METHOD OF PREPARING FEED FOR STURGEON YOUNG FISH Russian patent published in 2000 - IPC

FIELD: pisciculture. SUBSTANCE: hydrolyzate with non-separated non-fermented protein residue and moisture content 35-40%, obtained from fish with degree of hydrolysis 23 to 41% with regard to non-protein nitrogen related to total nitrogen of raw material, is added to fish feed as fish flour substituent in amount 50-60% of the weight of feed mixture. Hydrolysis is carried out with 30% of water based on the weight of minced fish at temperature 55-60 C and pH 6.6 in autoproteolysis mode using proteolytic enzyme preparations. Wetting of feed ingredients is provided by hydrolyzate moisture. EFFECT: increased fish survival and growth rate and reduced expenses owing to increased biological value of feed. 2 cl, 1 tbl, 3 ex