The state of the main biological indicators of roach (Rutilus rutilus, Linnaeus, 1758) in the upper part of the Volga reach of the Kuibyshev reservoir

The size-age structure and weight of roach in catches in the autumn period of 2022-2023 are considered in the upper part of the Volga reach of the Kuibyshev reservoir. The correspondence of the biological indicators of roach to the characteristics inherent in the destabilization period of the ecosystem of the Kuibyshev reservoir was established.