TY JOUR TI FEATURES OF BEHAVIOR OF ORDINARY SPRAT (BY RESULTS OF HYDROACOUSTIC RESEARCHES) KW hydroacoustic studies KW ordinary sprat KW Middle Caspian KW western part of the Caspian Sea KW sprat clusters density KW echo intensity KW echogram JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Balchenkov, I.. AU Pomogaeva, T.. PY 2018 IS 2018 PB Astrakhan State Technical University