Biological characteristic of gustera Blicca bjoerkna at Upper Volga reach of Kuibyshev water reservoir

The state of guster trade, effectiveness of its manifolding, dimensional and age structure of catches and body height in 2009-2012 in upper Volga reach of Kuibyshev water reservoir is considered. It is established that guster trade catch is rather stable, and effectiveness of its manifolding in these years was generally high. The dimensional and age structure tended to decrease in share of senior age individuals, and also some delay of body height was observed.