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z. Underwood, A. Walters, E. Gardunio, P. Gerrity, E. Mandeville, C. Saudners, and J. Skorupski. 2015. Comparison of Burbot Population Dynamics Across Adjacent Native and Invaded Ranges. AFS annual meeting, Portland, OR.
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August 2015
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Few comparisons have been made of population demographics or fish habitat relationships between native and invasive populations. Insight into what is driving population dynamics of burbot within their native and introduced range could help inform management - both control in the introduced range and conservation in the native range.
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Zachary Underwood, Elizabeth Mandeville, Annika Walters, Joe Deromedi, Paul Gerrity, Mike Mazur, and Kevin Johnson. 2015. The effects of water development on the genetic structure of burbot in the upper Wind River Basin, Wyoming. CO/WY American Fisheries Society Annual Meeting. Fort Collins, CO.
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February 2015
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Burbot are a native species of management concern and an important game fish. This study examines the genetic structure of populations within the Wind River Drainage which will aid fisheries managers in their conservation of this important species.
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Z. Underwood, E. Mandevills, A. Walters, J. Deromedi, P. Gerrity, and K. Johnson. The Effects of Water Development on the Population Connectivity of Burbot in the Upper Wind River Basin, Wyoming. AFS Annual Meeting, Portland, OR.
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August 2015
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Regional declines in abundance of burbot have been observed, spurring increased conservation efforts. Our findings will aid fisheries managers in the conservation of burbot within this region, and within other regions affected by water development.
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Yandow, L.H., A.D. Chalfoun and D.F. Doak. 2011. What are the critical habitat and climate elements for the American pika (Ochotona princeps) in the face of climate change? 18th Annual Meeting, The Wildlife Society, Waikoloa, Hawaii, 5-10 November 2011.
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November 2011
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Yandow, L.H., A.D. Chalfoun and D.F. Doak. 2011. Delineating limiting habitat features as potential climate proxies for the American pika (Ochotona princeps). Annual Meeting, The Wyoming Chapter of the Wildlife Society, Jackson, Wyoming, 6-9 December 2011.
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December 2011
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Wyckoff, T.B., M.J. Kauffman and S.E. Albeke. 2011. Evaluating the influence of development on ungulate migrations. 18th Annual Meeting, The Wildlife Society, Waikoloa, Hawaii, 5-10 November 2011.
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November 2011
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Wyckoff, T.B., M.J. Kauffman and S.E. Albeke. 2011. Evaluating the Influence of Development on Ungulate Migrations. Annual Meeting, The Wyoming Chapter of The Wildlife Society, Jackson, Wyoming, 6-9 December 2011.
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December 2011
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Wyckoff, T., M. Kauffman, S. Albeke, and H. Sawyer. 2014. EVALUATING THE INFLUENCE OF DEVELOPMENT ON MULE DEER MIGRATIONS
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August 2014
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Energy development is expanding across the West with unknown consequences for migratory ungulates. This study evaluates how the behavior of migrating mule deer is influenced by human development occurring within their migration routes.
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William Rosenthal, John Fennell, Elizabeth Mandeville, Jason Burckhardt, Annika Walters, and Catherine Wagner. 2023. Hybridization decreases native Cutthroat Trout reproductive fitness. Coastwide Salmonid Genetics Meeting
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June 2023
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Examining the action of natural selection in wild populations presents many challenges, but also sheds light on important ecological and evolutionary processes. We characterized several components of relative fitness in hybridizing populations of Yellowstone Cutthroat Trout and Rainbow Trout in an effort to better understand the prolonged persistence of both parental species despite predictions of extirpation.
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William Rosenthal, Ashleigh Pilkerton, Elizabeth Mandeville, Joe Skorupski, Paul Gerrity, Annika Walters and Catherine Wagner. 2020. Sauger Population Structure and Hybridization with Introduced Walleye. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2020.
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February 2020
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Sauger <i>Sander canadensis</i> are a species of greatest conservation need in Wyoming due to habitat fragmentation, competition with non-native fish, and the potential loss of genetic integrity through co-occurrence and hybridization with Walleye <i>Sander vitreus</i>. Understanding the underlying mechanisms of hybridization between these species is pertinent for the conservation of native Sauger populations
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William Rosenthal, Annika Walters, and Catherine Wagner. 2023. Evaluating the evolutionary effects of fish stocking in an imperiled trout. Annual Meeting of the American Fisheries Society.
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August 2023
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Fish stocking practices include supplementing wild populations of native fish species for recreational or conservation purposes. The effects and impacts of this supplementation on population conservation status and evolution are not well understood, and could have significant consequences on population adaptive potential in the face of climate change.
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William Rosenthal W., J. Fennell, A. Walters, and C. Wagner. 2020. Evaluating Causes of Reproductive Isolation in Hybridizing Trout. American Fisheries Society virtual annual meeting.
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September 2020
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Hybridization with introduced Rainbow Trout (<i>Oncorhynchus mykiss</i>) is a substantial threat to genetically pure populations of Yellowstone Cutthroat Trout (<i>O. clarkii bouvieri</i>). Our results will aid Yellowstone Cutthroat Trout conservation by identifying how the impacts of hybridization with Rainbow Trout might be mitigated.
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Wilhite, J., W. Hubert, and M. Smith. Spatial distributions and habitat associations of warmwater fishes in the Bighorn River, Wyoming. Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming, March 8, 1006.
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March 2006
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Wilhite, J. W., and W. A. Hubert. Channel changes in the Bighorn River of Wyoming since construction of Boysen Dam: Implications for native fishes. Annual Meeting, American Fisheries Society, San Francisco, California, September 6, 2007.
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September 2007
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Wilhite, J. W., W. A. Hubert, and E. J. Rodemaker. Channel changes in the Bighorn River of Wyoming since regulation by Boysen Dam: Implications for native fishes. Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Ft. Collins, Colorado, February 28, 2007.
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February 2007
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Wilhite, J. W. Hubert, and M. Smith. Spatial distributions and habitat associations of warmwater fishes in the Bighorn River, Wyoming. Annual Meeting, Western Division, American Fisheries Society, Bozeman, Montana, May 18, 2006.
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May 2006
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Whittle, E., I. Abernethy, and A. D. Chalfoun. 2019. Maternity roost site selection by northern long-eared bats in the Black Hills of Wyoming. Wyoming Chapter of The Wildlife Society Annual Meeting, Sheridan, WY.
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November 2019
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Bat populations in North America are in decline due to habitat loss and degradation, interactions with wind turbines, and emerging disease. We tracked pregnant and lactating female northern long-eared bats (a threatened species) back to day roosts in the Black Hills National Forest to identify key attributes of maternal roost sites for managers.
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Whittle, E., I. Abernethy, and A. Chalfoun. 2022. Evidence of context-dependent habitat selection by northern long-eared bats. Wyoming Chapter of The Wildlife Society annual meeting, Jackson, WY.
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April 2022
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The threatened northern long-eared bat faces stressors range-wide associated with habitat change and disease. Our objectives were to 1) characterize maternity roosts of northern long-eared bats in the Black Hills, and 2) assess whether roost preferences are influenced by weather conditions and reproductive status.
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Webster, M., G. Barrile, A. Walters, and A. Chalfoun. 2020. ‘Dude! Where’s my pond?!' Evaluating the role of beaver activity in pond persistence over time. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2020.
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February 2020
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Beaver fundamentally modify stream morphology and hydrology by creating ponds and wetlands that serve as critical breeding habitat for a plethora of species. Over time, as fluctuations in pond quality and loss of pond habitat occurs, population persistence for species reliant on such habitat is dependent on the creation of new beaver ponds.
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Walters, A.W., and C. Girard. 2013. The effects of energy development on habitat quality and fish communities in southwestern Wyoming. Society for Freshwater Science annual meeting.
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May 2013
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This research addresses an important knowledge gap: the effects of energy development on fish communities. There is substantial interest in this topic as evidenced by the fact that this is an invited presentation for a symposium.
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Walters, A.W., Z. Hooley-Underwood, and E.G. Mandeville. 2018. Evaluating the influence of dams and diversions on Burbot movement in the Wind River Drainage, Wyoming using genetic, isotopic, and field data. Western Division of American Fisheries Society, Anchorage, Alaska.
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May 2018
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Burbot (Lota lota) populations are declining with dams and water diversions thought to be a major threat. This research used a multi-scale approach to increase our inferential abilities and mechanistic understanding of Burbot movement patterns between natural and managed systems.
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Walters, A.W., T. Copeland, and D.A. Venditti. The density dilemma: limitations on juvenile production in threatened salmon populations. Western Division American Fisheries Society Meeting. Boise, Idaho.
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April 2013
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Addresses an important issue, density dependence, in a threatened fish population.
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Walters, A.W., M.A.G. Sagrario, and D. Schindler. 2012. “When is spring green-up? Interaction of species phenology and community composition” Ecological Society of America annual meeting, Portland, OR.
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August 2012
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Walters, A.W., K.K. Bartz, and M.M.McClure. 2011. Analysis of instream flow issues and climate change impacts for juvenile salmon in the Lemhi River, Idaho. American Fisheries Society annual meeting, Seattle, WA.
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September 2011
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Walters, A.W., D. M. Holzer, J. R. Faulkner, C. D. Warren, P. D. Murphy, and M.M. McClure. 2012. “ Quantifying cumulative entrainment effects for Chinook salmon in a heavily irrigated watershed” American Fisheries Society Western Division meeting, Jackson, WY.
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March 2012
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Walters, A.W. and C. Girard. 2014. Differential vulnerability of fish to energy development. Joint Aquatic Sciences Meeting, Portland, OR.
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May 2014
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Energy development is increasing throughout the US and we do not understand the effect of this for native fish communities. This project addresses differential vulnerability of fish to energy development.
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Walters, A.W. and C. Girard. 2013. Energy development, habitat quality, and native fish communities in southwestern Wyoming. American Fisheries Society annual meeting, Little Rock, AR, September 2013.
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September 2013
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Energy development is a pressing national concern. This study looks at the effects that surface disturbance associated with energy development may have for stream habitat quality and fish communities.
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Walters, A.W. 2016. The role of context dependency in understanding the effects of low flow events on fish. SFS annual meeting, Sacramento, CA.
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May 2016
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The natural hydrology of streams and rivers has been extensively altered. Awareness of these sources of context dependency that drive variation in fish response to low flow events can help managers interpret and explain data, predict vulnerability of fish communities, and prioritize appropriate management actions.
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Walters, A.W. 2016. The role of context dependency in understanding the effects of low flow events on fish. AFS annual meeting, Kansas City, MO.
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August 2016
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Low flow events are increasingly common. Awareness of the sources of context dependency can help managers interpret and explain data, predict vulnerability of fish communities, and prioritize appropriate management actions.
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Walters, A.W. 2012. “Fisheries research at the Wyoming cooperative research unit” Wyoming Game and Fish Habitat meeting, Laramie, WY.
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May 2012
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Walters, A.W. 2012 “Aquatic ecosystems and the bark beetle epidemic” Vertebrate responses to bark beetles symposium, Laramie, WY.
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May 2012
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Walters, A.W. 2011 Future of fisheries research at the Wyoming Cooperative Research Unit. Wyoming Game and Fish fish supervisors meeting, Lander, WY.
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November 2011
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Walters, A., R. Walker, and S. Alford. 2018. Evaluating the resiliency of fish populations to stochastic disturbances. WY-TWS and WLCI Joint Meeting, Laramie, WY.
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November 2018
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Stream ecosystems are subject to frequent natural and anthropogenic disturbance events including floods, droughts, contaminant spills, and riparian habitat loss. A better understanding of species’ ability to recolonize sites following disturbance will provide insight into the persistence of fish species in these streams which have been highly affected by disturbance events (e.g. oil and product water spills, low flow events, re-routing of stream channels, and road and pipeline building).
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Walters, A., N. Carr, K. Sherrill, and J. Wesner. What insight can the Wyoming Basin Rapid Ecoregional Assessment provide for fisheries and aquatic habitat management in Wyoming? CO/WY American Fisheries Society Meeting, Laramie, WY.
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March 2014
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The REAs are an important tool for managers to prioritize restoration and conservation efforts. This informational talk will provide managers with insight into how they might be able to use the products from the WY Basin REA.
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Walters, A. and Ciepiela, L. R. 2019. Fitness consequences of life-history variation in spawning migrations of two inland salmonids. Society for Freshwater Science Annual Meeting, Salt Lake City, Utah.
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May 2019
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Knowing where fish reside, their movement patterns, and the habitats associated with their growth and reproduction is fundamental to the successful conservation of desired species.
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Walters, A. and Ciepiela, L. R. 2019. Fitness consequences of life-history variation in spawning migrations of two inland salmonids. Joint American Fisheries Society and Wildlife Society Meeting.
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October 2019
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Knowing where fish reside, their movement patterns, and the habitats associated with their growth and reproduction is fundamental to the successful conservation of desired species.
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Walters, A. and C. Girard. 2015. The effects if oil and gas development for aquatic habitats. Wyoming Landscape Conservation Initiative/ The Wildlife Society Meeting, Lander WY.
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December 2015
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Improved understanding of the effects of oil and gas development on aquatic habitats will allow more explicit management and mitigation recommendations for the protection of these habitats and the communities that depend on them.
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Walters AW, Rosenthal WC, Fennell JM, Mandeville EG, and Wagner CE. 2023. Temporal segregation in spawn timing and increased reproductive fitness allow persistence of nonhybridised Yellowstone Cutthroat Trout. Advances in the Population Ecology of Stream-Dwelling Salmonids VI.
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May 2023
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Hybridisation with introduced taxa threatens the persistence of native salmonid species. Mechanistic studies of reproductive isolation provide insight into the variable hybridisation outcomes observed amongst salmonids and can help inform management of threatened salmonids.
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Walker, R.H., C.E. Girard, S.A. Alford, and A.W. Walters. 2019. Surface disturbance intensifies the effect of low flows on stream fishes. Society for Freshwater Science annual meeting.
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May 2019
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Development of flow-ecology relationships in a multiple-stressor framework can highlight management needs for stream fishes, and provides a better understanding of the mechanisms underlying flow-ecology relationships
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Walker, R.H. and Walters, A.W. 2018. It takes two to tango: interactive effects of hydrology and energy development on fish abundance. Colorado-Wyoming American Fisheries Society, Laramie, Wyoming.
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February 2018
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While most research has focused on single stressor effects, it is becoming increasingly apparent that many ecosystems are affected by multiple stressors, and their interactions can have varying effects on ecological change. This research assesses how hydrology and energy development interact to affect fish populations.
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Walker, R., and A. Walters. 2018. Mechanisms Underlying Ecological Responses to Surface Disturbance in Headwater Streams. WY-TWS and WLCI Joint Meeting, Laramie, WY.
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November 2018
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Anthropogenic surface disturbance (SD) can alter habitat, water quality, and food availability in freshwater ecosystems with repercussions for the distribution of species. Continued identification of the mechanistic pathways underlying patterns in consumer populations will aid managers in better understanding consumer-resource dynamics resulting from anthropogenic disturbances.
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Walker, R., C. Girard, and A. Walters. 2016. Does oil and natural gas development and hydrology interact to affect fish populations. SFS meeting, Sacramento, CA.
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May 2016
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Managers and ecologists are under increased pressure to understand how stressors, natural or anthropogenic, interact to affect environmental change. Oil and natural gas devopment and hydrological variability are two important stressors.
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Walker, R., C. Girard, and A. Walters. 2016. Does oil and natural gas development and hydrology interact to affect fish populations. CO/WY AFS meeting, Laramie, WY.
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March 2016
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Managers and ecologists are under increased pressure to understand how stressors, natural or anthropogenic, interact to affect environmental change. Oil and natural gas devopment and hydrological variability are two important stressors.
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Walker, R., C. Girard, and A. Walters. 2015. Does oil and natural gas development and hydrology interact to affect fish population dynamics? Wyoming Landscape Conservation Initiative/ The Wildlife Society Meeting, Lander WY.
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December 2015
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Managers and ecologists are under increased pressure to quantify and understand how stressors, natural or anthropogenic, interact to affect environmental and ecological change. The objective of this study is to examine the potential interaction between oil and natural gas development and natural annual variation in hydrology on fish population dynamics.
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Walker, R. and A. Walters. 2015. Population dynamics of three fishes in relation to energy development in headwater streams of the Wyoming Range. Society for Freshwater Science annual meeting, Milwaukee, WI.
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May 2015
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Our understanding of how oil and natural gas development can affect aquatic ecosystems is limited. A better understanding of how energy development and hydrology interact to affect fish population dynamics can help guide management of native fish species.
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Wagler, B., L. Sanders, and A. Chalfoun. 2017. Do reclaimed areas within natural gas fields augment deer mouse fitness and abundance? Wyoming Chapter of The Wildlife Society Annual Meeting, Jackson, WY, 5-7 December, 2017.
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December 2017
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Previous work in the lab revealed significantly higher nest predation rates for declining sagebrush songbirds near reclaimed areas in Wyoming natural gas fields. The main nest predators were deer mice and the current study investigated why mice may be more abundant near reclaimed areas.
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W. Rosenthal, J. Fennell, A. Walters, and C. Wagner. 2021 Fitness effects in hybridizing trout. American Fisheries Society Annual Meeting 2021.
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November 2021
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In hybridizing populations, natural selection may be an important determinant of the eventual outcome of hybridization. We characterized several components of relative fitness in hybridizing populations of Yellowstone cutthroat trout and rainbow trout in an effort to better understand the prolonged persistence of both parental species despite predictions of extirpation.
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Vartanian, J. M., and M. J. Kauffman. 2007. Evaluating the influence of bottom-up and top-down control of Shiras moose demography in the Jackson Herd Unit. Wyoming Game and Fish Moose Working Group Meeting (via video link). Wyoming. November 2007.
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November 2007
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Vartanian, J. M., and M. J. Kauffman. Evaluating landscape-level variation in habitat quality: Can moose correct for variation in habitat quality via diet selection. 17th Annual Conference, The Wildlife Society, Snowbird, Utah. 2-6 October 2010.
