Technological Indicators of the Marketable Sturgeon Triploids Reared in Recirculating Aquaculture Systems

Abstract

AbstractThe paper studies sterile interspecific hybrids of sturgeon fish between Bester and Russian sturgeon, Siberian sturgeon and Bester of the “Vnirovskaya” breed, Siberian and Stellate sturgeons, reared to marketable size in the recirculating aquaculture systems. Triploids surpassed parental lines on the growth rate and demonstrated high survival. Hybrids of Siberian sturgeon with Bester had the highest total weight and hybrids of Bester with Russian sturgeon had the maximum eviscerated yield. The carcass yield of triploids (64.37–65.83%) is comparable to this indicator in the parental lines. According to the chemical composition, all hybrids were characterized by a high protein content in meat – 17.06–18.30%, and the lipid content varied from 7.27% to 10.92%. Depuration stocking of fish at low temperature for 5 days without feeding had a positive effect on the sensory indicators of the heat-treated muscle tissue. The prospects of hybrids processing to a wide range of products, including delicacy, are determined. On the basis of fish-breeding and technological indicators, sterile interspecific hybrids of sturgeon fish can be recommended as a full-value substitute of pure sturgeon species for marketable fish rearing in the recirculating aquaculture systems.KeywordsHybrid sturgeonRecirculating aquaculture systemsGrowth performanceChemical composition