Study of fatty acids in the muscles of garden aquaculture rainbow trout Parasalmo mykiss (Angara river, Irkutsk)

The article presents a biochemical analysis of cage aquaculture of rainbow trout contained in the Angara River that has been carried out for the first time. The tested individuals were kept in cages on the Angara River, within the city of Irkutsk, at a temperature of 12-15. We received the feed Appens GROWER EF in the amount of 2% of the fish weight. Determination of the LC content in extracts of the lipid fraction of fish tissues (white muscles) have been performed by gas chromatography with mass spectrometric and flame ionization detection methods. The interrelationships of the feed composition and the physiological and biochemical processes of growth and development of trout aquaculture have been revealed. Lipids of white muscles of mature Parasalmo mykiss individuals kept in cages of the coastal pelagic river have been studied. Docosahexaenoic and oleic acids dominated in the total lipids in the muscles of the studied individuals. The role of w-3 and w-6 fatty acids in the body of fish and their ratio has been discussed. The article considers the value of consuming rainbow trout as a source of polyunsaturated acids. A high content of physiologically significant ω-3 polyunsaturated fatty acids has been found in the muscles of rainbow trout from the Angara River cage aquaculture. It is indicated that it is better to use fish meat as full-fledged food than its fat. The data obtained characterize the fish studied as a high-quality aquaculture product containing a high percentage of essential fatty acids against the background of a good adaptation of fish to the conditions of their maintenance, including feed.

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