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October 2010
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Vartanian, J. M., and M. J. Kauffman. 2009. Habitat condition, diet, and nutrition quality of forage: Implications for a declining moose population. Annual meeting, The Wildlife Society, Wyoming Chapter, Cody, Wyoming, 3-5 November 2009.
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November 2009
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Vartanian, J. M., M. J. Kauffman, B.W. Hess, and S. A. Kilpatrick. Evaluating variation in seasonal habitat quality for a declining moose population in northwest Wyoming. The 46th Annual North American Moose Conference and Workshop. Jackson, Wyoming 5/2011
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May 2011
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Vartanian, J. M., M. J. Kauffman, B. W. Hess. 2011. Evaluating variation in seasonal habitat quality for a declning moose population in northwest Wyoming. 18th Annual Conference, The Wildlife Society, Waikoloa, Hawaii, 5-10 November 2011.
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November 2011
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Vartanian, J. M., M. J. Kauffman. 2010. Habitat condition, diet, and nutrition quality of forage: Implications for a declining moose population in Northwest Wyoming. 90th Annual Meeting, The American Society of Mammologists, Laramie, Wyoming, 11-15 June 2010.
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June 2010
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Underwood, Z.E., E.G. Mandeville, and A.W. Walters. The effects of water development on the genetic structure of North American bubot populations. International Congress on the Biology of Fish. Edinburgh, Scotland.
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August 2014
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Burbot are declining in the Wind/ Bighorn River system. One of the concerns is entrainment in irrigation canals and this project provides insight into that concern.
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Underwood, Z, and A. Walters. 2014. Burbot movement and entrainment pathways in the upper Wind River drainage CO/WY American Fisheries Society Meeting, Laramie, WY.
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March 2014
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Burbot are a native fish which is declining in abundance. This research addresses one potential reason for the decline - entrainment in irrigation canals.
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Tiemann, A. and Walters, A. 2022. Evaluating movement patterns of Roundtail Chub and Flannelmouth Sucker in the Blacks Fork Subdrainage. Colorado/Wyoming Chapter of the American Fisheries Society Annual Meeting, Laramie, Wyoming.
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March 2022
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Native fish populations have declined at an alarming rate due to anthropogenic changes to riverine habitat. Movement behaviour has rarely been documented in imperiled native fish populations. As movement is a key adaptive response to changing environments, understanding movement patterns is critical to conserving native fish.
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Tiemann, A. and Walters, A. 2021. Evaluating movement patterns of Roundtail Chub and Flannelmouth Sucker in the Blacks Fork Subdrainage. Colorado/Wyoming Chapter of the American Fisheries Society Annual Meeting, Laramie, Wyoming.
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February 2021
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Native fish populations have declined at an alarming rate due to anthropogenic changes to riverine habitat. Movement behaviour has rarely been documented in imperiled native fish populations. As movement is a key adaptive response to changing environments, understanding movement patterns is critical to conserving native fish.
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Tiemann, A. and Walters, A. 2021. Evaluating movement patterns of Roundtail Chub and Flannelmouth Sucker in the Blacks Fork Subbasin. Western Division of the American Fisheries Society Annual Meeting, Utah.
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May 2021
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Native fish populations have declined at an alarming rate due to anthropogenic changes to riverine habitat. Movement behaviour has rarely been documented in imperiled native fish populations. As movement is a key adaptive response to changing environments, understanding movement patterns is critical to conserving native fish.
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Tiemann, A. and Walters, A. 2020. Evaluating movement patterns of Roundtail Chub and Flannelmouth Sucker in the Blacks Fork Subdrainage. Colorado/Wyoming Chapter of the American Fisheries Society Annual Meeting, Laramie, Wyoming.
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February 2020
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Native fish populations have declined at an alarming rate due to anthropogenic changes to riverine habitat. Movement is a key adaptive response to changing environments, so understanding movement patterns is critical to conserving native fish.
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T Datry, D Allen, G Allen, A Burgin, M Busch, R Burrows, A DelVecchia, W Doods, M Fork, J Hammond, K Kaiser, C Little, M Messager, M Mims, E Moody, J olden, R Sarremejane, R Stubbington, J Tonkin, A Truchy, R Walker, A Walters, S Yu, S Zipper. 2022. Comparison of human-induced and naturally intermittent rivers: science, management, and policy implications.
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May 2022
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Here ,we explore whether human-induced and natural intermittence have different effects on biodiversity, ecological functions and ecosystem services in river networks and review the implications in terms of science, management and policy.
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Sweet, D., and W. Hubert. Movements and habitat associations of native and introduced catostomids in a tributary system of the Colorado River: implications for restoration of natives. 29th Annual Recover Program Researchers Meeting, Upper Colorado River Endangered Fish Recovery Program and the San Juan River Basin Recovery Implementation Program, Moab, Utah.
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January 2008
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Sweet, D., and W. Hubert. Movements and habitat associations of native and introduced catostomids in a tributary system of the Colorado River: Implications for restoration of the natives. Annual Meeting of the Colorado-Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming.
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March 2008
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Sweet, D., and W. Hubert. Movements and habitat associations of native and introduced catostomids in a tributary system of the Colorado River: Implications for restoration of natives. Annual Meeting of the Western Division, American Fisheries Society, Portland, Oregon.
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May 2008
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Sweet, D., and W. Hubert. Movement and habitat associations of native and introduced catostomids in the Big Sandy River of Wyoming. Annual meeting of the American Fisheries Society, Ottawa, Canada.
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August 2008
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Sweet, D., and W. Hubert. Age, grwoth, and length structure of native and introduced catostomids in two Colorado River headwater systems, Wyoming. Annual Meeting, American Fisheries Society, San Francisco, California, September 4, 2007.
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September 2007
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Sweet, D., and W. Hubert. Age, growth, and length structure of native and introduced catostomids in the Big Sandy and Little Sandy Rivers, Wyoming. Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Ft. Collins, Colorado, February 28, 2007
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February 2007
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Stewart, D., Z. Underwood, A. Walters, and F. Rahel. 2016. Are native fish management areas efficient conservation surrogates for amphibians, mussels, and reptiles? CO/WY AFS meeting, Laramie, WY.
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March 2016
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Native fish management areas are a new promising conservation tool.
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Smith, M., W. Hubert, and F. Barrows. The effect of diet composition on growth and reproductive efficiency of Yellowstone cutthroat trout broodfish.
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March 2003
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Smith, M. A., and W. A. Hubert. Effects of rapidly changing temperatures on the short-term survival of juvenile rainbow trout. Joint meeting of the Idaho and Bonneville chapters, American Fisheries Society, Pocatello, Idaho.
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March 2002
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Smith, M. A., and W. A. Hubert. 2002. Effects of rapidly changing temperatures on short-term survival of juvenile rainbow trout. Annual meeting Colorado-Wyoming Chapter, American Fisheries Society, Laramie, Wyoming.
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February 2002
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Smith, M. A. The effect of diet composition on growth and reproductive efficiency of Yellowstone cutthroat trout broodfish. Annual meeting, American Fisheries Society, Quebec, Canada.
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August 2003
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Simpkins, D., and W. Hubert. Factors affecting the overwinter survival of stocked rainbow trout and cutthroat trout in Wyoming tailwaters with recommendations for management and research. Joint meeting of the Colorado-Wyoming and Bonneville chapters, American Fisheries Society, Grand Junction, Colorado.
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March 2003
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Simpkins, D., W. Hubert, and C. Martinez del Rio. July 2000. Effects of starvation, water temperature and secondary stressors on the health and survival of juvenile rainbow trout. Western Division American Fisheries Society, Telluride, Colorado.
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July 2000
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Simpkins, D. G., and W. A. Hubert. Factors affecting the overwinter survival of stocked trout in Wyoming tailwaters with management and research recommendations. Annual meeting, American Fisheries Society, Quebec, Canada.
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August 2003
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Simpkins, D. G., W. A. Hubert, and C. Martinez del Rio. Factors affecting the condition and overwinter survival of juvenile trout in tailwaters: Are fish starving to death? Annual meeting of the Colorado-Wyoming Chapter, American Fisheries Society, Laramie, Wyoming.
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February 2002
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Simpkins, D. G., W. A. Hubert, and C. Martinez del Rio. Do condition indices reflect physiological status of fish? Annual Meeting, American Fisheries Society, Phoenix, Arizona.
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August 2001
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Simpkins, D. G., W. A. Hubert, and C. Martinez del Rio. Do body condition indices relect physiological helath of fish? Great Lakes Fish Commission Fish Health Workshop, Ann Arbor, Michigan.
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March 2001
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Simpkins, D. G., W. A. Hubert, and C. Martinez del Rio. Do body condition indices reflect physiological health of fish? Great Lakes Fish Commission Fish Health Workshop, Ann Arbor, Michigan.
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March 2001
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Simpkins, D. G., W. A. Hubert, and C. Martinez del Rio. Do body condition indices reflect physiological health of fish? Annual Meeting, Michigan Chapter, American Fisheries Society, Roscommon, Michigan.
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March 2001
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Simpkins, D. G., W. A. Hubert, and C. Martinez del Rio. August 2000. Effects of starvation, winter temperature and secondary stressors on the health and survival of juvenile rainbow trout. American Fisheries Society, St. Louis, Missouri.
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August 2000
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Simpkins, D. G., J. L. Hebdon, M. R. Dare, and W. A. Hubert. Factors influencing overwinter survival of juvenile trout in Wyoming tailwaters. Annual Meeting, Michigan Chapter, American Fisheries Society, Roscommon, Michigan.
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March 2001
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Shertzer, E., and A. Chalfoun. Sagebrush songbird demography across the full annual cycle and carryover effects of breeding habitat changes. Wyoming Chapter of The Wildlife Society annual meeting, Jackson, WY.
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April 2022
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Songbird research has focused historically on the breeding season, leaving large gaps in knowledge about potential limiting factors to population growth during other life stages.We aim to address these gaps in three declining songbird species that breed in North American sagebrush steppe; the Brewer’s sparrow (Spizella breweri), sagebrush sparrow (Artemisiospiza nevadensis), and sage thrasher (Oreoscoptes montanus) by tracking individuals across the full annual cycle.
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Senecal, A., and W. Hubert. Modeling habitat availability in a Great Plains river system to assess the effects of energy development-related flow augmentation. Annual Meeting, Western Division, American Fisheries Society, Albuquerque, New Mexico.
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May 2009
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Senecal, A., A. Walters, and W. Hubert. 2016. Reconciling the temporal scales of data collection and population-level change: the Powder River’s “native invaders”. CO/WY AFS meeting, Laramie, WY.
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March 2016
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Examining historical shifts in species assemblages can help us understand current and future threats.
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Senecal, A. C., and W. A. Hubert. Variation in physical habitat features and small fish assemblages during summer months in the Powder River, Wyoming: Preliminary findings. Annual Meeting of the Great Plains Fishery Workers Association, Sheridan, Wyoming.
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January 2008
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Senecal, A. C., and W. A. Hubert. How pristine is the fish community of the Powder River, the "last remnant" of the Great Plains river system? Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Fort Collins, Colorado.
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February 2009
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Scott, M., T. Wesche, and W. Hubert. Riverside life below dams: cottonwoods, flows and fish. Symposium, North Platte River Closeups, University of Wyoming Casper Center, Casper, Wyoming.
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October 2000
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Schwanke, C. J., and W. A. Hubert. Abundance and movements of the rainbow trout spawning population in the Naknek River, southwest Alaska. Annual meeting Colorado-Wyoming Chapter, American Fisheries Society, Laramie, Wyoming.
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February 2002
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Schwanke, C. J., and W. A. Hubert. Abundance and movements of the rainbow trout spawning population in the Naknek River, Southwest Alaska. Joint Meeting, Idaho and Bonneville chapters, American Fisheries Society, Pocatello, Idaho.
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March 2002
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Scherr, Tayler, and Anna Chalfoun. 2018. Taming the temperature: Do birds select nest sites that modulate microclimatic variation? American Ornithological Society Annual Meeting, Tucson, AZ.
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April 2018
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Nest site selection is a critical choice that can influence reproductive fitness outcomes. Whereas the role of predation risk in influencing nest site selection has been well explored, the extent to which birds select nest sites on the basis of microclimatic variation remains unclear.
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Scherr, T., and A. Chalfoun. 2017. The effects of multiple forms of habitat change on songbird nest site selection and reproductive success. Wyoming State Chapter of The Wildlife Society Annual Meeting, Jackson, WY, 5-7 December, 2017.
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December 2017
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We are investigating the additive and/or interactive effects of physical habitat change due to energy development and climatic variation on nesting decisions and success of three species of declining sagebrush songbirds.
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Scherr, T., and A. Chalfoun. 2018. Taming the temperature: Evaluating the extent to which sagebrush songbirds can buffer microclimate with nest site selection. WY-TWS Joint Meeting, Laramie, WY.
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November 2018
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Climatic regimes are changing at an unprecedented pace, and species inhabiting high-elevation, arid environments such as the sagebrush steppe are expected to experience some of the strongest effects. The extent to which wildlife can modulate key microclimates, such as those at reproductive sites, however, remains largely unknown.
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Scherr, T. M., and A. D. Chalfoun. 2019. Understanding the effects of nest-site temperature on songbird reproductive fitness and parental care. Annual meeting of the American Ornithological Society, Anchorage, AK.
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June 2019
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Weather patterns are changing at an unprecedented pace and may affect the fitness and behavior of birds individually, additively, or synergistically with other forms of environmental change. We investigated how temperature at the nest site affects reproductive fitness metrics and parental behavior of three sagebrush-obligate songbirds along a gradient of habitat loss associated with energy development in western Wyoming, USA.
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Sawyer, H.S., M.J. Kauffman, R. Nielson, and J. Horne. 2009. Identifying and prioritizing ungulate migration routes for landscape-level conservation. 2009 Wyoming Landscape Conservation Initiative Worshop, Laramie, Wyoming 12-14 May 2009.
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May 2009
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Sawyer, H.S., M.J. Kauffman, R. Nielson, and J. Horne. 2008. Identifying and prioritizing ungulate migration routes for conservation. Annual Meeting, The Wildlife Society, Wyoming Chapter, Sheridan, Wyoming, 19-21 November 2008.
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November 2008
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Sawyer, H.S., M.J. Kauffman, R. Nielson, and J. Horne. 2008. Identifying and prioritizing ungulate migration routes for conservation. 15th Annual Conference, Wildlife Society, Miami, Florida, 8-12 November 2008.
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November 2008
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Sandsers, L., A. Chalfoun, and M. Kenney. 2017. Sagebrush songbirds mitigate nest predation risk via parental care behaviors. Wyoming Chapter of The Wildlife Society Annual Meeting, Jackson, WY, 5-7 December, 2017.
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December 2017
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The extent to which nesting songbirds can reduce predation risk via parental care behaviors at the nest remains unclear. We examined attentiveness during the incubation and nestling stages for Brewer's sparrows and sage thrashers and the resulting nesting outcomes.
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Sanderson, T., and W. A. Hubert. Habitat diversity and access to tributaries are important to adult Snake River cutthroat trout residing in the Salt River, Wyoming. Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Ft. Collins, Colorado, February 28, 2007.
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February 2007
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Sanderson, T. B., and W. A. Hubert. Assessment of gaseous CO2 and Aqui-S as anesthetics for use when surgically implanting radio transmitters in trout. Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming, March 8, 2006.
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March 2006
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Sanders, Lindsey, and Anna Chalfoun. 2015. Mechanisms underlying increased songbird nest predation rates with natural gas development. WLCI and Wyoming TWS joint meeting, Lander, WY 1-3 December, 2015.
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December 2015
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This poster will present an update on our research focused on why natural gas fields may augment local rodent assemblages. Rodents are the main predators on nests of three declining sagebrush songbird species in western WY.
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Sanders, Lindsey and Anna Chalfoun. 2016. Is a mesopredator release underlying increased songbird nest predation near natural gas development? Annual Meeting of the Wyoming Chapter of The Wildlife Society, Cody, Wyoming.
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November 2016
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We investigated the mechanisms underlying increased songbird nest predation in natural gas fields in western Wyoming. Mesopredator release was rejected as an hypothesis.
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Sanders, Lindsey E., and Anna D. Chalfoun. 2017. What is sustaining higher nest predator abundance within natural gas fields? Joint Meeting of the American Ornithological Society and Society of Canadian Ornithologists, East Lansing, MI, USA.
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August 2017
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Understanding the mechanisms underlying the effects of human-induced habitat change on wildlife is key for effective conservation and management. We tested alternative hypotheses for increased avian nest predator abundance near natural gas fields in Wyoming, USA.
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Sanders, L., and A. Chalfoun. 2018. Sagebrush songbird responses to density and proximity of energy development. WY-TWS and WLCI Joint Meeting, Laramie, WY.
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November 2018
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In the western US, the majority of development is occurring within sagebrush dominated landscapes, which has generated concern for the Species of Greatest Conservation Need that rely on sagebrush habitats. Here, we aimed to determine the most influential component of energy development (well pads, roads, reclaimed areas, or open areas) for the nesting success of sagebrush-obligate songbirds.
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Sanders, L., and A. Chalfoun. 2017. What is sustaining higher nest predator abundance within natural gas fields? Wyoming Chapter of The Wildlife Society Annual Meeting, Jackson, WY, 5-7 December, 2017.
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December 2017
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We explore alternative hypotheses for why the most common nest predator of three species of declining songbirds increases in abundance within natural gas fields. Understanding mechanisms underlying altered predator-prey dynamics in anthropogenic environments is key for effective mitigation regimes
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Sanders, L. E., L. E. Hall, and A. D. Chalfoun. 2019. Warming temperatures lengthen breeding seasons, but lower productivity for a sagebrush-obligate songbird. Annual meeting of the American Ornithological Society, Anchorage, AK.
