TY JOUR TI DISTRIBUTION OF FISH IN THE PREDATOR-PREY SYSTEM IN THE RIVERBED DEPRESSION OF THE LOWER IRTYSH KW stream KW river KW riverbed depression KW fish distribution KW predator-prey system KW hydroacoustic survey KW window of "antipredation" JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Chemagin, A.. PY 2017 IS PB Astrakhan State Technical University