TY JOUR TI EFFICIENCY OF SEMI-ANADROMOUS AND RIVER FISHES’ REPRODUCTION IN DIFFERENT WATER MODES OF THE VOLGA RIVER KW flood KW spawning KW spawning ground KW reproduction KW roach KW bream KW feeding KW efficiency KW viability KW biomass JO Fisheries AU Chavychalova, N.I. PY 2020 IS 2020 PB FSBI "TSUREN"