State overview of the Siberian sturgeon (Acipenser baerii) population in the Irtysh basin
Kirichenko O. Isbekov K. Assylbekova S. Aubakirov B. Mukhramova A.
30 December 2023BIOFLUX SRL
AACL Bioflux
2023#16Issue 63349 - 3356 pp.
The article presents a retrospective analysis and the current state of the Siberian sturgeon stocks in the Irtysh basin. For the analysis, published articles on monitoring the state of the sturgeon in the basin reservoirs were used. In total, 39 sources were used, and information on poaching catches and material obtained during operational raids of environmental structures were taken into account. The reasons for the decline in its numbers are shown, including the influence of hydraulic construction and intensive poaching. The biological indicators of the sturgeon population of the Irtysh River for the lastyears are presented, which indicate the undoubted degradation of its stocks. The causes of the depressed state of sturgeon stocks are considered and it is noted that the measures for their protection and the current level of measures for their artificial reproduction are insufficient. The inclusion of individual sturgeon populations in the Red Books of various levels turned out to be an insufficient measure to restore their stocks. Solving the problem of conservation of the nominative subspecies of the West Siberian sturgeon in the Irtysh basin involves the development of a comprehensive program of measures that would include not only the formation of broodstock, artificial reproduction, but also the reacclimatization of the species into the native area, in compliance with the genetic status of individuals released into the basin rivers. The resoration efforts should be backed by maesures taken to curb poaching, and to protect and restore the wintering pits and spawning grounds. The conservation of sturgeon lies in the rational management of their stocks, and this, in turn, consists not only in limiting their fishing but also in artificial reproduction, in order to maintain a stable state of natural populations in nature, together with their protection by preventing illegal fishing. The purpose of this work is to assess the current state of the Siberian sturgeon population in the Irtysh basin and to assess the possibilities of preserving and restoring its population. To ensure success in the restoration of the sturgeon population, measures are proposed to enrich the food base by the preliminary introduction of suitable food organisms, and selection of food objects specific to the invaders. The current sturgeon population is depleted. Despite the measures taken for its protection and artificial reproduction, in the coming years a significant increase in the number is not expected, since the measures to restore the population are irregular and they are not sufficient. The implementation of the project of species acclimatization will allow preserving and restoring the species of depleted biotic communities, by qualitatively improving the composition of the ichthyofauna of water bodies and by preserving the genetic potential of natural populations, and implicitely increasing the biodiversity of the ecosystem by sustainably increasing its natural productivity.
abundance , biodiversity , recommendations , reintroduction , restoration
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Northern Branch of Fisheries Research and Production Center, Kazakhstan
Fisheries Research and Production Center, Almaty, Kazakhstan
Altai Branch of Fisheries Research and Production Center, Ust-Kamenogorsk, Kazakhstan
Northern Branch of Fisheries Research and Production Center
Fisheries Research and Production Center
Altai Branch of Fisheries Research and Production Center
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