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June 2019
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Weather patterns are increasingly being altered by contemporary climate change, with temperate regions regularly experiencing more temperature extremes and storm events. Understanding of how avian species are affected by climatic changes under different contexts, however, is still in its infancy.
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Sam Sillen, William Fetzer, Annika Walters, Matt Ross, Lindsay Patterson, Michael Thomas, Sarah Collins. 2021. Harmful cyanobacterial bloom (HCB) dynamics in Wyoming reservoirs. Society of Freshwater Sciences Annual Meeting 2021.
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May 2021
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Harmful cyanobacterial blooms (HCBs) are a growing concern among resource managers due to detrimental effects to ecosystem function, recreation, and drinking water sources. This project will increase understanding of historical trends in HCBs and their drivers in Wyoming, helping to inform management actions that address their frequency and intensity.
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Sadler, I., L. Tronstad, A. Walters, and T. Koel. 2023. Do methods to suppress invasive lake trout alter Yellowstone Lake nutrient dynamics? Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2023.
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March 2023
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The introduction and spread of invasive species to ecosystems is a severe threat to native species, biodiversity, and ecosystem processes across aquatic ecosystems. Non-native fish introductions are likely the greatest cause of native species declines, and managers are seeking new ways to suppress these non-native species.
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Ruthven, J. and A. Walters. 2022. Getting a pulse on invasive Brook Stickleback in Wyoming: distribution, habitat drivers, and overlap with native fishes in the North Platte River drainage. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2022.
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March 2022
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A deeper understanding of Brook Stickleback’s distribution, habitat drivers, and overlap with native fishes will help guide more effective management of the species in Wyoming. Specifically, it will help managers direct funding and personnel resources to sites where management efforts would have the greatest positive effect, ultimately enhancing efforts to conserve populations of imperiled fishes.
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Ruthven, J. and A. Walters. 2021. Looking at the big picture: evaluating the landscape-level distributional drivers of Brook Stickleback in the North Platte River Drainage, Wyoming. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2021.
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February 2021
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Determining the landscape-level habitat drivers of Brook Stickleback will provide a deeper understanding necessary for informing future management strategies of the species in Wyoming. Further, it will provide managers with information necessary to protect and enhance native fish populations that may be threatened by Brook Stickleback.
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Ruthven, J. and A. Walters. 2020. Evaluating the effects of Brook Stickleback on native nongame fishes in the Bighorn and North Platte Drainages, Wyoming. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2020.
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February 2020
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Understanding how native nongame fishes are potentially affected by Brook Stickleback through the mechanisms of predation and competition will help to inform management strategies and preserve native fish diversity in Wyoming.
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Rosenthal W., Fennell, J., Walters, A., Wagner, C., Mandeville, E., and Burckhardt, J. 2019. Effects of hybridization on fitness in Oncorhynchus of the North Fork Shoshone River drainage. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting, Fort Collins, Colorado
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February 2019
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Hybridization between rainbow and cutthroat trout is a substantial and widespread threat to the maintenance of natural cutthroat trout genetic diversity. This work can provide managers with more information on how the outcome of rainbow trout and cutthroat trout hybridization may change depending on the genetic background of the populations in question.
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Rieger, E. and A. Walters. 2023. Understanding the Sensitivity of Prairie Fish to Stream Intermittency in Wyoming. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2023.
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March 2023
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Understanding how native prairie fish respond to stream intermittency and fragmentation will become critical in the face of climate change and human alteration. This study will help to understand what levels of stream intermittency different species can withstand and aid in future predictions of habitat availability.
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Richard Walker, Geoff D. Smith and Annika Walters. 2017. Physiological responses of fishes to stressors associated with oil and natural gas development. Western Division American Fisheries Society
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May 2017
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Stressors, like increased conductivity and temperature, threaten the homeostasis of individuals and may cause changes from the cellular up to the population level. Very little is known on the stress physiology of non-game fishes that dominate most North American freshwater assemblages.
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Richard Walker, Geoff D. Smith and Annika Walters. 2017. Physiological responses of fishes to stressors associated with oil and natural gas development. CO/WY AFS meeting.
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June 2017
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Stressors, like increased conductivity and temperature, threaten the homeostasis of individuals and may cause changes from the cellular up to the population level. Very little is known on the stress physiology of non-game fishes that dominate most North American freshwater assemblages.
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Richard Walker, Geoff D. Smith and Annika Walters. 2017. Physiological responses of fishes to stressors associated with oil and natural gas development. CO/WY AFS meeting.
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February 2017
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Stressors, like increased conductivity and temperature, threaten the homeostasis of individuals and may cause changes from the cellular up to the population level. Very little is known on the stress physiology of non-game fishes that dominate most North American freshwater assemblages.
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Rhiannon Jakopak, Embere Hall, Anna Chalfoun. 2015. Understanding the architecture of overwinter food caches in a montane mammal. Joint meeting of the WLCI and Wyoming TWS, Lander, WY, 1-3 December 2015.
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December 2015
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This is the first investigation of the structure of American pika haypiles, and potential factors influencing haypile attributes. Haypiles are critical for pika overwinter survival.
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Rhea, D. T., W. A. Hubert, R. S. Gangl, and R. A. Whaley. Effects of seasonal patterns of nearshore and offshore trout distributions on hydroacoustic density estimates. Annual Meeting of the Western Division of the American Fisheries Society, Salt Lake City, Utah.
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March 2004
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Rhea, A., and A. D. Chalfoun. 2019. An experimental evaluation of the effects of a synanthropic rodent on the nesting productivity of sagebrush songbirds. Wyoming Chapter of The Wildlife Society Annual Meeting, Sheridan, WY.
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November 2019
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Predation is the primary cause of nest failure for most songbird species, yet studies that experimentally manipulate predator populations to evaluate their relative effect on avian productivity are rare. We investigated whether the nest predation of sagebrush-obligate songbirds (Brewer's sparrow, Spizella breweri; sagebrush sparrow, Artemisiospiza nevadensis; sage thrasher, Oreoscoptes montanus) by deer mice is additive or compensatory, via a deer mouse removal experiment and concomitant nest s
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Rhea, A., and A. Chalfoun. 2018. An experimental evaluation of the effects of a synanthropic rodent on the nesting productivity of sagebrush songbirds. WY-TWS Joint Meeting, Laramie, WY.
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November 2018
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Predation is the primary cause of nest failure for most songbird species, yet studies that experimentally manipulate predator populations to evaluate their relative effect on avian productivity are rare. The results of our experiment will yield valuable insights on the aggregate effects of synanthropic predators on sensitive bird species, and whether removal of primary nest predators could be a viable management practice to increase the nesting productivity of sagebrush songbirds within energy
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Rediscovering Big Game Migrations
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April 2015
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This talk, for a public audience, describes our discovery of several different big game migrations and ecological aspects of their movements. This talk will also describe some of the most pressing challenges to the conservation of ungulate migration routes in Wyoming and some of the work being done to address them.
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R. Walker and A.W. Walters. 2015. Population dynamics of three fishes in relation to energy development in headwater streams of the Wyoming Range. CO/WY American Fisheries Society Meeting. Fort Collins, CO.
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February 2015
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Energy development is an important potential stressor for fish populations and can interact with other stressors such as drought. This study examines how energy development and hydrology can affect the population dynamics of three fish species.
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Quist, M.C., W. A. Hubert, and F. J. Rahel. Effects of impoundments on Physiochemical habitat and turbid-river cyprinids in the Missouri River drainage of Wyoming. Annual meeting, American Fisheries Society, Quebec, Canada.
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August 2003
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Quist, M., W. Hubert, and F. Rahel. Effects of impoundments on physio-chemical habitat and turbid-river cyprinids in the Missouri River drainage of Wyoming. Joint meeting of the Colorado-Wyoming and Bonneville chapters, American Fisheries Society, Grand Junction, Colorado.
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March 2003
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Quist, M., W. Hubert, and F. Rahel. Assessing the effects of habitat and nonnative species on native fishes using hierarchial faunal filters. Annual Meeting of the American Fisheries Sociery, Madison, Wisconsin.
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August 2004
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Quist, M. C., and W. A. Hubert. Management issues associated with plains streams in Wyoming: past, present, and future. Annual meeting, American Fisheries Society, Anchorage, Alaska.
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September 2005
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Quist, M. C., and W. A. Hubert. Ecological, social, and economic issues related to bioinvasive species and preservation of cutthroat trout in the western United States. Wild Trout VIII Symposium. Old Faithful Lodge, Yellowstone National Park.
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September 2004
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Quist, M. C., and W. A. Hubert. Bioinvasive salmonids and the preservation of cutthroat trout: ecological, social, and economic issues. Annual Meeting of the Western Division of the American Fisheries Society, Salt Lake City, Utah.
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March 2004
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Quist, M. C., and W. A. Hubert. A process-driven approach for assessing warmwater streams in Wyoming. Annual meeting, American Fisheries Society, Quebec, Canada.
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August 2003
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Quist, M. C., W. A. Hubert, and F. J. Rahel. Warmwater stream assessment in Wyoming: a process-driven approach. Annual Meeting of the Southern Division of the American Fisheries Society, Oklahoma City, Oklahoma.
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February 2004
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Quist, M. C., W. A. Hubert, and F. J. Rahel. Hierarchial faunal filters: An approach for assessing the effects of habitat and nonnative species on native fishes. Annual Meeting of the Colorado/Wyoming Chapter, American Fisheries Society, Ft. Collins, Colorado.
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March 2005
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Quist, M. C., W. A. Hubert, and F. J. Rahel. A process-driven approach for assessing warmwater streams in Wyoming. Joint meeting of the Colorado-Wyoming and Bonneville chapters, American Fisheries Society, Grand Junction, Colorado.
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March 2003
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Quist, M. C., W. A. Hubert, and F. J. Rahel. A process-driven approach for assessing warmwater streams in Wyoming. 64th Annual Midwest Fish and Wildlife Conference, Kansas City, Kansas.
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December 2003
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Quist, M. C., M. R. Bower, and W. A. Hubert. Summer food habits and trophic overlap of roundtail chub and creek chubs. Annual Meeting of the Colorado/Wyoming Chapter, American Fisheries Society, Ft. Collins, Colorado.
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March 2005
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Quist, M. C., M. R. Bower, and W. A. Hubert. Summer food habitas and trophic overlap of roundtail chub and creek chub. Annual meeting, American Fisheries Society, Anchorage, Alaska.
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September 2005
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Quist, M. C., K. G. Gerow, M. R. Bower, and W. A. Hubert. Sample size requirements for monitoring fishes in Muddy Creek, Upper Colorado River basin. Annual Meeting of the Colorado/Wyoming Chapter, American Fisheries Society, Ft. Collins, Colorado.
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March 2005
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Quist, M. C., F. J. Rahel, and W. A. Hubert. Hierarchial faunal filters: An approach for assessing the effects of habitat and nonnative fishes on native fishes. 64th Annual Midwest Fish and Wildlife Conference, Kansas City, Kansas.
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December 2003
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Pilkerton, A., T. Knowles, S. Sillen, W. Fetzer, A. Walters, S. Collins. 2023. Exploring Zooplankton Community Response To Harmful Algal Blooms In The Intermountain West, USA. Association for the Sciences of Limnology and Oceanography 2023.
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June 2023
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This research enhances our understanding of the effects of harmful algal blooms (HABs) on zooplankton community dynamics. Our work will help ecologists characterize the effects of HABs across multiple trophic levels and lake trophic states to better understand how environmental perturbations influence ecosystem services.
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Pilkerton, A., A. Walters, F.Rahel, and L. Patterson. 2020. Sediment and Fisheries: Quantify Impacts of Sediment Releases from Willwood Dam. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2020.
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February 2020
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Managing sediment accumulation behind dams is a critical challenge in Wyoming. This research will better our understanding of effective metrics for monitoring sediment releases from dams and mitigating downstream impacts on fisheries, biological systems and fluvial processes.
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Pilkerton, A., A. Walters, F. Rahel, and L. Patterson. 2023. Updating Newcombe and Jensen’s Quantitative Assessment of Risk and Impact between Suspended Sediment and Fish. CO/WY American Fisheries Society Meeting 2023.
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March 2023
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This research enhances our understanding of the effects of suspended sediment on fishes. We provide empirical equations to help managers assess the sensitivity of fishes to varying suspended sediment concentrations. Our work will help natural resource management agencies make informed decisions and set regulatory thresholds to help ensure the amount and timing of sediment releases are reflective of ecological requirements.
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Pilkerton, A., A. Walters, F. Rahel, and L. Patterson. 2022. Understanding the biological impacts of sediment flushing flows on spawning habitat: A case study of Willwood Dam, WY. Joint Aquatic Sciences Meeting 2022.
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May 2022
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This research enhances our understanding of effective metrics and real-time models for monitoring sediment releases from dams and mitigating downstream impacts on fisheries, biological systems and fluvial processes. It will equip managers and stakeholders with site-specific knowledge to best protect and maintain downstream fisheries and other aquatic life in the Shoshone River, while also allowing the Willwood Irrigation District to deliver water to its users.
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Pilkerton, A., A. Walters, F. Rahel, and L. Patterson. 2022. Understanding the biological impacts of sediment flushing flows on spawning habitat: A case study of Willwood Dam, WY. Co WY AFS Meeting 2022.
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March 2022
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This research enhances our understanding of effective metrics and real-time models for monitoring sediment releases from dams and mitigating downstream impacts on fisheries, biological systems and fluvial processes. It will equip managers and stakeholders with site-specific knowledge to best protect and maintain downstream fisheries and other aquatic life in the Shoshone River, while also allowing the Willwood Irrigation District to deliver water to its users.
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Pilkerton, A., A. Walters, F. Rahel, and L. Patterson. 2021. Modeling Surrogate Metrics for Fine Sediment Deposition Impacts in Suitable Salmonid Spawning Habitat. Society of Freshwater Sciences Annual Meeting 2021.
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May 2021
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This research enhances our understanding of effective metrics for monitoring sediment releases from dams and mitigating downstream impacts on fisheries, biological systems and fluvial processes. It will equip managers and stakeholders with site specific knowledge to best protect and maintain downstream fisheries and other aquatic life in the Shoshone River, while also allowing the Willwood Irrigation District to deliver water to its users.
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Pilkerton, A., A. Walters, F. Rahel, and L. Patterson. 2021. Modeling Surrogate Metrics for Fine Sediment Deposition Impacts in Suitable Salmonid Spawning Habitat, Willwood Dam, WY. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2021.
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February 2021
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This research enhances our understanding of effective metrics for monitoring sediment releases from dams and mitigating downstream impacts on fisheries, biological systems and fluvial processes. It will equip managers and stakeholders with site specific knowledge to best protect and maintain downstream fisheries and other aquatic life in the Shoshone River, while also allowing the Willwood Irrigation District to deliver water to its users.
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Peterson, C., F. Rahel, and A. Walters. 2016. Division of thermal communities in Wyoming streams into management clusters. CO/WY AFS meeting, Laramie, WY.
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March 2016
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Surface water thermal regimes are highly vulnerable to anthropogenic influence. As a result it is important to have good information to establish management standards in order to maintain thermal conditions suitable for aquatic life.
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Peterson, C., F. Rahel, and A. Walters. 2016. Division of Wyoming stream thermal communities into management clusters. ALSO annual meeting, Santa Fe, NM.
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June 2016
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Temperature is a significant determinant of aquatic community composition and having appropriate thermal guidelines is essential for effective management.
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Peterson, C., F. Rahel, and A. Walters. 2015. An evaluation of thermal criteria in Wyoming surface water quality standards. Society for Freshwater Science annual meeting, Milwaukee, WI.
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May 2015
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Temperature is an important driver of fish distribution. An improved understanding of Wyoming fish species’ thermal requirements will allow for better management of Wyoming surface waters.
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Peterson, C., F. Rahel, and A. Walters. 2015. An evaluation of thermal criteria in Wyoming surface water quality standards. CO/WY AFS meeting, Fort Collins, CO.
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February 2015
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Temperature is an important driver of fish distribution. An improved understanding of Wyoming fish species’ thermal requirements will allow for better management of Wyoming surface waters.
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Ortega, A.C., Burke, P. and Kauffman, M.J. 2017. Understanding the maintenance of
partial migration: a test of the fitness-balancing hypothesis with mule deer in
south-central Wyoming. TWS 24th Annual Conference, Albuquerque, NM.
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September 2017
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Many migratory species exhibit partial migration; however, the mechanisms driving partial migration have been unclear and understudied. Testing the fitness-balancing hypothesis in mule deer will be an important step in understanding the factors maintaining variability in migration behavior and will aid in future conservation and management efforts.
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Oates, B.A., J.R. Goheen, M.J. Kauffman, G.L. Fralich, and K.L. Monteith. 2014. COMPARATIVE DEMOGRAPHY OF TWO MOOSE POPULATIONS WITH CONTRASTING PREDATOR DENSITIES
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August 2014
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The influence of newly expanding wolves and grizzly bears on moose population performance is unclear. This study compares the demography of two adjacent moose herds that vary widely in their exposure to these large predators.
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Nuñez, T., M. Hurley, J. Fattebert, J. Merkle, A. Ortega, H. Sawyer, T. Graves, M. Kauffman. 2020. Predicting migration corridors: using maximum likelihood to fit corridor models to movement data. 27th Annual Conference of The Wildlife Society. Louisville, KY, Sept. 27 – Oct. 1, 2020
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September 2020
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Conserving migratory populations requires knowing the location and environmental drivers of migratory corridors. This work presents a new method that finds statistical relationships between corridor routes and their environmental drivers, and allows for their prediction.<br><br>
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Nuñez, T., M. Hurley, J. Fattebert, J. Merkle, A. Ortega, H. Sawyer, M. Kauffman. 2020. Predicting migration corridors: using maximum likelihood to fit corridor models to movement data. 2020 North America Congress for Conservation Biology. Denver, Colorado, July 26-31, 2020.
