THE COMPARATIVE CHARACTERISTIC OF BIOLOGICAL INDICATORS OF THE BREAM ABRAMIS BRAMA IN THE KAMA AND VOLGA REACHESES OF THE KUIBYSHEV RESERVOIR

The article consideres the dimensional and age structure, growth and coefficient of fatness of the bream Abramis brama in the Volga and the Kama reaches of the Kuibyshev reservoir in 2011-2014. In the period of bream spawning, according to Fulton, in May 2012 there was carried out accounting of sire species of bream in the reaches of the Kama, in the Volga reaches in May, 2013. However the average sizes of the body length of the bream statistically did not differ, and values of average mass of his body in the Kama reaches were higher. Fish age in the Volga reaches fluctuated between 2+…11+ years old, i.e. in the Kama reaches there were more species of older age. However, comparing age of the fish caught in 2012, one can see that the results in both places were equal, i.e. reproduction level differs very little. Dominating in catches of 2011-2014 were bream species born in 2004, 2005 and 2008. Among producers there were species of 2004-2005 generations. Growth of the bream in a phase of destabilization of an ecosystem of the Kuibyshev reservoir in comparison even with river conditions was slowed down. It can be noted that growth of the bream in a phase of destabilization of an ecosystem of the Kuibyshev reservoir in comparison even with river conditions was slowed down. In the Volga reaches even-aged individuals of the bream grow better, than in the Kama reaches where biomass of fodder benthos is lower. In the Kama reaches average sizes of fatness coefficient on Fulton are higher than in the Volga reaches.