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Lab members

Contact information for Dr. Gretchen Hansen, Lab PI.

Dr. Gretchen Hansen

Dr. Hansen is an assistant professor of Fisheries Ecology in the Fisheries, Wildlife, and Conservation Biology department at the University of Minnesota. Prior to starting this position in August of 2018, Dr. Hansen worked for five years as a research scientist for the Departments of Natural Resources in Minnesota and Wisconsin.

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Department of Fisheries, Wildlife, and Conservation Biology
University of Minnesota, Twin Cities

135 Skok Hall
2003 Upper Buford Cr
St. Paul, MN 55108

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Dr. Andrew Honsey


Andrew is broadly interested in using quantitative tools to address ecological, evolutionary, and applied questions in fisheries and aquatic systems. His research to date has focused on a variety of topics, including 1) using biphasic growth models to extract a wealth of life history information from growth data for fishes and other ectotherms, 2) justifying the use of degree-days derived from air temperatures to describe fish growth, 3) analyzing yellow perch recruitment synchrony in the Great Lakes, and 4) analyzing lake and catchment characteristics that promote the persistence of cisco in inland Indiana lakes. Andrew’s current research also centers on a variety of topics in aquatic ecology, including 1) analyzing drivers of walleye recruitment in Minnesota’s large lakes, 2) understanding and predicting fish community changes in inland lakes using a hierarchical modeling approach, and 3) expanding our understanding of the relationship between air- and surface water-based degree-days among lakes.

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Dr. Kelsey Vitense


I am a post-doctoral researcher in the Hansen Lab working on assessing walleye habitat in Minnesota lakes to guide and prioritize management. I completed my Ph.D. at the University of Minnesota in 2018, where I developed methods for classifying and predicting transitions between clear- and turbid-water alternative stable states in shallow lakes based on in-lake and watershed characteristics. I also received an M.S. in Quantitative Ecology and Resource Management in 2014 from the University of Washington, where I performed theoretical research on the impacts of habitat loss on predator-prey cycles. I am broadly interested in using mathematical and statistical models to better understand ecological systems, and I am especially happy doing research that has direct management implications. When I’m not writing code or papers, I like to hike, crochet, try new recipes, and see live music.

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