A Comparative Assessment of Hematological Indicators of Paddlefish (Polyodon Spathula Walbaum, 1792) when Obtaining Mature Oocytes for Food and Fish-Breeding Purposes

A Comparative Assessment of Hematological Indicators of Paddlefish (Polyodon Spathula Walbaum, 1792) when Obtaining Mature Oocytes for Food and Fish-Breeding Purposes

This study was aimed at assessing the state of reproductive function according to the fish-breeding, hematological, and morphophysiological parameters of the female paddlefish Polyodonspathula (Walbaum, 1792), which have repeatedly matured and spawned for food and fish breeding purposes. The work wa...

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Bibliographic Details
Published in:Arid ecosystems Vol. 12; no. 4; pp. 496 - 504
Main Authors: Sudakova, N. V., Elnakib, M. A., Rabazanov, N. I.
Format: Journal Article
Language:English
Published: Moscow Pleiades Publishing 01-12-2022
Springer Nature B.V
Subjects:
Age
Age composition
Age groups
Age structure
Agglutination
Aquaculture
Biomedical and Life Sciences
Blood
Breeding
Caviar
Cell agglutination
Ecology
Females
Fish
Food
Foods
Freshwater fishes
Gametocytes
Hematology
Leukocytes
Life Sciences
Oocytes
Parameters
Polyculture (aquaculture)
Polyodon spathula
Viscoelasticity
Water Ecosystems of Arid Territories
spawn yield
female paddlefish
interspawning periods
total serum protein
leukocyte count
maturation age
hemoglobin
reproductive function
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Summary:This study was aimed at assessing the state of reproductive function according to the fish-breeding, hematological, and morphophysiological parameters of the female paddlefish Polyodonspathula (Walbaum, 1792), which have repeatedly matured and spawned for food and fish breeding purposes. The work was carried out in 2019–2020 at the BIOS experimental aquaculture complex in the Astrakhan region. It has been shown that the age of the fish, the number of maturations, and the interspawning periods are the most important factors that made it possible to compare the fish-breeding and biological parameters of paddlefish females that matured and spawned in 2020. The stability of the coefficient of fatness explains the degree of activity of the reproductive function of female paddlefish. Significant differences in morphophysiological parameters between age groups, as well as between females from which caviar for various purposes was obtained, have not been shown. The leukocyte formula of the blood of the studied paddlefish females showed a lymphoid character and viscoelastic properties of leukocytes, as well as the cell agglutination noted during the separation of individual blood components. The distribution of leukocyte types differed slightly depending on the 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 old) of female paddlefish, from which caviar was obtained for food purposes, is better adapted than the older generation (23 years old), and the development of reproductive function is less susceptible to stress factors during maturation. A different picture is observed for fish that have spawned for fish breeding purposes.
ISSN:2079-0961
2079-0988
DOI:10.1134/S2079096122040205