DYNAMICS OF INVASION OF VARIOUS CARP AGE GROUPS BY MONOGENOUS SUCKERS IN THE LOWER VOLGA RIVER RESERVOIRS
Journal Title: Вестник Астраханского государственного технического университета. Серия: Рыбное хозяйство - Year 2014, Vol 0, Issue 2
Abstract
Any type of monogenous suckers under favourable conditions may cause mass diseases and even their mortality among fish species. The main aim of the study is to make ecological – parasitological monitoring of fish species on monogenoidoses in the lower Volga river reservoirs. Various age groups of carp and wild carp species have been observed in the course of this study. Collection and treatment of data have been conducted according to the generally used techniques. Seven species of monogenous suckers have been discovered during this study. As a result of the studies it has been discovered that monogenous suckers are the most dangerous in the first year of fish life cycle. The first monogenous suckers (D. vastator) were found in carp at the end of May as well as at the beginning of June at the age of 25–30 days. Seasonal dynamics of carp invasion with monogenous suckers has not less than two peaks within spring – autumn period. The given observations also showed that ichtyopathological monitoring of fish species should be of an obliga-tory character as well as treatment – preventive measures must be taken regularly.
Authors and Affiliations
Eleonora Gaifullina, Vladimir Vladimirov, Yulia Grozesku, Anna Bakhareva
Keywords
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