Modern commercial and biological characteristics of zander Sander lucioperca (L) of the Kuibyshev reservoir

The article presents the research materials of pike perch r. Volga and Kuibyshev reservoir noted changes that have occurred in its population. Prior to creation conditions Middle Volga, male zander matured at age 5–6 years, females 6–7 years. In reservoir, becomes sexually mature 4–5 a small part it matures three. due ecological plasticity ability lay eggs wide temperature range, regardless level regime spawning substrate, gradual increase biological indicators, abundance reserves began be noted. Improving feeding contributed earlier puberty, an absolute fecundity fish reservoir. This catches since 1974, which 1985 reached maximum 517 tons (9,2% total catch reservoir). Sufficiently high over past 10–15 years indicate stability stocks currently tend increase. multi-age sizeweight composition is represented by both young older individuals, confirms population good condition.