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Estimation of invertebrate production from patterns of fish predation in western Lake Superior

Transactions of the American Fisheries Society

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Abstract

We used bioenergetic models for lake herring Coregonus artedi, bloater Coregonus hoyi, and rainbow smelt Osmerus mordax to estimate consumption of zooplankton, Mysis, and Diporeia in western Lake Superior for selected years between 1978 and 1995. Total invertebrate biomass consumed yearly ranged from 2.5 to 38 g/mA? with nearly 40% consumed between August and October in all years. Copepod zooplankton represented the largest proportion of biomass collectively consumed by the three species (81%), although rainbow smelt consumed almost twice as much Mysis as zooplankton. Growth efficiency was highest for rainbow smelt (3.84-16.64%) and lower for the coregonids (1.91-12.26%). In the absence of quantitative secondary production values, we suggest our estimates of predatory demand provide a conservative range of the minimum invertebrate production in western Lake Superior during the past 20 years.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Estimation of invertebrate production from patterns of fish predation in western Lake Superior
Series title:
Transactions of the American Fisheries Society
Volume
127
Issue:
3
Year Published:
1998
Language:
English
Contributing office(s):
Great Lakes Science Center
Description:
p. 496-506
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Transactions of the American Fisheries Society
First page:
496
Last page:
506
Number of Pages:
10