Ichthyopathological studies of fish in open reservoirs of the far Northeast
https://doi.org/10.52419/issn2072-2419.2024.4.72
Abstract
In the period from 1989 to 2022, bacteriological and helminthological studies of commercial marine and passing salmon fish of the northern Okhotsk Sea were carried out on the basis of the Magadan Scientific Research Institute of Agriculture in order to determine their infection with pathogens of important epizootological and epidemiological significance. Bacteriological research methods have established that a monoculture of virulent bacteria Aeromonas hydrophila has been isolated from the blood and parenchymal organs of pink salmon, chum salmon and coho salmon. 1772 cultures of microorganisms were isolated and identified with the determination of the virulence of aeromonads by the degree of DNA activity.When studying the helminthofauna, the objects of research were 4 species of marine fish in the amount of 3,621 specimens: herring, navaga, spiny flounder and toothed smelt, in which five pathogens of invasions Anisakis simplex, Pseudoterranova decipiens, Pyramicocephalus phocarum, Diphyllobothrium sobolevi, Corynosoma strumosum were registered.The highest rates were observed in Pacific herring - 97.4%, in navaga - 45.3%, smelt - 40.8%. Individuals with combined invasion have been identified: navaga A. simplex, P. phocarum, C. strumosum; flounder A. simplex (P. decipiens), C. strumosum; smelt A.simplex (P. decipiens), D. sobolevi, C. strumosum. In 59.8% of the navaga, plerocercoids of the diphyllobothriid P. phocarum were found. The infection of smelt with diphyllobothria D. sobolevi plerocercoids was 64.8%.During the study of spiny flounder, toothed smelt and navaga, acanthellae of the scraper Corynosoma strumosum were found, which were located on the internal organs and in the body cavity of fish. The total infection rate with this helminth over all the years of research was 98.9%, with an invasion intensity of 74.0.
About the Authors
E. A. Vitomskova
Magadan Scientific Research Institute of Agriculture - a branch of the Federal State
Russian Federation
Russian Federation
Vitomskova E.A. – scientific researcher, candidate of veterinary sciences
E. V. Ginter
Budgetary Scientific Institution FITZ All-Russian Institute of Plant Genetic Resources named after N.I. Vavilov
Russian Federation
Russian Federation
Ginter E.V. – scientific researcher
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Review
For citations:
Vitomskova E.A., Ginter E.V. Ichthyopathological studies of fish in open reservoirs of the far Northeast. International Journal of Veterinary Medicine. 2024;(4):72-81. (In Russ.) https://doi.org/10.52419/issn2072-2419.2024.4.72
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