The effect of organomineral chelate complexes on the content of chemical elements in fish muscle tissue

The nutritional value of fish depends on the conditions of keeping and feeding. Rational feeding should meet the needs of fish in organic and mineral components. The enrichment of fish diets with minerals rationalizes economic activities in industrial aquaculture and contributes to the production of high-quality fish products. Obtaining products enriched with trace elements is possible by adding organomineral chelate complexes to the diet. The aim of the study was to determine the content of iron, copper, zinc, cobalt, manganese and selenium in the skeletal muscle tissue of fish by atomic absorption spectrometry when feeding feed enriched with organomineral chelate complexes. The experiment was carried out for a month. The object of the study was fingerlings (0+) of rainbow trout (Oncorhynchus mykiss) contained in fisheries in the Leningrad region. The experimental (n=10) and control (n=10) groups were formed by the method of analog pairs. The content of iron (GOST R 56372- 2015), copper (GOST R 56372- 2015), zinc (GOST R 56372- 2015), cobalt (GOST R 56372- 2015), manganese (GOST 32343-2013) and selenium (GOST 31651-2012) were determined in muscle tissue using the MGA-1000 atomic absorption spectrometer (Lumex, Russia). The reliability of the differences between the samples of the experimental and control groups was assessed using the Student's ttest using the Microsoft Excel 2010 application (Microsoft Corp, USA). The differences were considered significant at p≥0.05. The study showed that feeding feed enriched with organomineral chelate complexes can significantly increase the content of copper, zinc and selenium in the muscle tissue of fish. An increase in the content of elements in muscle tissue indicates that the use of chelate complexes contributes to an increase in the nutritional value of fish products. Based on the data obtained, the chelate complex can be recommended for use in industrial aquaculture.