From May 05, 2022 to May 14, 2022, employees of the Altai branch of the “RPC of Fisheries” LLP, together with state inspectors of the Semey fish inspection department of the RGP “Zaisan-Ertis Interregional Basin Fisheries Inspection”, research work was carried out on the Shchulbinsk reservoir – Yertys river by the budget program 256, subprogram 102 on the subject “Determination of the fish productivity of fishery reservoirs, development of biological justifications for the of the permissible fishing limit (ПДУ) of the impact of the fish and other aquatic animals, the regime and regulation of fishing in fishery reservoirs of international importance, as well as an assessment of the condition of fish resources” on the PTF project “Assessment of the role of sport and recreational fishing and its impact on ichthyocenosis in the main fishery water reservoirs of Kazakhstan”.