TY JOUR TI RELIABILITY OF EVALUATION OF THE VOLGA-CASPIAN STOCKS AS A FUNCTION OF CATCHABILITY COEFFICIENT AND VOLUME OF THE RIVER BEACH SEINES KW river beach seine KW catchability coefficient KW quantitative assessment KW aquatic bioresources JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Novozhilov, E.. PY 2013 IS 2013 PB Astrakhan State Technical University