2007 Annual Report of the Maine Cooperative Forestry Research Unit (CFRU), University of Maine, Orono. (posted on the CFRU's web site).	July 2007
Harrison, D. J., A. K. Fuller, J. A. Homyack, and W. B. Krohn. 2003. How do clearcutting, precommercial thinning, and partial harvesting influence wildlife habitats Page 10 IN Managing for Fiber Prodcution, Wildlife Habitat, and Biodiversity: Latest Results from the Maine Cooperative Forestry Research Unit (CFRU) Research. CFRU PR 03-01, University of Maine, Orono, ME.	March 2004
Carey, R. and J. Zydlewski. 2024. The Maine Cooperative Fish and Wildlife Research Unit and University of Maine Department of Wildlife Ecology 2023 Annual Report to Cooperators. 70 pp.	September 2024
Carey, R. and J. Zydlewski. 2024. The Maine Cooperative Fish and Wildlife Research Unit and University of Maine Department of Wildlife Ecology 2022 Report to Cooperators. 80 pp.	July 2024

Cooperative Fish and Wildlife Research Units Program: Maine
Education, Research and Technical Assistance for Managing Our Natural Resources

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Cooperative Fish and Wildlife Research Units Program: Maine Education, Research and Technical Assistance for Managing Our Natural Resources

Maine Research Activities

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Cooperative Fish and Wildlife Research Units Program: Maine
Education, Research and Technical Assistance for Managing Our Natural Resources