The food of certain fishes of the Lake Champlain watershed.
The food of certain fishes of the Lake Champlain watershed.
Rimsky, K.rsakoff, V.N.
Suppl TO 19TH ANN REPT NEW YORK CONSERV DEPT 1929 : p 88-104
1930
This paper is based upon examination of the alimentary tracts of 2,465 fishes taken in summer. Tables show the percentage of the various kinds of food taken by individuals of stated length, and also give the identification of the food items (often to genus, and sometimes to species). The small fishes are in no way selective as to the kind of Crustacea they feed upon, both Copepoda and Cladocera being taken in about equal amounts. Comparatively few species (Coregonus clupeaformis and Catostomus commersonnii) feed mostly upon mollusks. Mayfly nymphs, midge larvae, and caddisfly larvae are the most im portant kinds of insect food. Practically no fish eggs were found in the alimentary tracts. The most important constituents in the diet of fish-eating species were: Perca flavescens, Boleosoma nigrum olmstedi, Osmerus mordax, Notemigonus crysoleuca, minnows (Cyprinidae), and sunfishes (Centrarchidae) Lepisosteus osseus was found to be the most predacious fish-eating species.