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Feeding rate of young-of-the-year ruffe on eggs of lake whitefish

Journal of Freshwater Ecology

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Abstract

We measured the feeding rate of individual (0.6-12.2 g) young-of-the-year ruffe (Gymnocephalus cernuus) on the live eggs of lake whitefish (Coregonus clupeaformis) at 3, 5, and 9 degrees C in the laboratory. These temperatures were selected because they covered the range of lake temperatures over which eggs of most Great Lakes coregonines would be most vulnerable to predation by ruffe. Ruffe readily consumed lake whitefish eggs, and regression analysis showed consumption increased with ruffe size and water temperature. Mean daily egg consumption as a percent of mean ruffe body weight was 0.25% at 3 degrees C, 0.59% at 5 degrees C, and 1.00% at 9 degrees C.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Feeding rate of young-of-the-year ruffe on eggs of lake whitefish
Series title:
Journal of Freshwater Ecology
Volume
10
Issue:
3
Year Published:
1995
Language:
English
Contributing office(s):
Great Lakes Science Center
Description:
p. 225-229
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Freshwater Ecology
First page:
225
Last page:
229