Physiological justification and evaluation of the effectiveness of the use of Russian-made food in trout farming

Rainbow trout Oncorhynchus mykiss is a widely bred fish species in aquaculture. The obvious relevance of the problem of commercial cultivation of rainbow trout determines the need to improve the technology of its breeding and cultivation using complete compound feeds. The article presents the physiological rationale and effectiveness of using Russian-made food products in trout farming. For comparison, three types of food for rainbow trout, differing from each other in the ratio of protein, fat, fiber, polyunsaturated fatty acids were taken. The daily feeding rate was 1.5% of the fish weight. During the experiment, the main fish-biological, hydrochemical, hematological, and microbiological parameters were monitored. During the study, no opportunistic and pathogenic microorganisms, ecto- and endoparasites were found in fish. The data obtained as a result of clinical, pathoanatomic, hematological and microbiological studies indicate the suitability of all the studied feed samples for growing rainbow trout. It was found that there were no significant differences in growth rate between the tested feeds, and the difference in weight was random and within the margin of error. The growth rate of fish fed with one of the feeds was slightly higher than when fed with the other two. The data clearly shows the obvious superiority of this feed with an increase cost of 257.6 rubles/kg, which makes it as attractive as possible for the end customer.