Angler‐caught piscivore diets reflect fish community changes in Lake Huron

Transactions of the American Fisheries Society
By: , and 



Examination of angler‐caught piscivore stomachs revealed that Lake Trout Salvelinus namaycush, Chinook Salmon Oncorhynchus tshawytscha, and Walleyes Sander vitreus altered their diets in response to unprecedented declines in Lake Huron's main‐basin prey fish community. Diets varied by predator species, season, and location but were nearly always dominated numerically by some combination of Alewife Alosa pseudoharengus, Rainbow Smelt Osmerus mordax, Emerald Shiner Notropis atherinoides, Round Goby Neogobius melanostomus, or terrestrial insects. Rainbow Trout Oncorhynchus mykiss (steelhead), Coho Salmon Oncorhynchus kisutch, and Atlantic Salmon Salmo salar had varied diets that reflected higher contributions of insects. Compared with an earlier (1983–1986) examination of angler‐caught predator fishes from Lake Huron, the contemporary results showed an increase in consumption of nontraditional prey (including conspecifics), use of smaller prey, and an increase in insects in the diet, suggesting that piscivores were faced with chronic prey limitation during this study. The management of all piscivores in Lake Huron will likely require consideration of the pervasive effects of changes in food webs, especially if prey fish remain at low levels.

Study Area

Publication type Article
Publication Subtype Journal Article
Title Angler‐caught piscivore diets reflect fish community changes in Lake Huron
Series title Transactions of the American Fisheries Society
DOI 10.1080/00028487.2014.945659
Volume 143
Issue 6
Year Published 2014
Language English
Publisher American Fisheries Society
Contributing office(s) Great Lakes Science Center
Description 15 p.
First page 1419
Last page 1433
Country Canada, United States
Other Geospatial Lake Huron
Online Only (Y/N) N
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
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