TY JOUR TI THE NUMBER OF UNDERYEARLINGS OF ROACH, BREAM AND PIKE-PERCH IN THE WESTERN PART OF THE NORTHERN CASPIAN SEA IN 2012-2016 KW abundance KW yield KW roach KW bream KW pike-perch KW fingerlings KW juveniles KW Northern Caspian KW the Volga delta KW low-water and high-water years JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Belogolova, L.. AU Solokhina, T.. PY 2017 IS PB Astrakhan State Technical University