The peculiarities of embryonic and postembryonic development of stellate sturgeon ( а cipensenser stellatus) contained in the different thermal conditions of the water environment

The article is devoted the peculiarities of embryonic and early postembryonic stages of development in control regime and natural heating the water. The efficiency of the current biotechnology artificial reproduction of sturgeons in the Volga hatcheries, including critically endangered species of stellate sturgeon, is determined by the weather conditions of the region and quality of water supply. Particularly noticeable loss fry of stellate sturgeon by artificial reproduction arise during embryonic and early postembryonic development. Consequently the need has arisen data optimization of biotechnological processes, which are devoted to the announcement on the example of one of the unique representatives of the Caspian relict fish fauna.