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  • Tomas Höök
  • Associate Professor

Tomas received his BS, MS and PhD from the University of Michigan. After completing his PhD, he worked as a research investigator at the Cooperative Cooperative Institute for Limnology and Ecosystem Research. He has been a faculty at Purdue since 2008, and he also serves as Associate Director for Illinois-Indiana Sea Grant.

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  • Jay Beugley
  • Aquatic ecology specialist

Jay Beugly is an Aquatic Ecology Specialist and coordinates field and laboratory research in the lab. Jay received his BS from the Ohio State University and a MS from Ball State. On the side, he is working to complete his PhD at Purdue.

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  • Zach Feiner
  • Postdoctoral researcher

Zach Feiner is a PhD candidate investigating the eco-evolutionary dynamics of life history traits in Great Lakes yellow perch and walleye populations. Fisheries exploitation, climate change, and other anthropogenic stressors can influence not only the ecology of species and populations, but are increasingly recognized as also shaping their evolutionary trajectories on surprisingly short time scales. One aspect of Zach's research is evaluating rapid evolutionary responses of yellow perch maturation schedules to changes in fisheries harvest, in particular asking whether perch evolve in response to increased harvest and if they can recover following harvest moratoria. His research also examines how maternal size and the maternal environment potentially influence offspring size and quality in both perch and walleye. He is also interested in how eco-evolutionary dynamics may influence the resilience of species to other factors such as climate change, food web shifts, and species invasions.

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  • Carolyn Foley
  • Research Associate

Carolyn's background is in invertebrate biology. Her research focuses on growth and survival of benthic macroinvertebrates like Diporeia and Hexagenia, as well as small-bodied fishes like round gobies and young yellow perch. Techniques employed include diet analysis, stable isotope analysis, and RNA:DNA. Carolyn is also the assistant research coordinator for Illinois-Indiana Sea Grant.

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  • Sam Guffey
  • Lab manager

Sam manages the research labs for Dr. Höök and four other professors in Fisheries and Aquatic Sciences. He specializes in designing manipulative experiments, especially those related to ecological physiology. He is also working to increase the utility of fatty acids as biomarkers in freshwater biology research.

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  • Nick Kalejs
  • MS student

Nick Kalejs completed his BS at Notre Dame. He is working on his MS at Purdue as part of a project evaluating potential restoration of spawning reefs in Saginaw Bay, Lake Huron.

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  • Ben Leonhardt
  • MS student

Ben Leonhardt completed his BS in Zoology at the Ohio State University in 2013. After finishing his BS, he worked as a Biological Field Station Assistant at the Ohio State University’s Stone Laboratory in Put-in-Bay, Ohio. From 2014-16, he worked with the Ohio Division of Wildlife and the Ohio State University as a Boat Technician/Research Technician in Fairport Harbor, OH on the shores of Lake Erie. Currently for his MS he is studying food web dynamics, specifically which large-bodied piscivores are taking advantage of the nearshore trophic regime in Lake Michigan.

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  • Tim Malinich
  • PhD student

Tim Malinich is a PhD student in the Höök lab. Tim's interests include fisheries ecology & evolution and fish behavioral ecology. He is currently exploring the impacts of phenotypic plasticity on Yellow Perch (Perca flavescens). His thesis will examine the plastic changes on morphology in perch and potential impacts to maternal effects on perch eggs. His thesis work will utilize a combination of mesocosm and modeling studies. He currently has a M.S. degree in Biology from Central Michigan University where he examined the impacts of larval fish behavior on dispersal within the Great Lakes.

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  • Patricia Nease
  • MS student

Patricia Nease completed her BS in Fisheries and Aquatic Sciences at Colorado State University in 2017. While as CSU, she worked as a Biological Sciences Technician for the USGS in Fort Collins. Currently she is studying whether young of the year Largemouth bass utilize different trophic pathways based on macrophyte abundance in Indiana’s glacial lakes.

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  • Taylor Senegal
  • MS student

Taylor Senegal completed his BS in Marine Biology at UC Santa Cruz in 2014. From 2014-2017, he worked for the Great Basin Institute at Lake Mead National Recreation Area as an aquatic invasive species (AIS) Research Associate. His MS research focuses on trophic pathways supporting fish production, specifically of yellow perch in Lake Michigan. He is also studying differences in morphology as related to habitat location and foraging strategy.

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  • Sarah Stein
  • PhD Student

Sarah Stein is a PhD candidate studying the influences of rivermouths and river plumes on fish population dynamics in the Laurentian Great Lakes. Rivermouths are heterogeneous environments with complex physical and biological dynamics that may promote fish recruitment. Sarah's research uses trophic interactions, habitat utilization, and growth patterns of fishes in tributaries and in nearshore Lake Michigan to explore foodweb subsidies across habitats. The focal species for her study are yellow perch, round goby, and alewife, which comprise native and invasive fishes integral to the Lake Michigan foodweb. To examine rivermouth processes, Sarah uses a diversity of techniques including field studies, statistical modelling, fish physiology, isotope ecology, and biogeochemistry. She is also interested in aquatic ecosystem responses to anthropogenic change, coastal fisheries management, and water resource conservation.

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  • Mitch Zischke
  • Clinical Extension Assistant Professor

Mitch has a strong interest in the natural world, particularly fish. This stems from a desire to spend as much time outside, in or on water, as he can. To foster this interest, he completed a Bachelor of Science (Honors) majoring in Tropical Marine Science at the University of Queensland in Brisbane, Australia (where he is from). After finishing his BSc, he worked as fisheries management officer at the Australian Fisheries Management Authority - the national government department responsible for Australia's fisheries resources. After this, he returned to research where he completed a Ph.D. in Fisheries Science at the University of Queensland. He then worked with Fisheries Queensland, a state-level fisheries monitoring, assessment and management agency. In August 2014 he moved from Australia to West Lafayette, IN to start a postdoctoral position in the Fisheries and Aquatic Sciences research group at Purdue University.


Hiu-Yu Wang, PHD 2008.

Currently Asst. Professor National Taiwan University

Greg Jacobs, MS 2008

Currently PhD student University of Georgia

Kristin Arend, Postdoctoral researcher.

Currently Fisheries Biologist Ohio Department of Natural Resources

James Roberts, PhD 2010.

Currently Fishery Biologist USGS

Daniel Ryan, MS 2010

Currently Fisheries Biologist Pennsylvania Fish and Boat Commission

Daisuke Goto, Postdoctoral researcher

Currently, Ontario

Charlie Roswell, MS 2011

Currently, Fishery Biologist Illinois Natural History Survey

Chris Middaugh, MS 2011

Currently, PhD student University of Arkansas

Christian Perry, MS 2011.

Currently, PhD student Cornell University

Lori Ivan, Postdoctoral researcher

Currently, Michigan State University

Alicia Roswell, Research Technician

Jonah Withers, MS 2013

Currently, Fishery Biologist USFWS

Lee Henebry, MS 2014

Currently, Virginia Tech University

Andrew Honsey, MS 2014

Currently PhD student University of Minnesota

Jay Staton, Lab Technician

Currently, MS student Humboldt State

Tim Sesterhenn, Postdoctoral researcher

Currently Asst. Professor Morningside College

David Coulter, PhD 2015

Currently Post-Doc Southern Illinois University

Zach Feiner, PhD 2015

Currently Post-Doc Purdue University

Allison Hrycik, MS 2015

Currently PhD Student University of Vermont

Zoe Almeida, MS 2016

Currently PhD Student Ohio State University

Margaret Hutton Stadig, MS 2016

Currently Research Biologist Texas Parks and Wildlife