UDC 639.311; 591.111.1

Sudakova N.V., Elnakib M.A., Rabazanov N.I. COMPARATIVE EVALUATION OF HEMATOLOGICAL PARAMETERS OF FEMALE COPEPODS (POLYODON SPATHULA WALBAUM, 1792) WHEN PRODUCING MATURE OOCYTES FOR FOOD AND FISH BREEDING PURPOSES // Arid Ecosystems. 2022. Vol. 28. № 4 (93). P. 179-188. | PDF

The study is aimed at assessing the state of reproductive function by fish-hematological and morphophysiological indicators of female copepods Polyodons pathula (Walbaum, 1792), which have repeatedly matured and given caviar for food and fish-breeding purposes. The work was carried out in 2019-2020 in the scientific and experimental aquaculture complex «BIOS» in the Astrakhan region. It has been established that the age of fish, the number of ripening and internerest periods are the most important factors that made it possible to compare the fish-biological indicators of female copepods that matured and gave caviar in 2020. The stability of the fatness coefficient explains the degree of reproductive activity of female copepods. There are no significant differences in morphophysiological parameters between age groups, as well as between females from which caviar of various purposes was obtained. Analysis of the leukocyte blood formula of the studied female copepods showed more lymphoid character and viscoelastic properties of leukocytes, as well as cell agglutination properties were noted when separate blood components were separated. The distribution of white blood cell types differed slightly depending on age composition (CV = 35.55 and 35.23%, P < 0.05, CV = 23.96 and 30.92%, P < 0.05, 23 and 18 years, respectively). The results of hematological studies showed that the younger generation (18 years) of female copepods from which caviar was obtained for nutritional purposes is more adapted than older ones (23 years), and the development of reproductive function is less susceptible to stress factors during maturation. A different picture is observed for fish that gave caviar for fish breeding purposes.

Keywords: female copepods, age of maturation, internerest periods, caviar yield, hemoglobin, total serum protein, leukocyte formula, reproductive function.

DOI: 10.24412/1993-3916-2022-4-179-188

EDN: JBHNPI