ONTOGENETIC DIET SHIFTS IN AGE-0 STRIPED BASS, MORONE SAXATILIS, FROM THE MIRAMICHI RIVER ESTUARY, GULF OF ST. LAWRENCE

K.A. Robichaud-Leblanc, S.C. Courtenay, J.M. Hanson-1997

Can. J. Zool., 75: 1300-1309, in Rotifer News, 30 (Dec '97)

Larval striped bass (25 mm TL) fed primarily on immature and adult copepods. The onset of exogenous feeding correlated both spatially and temporally with a peak in the abundance of prey. Chesson's alpha index indicated progressive selection of larger prey with increasing size of larval striped bass, from small rotifers to larger calanoid copepods to the relatively large calanoid Eurytemora sp. Mysids and sand shrimp were the principal prey of striped bass 50 mm TL. Contributions by other prey groups (molluscs, polychaetes, amphipods, insects, and larval fish) were minor. Feeding ceased when water temperatures declined below about 3 C in Nov.

(Gulf Fisheries Ctr., Sci. Branch, POB 5030, Moncton, NB E1C 9B6, Canada)

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