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July 2020
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This study developed a new method to predict the routes of migrating ungulates based on GPS collar data. The results will assist wildlife managers in conserving ungulate migration routes. <br>
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Newkirk, B., Walters A., and E. Larson. 2021. A survey of current distributions for Wyoming crayfishes. Colorado-Wyoming Chapter of The American Fisheries Society Annual Meeting 2021.
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February 2021
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Knowing the distribution of crayfish species is important as there are many crayfish species threatened with extinction worldwide. Our study discusses the current distribution of Wyoming crayfish populations and compares them to previous crayfish distribution studies in the state. These results document changes to Wyoming’s crayfish species distribution which may have management implications.
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Nelson, A., M.J. Kauffman, and M. Jimenez. 2008. Identifying the drivers of wolf-livestock conflicts in the Absaroka Mountains. Annual Meeting, The Wildlife Society, Wyoming Chapter, Sheridan, Wyoming, 19-21 Novermber 2008.
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November 2008
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Nelson, A. A., M. J. Kauffman, A. Middleton, D. McWhirter, M. Jimenez, K. Gerow. 2011. Spatial characteristics of wolf depredation sites in northwest Wyoming: a comparison between areas with migratory and resident elk. 18th Annual Conference, The Wildlife Society, Waikoloa, Hawaii, 5-10 November 2011.
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November 2011
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N. Clancy, D. Isaak, B. Maitland, P. Budy, and A. Walters. 2023. Thermal refuges for climate vulnerable fishes in Wyoming. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2023.
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March 2023
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Stream warming is greatly affecting a large number of fishes, but most studies have focused on economically-valuable, cold-water species. While many warmwater fishes are expected to fare better in response to stream warming, increasing in abundance and distribution, that does not preclude other members of the guild from declining when stream temperatures exceed their thermal tolerances.
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Mullner, S. A., W. A. Hubert, and T. A. Wesche. August 2000. Integrating a watershed-scale inventory for describing physical habitat and trout population information using geographic information system depiction. American Fisheries Society, St. Louis, Missouri.
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August 2000
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Mullner, S. A., W. A. Hubert, E. A. Felbeck, and T. A. Wesche. August 2000. Quantitative relations of roads and grazing to suspended sediments and salmonids spawning habitat quality in a fourth-order Rocky Mountain watershed. American Fisheries Society, St. Louis, Missouri.
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August 2000
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Morrison, T.A. and M.J. Kauffman. 2011. A quantitative evaluation of survey methods to model, monitor and manage mule deer populations. Annual Meeting, The Wyoming Chapter of The Wildlife Society, Jackson, Wyoming, 6-9 December 2011.
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December 2011
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Morrison, T., B. Lanka, M. Kauffman. 2012. Modeling harvested ungulate populations: Wyoming Game and Fish Department’s transition from POP-II to Colorado’s Spreadsheet model. Central Mountains and Plains Section of The Wildlife Society Meeting, Manan, North Dakota, 11-13 September 2012.
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September 2012
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Morrison, T. A., A. D. Middleton, M. J. Kauffman, D. McWhirter. 2012. Heading for a cliff: Can dramatic declines in elk recruitment alter age structure and future population performance? 97th Annual Meeting, Ecological Society of America, Portland, Oregon, 5-10 August 2012.
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August 2012
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Moore, M. M., Coulter, A. A., Golcher-Benavides, J., Rahel, F. J., Walters, A. W., Brewer, S. K., Wildhaber, M. L. 2024. A synthesis of the characteristics and drivers of introduced fishes in prairie streams: Can we manage harmful introduced fishes in these dynamic environments? Oral Presentation at the Midwest Fish and Wildlife Conference, Sioux Falls, South Dakota.
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January 2024
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In this paper we synthesize the state of knowledge of introduced fishes and their effects to fish communities in prairie streams, which have been historically overlooked ecosystems. This research can help guide future risk assessment, introduced fish suppression, and native fish conservation in prairie streams. This research is a product of the Prairie Fishes and Streams Collaborative Working Group, comprising scientists from multiple state, federal, and academic institutions.
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Monteith, K.L., S.A. Kilpatrick and M.J. Kauffman. 2011. Calf recruitment of Shiras moose in Wyoming: effects of climate? 46th North American Moose Conference and Workshop, Jackson, Wyoming, 23-16 May 2011.
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May 2011
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Monteith, K.L. and M.J. Kauffman. 2012. Calf recruitment of Shiras moose: effects of climate and plant phenology? 92nd Annual Meeting, American Society of Mammalogists, Reno, Nevada, 22-26 June 2012.
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June 2012
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Middleton, A.D., M.J. Kauffman, D.E. McWhirter, M.D. Jimenez, J.G. Cook, R.C. Cook, and A.A. Nelson. 2010. Do predators influence the condition and reproduction of their prey? Annual Meeting of the Wyoming Chapter of The Wildlife Society. Lander, WY, 16-19 November 2010.
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November 2010
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Middleton, A.D., M.J. Kauffman, D.E. McWhirter, J.G. Cook, R.C. Cook, A.A. Nelson, M.D. Jimenez, and R.W. Klaver. Large carnivore recovery and severe drought reduce the benefits of migration for a Yellowstone elk herd. Annual Meeting of the American Society of Mammalogists, Laramie, WY, 11-15 June 2010.
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June 2010
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Middleton, A.D., M.J. Kauffman, D.E. McWhirter, J.G. Cook, R.C. Cook, A.A. Nelson, M.D. Jimenez, and R.W. Klaver. Large carnivore recovery and long-term drought reduce the benefits of migration for a Yellowstone elk herd. Annual Meeting of the Ecological Society of America, Pittsburgh, PA, 1-6 August 2010.
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August 2010
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Middleton, A., M.J. Kauffman, D. McWhirter, and M. Jimenez. 2008. Absaroka elk ecology project: a research update. Annual Meeting, The Wildlife Society, Wyoming Chapter, Sheridan, Wyoming, 19-21 November 2008.
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November 2008
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Middleton, A., M. J. Kauffman, D. E. McWhirter, J. G. Cook, R. C. Cook, M. D. Jimenez, A. A. Nelson. 2011. Evaluating the nonconsumptive effects of predation among large mammals: Wolves and elk in Greater Yellowstone. 18th Annual Conference, The Wildlife Society, Waikoloa, Hawaii, 5-10 November 2011.
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November 2011
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Middleton, A. D., M. J. Kauffman, D. E. McWhirter, M. D. Jimenez, R. C. Cook, J. G. Cook, H. Sawyer, S. E. Albeke. 2012. Spatial and temporal context limit the effect of wolves on elk behavior and physiology. 97th Annual Meeting, Ecological Society of America, Portland, Oregon, 5-10 August, 2012.
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August 2012
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Michael Hague, Anna D. Chalfoun, Scott Sillett. 2015. Habitat use, predation risk, and resource availability: Fitness trade-offs in an island endemic. Joint WLCI and Wyoming TWS meeting, Lander, WY, 1-3 December 2015.
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December 2015
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The Island scrub-jay is an endangered species inhabiting the Channel Islands in CA. Understanding of the interactions between breeding habitat selection, predators, and resource availability is still in its infancy.
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Merkle, J.A., and Kauffman, M.J. 2017. Sustaining ungulate migrations: new tools to identify and conserve corridors across multiple-use landscapes. 24th Annual Conference of The Wildlife Society, Albuquerque, New Mexico.
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September 2017
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Recent research is highlighting the importance of migratory corridors as critical habitat for migratory ungulates, yet the vast landscapes that these animals require make conserving and managing migration difficult. In this talk, we 1) describe the foraging benefits of migration, 2) outline how to categorize and map migration corridors so they are useful to managers, and 3) describe how migration corridors have been integrated into Wyoming’s vital habitat designation program.
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Merkle, J.A., Sawyer, H., and Kauffman, M.J. 2017. Memory shapes mammalian migration and its benefits. Gordon Research Conference: Movement Ecology of Animals, March 2017, Ventura, CA.
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March 2017
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Many people have pondered how migrating large animals can successfully travel hundreds of kilometers to the same distant seasonal ranges year after year. Our study provides strong evidence that memory is the template by which these animals carry out such remarkable journeys and the basis by which they enhance the quality of their migration routes.
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McMartin, D., A. Pilkerton, A. Walters, and S. M. Collins. 2023. What’s for dinner? Understanding small-bodied fish isotopic niche variability with respect to fish sex and length. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2023.
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March 2023
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Quantifying isotopic niches variation among small bodied fish communities will provide a better understanding of resource and habitat use with respect to life history stage, sex and fish length. This work has important implications for understanding fish resource and habitat use in small reservoirs in Wyoming and can help inform the development of management strategies to protect habitat and resources important for species of greatest conservation need.
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McDonald, D. B., M. Bower, W. Hubert, and F. Rahel. Genetic bridges between introduced and native suckers in Wyoming. Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming, March 7, 2006.
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March 2006
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Mathis L. Messager, Julian D. Olden, Jonathan Tonkin, Rachel Stubbington, Jane S. Rogosch, Michelle H. Busch, Chelsea J. Little, Annika W. Walters, Carla L. Atkinson, Margaret Shanafield, Songyan Yu, Kate Boersma, Dave Lytle, Richard H. Walker, Ryan M. Burrows, Thibault Datry. 2023. A metasystem approach to designing environmental flows. Symposium for European Freshwater Science.
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June 2023
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Accelerating the design and implementation of environmental flows (e-flows) is essential to curb the rapid, ongoing loss of freshwater biodiversity and the benefits it provides to people. Our recommendations are relevant to diverse regulatory contexts and can improve e-flow outcomes even in basins with limited in situ data.
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Mandeville, EG, AW Walters, and CE Wagner, 2019. Fine-scale genetic patterns in Yellowstone cutthroat x rainbow trout hybrids in the North Fork Shoshone River, Wyoming. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2019.
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February 2019
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Hybridization represents a porosity of genetic boundaries between species, and we now know that hybridization dynamics can vary substantially across locations where a pair of species come into contact. Our results have implications for the fate of hybrid individuals, and in turn for the long-term effects of hybridization on native trout in Wyoming.
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Mandeville, E.G., C.E. Wagner, J.C. Burckhardt, and A.W. Walters. 2018. Variable hybridization outcomes in Yellowstone cutthroat x rainbow trout: genomic consequences and ecological correlates of hybridization. Colorado/Wyoming Meeting of the American Fisheries Society, Laramie, WY.
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February 2018
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Hybridization with non-native species can pose a threat to native fishes, but hybridization outcomes are difficult to predict. We quantified genomic outcomes of hybridization at 27 locations where native Yellowstone cutthroat trout come into contact with introduced rainbow trout, and investigated relationships between hybridization outcomes and environmental variables.
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Mandeville, E.G., A.W. Walters, J.C. Burckhardt, and C.E. Wagner. 2018. Genomic consequences and ecological correlates of variable hybridization outcomes in Yellowstone cutthroat x rainbow trout. Annual Evolution Meeting, Montepelier, France.
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August 2018
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When species hybridize following a species introduction or anthropogenic disturbance, hybridization becomes an important conservation concern. We quantified variation in hybridization among 27 streams where Yellowstone cutthroat trout come into contact with introduced rainbow trout in the North Fork Shoshone River basin (Wyoming, USA) using genomic data.
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Mandeville, E.G., A.W. Walters, B.J. Nordberg, J.C. Burckhardt, and C.E. Wagner. 2018. History of fish stocking drives variable hybridization outcomes in Yellowstone cutthroat x rainbow trout. Ecological Society of America. New Orleans, Lousiana.
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August 2018
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Hybridization with non-native species can pose a threat to native fishes, but hybridization outcomes are difficult to predict. We quantified genomic outcomes of hybridization at 27 locations where native Yellowstone cutthroat trout come into contact with introduced rainbow trout, and investigated relationships between hybridization outcomes and environmental variables.
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Mandeville, E., A. Walters, and C. Wagner. 2020. Locus-specific Introgression Reveals Hybridization Dynamics of Yellowstone Cutthroat Trout and Rainbow Trout. American Fisheries Society virtual annual meeting.
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September 2020
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We now know that hybridization dynamics can vary substantially across locations where a pair of related species come into contact. Our results suggest that ancestry skews more strongly towards rainbow trout in a number of genomic regions, and that unusual patterns of introgression might be associated with sex-determining regions of the genome.
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Mahoney, A., A. D. Chalfoun. 2011. Effects of Wind Energy Development on Nesting Grassland Birds. 18th Annual Conference, The Wildlife Society, Waikoloa, Hawaii, 5-10 November 2011.
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November 2011
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Macy Kenney, Lindsey Sanders, and Anna Chalfoun. 2016.
Persnickety parents: How parental care behavior affects songbird nest success. Annual Meeting of the Wyoming Chapter of The Wildlife Society.
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November 2016
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Parental care behavior of nesting birds can influence the probability of nest predation. We investigated whether the incubation rhythms of sage thrasher parents influenced nest predation rates.
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Liz Mandeville, Catherine E. Wagner, and Annika Walters. 2017. Hybridization between Yellowstone cutthroat trout and rainbow trout in the North Fork Shoshone river. CO/WY AFS meeting
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February 2017
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Native Yellowstone cutthroat trout and rainbow trout are known to hybridize, but the extent and spatial variability of hybridization has not yet been well characterized using genetic data, although morphological analyses suggest substantial hybridization and introgression.
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Lipsey, T. S. B., and W. A. Hubert. Predicting native fish distributions in the North Platte River drainage of Wyoming. Annual Meeting, Colorado/Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming.
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March 2001
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Lionberger, P., and W. Hubert. Longitudinal variation in the small fish assemblage in the Wind River watershed, Wyoming. Annual Meeting of the Colorado/Wyoming Chapter, American Fisheries Society, Ft. Collins, Colorado.
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March 2005
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Lionberger, P., and W. Hubert. Evidence of sauger movements from a reservoir nursery to a riverine habitat as adults based on otolith chemistry. Annual Meeting, American Fisheries Society, Lake Placid, New York, September 11, 2006.
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September 2006
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Lionberger, P. S., and W. A. Hubert. Longitudinal variation in small fish assemblages through the Wind River watershed and into Boysen Reservoir, Wyoming. Annual Meeting, Western Division, American Fisheries Society, Bozeman, Montana, May 17, 2006.
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May 2006
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Lionberger, P. S., and W. A. Hubert. Longitudinal variation in small fish assemblages through the Wind River watershed and into Boysen Reservoir, Wyoming. Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming, March 7-8, 2006
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March 2006
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Lionberger, P. S., W. A. Hubert, and R. Hannigan. Evidence of sauger movements from a reservoir nursery to a riverine habitat as adults based on otolith chemistry. Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming, March 8, 2006.
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March 2006
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Lindsy Ciepiela and Annika Walters. 2017. Estimating salmonid movement dynamics in the Upper North Platte River using otolith microchemistry. Western AFS meeting.
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May 2017
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As natural and anthropogenic disturbances increase in magnitude and frequency the ability of populations to rebound from disturbance will be critical to their overall success and longevity. Our research provides evidence that within-population diversity, particularly behavioral diversity related to movement and life history strategies, may be an important mechanism underlying resilient riverine fisheries.
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Lindsy Ciepiela and Annika Walters. 2017. Estimating salmonid movement dynamics in the Upper North Platte River using otolith microchemistry. CO/WY AFS meeting.
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February 2017
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As natural and anthropogenic disturbances increase in magnitude and frequency the ability of populations to rebound from disturbance will be critical to their overall success and longevity. Our research provides evidence that within-population diversity, particularly behavioral diversity related to movement and life history strategies, may be an important mechanism underlying resilient riverine fisheries.
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Lindstrom, J., and W. Hubert. Habitat selection and movements of adult cutthroat trout and brook trout from fall through winter in a low-gradient Rocky Mountain stream. Annual Meeting of the American Fisheries Society, Madison, Wisconsin.
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August 2004
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Lindstrom, J. W., and W. A. Hubert. Fall-through-winter habitat selection and movements of adult trout in a foothills stream. Annual Meeting of the Western Division of the American Fisheries Society, Salt Lake City, Utah.
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March 2004
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LeCheminant, A. and A. Walters. 2016. Movement dynamics and survival of hatchery-reared Colorado River cutthroat trout post-stocking. CO/WY AFS meeting, Laramie, WY.
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March 2016
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Colorado River cutthroat trout have experienced significant declines. An understanding of what is driving lack of establishment is important for conservation efforts.
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Layfield, J., A. Chalfoun, B. Bedrosian, and J. Merkle. Habitat selection and space use of migratory golden eagles in Wyoming during winter. Wyoming Chapter of The Wildlife Society annual meeting, Jackson, WY.
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April 2022
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Wyoming is home to some of largest concentrations of wintering golden eagles and wind energy potential in the country. With global energy demands and new development on the rise, understanding the extent to which migratory golden eagles use risky landscape elements, including energy-associated infrastructure, powerlines, and major roads, is critical and timely.
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Laske, S., F. Rahel, and W. Hubert. habitat use and overlap of roundtail chub and lake trout in two glacial lakes, Wyoming. Annual Meeting, Western Division, American Fisheries Society, Albuquerque, New Mexico.
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May 2009
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Laske, S., F. Rahel, and W. Hubert. Habitat use of roundtail chub and interactions with lake trout in two glacial lakes near Pinedale, Wyoming. Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Fort Collins, Colorado.
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February 2009
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Kuhn, K., and W. Hubert. Seasonal movements and habitat use by adult saugers in the Little Wind River drainage, Wyoming. Annual Meeting, American Fisheries Society, Lake Placid, New York, September 11, 2006.
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September 2006
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Kuhn, K. M., and W. A. Hubert. Fall through winter movements and habitat associations of adult sauger in the Wind River drainage, Wyoming. Annual Meeting of the Colorado/Wyoming hapter, American Fisheries Society, Ft. Collins, Colorado.
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March 2005
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Kuhn, K. M., W. A. Hubert, K. Johnson, D. Oberlie, and D. Dufek. Seasonal movements and habitat use of adult saugers in the Little Wind River drainage, Wyoming. Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming, March 8, 2006.
