Characteristics of the biochemical composition of the body of fingerlings and yearlings of amur carp (sazan) crosses with breeding belarusian carp

The article presents the results of comparing the biochemical composition of fingerlings and yearlings of crosses obtained from breeding mirror carp and experimental groups of Amur carp. Experimental crosses characterized by elevated levels of dry matter, fat, and protein have been established.
On average, the youngsters of hybrids showed a tendency to increase the content of dry matter, fat and minerals in comparison with the parent forms, as well as the average level of these indicators in collectible Belarusian and foreign breeds.
During wintering, there was a decrease in the content of dry matter, fat and protein in the body of fish and an increase in the content of minerals (ash). A decrease in the consumption of nutrients and, above all, the content of dry matter, fat and protein, are characteristic of more winter-hardy breeds. The expense of dry matter and fat during the winter period in carp hybrids turned out to be slightly higher than in sazan and approached the breeding carp (mother breed). In terms of the nutrient loss in winter, hybrids of breeding carp with sazan and their parent forms were an intermediate position between the collection groups of Belarusian and foreign breeding.
Experimental crosses characterized by elevated levels of dry matter, fat, and protein have been established.

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