Seasonal dynamics of the structure of intestinal helminth community in ide (Leuciscus idus L.) from the Rybinsk reservoir

The communities of intestinal helminths found in the "winter" sample of ide (December-May, 45 fish) and in the "summer" sample (August-September, 42 fish) were compared. They consisted of 10 and 11 species, respectively, with Sphaerostomum globiporum being dominant in both communities. The species Parasymphylodora markewitschi and Capillaria tomentosa were found only in the "summer" community. Dominance and diversity (the Simpson and Brillouin indices) in the "winter" community were higher. All helminth species in the intestinal community of ide were of broad specificity. Therefore, host specialization does not play an important role in the forming of intestinal helminth community in this fish species.