The fauna of helmingths of bleaks Alburnus alburnusa alburnus (Linnaeus, 1758) Saratov reservoir

We present original data on the helminth infestation of bleaks there are are virtually in the Saratov reservoir. Detected parasites, pathogenic for fish, carnivorous mammals, is not excluded human infection. Parasitological analysis showed that the reservoir of the conditions are most favorable for the development of benthic organisms that contributed to the transition of bleaks there are are virtually planktonic to benthic feeding. Changes of the helminth fauna of bleaks there are are virtually occurred over a long period of time, indicate the presence of changes in the biocenosis of the reservoir, the cause of which in particular is naturalization in the reservoir of alien aquatic species (molluscs, parasites).