The article reports data on the dynamics of blood parameters and parameters of protein, fat, and water-salt metabolism in female starlet × beluga hybrids kept under artificial conditions in the period of reproductive cycle. Gonad maturation in female hybrids in the artificial environment causes clear changes in the biochemistry of blood and of urine.

The analyze of dynamic of quantity and composition of the Russian catches in the Sea of Azov, Black and Caspian Seas in the 21st century was made. It has been shown that catches decrease with a simultaneous increase in the proportion of marine fish proper. The analyze of aquaculture development in southern regions is provided and also identified the prospects for its development in the near future. Currently, there is a positive dynamics of growth in the production of commercial fish farming products. Since 2000 this parameter has decreased from 77 to 328 thousand tons in 2020. The volume of aquaculture in the southern regions of the country in 2020 amounted to more than 78 thousand tons, which is 24% of the total Russian. In Rostov and Astrakhan region, Krasnodar territory obtained 90.6% aquaculture production. The perspective ways are pasture aquaculture, ponds and industrial fish farming, recreational aquaculture, mariculture. The expansion of the species diversity of farmed fish is possible both due to the aboriginal ichthyofauna and the use of previously acclimatized species.