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

Wisconsin Fishery Staff Member


Dan Dembkowski

Dan Dembkowski with a sturgeon

Research Scientist
Phone: (715) 346 - 4350
Email: Dan.Dembkowski@uwsp.edu

Biography

I am a Research Scientist with the Wisconsin Cooperative Fishery Research Unit and serve as co-director of the Fisheries Analysis Center. I’ve earned degrees from Carthage College (B.A., 2009), Mississippi State University (M.S., 2011) studying factors that structure fish assemblages in floodplain lakes, and South Dakota State University (Ph.D., 2014) studying yellow perch recruitment and interactions between yellow perch and smallmouth bass.

Research Interest

I am primarily interested in aspects of fisheries management and applied fisheries ecology including recruitment processes, population dynamics, predator-prey interactions, and factors influencing fish assemblage structure. Within these broader topics, I have worked on specific research projects to estimate and model biotic and abiotic influences on yellow perch and walleye recruitment dynamics, evaluate impacts of smallmouth bass and northern pike predation on survival and recruitment of yellow perch and rainbow trout, evaluate the influence of variable prey abundance on walleye energetics, growth, and recruitment, assess habitat associations of and sampling protocols for yellow perch, quantify post-stocking survival and contributions of stocked walleye and muskellunge to year-class strength, identify spatiotemporal trends in fish assemblage structure and function, evaluate age estimation techniques for yellow perch, smallmouth bass, and walleye, and estimate angler motivations and perceptions of interactions between black basses and walleye.

Research Publications Publication Date
Madenjian, C.P., D. Dembkowski, D. Isermann, S. Batterman, S. Chernyak, S. Cogswell, M. Holey. 2019. Absence of PCB hot spot effect in walleye Sander vitreus from Lower Green Bay of Lake Michigan. Archives of Environmental Contamination and Toxicology doi.org/10.1007/s00244-018-00591-9. January 2019
Koenigs, R.P., D.J. Dembkowski, C.D. Lovell, D.A. Isermann, and A. Nickel. 2020. Diets of Double-crested Cormorants in the Winnebago System, Wisconsin. Fisheries Management and Ecology. DOI: 10.1111/fme.12466 | Download August 2020
Dembkowski, D.J., J.A. Kerns, E.G Easterly, D.A. Isermann. Submitted. Electrofishing encounter probability, survival, and dispersal of stocked age-0 Muskellunge in Wisconsin lakes. North American Journal of Fisheries Management 40:383-393. https://doi.org/10.1002/nafm.10418 March 2020
Dembkowski, D.J., D.A. Isermann, and R.P. Koenigs. 2019. Potential for improving among‐reader precision and accuracy of walleye age estimates with minimal training. North American Journal of Fisheries Management DOI: 10.1002/nafm.10293. April 2019
Dembkowski, D.J., D.A. Isermann, and R.P. Koenigs. 2017. Walleye age estimation using otoliths and dorsal spines: preparation techniques and sampling guidelines based on sex and total length. Journal of Fish and Wildlife Management 8:474-486. doi:10.3996/052017-JFWM-038 December 2017
Dembkowski, D.J., D.A. Isermann, C.S. Vandergoot, S.P Hansen, and T.R. Binder. In Press. Short-term survival of lake whitefish following surgical implantation of acoustic transmitters using two forms of anesthesia. Advances in Limnology - Proceedings of the 13th Symposium on the Biology and Management of Coregonid Fishes. March 2020
Dembkowski, D.A., D.A. Isermann, S.R. Hogler, W.A. Larson, and K.N. Turnquist. 2018. Stock structure, dynamics, demographics, and movements of walleyes spawning in four tributaries to Green Bay. Journal of Great Lakes Research. https://doi.org/10.1016/j.jglr.2018.07.002 July 2018
Everson, Jordan
Master's
joeverso@uwsp.edu

