Diet Compositions of Five Salmonid Species in Lake Michigan from 2015

S.J. Czesny, A. Happel, J. Rinchard, C.R. Bronte, M.S. Kornis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The food web of Lake Michigan has been altered by many invasive species which has created gaps in our knowledge of how energy flows through the system. Current predator prey ratios and trawl catches indicate a sparse prey base compared to predator populations. In an effort to better understand how top predators utilize prey resources, stomachs were processed from angler caught salmonids throughout the 2015 fishing year. In brief, we noted many terrestrial invertebrates in stomachs of steelhead trout and Coho salmon, a specialization on alewife by Chinook salmon, and mixed round goby and alewife consumption by lake and brown trout. We also evaluate spatial and temporal differences in diet compositions of the five salmonid species. This data provides more current descriptions of diets of angler caught fishes in Lake Michigan and offers insights in to how top predators fit into this restructured food web.
Original languageEnglish (US)
Title of host publicationFrom Cities to Farms: Shaping Great Lakes Ecosystems
Pages77-78
StatePublished - 2017

Keywords

  • INHS

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