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March 2006
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Krist, A., K. Wagner, and A. Walters. 2018. Using ecological stoichiometry and fish presence to predict the zooplankton community structure in Wyoming alpine lakes. Society for Freshwater Science, Detroit, MI.
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May 2018
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Biodiversity is controlled by both biotic and abiotic factors, and the balance and number of these controls remains a key question in understanding ecological community assembly. We are using this natural and human-caused “experiment” to study the top-down and bottom-up controls on ecological community assembly in alpine lake ecosystems.
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Kramer, G., A. D. Chalfoun. 2011. Nestling Growth Rates and Nest Movements of Common Nighthawks in Grand Teton National Park. 18th Annual Conference, The Wildlife Society, Waikoloa, Hawaii, 5-10 November 2011.
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November 2011
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Korfanta, N.M., M.J. Kauffman, and D.B. McDonald. Demography and conservation of understory bird communities in a highly fragmented Afromontane forest. Cheyenne Audubon Society, Cheyenne, Wyoming.
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April 2008
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Kilpatrick, S., M. Zornes, D. Brimeyer, G. Fralick, and M.J. Kauffman. 2009. Regional decline of Wyoming moose populations: a statewide synthesis of trend counts, calf production, harvest, and climate drivers. 44th Annual Conference and Workshop, North American Moose Conference, Pocatello, Idaho, 14-17 June 2009.
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June 2009
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Keinath, D., and M.J. Kauffman. Assessment of Wildlife Vulnerability to Energy Development. Wyoming Landscape Conservation Initiative Comprehensive Assessment Workshop, Fort Collins, Colorado.
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March 2008
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Kauffman, M.K., 2011. Moose migrations track phenology on summer range: implications for trophic mismatch. 46th Annual Meeting, North American Moose Conference and Workshop, Jackson, WY, 23-26 May 2011.
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May 2011
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Kauffman, M. J., J. F. Brodie. 2011. Foraging under predation risk: Influence of landscape and seasonality mediate foraging by Yellowstone elk. 18th Annual Conference, The Wildlife Society, Waikoloa, Hawaii, 5-10 November 2011.
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November 2011
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Kauffman, M. J., 2006. Foraging and its influence on plant populations are not controlled by predation risk gradients in a large mammal predator-prey system. 91st Annual Meeting, Ecological Society of America, Memphis, Tennessee, 6-11 August 2006.
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August 2006
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Kauffman, M. J. 2012. Moose migrations track summer range phenology: Implications for trophic mismatch. 97th Annual Meeting, Ecological Society of America, Portland, Oregon, 5-10 August 2012.
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August 2012
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Kauffman et al. A COLLABORATIVE EFFORT TO MAP UNGULATE MIGRATIONS AND ADVANCE THEIR CONSERVATION ACROSS THE WESTERN UNITED STATES
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November 2022
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This presentation will describe work and progress of the Corridor Mapping Team, which we established to conduct ungulate corridor mapping with western states as called for under Secretarial Order 3362.
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Joyce, M. P., and W. A. Hubert. Determination of factors affecting natural recruitment of Snake River cutthroat trout in spring streams tributary to the Salt River. Annual Meeting, Colorado/Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming.
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March 2001
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Joseph Ceradini and Anna Chalfoun. 2015. Using species' traits to predict small mammal responses to habitat alteration by invasive plants. Joint WLCI and Wyoming TWS meeting, Lander, WY, 1-3 December, 2015.
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December 2015
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Non-native grass invasion is a conservation challenge in western North America, and can influence wildlife communities. Our work thoroughly examines the relationship between extent of cheatgrass invasion on small mammal communities.
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Jordan Von Eggers, Amy Krist, Catherine Wagner, Annika Walters, Bryan Shuman. 2020. Using eDNA in lake sediment cores to study fish introduction and environmental stressors on alpine lakes in Wyoming. AGU Fall Meeting (virtual)
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December 2020
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<b>Despite their remote nature, alpine ecosystems are particularly susceptible to nutrient deposition and invasion. This work highlights the potential to use a multi-proxy approach (DNA in sediment cores) to evaluate how a diverse set of human activities transformed even remote wilderness areas.</b>
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Jones, J.D., M.J. Kauffman, B. Surlock, R.C. Cook and J.G. Cook. 2011. Influence of winter supplemental feeding on summer foraging behavior of elk in western Wyoming. 18th Annual Meeting, The Wildlife Society, Waikoloa, Hawaii, 5-10 November 2011.
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November 2011
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Jones, J.D. and M.J. Kauffman. 2011. Influence of winter supplemental feeding on summer foraging behavior of elk (Cervus elaphus) in west-central Wyoming. Annual Meeting, The Wyoming Chapter of The Wildlife Society, Jackson, Wyoming, 6-9 December 2011.
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December 2011
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Jones, J.D. and M.J. Kauffman. 2011. Influence of nutritional condition on migration, habitat selection and foraging ecology of elk in western Wyoming. Meeting of the University of Wyoming Student Chapter of The Wildlife Society, Laramie, Wyoming, 3 March 2011.
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March 2011
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Jones, J.D. and M.J. Kauffman. 2010. Influence of winter supplemental feeding on elk ecology in the southern brucellosis endemic area of Wyoming. The Wyoming State Leadership Team Meeting of the Rocky Mountain Elk Foundation, Casper, Wyoming, 21 January 2012.
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January 2012
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Jones, J.D. and M.J. Kauffman. 2010. Influence of nutritional condition on migration, habitat selection and foraging ecology of elk in western Wyoming. 17th Annual Meeting, The Wildlife Society, Snowbird, Utah, 2-6 October 2010.
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October 2010
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Jones, J., M.J. Kauffman, B. Scurlock and P.C. Cross. 2012. Influence of winter supplemental feeding on elk migration in west-central Wyoming. 19th Annual Meeting, The Wildlife Society, Portland, Oregon, 13-18 October 2012.
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October 2012
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Jones, J. D. and M. J. Kauffman. 2010. Influence of nutritional condition on migration, habitat selection and foraging ecology of elk in western Wyoming. Annual Meeting, The Wyoming Chapter of The Wildlife Society, Lander, Wyoming, 16-19 November 2010.
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November 2010
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Jones, D., and A. Chalfoun. 2022. Infection rates and effects of ectoparasites on declining sagebrush songbirds. Wyoming Chapter of The Wildlife Society annual meeting, Jackson, WY.
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April 2022
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The effects of blowfly parasitism on nestling condition and fledgling survival of many songbirds, remains unknown. Moreover, understanding the environmental conditions leading to higher parasite prevalence will be important for risk assessments and potential mitigation strategies.
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Jesmer, B.R., Goheen, J.R., Monteith, K.L, and M.J. Kauffman. 2014. LINKING HABITAT AND NUTRITION WITH POPULATION PERFORMANCE IN MOOSE
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August 2014
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Moose populations have been declining across the Rocky Mountains and it has been unclear what role habitat condition plays. This study asks if moose calf production is a function of the level of browsing experienced by key forage plants.
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Jason D. Carlisle, Anna D. Chalfoun , Douglas A. Keinath Shannon E. Albeke. 2015. Do sage-grouse core areas protect non-game wildlife of concern? Joint WLCI and Wyoming TWS meeting, Lander, WY 1-3 December, 2015.
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December 2015
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This presentation will highlight the results of a comprehensive spatial analysis of the overlap of the greater sage-grouse core area strategy in Wyoming with the modeled suitable habitat for non-game sagebrush wildlife species of concern. The aim is to quantitatively assess which species and types of species are most protected by the umbrella of sage-grouse management.
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Jason Carlisle, Anna Chalfoun, Kurt Smith, Jeffrey Beck. 2016. The non-target effects of sage-grouse habitat treatments on sagebrush-associated songbirds. Annual Meeting of the Wyoming Chapter of The Wildlife Society, Cody, Wyoming.
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November 2016
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The greater sage-grouse is assumed to be an umbrella species for the conservation and management of co-occurring non-game wildlife species of concern, yet the effects of habitat treatments geared towards grouse on other species are unknown. We evaluated the effects of experimental sagebrush mowing and herbicide treatments on the abundance and nest success of co-occurring songbirds.
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Isaak, D., and W. Hubert. July 2000. Functioning of montane landscapes to produce stream habitats: hypothesis tests based on spatially explicit path analysis. Western Division American Fisheries Society, Telluride, Colorado.
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July 2000
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Isaak, D. J., and W. A. Hubert. August 2000. The role of GIS in exploratory spatial data analysis and the development of spatially explicit regression models. American Fisheries Society, St. Louis, Missouri.
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August 2000
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Hubert, W., and M. Quist. Ecosystem, social, and economic consequences of extirpations of cutthroat trout by invasive species in the Rocky Mountains: Implications for future conservation. Conference on Bioinvasions, University of Wyoming, Laramie, Wyoming, June5-6, 2003.
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June 2003
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Hubert, W., R. Compton, D. Banks, and D. Sweet. Management problems to be confronted in preservation of bluehead suckers and flannelmouth suckers in small, headwater streams in Wyoming. Annual Meeting, Colorado-Wyoming, Chapter, American Fisheries Society, Fort Collins, Colorado.
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February 2009
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Hubert, W., D. Banks, R. Compton, and D. Sweet. Management problems to be confronted in preservation of bluehead suckers and flannelmouth suckers in small, headwater streams in Wyoming. Annual Meeting, Western Division, American Fisheries Society, Albuquerque, New Mexico.
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May 2009
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Hubert, W. Cooperative Unit Update: Ongoing and recently completed fisheries research. Wyoming Game and Fish Department, Fish Division, Thermopolis, Wyoming.
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January 2003
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Hubert, W. Application of resource selection functions in fisheries science. First International Conference Resource Selection by Animals, Laramie, Wyoming.
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January 2003
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Hubert, W. A., and K. M. Gordon. Natural and anthropogenic factors contribute to declines of western Great Plains fishes. Annual Meeting of the Western Division of the American Fisheries Society, Salt Lake City, Utah.
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March 2004
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Hubert, W. A., R. I. Compton, M. R. Bower, M. C. Quist, F. R. Rahel, D. B. McDonald, and T. L. Parchman. A summary of 2002-2007 research on bluehead suckers, flannelmouth suckers, and roundtail chubs in upper Muddy Creek, Carbon County, Wyoming. 29th Annual Recovery Program Researchers Meeting, Upper Colorado River Endangered Fish Recovery Program and the San Juan River Basin Recovery Implementation Program, Moab, Utah
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January 2008
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Hubert, W. A., M. P. Joyce, R. Gipson, D. Zafft, D. Money, D. Hawk, and B. Taro. Whriling disease among Snake River cutthroat trout in two spring streams in Wyoming. 7th Annual Whirling Disease Symposium, Salt Lake City, Utah.
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February 2003
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Hubert, W. A., K. R. Gelwicks, D. Zafft, and R. Gipson. Synthesis of research and management issues regarding fine-spotted sutthroat trout in the Salt River drainage, Wyoming. Annual Meeting of the Western Division of the American Fisheries Society, Salt Lake City, Utah.
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March 2004
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Hubert, W. A., D. G. Simpkins, J. L. Hebdon, and M. R. Dare. April 2000. Factors influencing over-winter survival of juvenile trout in Wyoming tailwaters. Ecology and Management of Tailwaters in the United States, Lake Powell, Arizona.
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April 2000
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Hubert, W. A., D. Dufek, J. Deromedi, K. Johnson, S. Roth, and D. Skates. Burbot in the Wind River drainage of Wyoming. Annual meeting, American Fisheries Society, Anchorage, Alaska.
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September 2005
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Hubert, W. A. Changing paradigms for fisheries management: Implications for educators and managers. Joint meeting of the Idaho and Bonneville chapters, American Fisheries Society, Pocatello, Idaho.
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February 2002
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Hubert, W. A. Information gaps regarding aquatic resources and oil and gas development in the West. Responsible Energy Development Symposium, Jackson Lake Lodge, Grand Teton National Park, Wyoming.
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May 2008
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Hubert, W. A. Fisheries research on the Great Plains of Wyoming: A 25-year history of research by the Wyoming Cooperative Fish and Wildlife Research Unit. Annual Meeting of the Great Plains Fishery Workers Association, Sheridan, Wyoming.
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January 2008
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Hickerson, B., T. Robinson, and A. Walters. 2019. Evaluation of potential translocation sites for native fish: a case study. Arizona/New Mexico AFS meeting.
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February 2019
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Native fishes of the Western United States have generally experienced distributional declines over the last century and many species are in need of conservation efforts. Translocation of native fish to unoccupied habitat is one of the most commonly proposed conservation actions and is a foundational component of most species recovery plans.
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Hickerson, B. and Walters, A. 2017. Effects of non-native predatory fish on hornyhead chub in the Laramie River. Western Division of the American Fisheries Society Student Colloquium, McCall, Idaho.
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November 2017
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Hornyhead Chub are a species of greatest conservation need in Wyoming and a major threat to the persistence of Hornyhead Chub populations is the presence of non-native predatory fish (Brown Trout, Rainbow Trout, Brook Trout and Smallmouth Bass). This research assesses the effect of these predators.
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Hickerson, B. and A. Walters. 2018. Effects of non-native predatory fish on hornyhead chub in the Laramie River. Colorado Wyoming Chapter of the American Fisheries Society Annual Meeting, Laramie, Wyoming.
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February 2018
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Hornyhead Chub are a species of greatest conservation need in Wyoming and a major threat to the persistence of Hornyhead Chub populations is the presence of non-native predatory fish (Brown Trout, Rainbow Trout, Brook Trout and Smallmouth Bass). This research assesses the effect of these predators.
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Hickerson, B. and A. Walters. 2016. Locating Potential Reintroduction and Refugia Sites for Hornyhead Chub using GIS. CO/WY AFS meeting, Laramie, WY.
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March 2016
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Glacial relict Hornyhead Chub (Nocomis biguttatus) populations are greatly restricted in distribution so determining potential reintroduction and refugia sites is important.
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Heyward, J.E. and A.D. Chalfoun. 2011. An asssessment of spatiotemporal refugia for wildlife during the mountain pine beetle epidemic. Annual Meeting, The Wyoming Chapter of The Wildlife Society, Jackson, Wyoming, 6-9 December 2011.
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December 2011
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Heyward, J.E. and A.D. Chalfoun. 2011. An assessment of spatiotemporal refugia for coniferous non-game wildlife during the mountain pine beetle epidemic. 18th Annual Meeting, The Wildlife Society, Waikoloa, Hawaii, 5-10 November 2011. (Won best MS student research-in-progress poster award)
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November 2011
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Hethcoat, M.G. and A.D. Chalfoun. 2011. Mechanisms underlying increased songbird nest predation in natural gas fields. 18th Annual Meeting, The Wildlife Society, Waikoloa, Hawaii, 5-10 November 2011.
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November 2011
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Hethcoat, M.G. and A.D. Chalfoun. 2011. Increased nest predation and energy development; understanding the mechanisms. Annual Meeting, The Wyoming Chapter of The Wildlife Society, Jackson, Wyoming, 6-9 December 2011.
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December 2011
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Hall, L., and A. Chalfoun. 2018. Effects of temperature and precipitation on the reproductive investment and output of sagebrush songbirds. WY-TWS and WLCI Joint Meeting, Laramie, WY.
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November 2018
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As warming temperatures continue to manifest, efforts to understand and quantify species' vulnerability to changing climate dynamics will be enhanced by considering the influence of climate-related stressors, including thermoregulatory risk, during key life-history periods. Using Brewer's sparrows (Spizella breweri), Sagebrush sparrows (Artemisiospiza nevadensis) and Sage thrashers (Oreoscoptes montanus) as models, we addressed the extent to which climate variation influenced reproductive inve
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Hall, L., and A. Chalfoun. 2017. Behavioral plasticity buffers temperature constraints on foraging time for a montane mammal. Wyoming Chapter of The Wildlife Society, Jackson, WY, 5-7 December, 2017.
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December 2017
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The extent to which endothermic animals living in extreme environments proximately modify behaviors to reduce physiological stress remains unclear. We examined the plasticity in foraging behaviors of American pikas in the alpine across temperature gradients.
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Gura, K., B. Bedrosian, and A. Chalfoun. 2022. Variation in habitat selection across multiple spatiotemporal scales by great gray owls (Strix nebulosa). Wyoming Chapter of The Wildlife Society, Jackson, WY.
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April 2022
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Habitat selection can differ across spatial and temporal scales, in response to varying selective pressures. Studies that explicitly incorporate multiple relevant spatiotemporal scales therefore strengthen understanding of important resources for a species. We quantified the resource selection of Great Gray Owls across multiple spatial (home range and within-home-range) and temporal (breeding and non-breeding seasons; day and night) scales in western Wyoming,
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Gura, K., B. Bedrosian, S. Patla, and A. Chalfoun. 2019. Great Gray Owl Habitat Selection and Home Range Characteristics During the Breeding Season. Annual meeting of the American Ornithological Society, Anchorage, AK.
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June 2019
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Natural- and human-induced habitat change is increasing across landscapes, with largely unknown consequences for under-studied raptor species. Identifying the breeding-season home range size and resource requirements of such species is critical for the development of effective conservation strategies.
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Gura, K., A. Chalfoun, B. Bedrosian, and S. Patla. 2018. Great gray owl habitat selection and home range characteristics during the breeding season. WY-TWS and WLCI Joint Meeting, Laramie, WY.
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November 2018
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Identifying the home range size and resource requirements of breeding Great Gray Owls is critical for the development of effective conservation strategies for this state-sensitive species, especially in the face of declining productivity and changing forest habitat. We are evaluating the habitat parameters that influence Great Gray Owl territory selection and reproductive success.
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Gura, K. B. Bedrosian, S. Patla, and A. D. Chalfoun. 2019. Great gray owl habitat selection and home range characteristics during the breeding season. Wyoming Chapter of The Wildlife Society Annual Meeting, Sheridan, WY.