Presentations Presentation Date
Shrovnal, J., D. Dembkowski, R. Koenigs, J. Raabe, and D. Isermann. February 2021. Estimating Mortality of Lake Sturgeon in the Lake Winnebago System Using Traditional Age-Based Approaches and Capture-Recapture Models. 81<sup>st</sup> Midwest Fish and Wildlife Conference, St. Paul, Minnesota. February 2021
Shrovnal, J., D. Dembkowski, R. Koenigs, J. Raabe, and D. Isermann. February 2021. Estimating Mortality of Lake Sturgeon in the Lake Winnebago System Using Traditional Age-Based Approaches and Capture-Recapture Models. 50<sup>th</sup> Annual Meeting of the Wisconsin Chapter of the American Fisheries Society, Virtual.<b><i> </i></b> February 2021
Shrovnal, J., D. Dembkowksi, R. Koenigs, J. Raabe, and D. Isermann. January 2020. Estimating Mortality of Lake Sturgeon in the Lake Winnebago System Using Traditional Age-Based Approaches and Capture-Recapture Models. 80th Midwest Fish and Wildlife Conference, Springfield, Illinois. January 2020
Sheffer, R., D. Isermann, D. Dembkowski, and S. Hogler. Movements and habitat use of muskellunge in Green Bay, Lake Michigan. 2018 Annual Summer Meeting, Esocid Technical Committee of the North Central Division of the American Fisheries Society, Spirit Lake, Iowa. August 2018
Sheffer, R., D. Dembkowski, S. Hogler, and D. Isermann. January 2018. Movements and habitat use of muskellunge in Green Bay, Lake Michigan. 78th Midwest Fish and Wildlife Conference. Milwaukee, Wisconsin. January 2018
Krebs, J., R. Sheffer, D. Dembkowski, S. Hogler, J. Raabe and D. Isermann. January 2020. Movements and habitat use of muskellunge in Green Bay, Lake Michigan. 80th Midwest Fish and Wildlife Conference, Springfield, Illinois. January 2020
Krebs, J., R. Sheffer, D. Dembkowski, S. Hogler, J. Raabe and D. Isermann. August-September 2020. Movements and spawning habitat of Muskellunge in Green Bay, Lake Michigan. 2020 150<sup>th</sup> Annual Meeting of the American Fisheries Society. Columbus, Ohio. August 2020
Koenig, L., Isermann, D., Dembkowski, D., Tsehaye, I., Hogler, S., Paoli, T., Hansen, S., Zorn, T., Caroffino, D., and Larson, W. August 2018. Food web interactions among walleyes, lake whitefish, and yellow perch in Green Bay, Lake Michigan. Annual Summer Meeting, Walleye Technical Committee of the North Central Division of the American Fisheries Society, Spirit Lake, Iowa. August 2018
Koenig, L., D. Isermann, D. Dembkowski, W. Larson, K. I. Tsehaye, S. Hansen, S. Hogler, T. Paoli, and T. Zorn. January 2020. Food web interactions among walleyes, lake whitefish, and yellow perch in Green Bay, Lake Michigan. Midwest Fish and Wildlife Conference. Springfield, Illinois. January 2020
Koenig, L., D. Isermann, D. Dembkowski, W. Larson, K. I. Tsehaye, S. Hansen, S. Hogler, T. Paoli, and T. Zorn. February 2019. Food web interactions among walleyes, lake whitefish, and yellow perch in Green Bay, Lake Michigan. Wisconsin Chapter of the American Fisheries Society. Green Bay, Wisconsin. February 2019
Kerns, J., D. Dembkowski, D. Isermann, M. Donofrio, and E. Baker. October 2015. Comparison of lake sturgeon growth rates estimated from fin rays and mark-recapture. North American Sturgeon and Paddlefish Society. Oshkosh, Wisconsin. October 2015
Keiler-Klein, A., D.A. Isermann, D.J. Dembkowski, and L.D. Koenig. 2019. Differential predation of round goby by walleye, yellow perch, and lake whitefish. Wisconsin Chapter of the American Fisheries Society. Green Bay, Wisconsin. February 2019
Keiler-Klein, A., D.A. Isermann, D.J. Dembkowski, and L.D. Koenig. 2019. Differential predation of round goby by walleye, yellow perch, and lake whitefish. Research in the Rotunda. Madison, Wisconsin. April 2019
Johnson, J., D. Isermann, W. Larson, D. Dembkowski, and R. Koenigs. February 2019. Stock discrimination of lake sturgeon in the Lake Winnebago System using otolith and fin ray microchemistry. Wisconsin Chapter of the American Fisheries Society. Green Bay, Wisconsin. February 2019
