The effect of the feed additive «Kormogran selen-3» on fish breeding, morphometric indicators and marketable qualities of Rainbow trout

An experimental cultivation of rainbow trout was carried out using the selenium-containing feed additive «Kormogran Selen-3». According to a number of morphometric parameters, there were no significant true differences between the experimental and control groups, however, an intensification of fat metabolism in the trout of the experimental group was established, which slowed down the process of accumulation of intracavitary fat by individuals. This caused some lag in the process of total mass accumulation and some decrease in fish-breeding and biological indicators. At the same time, there was no decrease in the rate of linear growth and overall development of fish. The main accumulation of selenium occurred in the liver, where its content increased by 613,9 times (from 1112 to 15363 μg/kg). At the same time, the content of this element in white muscles increased by 5,2 times, and in red – by 2 times, which indicates the possibility of intravital enrichment of muscle tissue of rainbow trout with selenium. The analysis of the quality of commercial fish and its nutritional value showed the advantages of the experimental batch in comparison with the control of the yield of edible parts, organoleptic evaluation of smoked products, which at the same time can be attributed to a functional product as a source of selenium.