TY JOUR TI BIOLOGICAL DIVERSITY OF BENTHIC ORGANISMS OF THE LOWER REACHES OF THE VOLGA RIVER KW zoobenthos KW species composition KW number KW biomass KW quantitative indicators KW watercourses KW bottom biocenosis KW benthic organisms JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Zaitsev, V.. AU Tarasova, O.. PY 2016 IS 2016 PB Astrakhan State Technical University