ISSN:
1573-5133
Keywords:
Myoxocephalus
;
Cottus
;
Food segregation
;
Fishes
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Synopsis Resource partitioning was studied in two benthic Lake Michigan fishes, the deepwater sculpin,Myoxocephalus thompsoni, and the slimy sculpin,Cottus cognatus, that exhibit nearly disjunct distributions along a hypolimnetic depth gradient. Fish were collected in an area of sympatry over two 24 h periods. These sculpins exhibited food segregation—slimy sculpins ate primarilyPontoporeia affinis, deepwater sculpins ate bothP. affinis andMysis relicta — and their depth segregation was associated with the reported abundance of these prey. Different feeding behaviors may be responsible for this association, since slimy sculpins consumed intermediate size ranges ofPontoporeia and deepwater sculpins consumedPontoporeia in a pattern similar to the ambient size distribution. Neither fish showed a daily activity cycle, and both appear food-limited.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00842986
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