Biological description of rybca of the Dneprovsko-Bugskoy estuarine system
Journal Title: «Таврійський науковий вісник» - Year 2018, Vol 99, Issue
Abstract
In the article the results of long-term researches are presented on the study of the biological state of the most valuable representative of semicommunicating ikhtiofauny of the DneprovskoBugskoy estuarine system – rybca. An analysis rotined that by comparison to information of past century on meristicheskim signs substantial distinctions are exposed. Reliable distinction exists on the amount of soft-radiation in spinal and abdominal flippers (Mdif=3,26-12,64). The amount of cheshuy went down above a touch-line and increased under it (Mdif=4,78-7,28). The presence of sexual dimorphism in a herd is not set. Structural descriptions of spawning herd, especially their dynamics in time, specify on the critical condition of commercial supplies of rybca in the Dneprovsko-Bugskoy estuarine system. Reproductive ability of Dnepr populyacii of rybca became worse substantially, that required the leadthrough of complex of fish-breeder-reclamative measures.
Authors and Affiliations
К. М. Гейна
Keywords
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