Johnson, J., D. Isermann, D. Dembkowski, and R. Koenigs. September 2019. Stock discrimination of lake sturgeon in the Lake Winnebago system using otolith and fin ray microchemistry. North American Sturgeon and Paddlefish Society. Manitoba, Canada. September 2019
Johnson, J., D. Isermann, D. Dembkowski, and R. Koenigs. January 2020. Stock discrimination of lake sturgeon in the Lake Winnebago System using otolith and fin ray microchemistry. 80th Annual Midwest Fish and Wildlife Conference. Springfield, Illinois. January 2020
Jaksha, N., D. Dembkowski, J. Gostiaux, J. Raabe and D. Isermann. January 2020. Diets of Larval Walleye in Northern Wisconsin Lakes. 80th Annual Midwest Fish and Wildlife Conference, Springfield, Illinois. January 2020
Isermann<sup>, </sup>D., D. Dembkowski, S. Carpenter, J. Vander Zanden, J. Hennessy, G. Hansen, J. Hansen, A. Latzka, H. Embke, G. Coppola, Z. Lawson, Z. Feiner, G. Sass, H. Boehm, J. Gostiaux, and E. Brandt. Bucketmouths, Bottlenecks, and Busted Headlights: A Timeline of Field-Based Efforts to Understand Walleye and Yellow Perch Recruitment in Northern Wisconsin. 81st Annual Meeting of the Midwest Fish and Wildlife Conference. Virtual. February 2021
Isermann, D.I., T. Binder, T. Hayden, S. Hansen, D. Caroffino, D. Dembkowski, W. Larson, C. Krueger, and C. Vandergoot. May 2021. Telemetry, Genomics, and Conventional Tagging Inform Lake Whitefish Management in Northwestern Lake Michigan. 2021 Virtual International Association of Great Lakes Research. May 2021
Isermann, D., T. Binder, T. Hayden, S. Hansen, D. Caroffino, D. Dembkowski, W. Larson, C. Krueger, and C. Vandergoot. February 2021. Generalized Movements, Spawning Site Fidelity, and Thermal Ecology of Lake Whitefish in Northwestern Lake Michigan. 81st Annual Meeting of the Midwest Fish and Wildlife Conference. Virtual. February 2021
Isermann, D., T. Binder, T. Hayden, S. Hansen, D. Caroffino, D. Dembkowski, W. Larson, C. Kreuger, and C. Vandergoot. February 2021. Generalized Movements, Spawning Site Fidelity, and Thermal Ecology of Lake Whitefish in Northwestern Lake Michigan. Annual Meeting of the Wisconsin Chapter of the American Fisheries Society. Virtual. February 2021
Isermann, D., D. Dembkowksi, M. Donofrio, J. Schulze, and J. Raabe. Maintaining Trophy Potential of Riverine Smallmouth Bass Populations in the Upper Midwest: An Assessment using the Menominee River, Wisconsin-Michigan, as a Model. January 2020. 80th Midwest Fish and Wildlife Conference, Springfield, Illinois. January 2020
Easterly, E., D. Isermann, M. Donofrio, and D. Dembkowski. Comparison of Lake Sturgeon Growth and Survival Using Fin Rays and Capture-Recapture Data. Wisconsin Chapter of the American Fisheries Society Annual Meeting. Green Bay, Wisconsin. February 2019
Dembkowski, D.J., R.P. Koenigs, and D.A. Isermann. January 2018. Microelemental signatures of tributaries to the Lake Winnebago system. 78th Annual Fish and Wildlife Conference. Milwaukee, Wisconsin. January 2018
Dembkowski, D.J., R.J. Eastman, and D.A. Isermann. 2020. Yellow perch recruitment synchrony in six northern Wisconsin lakes. 80th Midwest Fish and Wildlife Conference. Springfield, IL. January 2020
Dembkowski, D.J., J. Miazga, and D.A. Isermann. 2020. Replicating Northern Pike cleithra ages using otoliths, pelvic fin rays, and scales: precision and sampling guidelines based on sex and total length. 80th Midwest Fish and Wildlife Conference. Springfield, IL. January 2020
Dembkowski, D.J., D.A. Isermann, and T. Parks. 2021. Cisco population characteristics in Wisconsin lakes. 81<sup>st</sup> Annual Midwest Fish and Wildlife Conference; St. Paul, MN. February 2021
Dembkowski, D.J., D.A. Isermann, and R.P. Koenigs. January 2018. Walleye age estimation using otoliths and dorsal spines: insights on precision at a statewide level. 78th Annual Midwest Fish and Wildlife Conference. Milwaukee, Wisconsin. January 2018
