The Current State of the Silver Bream Blicca Bjoerkna (Linneus, 1758) in the Upper Part of the Volga Stretch of the Kuibyshev Water Reservoir

Abstract

The current state of size and weight parameters and age structure of silver bream in the upper part of the Volga stretch of the Kuibyshev water reservoir show persistence of a negative trend at the beginning of the current century: a decrease in the size and weight parameters of the silver bream and an increase in the number of younger fish. The current situation can be considered as an indicator of the general negative state of fish resources in the study area.

Changes in biological indicators of the silver bream Blicca bjoerkna at the upper part of the Volga stretch of the Kuybyshev reservoir in connection with the anthropogenic impact

“…Perhaps a role was played by the fact that the nature of the diet of the silver bream is a typical benthic and is able to eat shellfish, in particular, representatives of the genus Dreissena, which form significant reserves of biomass, poorly used by other fish species [4].…”