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Principal Diseases Of Fish And Trends In Their Investigations In Waters Of The Azov Sea Basin Helena V. Shestakovskaya, and Anna V. Kazarnikova Rosryb NII
Poroject, Ichthyopathological Laboratory, Oborona St.49, Rostov-on-Don, Russia,
344007
Complex
ichthyopathological researches on monitoring diseases of main commercial and
pond fish in the Azov sea basin waterbodies have been carried on since 1974.
According to the data from the literature and our own investigations, 339
species of parasites have been found in commercial and farmed fish in the Azov
sea basin. From then the most prevalent
are monogenetic worms and trematode larvae.
The most dangerous are the monogeneans,
Dactylogyrus extensus, D.
vastator, and the cestodes Ligula
intestinalis, Digramma interrupta, as well as representatives of Diplostomid crustaceans Achtheres percarum and Ergasilus
sieboldi. Besides these are the mixed
diseases complicated by toxicoses (in particular ambithriosis x toxicoses, aeromoniasis
x toxicoses, pseudomoniasis x toxicoses etc.) which can be caused by several
pathogens usually present under daily conditions. New diseases have been observed with the advent of new
industrial rearing technologies and specialized diets, which include such
conditions as white mouth, abdominal failure of juvenile carp, as well as other
gill and kidney diseases. Before
treatment of these conditions is initiated, one should first improve the
physiological status of the fish based upon water quality maintenance
practices, and favorable culture conditions including rearing density, proper
use of manufactured feeds etc.
Generalization of ichthyopathological data, systematization of
hydrochemical, toxicological and other data from different fish farms afforded
us the opportunity to create a database and make the prognoses of the epizootic
situation under conditions of anthropogenic pollution. The generalized data
were included in a database on the epizootic status of main Russian fish farms.
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