Infection dynamics of younger age groups of Dactylogyrus hypophthalmichthys silver carp under the conditions of the Lower Volga fish farms
Under favourable development conditions any kind of monogeneаs may cause mass diseases and even death of fish. The main goal of the given paper is to study infection dynamics of younger age groups of Dactylogyrus hypophthalmichthys silver carp under the conditions of the Lower Volga fish farms. Silver carp younger age groups were used as a material for this research. Invasion extensity was 100 % during the whole observation period. Two cases of irruption were traced during the observations in May and September. Together with maximum values, two minimum values of parasite population level were observed in March and June.