New supplementary feeds for sterlet in industrial cultivation

An increasingly significant deficit of fish meal necessary for the production of quality fish feed requires the use of new components characterised by high levels of protein and fat. This article presents the results of a feed supplements study with a protein component based on soldier fly and probiotics. The study of fish-biological parameters of fish revealed that the absolute and average daily gain in the variant with feed KV54 + soldier fly is higher by 40.9 %, the mass accumulation ratio by 33.3 %, compared with the control variant, with survival rate of 100 %. Feeding coefficient in the experiment variant KV54+soldier fly is lower compared to the control by 1.3 units, i.e. by 34 %. The physiological and biochemical parameters of fish blood were within the normal range for fish from a natural reservoir