Abstract
A brief assessment of the current state of the populations of valuable native fish of the reservoirs of Kazakhstan — Siberian sturgeon of the Irtysh basin, Aral thorn and barbel of the Aral-Syrdarya and Balkhash-Alakol basins, sterlet of the Ural-Caspian basin is presented. Populations of these species, as a result of the influence of anthropogenic factors, have come to almost complete degradation and depletion and need to develop and take urgent measures to preserve and restore them through reintroduction, which is a priority and urgent task for the republic’s fisheries. The prospects of preserving the biological diversity of reservoirs are assessed and the necessity and validity of measures for the reintroduction of endangered fish species are shown, its directions in modern environmental conditions, the sequence and content of individual stages are determined. The conducted research allows us to develop a set of measures for the restoration of populations of oppressed and endangered rare fish species, which includes collecting information on the state of populations of valuable rare fish, determining the optimal number of producers in order to remove them from the natural environment for the formation of repair and breeding herds, working out the biotechnology of their artificial breeding, calculating the required volume of young — the recipient. To ensure the positive effect of fish reintroduction, measures to enrich the feed base by acclimatization of highly productive forage organisms are justified. The implementation of the project will preserve and restore species diversity, qualitatively improve the composition of the ichthyofauna of reservoirs, as well as preserve the genetic potential of natural populations of these species.
Published Version
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