DYNAMICS OF THE FISH POPULATION OF THE RESERVOIRS OF THE STATE NATIONAL NATURAL PARK "KOKSHETAU"

Abstract

This article presents the results of studies of the dynamics of the fish population of the reservoirs of the State Unitary Enterprise "Kokshetau". Four reservoirs were examined (Zerendinskoe, Imantau, Lobanovo, Shalkar) and nine fish species were studied. In the dynamics of biological indicators, there is a slow growth of roach associated with a lack of feed resources against the background of competition, a certain aging is noted in the population of bream, tench, quite satisfactory indicators are observed in silver carp, carp, common pike, and whitefish had positive dynamics. The dynamics of the biological indicators of the common perch is multidirectional, in Lake Shalkar they were higher compared to other reservoirs, in Lake Zerendinskoe there was a somewhat negative trend, respectively, caused by the launch of fishing. In the dynamics of the age composition, it was found that roach, bream and common pike had a stable population, and the population of tench and silver carp is in a relatively stable state. The state of carp and whitefish populations depends on stocking. According to the results of the research, it is recommended to organize amateur fishing, fishing for reproductive purposes in the reservoirs of the State Enterprise "Kokshetau", and the need for reclamation fishing has been identified.