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November 2019
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Great Gray Owls (Strix nebulosa) are associated with older-aged, boreal forest habitats, and studies conducted outside of the Rocky Mountains suggest that they respond negatively to the loss of key habitat elements. We quantified breeding-season home-range attributes and habitat selection of adult Great Gray Owls across multiple spatial (home-range and within-home-range level) and temporal (nesting and post-fledging; day versus night) scales in western Wyoming, USA.
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Guernsey, N., K. Lohse, T. Bower, M. Kauffman and J. Goheen. 2012. Sexual segregation of Shiras moose in Wyoming: habitat selection and ecosystem dynamics. 92nd Annual Meeting, American Society of Mammalogists, Reno, Nevada, 22-26 June 2012.
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June 2012
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Goldstein, J., W. Hubert, D. Woodward, A. Farag, and J. Meyer. July 2000. Differences in embryonic temperature tolerance affect the distributions of rainbow trout and brown trout in the Firehole River, Yellowstone National Park. Western Division American Fisheries Society, Telluride, Colorado.
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July 2000
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Girard, C.and A.W. Walters. 2012. “Current and future impacts of energy development on the fishes of the Wyoming Range” Wyoming Landscape Conservation Initiative Science Meeting.
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April 2012
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Girard, C.and A.W. Walters. 2012 “Current and future impacts of energy development on the fishes of the Wyoming Range” American Fisheries Society Western Division meeting, Jackson, WY.
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March 2012
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Girard, C., and A.Walters. 2014. The Dry Piney Study: Energy development effects to native fish communities along the Wyoming Range. CO/WY American Fisheries Society Meeting, Laramie, WY.
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March 2014
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Presents research examining effects of energy development for fish. This is an important and understudied topic with implications for fish maagement.
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Girard, C., A. Walters. 2014. The Dry Piney study: Energy development effects to native fish communities along the Wyoming Range. Western American Fisheries Society meeting, Mazatlan, Mexico.
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April 2014
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This research is one of the few field projects that examines how oil and natural gas affects native fish communities in Wyoming. Carlin Girard was invited to present this research in a special session on energy development at the meeting.
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Girard, C. and A.W. Walters. 2013. The Wyoming Range Fish Project: the impacts of energy development on native fish. CO/WY AFS annual meeting, Fort Collins, CO, February 25-27, 2013.
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February 2013
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Research is addressing the effects of energy development on native fish communities. Energy development is an important anthropogenic disturbance for this region.
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Gerow, K., R. Anderson-Sprecher, and W. Hubert. A new method to compute standard weitht equations that reduces length-related bias. Annual meeting, American Fisheries Society, Anchorage, Alaska.
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September 2005
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Gerow, K., R. Anderson-Sprecher, and W. A. Hubert. A new method to compute standard weight equations that reduces length-related bias. Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming, March 8, 2006.
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March 2006
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Gabe Barrile, Anna D. Chalfoun, Annika Walters. 2015. Boreal toad habitat selection and survival in relation to grazing intensity and disease prevalence. Joint WLCI and Wyoming TWS meeting, Lander, WY, 1-3 December, 2015.
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December 2015
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Amphibian populations are declining worldwide, often due to multiple stressors. We are investigating potential synergistic effects of habitat change due to grazing and disease.
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Gabe Barrile, Anna Chalfoun, Annika Walters. 2016. Boreal toad habitat selection and survival in relation to grazing intensity and disease prevalence. . Annual Meeting of the Wyoming Chapter of The Wildlife Society. Cody, Wyoming.
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November 2016
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Boreal toads are declining in parts of their range. We investigated the independent and interactive effects of habitat changes due to cattle grazing and disease on boreal toads in western Wyoming.
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Fisher, W., and W. Hubert. 2009. American Fisheries Society's past, present and future efforts towards promoting demographic diversity. Annual Meeting, American Fisheries Society, Nashville, Tennessee, 30 August - 3 September 2009.
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September 2009
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Fennell, J., Walters, A., and Wagner, C. 2021. Exploring mechanisms underlying the persistence of Yellowstone cutthroat trout despite hybridization in the North Fork Shoshone River drainage. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2021.
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February 2021
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Understanding the mechanisms of reproductive isolation that exist between Yellowstone cutthroat trout and rainbow trout in the North Fork Shoshone River drainage will inform management decisions in systems where these two species exist in sympatry.
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Fennell, J., Walters, A., and Wagner, C. 2019. Exploring mechanisms underlying the persistence of Yellowstone cutthroat trout despite hybridization in the North Fork Shoshone River drainage. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2019.
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February 2020
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Understanding the mechanisms of reproductive isolation that exist between Yellowstone cutthroat trout and rainbow trout in the North Fork Shoshone River drainage will inform management decisions in systems where these two species exist in sympatry.
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Fennel, J, E. Mandeville, W. Rosenthal, C. Wagner and A. Walters. 2019. Exploring mechanisms underlying the persistence of Yellowstone Cutthroat Trout despite hybridization in the North Fork Shoshone River drainage. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2019.
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February 2019
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The Yellowstone Cutthroat Trout is a species of greatest conservation need in Wyoming. This information will help inform management decisions in systems where Yellowstone Cutthroat Trout and Rainbow Trout exist sympatric to one another.
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Embere Hall, Anna Chalfoun, Erik Beever, Annie Loosen. 2015. Microrefugia in a warming world: Critical resource or simple perk? Joint WLCI and Wyoming TWS meeting, Lander, WY 1-3 December, 2015.
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December 2015
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The American pika inhabits alpine environments in the intermountain west which are experiencing warmer temperatures and altered snowpack conditions. The extent to which pikas may exploit microrefugia from unfavorable weather conditions to promote persistence is largely an open question.
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Embere Hall and Anna Chalfoun. 2016. What to eat in a warming world: Altering forage preferences may buffer climate stress. Annual Meeting of the Wyoming Chapter of The Wildlife Society, Cody, Wyoming.
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November 2016
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Alpine wildlife species may be particularly susceptible to warming climate, however, how animals may alter foraging preferences and behaviors to buffer such effects is unclear. We investigated these questions in the American pika in western Wyoming.
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David G Williams, Corrine N. Knapp, Bryan N Shuman, Bart Geerts, Brent E Ewers, Sarah K Konrad, Shannon Edward Albeke, Todd Cherry, Sarah M Collins, William Fetzer, Clare Gunshenan, Jeff Hamerlinck, Shay Howlin, Kristiana Hansen, Martha Inouye, Mary Keller, Jacki Klancher, Kristen Landerville, Nichole Lumadue, Fabian Nippgen, Kristen Nasman, Ginger B Paige, Tarissa Spoonhunter, Kyle Trumble and Annika Walters. Anticipating Climate Transitions in Wyoming (WyACT). A Trans-disciplinary Approach for Addressing Climate-driven Changes to Water Availability in America's Headwaters Region. American Geophysical Union Fall Meeting 2022
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December 2022
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Water resources in the Rocky Mountain region are under significant threat from climate change. We will use this framework to improve representation of social, economic, ecological and hydrological interactions and processes in integrated models.
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Dare, M., W. Hubert, and T. Wesche. July 2000. Consequences of variable discharge for habitat availability and habitat use by two species of trout in a Wyoming tailwater during winter. Western Division American Fisheries Society, Telluride, Colorado.
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July 2000
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Dare, M. R., W. A. Hubert, and J. S. Meyer. The influence of discharge on hydrogen slufide concentrations and distributions of two trout species in a regulated river. Annual Meeting, Colorado/Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming.
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March 2001
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D.R. Stewart, A.W. Walters, and F.J. Rahel. 2015. Conservation of native Wyoming fishes through identification and implementation of native fish management areas. CO/WY American Fisheries Society Annual Meeting. Fort Collins, CO.
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February 2015
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Priority management areas are a promising tool for fisheries conservation. This study suggests priority management areas for eastern Wyoming streams and provides insight into the best approaches for determining areas.
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Courtemanch, A., M.J. Kauffman. 2008. Seasonal resource selection, movement, and human disturbance of bighorn sheep in the Teton Range. Annual Meeting, The Wildlife Society, Wyoming Chapter, Sheridan, Wyoming, 19-21 Novermber 2008.
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November 2008
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Courtemanch, A., M. J. Kauffman. 2011. Winter habitat selection strategies of a formerly migratory bighorn sheep population in the Teton Range, northwest Wyoming. 18th Annual Conference, The Wildlife Society, Waikoloa, Hawaii, 5-10 November 2011.
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November 2011
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Cook, N., W. Hubert, and F. Rahel. Status of anthropogenically-isolated populations of colorado River cutthroat trout in the upper North Fork Little Snake River drainage. Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Fort Collins, Colorado.
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February 2009
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Cook, N., F. Rahel, and W. Hubert. Status of anthropogenically-isolated populations of Colorado River cutthroat trout in the upper North Fork Little Snake River drainage. Annual Meeting of the Colorado-Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming.
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March 2008
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Cook, K., L. Tronstad, and A. D. Chalfoun. 2019. Wood frog habitat selection and quality in the Bighorn Mountains of Wyoming. Wyoming Chapter of The Wildlife Society Annual Meeting, Sheridan, WY.
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November 2019
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The wood frog (Lithobates sylvaticus) is a glacial relict species in Wyoming that is listed as a Species of Greatest Conservation Need due to lack of information about habitat associations and disease status. We will radio-track up to 50 wood frogs in the Bighorn Mountains from breeding sites to hibernacula during the summers of 2020 and 2021 to quantify habitat preferences at multiple scales and across multiple life stages (breeding, summer foraging, and over-wintering), and test for signs of
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Cook, K., L. Tronstad, and A. Chalfoun. 2022. Habitat selection of an isolated population of the wood frog (Lithobates sylvaticus) in Wyoming. Wyoming Chapter of The Wildlife Society annual meeting, Jackson, WY.
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April 2022
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The wood frog is listed as a Species of Greatest Conservation Need in Wyoming due to a lack of information about key habitat requirements and response to disease (chytridiomycosis). We are addressing knowledge gaps by identifying habitat characteristics selected by adult wood frogs across multiple seasonal stages (breeding, foraging, overwintering), spatial scales (microsite and pond level), and with variation in disease status.
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Cook, K., L. Tronstad, and A. Chalfoun. 2020. Wood Frog Habitat Selection and Quality in the Bighorn Mountains of Wyoming. Annual Meeting of the Colorado Partners in Reptile and Amphibian Conservation. Longmont, CO.
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February 2020
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The wood frog (<i>Lithobates sylvaticus</i>) is a glacial relict species in Wyoming, found only within the Medicine Bow National Forest and the Bighorn Mountains, for which very little information exists on key habitat requirements. Our study will provide valuable information about the habitat needs of, and disease threats to, wood frogs in Wyoming, and the efficacy of a novel approach to identifying suitable breeding habitat for amphibian species of concern.
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Cook, K., L. Tronstad, and A. Chalfoun. 2020. Habitat Selection of a Relictual Amphibian Population Threatened by Disease. Annual meeting of the Colorado/Wyoming Chapter of the American Fisheries Society. Laramie, WY.
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February 2020
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Amphibians, in particular, have experienced catastrophic population declines and extirpations worldwide from habitat change and pathogens such as the chytrid fungus. Understanding the habitat requirements and prevalence of disease in understudied populations is therefore essential for effective management and species’ persistence.
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Compton, R., W. Hubert, F. Rahel, M. Quist, and M. Bower. Riverscape fragmentation affects native fishes in a Colorado River basin headwater stream system, Wyoming. Annual Meeting, American Fisheries Society, San Francisco, California, September 4, 2007.
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September 2007
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Compton, R., W. Hubert, F. Rahel, M. Quist, and M. Bower. Influence of instream structures on the management and conservation of native fishes in the Muddy Creek watershed, Wyoming. Annual Meeting, American Fisheries Society, Lake Placid, New York, September 11, 2006.
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September 2006
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Compton, R., W. Hubert, F. Rahel, M. Quist, and M. Bower. Examining population fragmentation among native Colorado River Basin fishes with the aid of PIT tag technology. Annual Meeting of the Western Division, American Fisheries Society, Portland, Oregon.
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May 2008
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Compton, R. I., W. Hubert, F. Rahel, M. Quist, and M. Bower. Influence of human-made instream structures on the management and conservation of three native Colorado River basin fishes in the Muddy Creek watershed, Wyoming. Annual Meeting, Western Division, American Fisheries Society, Bozeman, Montana, May 18, 2006.
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May 2006
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Compton, R. I., W. Hubert, F. Rahel, M. Quist, and M. Bower. Influence of human-made instream structures on the management and conservation of three native Colorado River basin fishes in the Muddy Creek watershed, Wyoming. Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming, March 7, 2006.
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March 2006
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Compton, R. I., W. A. Hubert, and F. J. Rahel. Influence of human-made instream structures on the management and conservation of three native Colorado River Basin fishes in the Muddy Creek watershed, Wyoming. 27th Annual Recovery Program Researchers Meeting, Recovery Implementation Program for Endangered Species in the Upper Colorado and San Juan River Basins, Moab, Utah, January 18, 2006.
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January 2006
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Compton, R. I., W. A. Hubert, F. J. Rahel, M. C. Quist, and M. R. Bower. Population fragmentation affects native fishes in a Colorado River basin headwater stream system, Wyoming. Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Ft. Collins, Colorado, February 28, 2007.
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February 2007
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Collins, S., W. Fetzer, K. Gauthier, A. Walters, M. Ross, S. Sillen, 2023, Lake productivity trends and harmful algal blooms in the high-elevation Western United States. AGU annual meeting.
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December 2023
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While most research on eutrophication has been conducted in human-dominated watersheds, HABs have recently been reported in relatively undisturbed lakes in the high-elevation Western United States, suggesting that blooms can occur in unexpected settings and may be occurring more frequently.
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Clancy, NG, Issak, DJ, Budy, P, and Walters AW. 2022. Vulnerability of warm-, cool-, & cold-water fishes to stream warming Colorado/Wyoming Chapter of the American Fisheries Society Annual Meeting, Laramie, Wyoming, February 23 - March 3, 2022.
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March 2022
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Climate-induced temperature changes are less frequently considered with regards to cool-, and especially warm-water species. While future declines in species abundance and distribution are likely to depend on dispersal abilities, co-occurring species, and stream drying, this work demonstrates that vulnerability to stream warming is not limited to cold-water fishes.
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Clancy, N.G, D.J. Isaak, P. Budy, A.W. Walters. 2022. Vulnerability of warm-, cool-, & cold-water fishes to stream warming. Joint Aquatic Sciences Meeting, Grand Rapids, Michigan, May 14-20. Oral Presentation.
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May 2022
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Significant declines in many cold-water species have been attributed to stream warming. While future declines in species abundance and distribution are likely to depend on dispersal abilities, co-occurring species, and stream drying, this work demonstrates that vulnerability to stream warming is not limited to cold-water fishes.
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Clancy, N.G, D.J. Isaak, B. Maitland, P. Budy, A.W. Walters. 2022. Thermal refuges for climate vulnerable fishes in Montana. Montana AFS meeting.
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February 2023
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Stream warming is greatly affecting a large number of fishes, but most studies have focused on economically-valuable, cold-water species. While many warmwater fishes are expected to fare better in response to stream warming, increasing in abundance and distribution, that does not preclude other members of the guild from declining when stream temperatures exceed their thermal tolerances.
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Clancy, N., E. Rieger, R. McShane, and A. Walters. 2023. Identifying potential climate-change refugia for fishes in the face of warming, drying, barriers, and invasive species. Western Division American Fisheries Society meeting.
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May 2023
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Climate-change refugia are areas where climate-vulnerable fishes will be able to persist despite declines in other parts of their range. We present a basin-scale approach to identify climate-change refugia that accounts for multiple variables including temperature, streamflow intermittency, invasive species, and barriers and integrates the system-specific knowledge of local biologists.
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Ciepiela, L. and A. Walters. 2016. Estimating spatial heterogeneity and temporal stability of strontium isotope signatures for use in tracking fish movements. National AFS meeting.Kansas City.
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August 2016
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Over the last decade techniques for analyzing environmental chemical and isotopic signatures in otoliths have transformed the way researchers are able to track fish movement. There is a need to understand the temporal stability of isotopic signatures and develop a cost effective tool to estimate the spatial heterogeneity of isotopic signatures across watersheds prior to study initiation.
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Ciepiela, L. and A. Walters. 2016. Estimating spatial heterogeneity and temporal stability of strontium isotope signatures for use in tracking fish movements. CO/WY AFS meeting. Laramie, WY.
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March 2016
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Strontium stable isotopes are a useful tool for assessing fish movement, but there is a need to better understand the temporal stability of isotopic signatures and develop a cost effective tool to estimate the spatial heterogeneity of isotopic signatures across watersheds prior to study initiation.
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Ciepiela, L. R. and Walters, A. 2019. Quantifying ⁸⁷Sr/⁸⁶Sr temporal stability and spatial heterogeneity for use in tracking fish movement. 2019 Oregon Chapter of the American Fisheries Society 55th Annual Meeting, Bend, Oregon.
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March 2019
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Knowing where fish reside, their migration routes and the habitats associated with their growth and reproduction is fundamental to the successful conservation of desired species and the eradication of undesired species. Our research presents an innovative technique for improving inferred fish movement when using otolith microchemistry to track fish movements.
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Ciepiela, L. R. and Walters, A. 2018. Quantifying ⁸⁷Sr/⁸⁶Sr temporal stability and spatial heterogeneity for use in tracking fish movement. Colorado/Wyoming Chapter of the American Fisheries Society, Laramie, Wyoming.
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February 2018
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Knowing where fish reside, their migration routes and the habitats associated with their growth and reproduction is fundamental to the successful conservation of desired species and the eradication of undesired species. Our research presents an innovative technique for improving inferred fish movement when using otolith microchemistry to track fish movements.
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Chalfoun, Anna, Lindsey Sanders, and Tayler Scherr. 2018. Thy neighbors matter: An experimental test of the prey site partitioning hypothesis. American Ornithological Society Annual Meeting, Tucson, AZ.
