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The stomach contents of 31 lake herring (Coregonus artedi), captured by anglers from western Lake Superior in the winters of 1993-1995, were examined to determine if predation on rainbow smelt (Osmerus mordax) was occurring as indicated by anglers. Twenty-six (84%) of the stomachs contained rainbow smelt, with an average of 7.0 rainbow smelt/stomach. This was the first documentation of piscivory by lake herring on rainbow smelt in the Great Lakes.
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Piscivory by Lake Superior lake herring (Coregonus artedi) on rainbow smelt (Osmerus mordax) in winter, 1993-1995