Cooperative Research Units
Education, Research And Technical Assistance For Managing Our Natural Resources
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Dan Isermann

Unit Leader Dan Isermann


  • Ph D South Dakota State University 2003
  • MS Tennessee Technological University 2000
  • BS Southern Illinois University 1997


I serve as Unit Leader of the Wisconsin Cooperative Fishery Research Unit. I earned my degrees from Southern Illinois University (BS), Tennessee Tech University (MS), and South Dakota State University (PhD). Before my employment with USGS, I was an assistant professor of fisheries at the University of Wisconsin-Stevens Point and worked as a fisheries biologist and research scientist with the Ohio Division of Wildlife and the Minnesota DNR.

Research Interests

My research focuses on the population dynamics and management of exploited fish populations, with special emphasis on the estimation of fish age and growth and the evaluation of harvest regulations and stocking. Most of my research endeavors are direct collaborations with state and federal resource agencies that are designed to address agency questions related to management of recreational and commercial fisheries. Specifically, I serve as co-director of the Fisheries Analysis Center, which was established to provide the Wisconsin DNR and other agencies with analysis of fish population dynamics and demographics as they relate to fisheries management and environmental variability.

Teaching Interests

I teach graduate level courses covering fish population dynamics, fisheries management, and applied statistical methods that are frequently used in the assessment of fish populations.

Professional Society Service

  • American Fisheries Society - President WI Chapter of the American Fisheries Society (February 2017 - February 2018)
  • American Fisheries Society - Education Section, North Central Division Representative (September 2014 - September 2016)
  • American Fisheries Society - Chair, Walleye Technical Committee, North Central Division, American Fisheries Society (January 2013 - December 2013)

Research Publications

  • Sethi S.A., W. Larson, K. Turnquist, and D. Isermann. 2018. Estimating the number of contributors to DNA mixtures provides a novel tool for ecology. Methods in Ecology and Evolution. Abstract | 
  • 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.
  • Isermann, D.A., J.J. Breeggemann, and T.J. Paoli. 2018. Evaluation of anal fin spines, otoliths, and scales for estimating age and back-calculated lengths of yellow perch in Southern Green Bay. Journal of Great Lakes Research.
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Current Projects

Completed Projects


  • Advanced Studies in Fisheries Management (2018)

Wisconsin Fish Other Professional Positions and Memberships

  • Dan IsermannLake Michigan Fisheries Forum, Cleveland, Wisconsin ( - September 2018)

Wisconsin Fish University Committees and Workgroups

  • Dan IsermannAssited with an on-campus seminar series focused on fisheries and wildlife resources in the Great Lakes (January 2018 - May 2018)
  • Dan IsermannChair, Treehaven director search and screen committee (July 2015 - September 2015)
  • Dan IsermannMember, UW System Advisory Group for the Liberal Arts Essay Contest/University of Wisconsin-Stevens Point (March 2013 - August 2014)

Current Staff

Federal Staff: 2

Masters Students: 8

Phd Students: 0

Post Docs: 0

University Staff: 6

5 Year Summary

Students graduated: 13

Scientific Publications: 25

Presentations: 150

Wisconsin Cooperative Fishery Research Unit Cooperators

  1. U.S. Geological Survey
  2. University of Wisconsin-Stevens Point
  3. Wisconsin Department of Natural Resources