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April 2018
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Selection of safe reproductive sites is critical for the successful production of offspring. Whereas within-species factors such as microhabitat selection can clearly influence nest predation risk, whether neighborhood effects such as the distribution and attributes of conspecific and/or heterospecific nests influence nest survival, however, remains a largely open question.
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Chalfoun, Anna D., Matthew G. Hethcoat, and Lindsey E. Sanders. 2017. Natural gas fields as ecological traps for nesting birds. Joint Meeting of the American Ornithological Society and Society of Canadian Ornithologists, East Lansing, MI, USA.
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August 2017
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Ecological traps can arise when contemporary, human-induced habitat change decouples habitat preferences with historic fitness outcomes. We investigated whether natural gas fields in Wyoming, USA were functioning as ecological traps for nesting sagebrush songbirds.
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Chalfoun, A., M. Hethcoat, and L. Sanders. 2017. Natural gas fields as ecological traps for nesting birds. Wyoming Chapter of The Wildlife Society Annual Meeting, Jackson, WY, 5-7 December, 2017.
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December 2017
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Ecological traps can arise when contemporary, human-induced habitat change decouples habitat preferences with historic fitness outcomes. We investigated the extent to which natural gas fields may be functioning as ecological traps for declining sagebrush songbirds.
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Chalfoun, A., M. Gilbert, M. Hethcoat, L. Sanders, and T. Scherr. 2018. Are natural gas fields for the birds? An update on WLCI songbird research. WY-TWS and WLCI Joint Conference, Laramie, Wyoming.
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November 2018
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The talk will provide an update of progress and results obtained from the WLCI songbird project which began in 2008. The project has focused on responses of sagebrush songbirds to natural gas development within the WLCI area and the underlying mechanisms.
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Chalfoun, A., L. Sanders, and M. Hethcoat. 2022. Increased abundance of a synanthropic nest predator generates an ecological trap in an altered landscape. Gordon Research Conference, Predator-Prey Interactions, Lucca Italy.
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October 2022
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Altered predator-prey dynamics within disturbed landscapes can result in ecological traps in which evolved habitat preferences no longer confer fitness advantages. The severity and longevity of ecological traps therefore has profound implications for population growth, yet necessitates longer-term studies to delineate, which have been rare.
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Chalfoun, A. D., Sanders, L. E., Scherr, T. M., and M. G. Hethcoat. 2019. Songbirds of the sagebrush sea: declines and mechanisms. American Ornithological Society Annual Meeting, Anchorage, AK.
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June 2019
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This is an invited talk for the "Understanding and Addressing the Collapse of the North American Avifauna" symposium. The talk will discuss some of the mechanisms underlying declines of sagebrush songbirds.
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Chalfoun, A. D., K. Schmidt. 2011. Adaptive nest site selection: Is it for the birds?. 18th Annual Conference, The Wildlife Society, Waikoloa, Hawaii, 5-10 November 2011.
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November 2011
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Carlisle, Jason D., Anna D. Chalfoun, Douglas A. Keinath, Kurt T. Smith, Jeffrey L. Beck, Melanie A. Murphy, Shannon E. Albeke. 2017. The Greater Sage-Grouse as a conservation surrogate: Where are the holes in the umbrella? Joint Meeting of the American Ornithological Society and Society of Canadian Ornithologists, East Lansing, MI, USA.
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August 2017
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Conservation practitioners have been hopeful that the Greater Sage-Grouse (Centrocercus urophasianus) serves as an effective conservation surrogate for other species of concern in the sagebrush biome. Our comprehensive analysis suggests that broad-scale habitat protections for sage-grouse can benefit many other wildlife species that inhabit sagebrush habitats, but the effectiveness of the sage-grouse "umbrella" breaks down at finer spatial scales.
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Carlisle, J.D. and A.D. Chalfoun. 2011. Greater sage-grouse: potential umbrella species for non-game wildlife species of concern? 18th Annual Meeting, The Wildlife Society, Waikoloa, Hawaii, 5-10 November 2011. (Won best PhD student research-in-progress poster award)
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November 2011
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Carlisle, J.D. and A.D. Chalfoun. 2011. Greater sage-grouse: potential umbrella species for non-game wildlife species of concern? Annual Meeting, The Wyoming Chapter of The Wildlife Society, Jackson, Wyoming, 6-9 December 2011.
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December 2011
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Carlisle, J., L. Hall, A. Chalfoun, K. Carr, and L. Sanders. 2017. Sage Thrashers raise the roof: Does an augmented nest structure conceal the nest from predators, or improve its microclimate? Wyoming Chapter of The Wildlife Society Annual Meeting, Jackson, WY, 5-7 December, 2017.
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December 2017
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The extent to which birds can modulate risks of nest failure via nest modifications is rarely documented. We tested alternative hypotheses for why sage thrashers, a sagebrush songbird, build roof structures in addition to the primary nest cup.
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Carlin, M., and A. Chalfoun. 2018. Status of songbird species within western Wyoming gas fields following another decade of development. WY-TWS and WLCI Joint Meeting, Laramie, WY.
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November 2018
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Habitat alteration related to natural resource extraction in the western U.S. is a still-growing challenge for the management of sensitive species of wildlife. By resurveying avian points spanning a gradient of development and originally sampled during the 2008-2009 breeding seasons, we will determine (1) the population status of birds following another decade of development, and (2) whether patterns of abundance and diversity in relation to development remain the same, have relaxed, or have wo
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Carlin, M., A. D. Chalfoun. 2019. Long-term responses of sagebrush songbirds to energy development. Wyoming Chapter of The Wildlife Society Annual Meeting, Sheridan, WY.
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November 2019
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Rapid and widespread habitat changes associated with energy extraction and development have occurred within sagebrush shrublands across Wyoming. We resurveyed 140 point counts originally surveyed a decade previous, to determine whether sagebrush songbird abundance across a natural gas development gradient have remained, stablized, or worsened.
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Carl Brown and Anna Chalfoun. 2016. Temporal changes in snow and tundra use by an alpine-obligate passerine. 2016. Annual Meeting of the Wyoming Chapter of The Wildlife Society, Cody, Wyoming.
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November 2016
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Alpine wildlife may be particularly susceptible to changing climatic regimes, particularly with respect to snowpack. We are investigating the abundance and habitat selection of an alpine-obligate passerine, the black rosy-finch which is one of the least studied birds in North America.
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Carl Brown and Anna Chalfoun. 2015. Distribution of an alpine-obligate passerine in relation to habitat and snowpack. Joint WLCI and Wyoming TWS meeting, Lander, WY, 1-3 December, 2015.
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December 2015
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The black rosy-finch is one of the most understudied birds in North America. A denizen of the alpine during the breeding season, we are investigating distributional patterns in relation to key habitat variables including the presence of snowpack.
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CONSERVING MIGRATORY MULE DEER THROUGH THE UMBRELLA OF SAGE-GROUSE
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August 2014
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Much time and effort is going into conserving habitat for sage grouse. This study evaluates the extent to which sage grouse protections in Wyoming also protect mule deer migration routes.
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C. Webb, L. Combrink, A. Pilkerton, L. Schultz, D. Rhea, and A. Walters. Modeling Influence of Temperature on Colorado River Cutthroat Trout Distribution in the Upper Green River Drainage. 151st American Fisheries Society Annual Meeting, 2021.
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November 2021
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This research enhances our understanding of temperature on the distribution of Colorado River Cutthroat Trout (CRC) and the role of temperature metrics in identifying CRC thermal regimes. It will equip managers with valuable information on the survivability, presence, and thermal tolerance limits of CRC in Wyoming and support further research across the native range of CRC.
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Burckhardt, J. C., W. A. Hubert, R. Gipson, D. Zafft, K. Gelwicks, D. Hawk, and D. Money. The effects of habitat features on the distribution of Myxobolus cerebralis and occurrence of whirling disease among age-0 salmonids in the Salt River drainage, Wyoming-Idaho. Annual meeting Colorado-Wyoming Chapter, American Fisheries Society, Laramie, Wyoming.
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February 2002
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Burckhardt, J. C., W. A. Hubert, R. Gipson, D. Zafft, K. Gelwicks, D. Hawk, and D. Money. The effects of habitat features on the distribution of Myxobolus cerebralis and occurrence of whirling disease among age-0 salmonids in the Salt River drainage, Wyoming-Idaho. 8th Annual Whirling disease Symposium, Denver, Colorado.
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February 2002
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Burckhardt, J. C., W. A. Hubert, R. Gipson, D. Zafft, K. Gelwicks, D. Hawk, and D. Money. The effects of habitat features on the distribution of Myxobolus cerebralis and occurrence of whirling disease among age-0 salmonids in the Salt River drainage, Wyoming-Idaho. 8th Annual Whirling Disease Symposium, Denver, Colorado.
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February 2002
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Burckhardt, J. C., W. A. Hubert, R. Gipson, D. Zafft, K. Gelwicks, D. Hawk, and D. Money. The effects of habitat features on the distribution of Myxobolus cerebralis and occurrence of whirling disease among age-0 salmonids in the Salt Rive drainage, Wyoming-Idaho. Joint meeting of the Idaho and Bonneville chapters, American Fisheries Society, Pocatello, Idaho.
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February 2002
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Bruckhardt, J. C., W. A. Hubert, R. Gipson, D. Zafft, K. Gelwicks, D. Hawk, and D. Money. The effects of habitat features on the distribution of Myxobolus cerebralis and occurrence of whirling disease among age-0 salmonids in the Salt River drainage, Wyoming-Idaho. Annual Meeting, Colorado/Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming.
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March 2001
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Brown, C., and A. Chalfoun. 2018. Temporal changes in snow and tundra use by an alpine-obligate passerine. WY-TWS and WLCI Joint Meeting, Laramie, WY.
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November 2018
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We investigated the use of alpine habitat types by the Black Rosy-Finch (Leucosticte atrata) across breeding stages (pre-nesting, nesting, and post-fledging). This alpine breeding obligate is Wyoming’s highest nesting songbird, and one of the least studied species in North America.
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Brown, C., and A. Chalfoun. 2017. Temporal changes in snow and tundra use by an alpine-obligate passerine. Wyoming Chapter of The Wildlife Society Annual Meeting, Jackson, WY, 5-7 December, 2017.
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December 2017
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We are investigating the habitat use at multiple spatial scales for an alpine-obligate songbird in Wyoming. Improved information about the habitat needs for this species will be critical for the assessment of its conservation status.
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Brittany Wagler, Lindsey Sanders, and Anna Chalfoun. 2016. Do reclaimed areas within natural gas fields augment small mammal body condition and abundance? Annual Meeting of the Wyoming Chapter of The Wildlife Society, Cody, Wyoming.
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November 2016
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Previous work in our lab demonstrated that rodents were more abundant surrounding natural gas wells which elevated nest predation rates of songbird species of concern. Here, we tested whether rodents may be benefitting from reclaimed areas surrounding well pads.
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Brian Hickerson and Annika Walters. 2017. Evaluation of Potential Reintroduction Sites for Hornyhead Chub. Western AFS meeting
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May 2017
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Hornyhead Chub are a Species of Greatest Conservation Need in Wyoming where they are restricted to 26 kilometers of stream habitat in two rivers. Because of this severely restricted distribution there is interest in establishing new Hornyhead Chub populations through translocation.
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Brian Hickerson and Annika Walters. 2017. Evaluation of Potential Reintroduction Sites for Hornyhead Chub. CO/WY AFS meeting
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February 2017
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Hornyhead Chub are a Species of Greatest Conservation Need in Wyoming where they are restricted to 26 kilometers of stream habitat in two rivers. Because of this severely restricted distribution there is interest in establishing new Hornyhead Chub populations through translocation.
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Breiner, M., A. Walters, and A. Chalfoun. 2023. Investigating the influence of breeding habitat and disease on a declining population of Boreal Toads. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2023.
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March 2023
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Exploring multiple causative factors contributing to declines is pertinent for amphibian conservation. For our work, we will investigate the effects of breeding habitat and disease in a declining population of boreal toads in western Wyoming. Findings of this research will aid in the conservation of boreal toads through providing information on habitat requirements and the ability of individuals to cope with disease.
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Bower, M. R., W. A. Hubert, and F. J. Rahel. Factors affecting conservation strategies for roundtail chub, flannelmouth sucker, and bluehead sucker in an isolated headwater watershed in Wyoming. Annual Meeting of the Desert Fishes Council, Tucson, Arizona.
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November 2004
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Booher, E.,A. Walters. 2020. Distribution, habitat use, and evaluation of potential managed translocation sites for Finescale Dace in the Great Plains. Western Division American Fisheries Society Meeting 2020. (cancelled due to covid)
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April 2020
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Factors that influence the distribution of climate relict fish populations are not well understood and could inform strategies to conserve rare and isolated fish populations. We evaluated basin-specific habitat and fish community associations of Finescale Dace, which can guide management actions aimed at safeguarding this species in Great Plains drainages of Wyoming, Nebraska, and South Dakota.
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Booher, E.,A. Walters. 2020. Distribution, habitat use, and evaluation of potential managed translocation sites for Finescale Dace in the Great Plains. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2020.
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February 2020
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Factors that influence the distribution of climate relict fish populations are not well understood and could inform strategies to conserve rare and isolated fish populations. We evaluated basin-specific habitat and fish community associations of Finescale Dace, which can guide management actions aimed at safeguarding this species in Great Plains drainages of Wyoming, Nebraska, and South Dakota.
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Booher, E. and Walters, A. 2018. Classification of habitat suitability for finescale dace in the Belle Fourche - Cheyenne and Niobrara Drainages. Western Division of the American Fisheries Society Annual Meeting, Anchorage, Alaska.
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May 2018
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: Finescale Dace are a recognized species of conservation concern in Wyoming and adjacent states on the Great Plains, where they occur as glacial relict populations. The development of a landscape-level habitat suitability model served as a first step in examination of factors influencing regional distribution of this species and identification of candidate sites for potential managed translocation actions by the Wyoming Game and Fish Department.
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Booher, E. and Walters, A. 2018. A landscape model for distribution and habitat suitability of finescale dace in the Belle Fourche - Cheyenne and Niobrara Drainages. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting, Laramie, Wyoming.
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February 2018
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Finescale Dace are a recognized species of conservation concern in Wyoming and adjacent states on the Great Plains, where they occur as glacial relict populations. The development of a landscape-level habitat suitability model served as a first step in examination of factors influencing regional distribution of this species and identification of candidate sites for potential managed translocation actions by the Wyoming Game and Fish Department.
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Booher, E and A. Walters. 2019. Islanders of the High Plains: finescale dace conservation and management in Wyoming. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2019.
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February 2019
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Finescale Dace is a species of greatest conservation need in Wyoming and adjacent states on the Great Plains. Modeled species-environment relationships will aid in the evaluation of translocation suitability for present and future study sites and provide insight into important factors that drive persistence of a rare minnow in river systems of the High Plains.
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Booher, E and A. Walters. 2019. Islanders of the High Plains: finescale dace conservation and management in Wyoming. American Fisheries Society and the Wildlife Society joint annual conference, Reno, NV.
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October 2019
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Finescale Dace is a species of greatest conservation need in Wyoming and adjacent states on the Great Plains. Modeled species-environment relationships will aid in the evaluation of translocation suitability for present and future study sites and provide insight into important factors that drive persistence of a rare minnow in river systems of the High Plains.
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Bonar, S., W. Hubert, and D. Willis. Standard methods for sampling North American freshwater fishes. Annual meeting of the American Fisheries Society, Ottawa, Canada.
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August 2008
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Bonar, S., W. Hubert, and D. Willis. Standard methods for sampling North American freshwater fishes. Annual Meeting, Western Division, American Fisheries Society, Albuquerque, New Mexico.
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May 2009
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Bonar, S., W. Hubert, and D. Willis. Standard methods for sampling North American freshwater fishes. Annual Meeting of the Western Division, American Fisheries Society, Portland, Oregon.
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May 2008
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Bonar, S. A., W. A. Hubert, and D. W. Willis. 2009. Standard methods for sampling North American freshwater fishes. Annual Meeting of the Western Division of the American Fisheries Society. Albuquerque, New Mexico, May 3-7, 2009.
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May 2009
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Bonar, S. A., W. A. Hubert, and D. W. Willis. 2009. Standard methods for sampling North American freshwater fishes. 139th Annual Meeting of the American Fisheries Society, Nashville, Tennessee. August 30 - September 3, 2009.
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August 2009
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Bonar, S. A., D. W. Willis, and W. A. Hubert. Standard sampling methods for North American freshwater fishes. Annual meeting, American Fisheries Society, Anchorage, Alaska.
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September 2005
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Becker, S.A., M.J. Kauffman, and S. Anderson. 2009. Decline of Jackson moose in northwest Wyoming. 44th Annual Conference and Workshop, North American Moose Conference, Pocatello, Idaho, 14-17 June 2009.
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June 2009
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Beatty, R. J., F. J. Rahel, and W. A. Hubert. Catostomid spawning migrations and late-summer fish assemblages in Muddy Creek, an intermittent watershed in Wyoming. Annual Meeting of the Colorado/Wyoming Chapter, American Fisheries Society, Ft. Collins, Colorado.
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March 2005
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Barrineau, C., W. Hubert, P. Dey, and T. Annear. Evaluation of the design of instream habitat structures relative to winter trout habitat in a low-gradient foothills stream in Wyoming. Annual Meeting of the American Fisheries Society, Madison, Wisconsin.
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August 2004
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Barrineau, C. E., W. A. Hubert, P. D. Dey, and T. C. Annear. Winter ice processes and habitat for salmonids associated with two types of instream habitat structures. Annual Meeting of the Western Division of the American Fisheries Society, Salt Lake City, Utah.
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March 2004
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Barrile, G., A.D. Chalfoun, and A. Walters. 2016. Boreal toad habitat selection and survival in relation to grazing intensity and disease prevalence. CO/WY AFS meeting, Laramie, WY.
