The state of the main biological indicators of roach (Rutilus rutilus, Linnaeus, 1758) in the upper part of the Volga reach of the Kuibyshev reservoirVladimir Kuznetsov, Igor Galanin, Tatyana Andreeva, Andrey Smirnov and Anastasia PakinaE3S Web of Conf., 539 (2024) 01019DOI: https://doi.org/10.1051/e3sconf/202453901019