Biological structure and abundance dynamics of Pacific rainbow smelt Osmerus dentex (Osmeridae) of the Amur river

Abstract

The feeding spectrum of the Amur pike Esox reichertii Dybowski, 1869 in the reservoirs of the middle and lower reaches of the Amur River was determined. The absence of significant differences in the nutrition of pike of different sexes is shown. The nutrition of pike of different size groups is considered, the comparison of the size and weight indicators of food objects in adjacent size groups of the predator is carried out. The selectivity of pike feeding was assessed. The values of ENG in different size groups of the predator are determined. The nutrition of pike in various areas, conditionally divided into biotopes, is considered. The comparison of pike feeding in winter and summer is carried out.