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March 2016
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Amphibian populations are declining worldwide, often due to multiple stressors. We are investigating potential synergistic effects of habitat change due to grazing and disease.
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Barrile, G., A. Walters, and A. Chalfoun. 2020. Buy high, sell low: an ecological investment strategy for population stability in a wild amphibian. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2020.
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February 2020
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Our study reveals that adaptive dispersal (i.e., emigration from poor quality breeding sites and settlement in high quality sites) in a dynamic ecosystem can help achieve population stability in an amphibian metapopulation. These results help clarify the mechanistic link between individual movement behavior and population abundance through time.
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Barrile, G., A. D. Chalfoun, and A. Walters. 2019. Does habitat disturbance reduce breeding site fidelity of boreal toads in western Wyoming? Wyoming Chapter of The Wildlife Society Annual Meeting, Sheridan, WY.
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November 2019
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Understanding and predicting how disturbance influences the behavioral strategies of wildlife (e.g., site fidelity versus dispersal) is critical for conservation and management. Our goal in this study is to assess how the breaching of beaver dams (and subsequent draining of ponds) influences breeding site fidelity of boreal toad (Anaxyrus boreas boreas) populations in the Bridger-Teton National Forest in western Wyoming.
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Barrile, G., A. Chalfoun, and A. Walters. 2018. Integrating count and capture-recapture data across multiple life-stages to model population dynamics of boreal toads in western Wyoming. WY-TWS and WLCI Joint Meeting, Laramie, WY.
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November 2018
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Forecasting population responses to natural and anthropogenic stressors is a fundamental challenge for conservation biologists and wildlife managers. Amphibian populations, in particular, pose an additional challenge because various life-stages often rely on different resources, making it difficult to predict the life-stage(s) at which the effects of stressors may manifest.
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Barrile, G., A. Chalfoun, and A. Walters. 2018. Habitat use and body temperature influence Boreal Toad disease risk in Western Wyoming. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting, Laramie, Wyoming.
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February 2018
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Batrachochytrium dendrobatidis (Bd), an emerging fungal pathogen primarily affecting amphibians, has caused severe population declines and several extinctions in amphibian populations worldwide. By developing a better understanding of how habitat influences body temperature and ultimately amphibian-Bd interactions, our results will help inform amphibian conservation worldwide.
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Barrile, G., A. Chalfoun and A. Walters. 2017. Boreal toad habitat selection in relation to livestock grazing and disease prevalence. Joint Meeting of the CO/WY/UT Chapters of the American Fisheries Society, Grand Junction, CO.
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February 2017
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Human-induced change is a dominant cause of global amphibian declines, and may interact with other stressors such as disease. We assessed whether grazing and chytrid fungus interact to influence boreal toad movement, habitat selection and survival.
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Barrile, G., A. Chalfoun,, and A. Walters. 2017. Habitat use and body temperature influence boreal toad disease risk in western Wyoming. Wyoming Chapter of The Wildlife Society Annual Meeting, Jackson, WY, 5-7 December 2017.
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December 2017
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Emerging infectious diseases pose a significant threat to global amphibian populations and biodiversity. We examined how habitat selection may modulate risk of chytrid infection in boreal toads.
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Banks, D., and W. Hubert. Population estimates of native and introduced catostomid species and their hybrids in an isolated headwater tributary to the Green River in Wyoming. Annual Meeting of the Western Division, American Fisheries Society, Portland, Oregon.
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May 2008
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Banks, D., and W. Hubert. Population estimates of native and introduced catostomid species and their hybrids in an isolated headwater tributary to the Green River in Wyoming. Annual Meeting of the Colorado-Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming.
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March 2008
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Banks, D., and W. Hubert. Population estimates of native and introduced catostomid species and their hybrids in an isolated headwater tributary to the Green River in Wyoming. 29th Annual Recovery Program Researchers Meeting, Upper Colorado River Endangered Fish Recovery Program and the San Juan River Basin Recovery Implementation Program, Moab, Utah.
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January 2008
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Baldock, J., A. Walters, and R. Al-Chokhachy. 2019. Evaluating the use of redd counts in monitoring Snake River Cutthroat in spring-fed tributaries of the upper Snake River watershed. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2019.
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February 2019
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The sampling error in redd counts associated with redd superimposition constitutes a considerable gap in our understanding that must be addressed if we are to continue to use redd counts to evaluate population status and trends of Snake River cutthroat trout spawning in groundwater-fed tributaries of the upper Snake River watershed.
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Baldock, J., A. Walters, T. Walsworth, & R. Al-Chokhachy. 2020. Effects of redd superimposition on observer error structure in redd counts: Implications for long-term monitoring of Snake River cutthroat trout in Wyoming. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2020
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February 2020
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The sampling error in redd counts associated with redd superimposition constitutes a considerable gap in our understanding that must be addressed if we are to continue to use redd counts to evaluate population status and trends of Snake River cutthroat trout and other salmonid species.
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Baldock, J., A. Walters, R. Al-Chokhachy, & M. Campbell. 2020. Effects of conspecific redd superimposition on the spawning success of Yellowstone cutthroat trout in Wyoming. Western Division of the American Fisheries Society Annual Meeting 2020. (cancelled due to covid)
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April 2020
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The effect of redd superimposition of the survival of previously laid eggs and fry must be evaluated in order to fully understand fundamental constraints on population parameters for Yellowstone cutthroat trout in western Wyoming.
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Baldock, J., A. Walters, & R. Al-Chokhachy. 2021. Redd superimposition mediates observer error structure in redd counts for Yellowstone Cutthroat trout. Western Division of the American Fisheries Society Annual Meeting 2021.
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May 2021
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The sampling error in redd counts associated with redd superimposition constitutes a considerable gap in our understanding that must be addressed if we are to continue to use redd counts to evaluate population status and trends of Yellowstone Cutthroat Trout and other salmonid species.
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Baldock JR1, Walters A2, & Al-Chokhachy R3. 2022. Hydrologic controls on growth and production of age-0 Snake River Cutthroat Trout. Co-Wy Chapter of the American Fisheries Society Annual Meeting 2022.
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March 2022
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Groundwater input buffers spring-fed streams against seasonal variability in water temperature and discharge such that suitable fish habitat may persist year-round. Our anticipated results will provide a mechanistic understanding of disproportionate contributions of spring-fed streams to metapopulations of cutthroat trout. Further, our results will elucidate the role of spring-fed streams in sustaining trout populations as climate change renders other tributaries unsuitable. <b> </b>
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Baldock JR, Walters A, Al-Chokhachy R, & Campbell MR. 2022. Spawning behavior mediates reproductive success and population productivity of Yellowstone Cutthroat Trout. Joint Aquatic Sciences Meeting 2022.
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May 2022
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The population-level effects of individual competition for suitable spawning habitat constitutes a considerable gap in our understanding of salmonid ecology. Understanding how spawning behavior mediates population dynamics will allow managers and conservationists to focus and refine strategies aimed at ensuring the long-term health of salmonid populations.
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Baldock JR, Walters A, Al-Chokhachy R, & Campbell MR. 2021. Spawning behavior mediates reproductive success and population productivity of Snake River Cutthroat Trout. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2020.
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February 2021
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The population-level effects of individual competition for suitable spawning habitat constitutes a considerable gap in our understanding of salmonid ecology. Understanding how spawning behavior mediates population dynamics will allow managers and conservationists to focus and refine strategies aimed at ensuring the long-term health of salmonid populations.
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Baldock JR, Al-Chokhachy R, Campbell MR, & Walters A. 2023. Timing of reproduction generates fitness trade-offs in Yellowstone Cutthroat Trout. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2023.
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March 2023
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The mechanisms generating and maintaining life history diversity constitute a considerable gap in our understanding of salmonid ecology. Understanding how population-level diversity in the timing of reproduction is maintained provides insight into the adaptive capacity of cutthroat trout to keep pace with climate change.
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Baldock JR, Al-Chokhachy R, Campbell MR, & Walters A. 2023. Timing of reproduction generates fitness trade-offs for Yellowstone Cutthroat Trout. Advances in the Population Ecology of Stream-Dwelling Salmonids VI.
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May 2023
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The mechanisms generating and maintaining life history diversity constitute a considerable gap in our understanding of salmonid ecology. Understanding how population-level diversity in the timing of reproduction is maintained provides insight into the adaptive capacity of cutthroat trout to keep pace with climate change.
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Bailey, P., and W. Hubert. Influence of accessibility by anglers on the dynamics of salmonids in high-mountain lakes. Annual Meeting, Great Plains Fisheries Workers, Sidney, Nebraska.
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February 2001
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Bailey, P., N. Lester, and W. Hubert. Sampling coldwater fish in small standing waters of North America. Annual meeting of the American Fisheries Society, Ottawa, Canada.
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August 2008
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Bailey, P. E., and W. A. Hubert. Influence of accessibility by anglers on the dynamics of salmonids in high-mountain lakes. Annual Meeting, Colorado/Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming.
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March 2001
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Bailey, P, and W. Hubert. Influence of accessibility by anglers on the dynamics of salmonids in high-mountain lakes. Annual Meeting, Great Plains Fisheries Workers, Sidney, Nebraska.
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February 2001
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Ashleigh Rhea, Jason Carlisle, Anna Chalfoun. 2016. Variation in nestling size in three species of sagebrush songbirds. Annual Meeting of the Wyoming Chapter of The Wildlife Society, Cody, Wyoming.
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November 2016
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The frequency and causes of intra-brood size differences in birds are not well understood, but they likely have consequences on subsequent survival of individuals post-fledging. We used data from a recent study of nesting Brewer's Sparrows (Spizella breweri), Vesper Sparrows (Pooecetes gramineus), and Sage Thrashers (Oreoscoptes montanus) to address three research questions: 1) How common are runts? 2) Does the frequency of runts vary by species? 3) Does brood size correlate with the occurr
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Ashleigh Pilkerton, Elizabeth Mandeville, Joe Skorupski, Paul Gerrity, William Rosenthal, Annika Walters, and Catherine Wagner. 2019. Spatiotemporal patterns of hybridization of Walleye and Sauger in the Bighorn and Wind River Sauger Populations. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2019.
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February 2019
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Sauger Sander Canadensis are a species of greatest conservation need in Wyoming due to habitat fragmentation, competition with non-native fish, and the potential loss of genetic integrity through co-occurrence and hybridization with Walleye Sander vitreus. Understanding the spatial and temporal dynamics of hybridization and life histories of the Bighorn and Wind River Sauger populations will facilitate effective management decisions and provide a broader context for population genetic structure
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Annika Walters, Frank Rahel, and Caitlin Peterson. 2017. Which fish species are most vulnerable to warming stream temperatures associated with climate change? Western AFS meeting.
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May 2017
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One challenge for mitigating and managing climate change is predicting which fish species are most vulnerable to warmer stream temperatures. The vulnerability, or the susceptibility of a species to harm, is a function of both exposure and sensitivity.
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Annika Walters, Frank Rahel, and Caitlin Peterson. 2017. Which fish species are most vulnerable to warming stream temperatures associated with climate change? CO/WY AFS meeting.
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February 2017
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One challenge for mitigating and managing climate change is predicting which fish species are most vulnerable to warmer stream temperatures. The vulnerability, or the susceptibility of a species to harm, is a function of both exposure and sensitivity.
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Anna D. Chalfoun, Matthew G. Hethcoat, Tracey N. Johnson Lindsey E. Sanders. 2015. Mechanisms underlying effects of energy development on wildlife: An update on WLCI songbird research. Joint Wyoming TWS and WLCI meeting, Lander, WY, 1-3 December, 2015.
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December 2015
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This talk will provide an update of WLCI-supported research focused on mechanistic understanding of effects of natural gas development effects on three declining songbird species.
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Amadio, C., and W. Hubert. Distribution, habitat associations, and population dynamics of sauger in the upper Wind River watershed, Wyoming. Joint meeting of the Colorado-Wyoming and Bonneville chapters, American Fisheries Society, Grand Junction, Colorado.
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March 2003
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Amadio, C., W. A. Hubert, D. Dufek, K. Johnson, D. Oberlie, J. Deromedi, and M. White. Habitat and dynamics of sauger in a high-elevation watershed in Wyoming. Annual meeting, American Fisheries Society, Quebec, Canada.
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August 2003
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Amadio, C. J., W. A. Hubert, D. Dufek, K. Johnson, and D. Oberlie. Sauger distribution and habitat associations in the Wind River drainage, Wyoming. Annual Meeting of the Western Division of the American Fisheries Society, Salt Lake City, Utah.
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March 2004
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Alford, S. and Walters, A. Evaluating movement and colonization of fish in the Wyoming Range. American Fisheries Society and the Wildlife Society joint annual conference, Reno, NV.
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October 2019
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In the headwater streams of the Wyoming Range native fish encounter frequent disturbances. A long-term monitoring study in this region has examined effects of habitat, disturbance, physiological characteristics, and food availability on persistence of native fish. However, factors that affect colonization have not been examined. Understanding how colonization impacts species persistence is crucial to managing these native fish populations.
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Alford, S. and Walters, A. 2020. Little Fish Insist to Persist: How colonization and movement dynamics enhance native fish resilience. Colorado and Wyoming American Fisheries Society Annual Meeting, Laramie, Wyoming.
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February 2020
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In the headwater streams of the Wyoming Range native fish encounter frequent disturbances. Our goal was to determine short-term colonization capabilities of native fish in the Wyoming Range and evaluate factors affecting fish colonization.
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Alford, S. and Walters, A. 2019. Evaluating colonization of fish in the Wyoming Range. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting 2019.
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February 2019
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In the headwater streams of the Wyoming Range native fish encounter frequent disturbances. A long-term monitoring study in this region has examined effects of habitat, disturbance, physiological characteristics, and food availability on persistence of native fish. However, factors that affect colonization have not been examined. Understanding how colonization impacts species persistence is crucial to managing these native fish populations.
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Alford, S. and Walters, A. 2018. Evaluating factors influencing movement rates of mottled sculpin and mountain sucker in the Wyoming Range. Colorado-Wyoming Subdivision of the American Fisheries Society Student Colloquium, Laramie, Wyoming.
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February 2018
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In the headwater streams of the Wyoming Range mottled sculpin and mountain sucker encounter frequent disturbances. Highly mobile species are more likely to recover post disturbance than less mobile species. Therefore, understanding factors that affect movement rates of mottled sculpin and mountain sucker are crucial to the preservation of these species.
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Alex LeCheminant and Annika Walters. 2017. Movement dynamics and survival of hatchery-reared Colorado River cutthroat trout post-stocking. CO/WY AFS meeting.
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February 2017
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Colorado River cutthroat trout (CRC) have experienced significant declines in distribution and abundance throughout their native range. Despite successful removal of introduced salmonids and consistent stocking efforts since 2007, establishment and reproduction of hatchery reared CRC in La Barge watershed remains limited to date.
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Aikens EO, Kauffman MJ, Merkle JA, Dwinnell SP, Fralick GL, and Monteith KL. 2017. The greenscape shapes surfing of resource waves in a large migratory herbivore. Gordon Research Conference on the Movement Ecology of Animals, Ventura, CA, March 20th, 2017.
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March 2017
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This work provides evidence that the migration route is critical foraging habitat for migrating mule deer. Additionally, this research provides a methodological framework to quantify the habitat quality of migration routes.
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Abrahamse, M., and W. Hubert. Trammel nets for the assessment of burbot stocks in lentic systems: do they provide a reasonable tool? Annual Meeting, Western Division, American Fisheries Society, Albuquerque, New Mexico.
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May 2009
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Abrahamse, M., and W. Hubert. Trammel nets for the assessment of burbot stocks in lentic systems: do they provide a reasonable tool? Annual Meeting, Colorado-Wyoming Chapter, American Fisheries Society, Fort Collins, Colorado.
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February 2009
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Abrahamse, M., W. Hubert, and J. Deromedi. Relative abundance and structure of burbot populations among lakes and reservoirs of the Wind River drainage, Wyoming using standard sampling methods. Annual Meeting of the Colorado-Wyoming Chapter, American Fisheries Society, Cheyenne, Wyoming.
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March 2008
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Abrahamse, M., W. A. Hubert, and J. Deromedi. Assessment of relative abundance and structure of burbot populations among lakes and reservoirs of the Wind River drainage, Wyoming using standard sampling methods. Annual Meeting of the Great Plains Fisheries Workers Association, Sheridan, Wyoming.
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January 2008
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AW Walters, NG Clancy, B Newkirk, R McShane, and C Miller. 2022. Fish drought refuge delineation in intermittent streams. Joint Aquatic Sciences Meeting 2022.
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May 2022
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Identifying and managing for refuges has emerged as an important tool for climate adaptation science and management. Our goal is to synthesize current knowledge on drought refuges for fish and suggest future directions for integrating drought refuges into climate adaptation management and research.
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A. Walters, E. Booher, B. Hickerson, and Mark Kirk. 2021. Non-native species as an emerging threat to northern prairie fishes. American Fisheries Society Annual Meeting 2021.
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November 2021
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Prairie streams are a highly threatened ecosystem due to land use change and hydrologic alteration. We summarize recent studies exploring the role of predation in driving the distribution of native cyprinids in northern prairie streams.
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A. Walters and R. Walker. 2017. Context dependent effects of flow on fish. Society for Freshwater Science annual meeting.
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June 2017
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Creating transferrable flow ecology relationships for fish has proved challenging. We propose that attributes of the flow event, habitat, and fish are the major sources of context dependency that drive variation in fish responses.
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A. LeCheminant and A. Walters. 2018. Movement dynamics and survival of hatchery-reared Colorado River cutthroat trout post-stocking. Colorado-Wyoming Chapter of the American Fisheries Society Annual Meeting, Laramie, Wyoming.
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February 2018
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Colorado River cutthroat trout (CRC), have seen substantial reductions in abundance/geographic distribution within their native range. Increased understanding of factors influencing post-stocking success of CRC is imperative given the current status in addition to the high cost/ labor intensive nature of reintroduction projects.
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