Perspectives of artificial reproduction of the vyrezub (Rutilus frisii frisii Nordman, 1840) in Ukraine (a rеview)

Purpose. The main goal of the thematic review was the analysis and generalization of literary sources on the peculiarities of its biology, technological aspects of artificial reproduction and growing of vyrezub (Rutilus frisii frisii Nordman, 1840) for the restoration of its natural population in water bodies of Ukraine. To evaluate the perspectives of artificial reproduction and growing of vyrezub in aquaculture of Ukraine. Findings. As a result of human impact on river networks of Ukraine, the abundance of vyrezub significantly decreased, it has become a rare and at the same time an endangered species. According to retrospective data, vyrezub previously belonged to the widespread commercial species of the Dnipro and Southern Bug rivers. The biological features of this species have been analyzed, the observance of which can allow obtaining viable fish seeds in aquaculture conditions. The adaptive possibilities of vyrezub to artificial conditions of reproduction have been reviewed. Historical information on the reproduction of this species over the last century has been analyzed. On the territory of Ukraine, first attempts to artificially reproduce vyrezub were carried out by specialists of Ukrcherrybvod. According to the results of studies of Ukrainian scientists, several stages of artificial reproduction of vyrezub have been identified, namely: taking spawners from natural water bodies, obtaining eggs and sperm, incubation of eggs in incubation devices, obtaining 6 g fish seeds, release of viable juveniles into natural water bodies. However, the works on artificial reproduction of vyrezub were not successful, which was the reason for their complete cessation. In particular, this species is promising for growing in polyculture, as it does not create intense trophic competition with most objects of freshwater aquaculture, and as a result of the consumption of mollusks will reduce the likelihood of the spread of some invasive fish diseases. Practical value. The review of information sources on various aspects of the use of vyrezub in aquaculture will contribute to the development of a system of separate links of the technology of its cultivation for the needs of rearing in the conditions of aquaculture enterprises and stocking of internal water bodies with viable juveniles.