Assessment of the state of fishery and results of research on stocks of commercial fish species in retrospective aspect and at the present stage of fishery development of Tsimlyansk reservoir

The Tsimlyansk Reservoir is one of the most important inland freshwater bodies of water in the Russian Federation, which continues to provide an annual catch of aquatic bioresources of up to 8–10 thousand tons, which is 5–7 % of the fish caught in freshwater bodies of water in the country. The Tsimlyansk Reservoir, for more than 70 years of history from the moment of its formation to the present day, remains one of the most fish-productive among inland water bodies with commercial fish productivity of 45–50 kg / ha in previous years, maintaining a fairly high commercial and economic importance for a long time. Multi-species fishing is carried out on the reservoir, the total catch consists of bioresources of seventeen fish species. In this regard, the targets and corresponding biological reference points for stock assessment and exploitation vary among fish species.