TY JOUR TI Characteristics of perch fish diet in small lake of Lake Onega catchment area KW small lakes KW nutrition KW fodder base KW perch KW ruff KW Karelia KW Lake Munozero JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Georgiev, A.. AU Legun, A.. AU Pogosyan, V.. PY 2021 IS PB Astrakhan State Technical University