Feeding ecology of sterlet Acipenser ruthenus L. in the Hungarian section of the Danube River
2011
Fieszl, J. | Bogacka-Kapusta, E. | Kapusta, A.,Inland Fisheries Institute, Olsztyn (Poland). Dept. of Ichthyology | Szymanska, U. | Martyniak, A.,University of Warmia and Mazury, Olsztyn (Poland). Dept. of Ichthyology
The feeding habits of sterlet, Acipenser ruthenus L., in the mid section of the Danube (km 1676-1694) was described. The fish were caught in the summers of 1991 and 1992. The food composition of 85 sterlets (mean body length BL = 37.1 cm; body weight W = 540 g) was analyzed. Most of the fish analyzed (98.8 percentage) had full digestive tracts. Sterlet is considered to be a typical benthic feeder. The food analyzed contained insect larvae and pupae (Trichoptera, Chironomidae), amphipods (Corophium sp., Gammarus sp.), bivalves (Bivalvia), polychaetes (Annelida) and barbel, Barbus barbus (L.). The dominant food items in the digestive tracts were larval caddisflies (Trichoptera), Corophium (Amphipoda), and larval Chironomidae
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