The results of breeding the hybrid "of russian sturgeon × lenskiy sturgeon" (Acipenser queldenstqdtii brandt et ratzeburg, 1833 × acipenser baerii, brandt 1869) in recircular systems
In recent years aquaculture generates an increasing interest worldwide and is focused primarily on optimization of fish farming processes, enabling control and management of the environment and quality of feed, mode of feeding, which allows to significantly increasing the yield of marketable products per unit area. Today the pressing issue is the growing of valuable species of fish in recirculation aquaculture systems, this is especially true of sturgeon breeds. Reduce seasonality in production and to raise the extent of automation of process allow technologies of an industrial aquaculture. For year-round and cleaner production of fish in controlled environments with the aim of obtaining maximum productivity and product quality use recircular system. The cultivation of live fish in the RAS and its delivery to the trading network is available throughout the year. In commercial sturgeon culture in Russia and foreign countries, various types and hybrid forms of sturgeon. As a rule, the choice of the object of cultivation is determined by its availability and management qualities (growth rates, survival, adaptability, etc.). The article presents the results of the study of peculiarities of growth of hybrid Russian sturgeon x Siberian sturgeon in regulated conditions of the aquatic environment. Analyzes the intensity of growth and physiological condition of juveniles. Dynamics of growth Russian-ленского a sturgeon reflects gradual increase of weight during the entire period of cultivation. It is noted that the most intensive growth (0,92 %) was observed in an initial stage. During cultivation weight averaged 360,4±27,7 g, absolute length - 46,3±1,0 cm. Histological analysis of the morphofunctional state of gonads revealed the formation of the characteristic features of development of the gonads of females and males.