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Energy density of lake whitefish Coregonus clupeaformis in Lakes Huron and Michigan

Environmental Biology of Fishes

By:
, , , , ,
DOI: 10.1007/s10641-006-9017-4

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Abstract

We collected lake whitefish Coregonus clupeaformis off Alpena and Tawas City, Michigan, USA in Lake Huron and off Muskegon, Michigan USA in Lake Michigan during 2002-2004. We determined energy density and percent dry weight for lake whitefish from both lakes and lipid content for Lake Michigan fish. Energy density increased with increasing fish weight up to 800 g, and then remained relatively constant with further increases in fish weight. Energy density, adjusted for weight, was lower in Lake Huron than in Lake Michigan for both small (???800 g) and large fish (>800 g). Energy density did not differ seasonally for small or large lake whitefish or between adult male and female fish. Energy density was strongly correlated with percent dry weight and percent lipid content. Based on data from commercially caught lake whitefish, body condition was lower in Lake Huron than Lake Michigan during 1981-2003, indicating that the dissimilarity in body condition between the lakes could be long standing. Energy density and lipid content in 2002-2004 in Lake Michigan were lower than data for comparable sized fish collected in 1969-1971. Differences in energy density between lakes were attributed to variation in diet and prey energy content as well as factors that affect feeding rates such as lake whitefish density and prey abundance. ?? Springer Science+Business Media B.V. 2006.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Energy density of lake whitefish Coregonus clupeaformis in Lakes Huron and Michigan
Series title:
Environmental Biology of Fishes
DOI:
10.1007/s10641-006-9017-4
Volume
76
Issue:
2-4
Year Published:
2006
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Environmental Biology of Fishes
First page:
151
Last page:
158
Number of Pages:
8