Seasonal dynamics of fauna of parasites invading species of reservoirs of the Volga region of Amur sleeper of Perccottus glenii (Actinopterygii: Odontobutidae)

Original data on contamination Amur sleeper by Perccottus glenii Dybowski, 1877 are provided in one of inundated lakes of the Saratov reservoir – the lake Lesnoe (Krugloe). The functional role of this invading species in life cycles of native and alien species of parasites is defined. Changes of qualitative and quantitative structure of fauna of parasites depending on a season of year are revealed.