Dembkowski, D.J., D.A. Isermann, and L.D. Eslinger. 2019. Temporal stability of adult muskellunge abundance in northern Wisconsin lakes. Joint Technical Committee Meetings. Webster, South Dakota. July 2019
Dembkowski, D.J., D.A. Isermann, and C.S. Vandergoot. 2017. Short-term survival of lake whitefish following surgical implantation of acoustic transmitters using two forms of anesthesia. Wisconsin Chapter of the American Fisheries Society. Milwaukee, Wisconsin. February 2017
Dembkowski, D.J., D.A. Isermann, T. Hayden, C. Vandergoot, S. Hogler, T. Zorn, and C. Krueger. 2020. Fishery contributions, seasonal movements, and spawning site fidelity of Green Bay Walleyes. 80th Midwest Fish and Wildlife Conference. Springfield, IL. January 2020
Dembkowski, D.J., D.A. Isermann, S.R. Hogler, K.N. Turnquist, and W.A. Larson. January 2018. Walleye movements in Green Bay: testing assumptions of the current conceptual model for management. 78th Annual Midwest Fish and Wildlife Conference. Milwaukee, Wisconsin. January 2018
Dembkowski, D.J., D.A. Isermann, C.S. Vandergoot, S.P. Hansen, and T.R. Binder. 2017. Short-term survival of lake whitefish following surgical implantation of acoustic transmitters using two forms of anesthesia. 13th International Coregonid Symposium. Bayfield, Wisconsin. September 2017
Dembkowski, D., D. Isermann, L. Eslinger, T. Cichosz, J. Hennessy, and J. Kubisiak. 2021. Using the past to inform the present: temporal stability of adult muskellunge populations in northern Wisconsin lakes. Annual Meeting of the Wisconsin Chapter of the American Fisheries Society. Virtual. February 2021
Dembkowkski, D., and D.A. Isermann. July 2017. Wisconsin walleye research. 2017 Joint Meeting of the Centrarchid, Esocid, and Walleye Technical Committees-North Central Division of the American Fisheries Society. July 2017
Coppola, G., C. J. Kelling, D. Dembkowski and D. A. Isermann. February 2021. Effects of climate-induced shifts in hatch timing on early life history of largemouth bass in Wisconsin. 81<sup>st</sup> Annual Midwest Fish and Wildlife Conference, virtual. February 2021
Coppola, G., C. J. Kelling, D. Dembkowski and D. A. Isermann. February 2021. Effects of climate-induced shifts in hatch timing on early life history of largemouth bass in Wisconsin. 50<sup>th</sup> Annual Meeting of the Wisconsin Chapter of the American Fisheries Society, virtual. February 2021
Carpenter, K., T. Zorn, D. Isermann, C. Isermann, and D. Dembkowski. March 2017. Precision of Otolith and Dorsal Spine Age Estimates for Walleye Sander vitreus in Northern Lake Michigan. 46th Annual Wisconsin Chapter of the American Fisheries Society Meeting. Milwaukee, Wisconsin. February 2017
Brandt., E.J., Z.S. Feiner, A.W. Latzka, and D.A. Isermann. January–February 2020. Evidence for synchrony between Yellow Perch and Walleye recruitment dynamics and temporal trends in northern Wisconsin lakes. 81st Midwest Fish & Wildlife Conference. St. Paul, Minnesota. February 2021
Brandt., E.J., D.J. Dembkowski, A.W. Latzka, J.M. Hennessy, and D.A. Isermann. January–February 2020. Assessing abundance of centrarchids in northern Wisconsin lakes with different Walleye recruitment histories. 81st Midwest Fish & Wildlife Conference. St. Paul, Minnesota. February 2021
Brandt., E.J., D.J. Dembkowski, A.W. Latzka, J.M. Hennessy, and D.A. Isermann. February 2020. Assessing abundance of centrarchids in northern Wisconsin lakes with different Walleye recruitment histories. 50th Annual Meeting of the Wisconsin Chapter of the American Fisheries Society. Virtual. February 2021
Brandt., E. J., D.A. Isermann, and D.J. Dembkowski. July 2019. Assessing abundance of centrarchids and juvenile Yellow Perch in northern Wisconsin lakes with different Walleye recruitment histories. 2019 Joint Meeting of the Centrarchid, Esocid, and Walleye Technical Committees – North Central Division of the American Fisheries Society. Webster, South Dakota. July 2019