HELMINTHOFAUNA OF PIKE OF THE MIDDLE CURRENT OF THE YENISEI RIVER
The consequence of anthropogenic impact is the change in the ichthyofauna of the Yenisei river, the species composition of fish helminths changes. The aim of the research is to study the helminth fauna of pike in the middle current of the river Yenisei on the territory of the Central Siberian reserve in summer. Partial parasitological dissection was used to study the composition of pike helminths in the Yenisei river. 78.6% of the fish were infected. 5 types of helminths of the pike digestive tract were identified. Species-specific helminths of pike are Azygia lucii and Raphidascaris acus . The infection rate of A. lucii pike increased by 10%, but the infection rate of Triaenophorus nodulosus decreased significantly. Only in the Yenisei river the cestode Triaenophorus crassus was found. Acanthocephalus sp. was registered for the first time in pike and the infectious disease pseudomonosis was found in the Yenisei river.