TY JOUR TI Ecology, biology and nutrition of grayling (Thymallus thymallus Linnaeus, 1758) of river Sotka in Pinezhsky State Reserve KW Pinezhskiy Reserve KW river Sotka KW grayling Thymallus thymallus KW nutrition KW age-related changes in nutrition JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Dvoryankin, G.A. AU Lukina, V.. PY 2022 IS PB Astrakhan State Technical University