TY JOUR TI RELEVANCE OF USE OF FEED ADDITIVES BASED ON SECONDARY RAW MATERIALS OF THE FISHING INDUSTRY IN THE DIETS OF RAINBOW TROUT KW living resources KW aquaculture KW secondary products of fish cutting KW chemical composition KW forage production KW rainbow trout JO Fisheries AU Sokolov, A.V. AU Dvoryaninova, O.P. AU Zemlyanukhina, O.A. PY 2020 IS 2020 PB FSBI "TSUREN"