TY JOUR TI EVALUATION OF NATURAL POPULATIONS OF CRAYFISH FOR A SELECTION OF SOURCES OF WILD SPAWNERS FOR CULTIVATION KW crayfish KW breeding KW natural populations of crayfish KW sources of wild spawners KW population reproductive kernel KW temporary regional specification KW points KW bonitation JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Alexandrova, E.. PY 2014 IS 2014 PB Astrakhan State Technical University