МАТЕРИАЛЫ К ФАУНЕ МНОГОКЛЕТОЧНЫХ ПАРАЗИТОВ PERCA FLUVIATILIS L. (ACTINOPTERYGII: PERCIFORMES) (САРАТОВСКОЕ ВОДОХРАНИЛИЩЕ)

Abstract

The fauna of multicellular parasites of Perca fl uviatilis (Peciformes) (2019, 2022) was studied at the site of the Saratov reservoir, located in the zone of infl uence of a large hydroelectric complex – the Zhigulevskaya HPP (a branch of PJSC RusHydro). 8 species of parasitic organisms were found. Infection of fi sh with alien parasites Apophallus muechlingi and Nicolla skrjabini was revealed. The trematode A. muechlingi, a specifi c parasite of Cyprinidae, occupied a dominant position in the perch macroparasite fauna. This process took no more than 19 years since the introduction of the alien mollusk Lithoglyphus naticoides, the fi rst intermediate host of the parasite. The possibility of participation of invasive fi sh in the process of P. fl uviatilis invasion by 5 parasite species is discussed. Species posing a potential danger to fi sh, carnivores and humans have been found. In particular, for the fi rst time for P. fl uviatilis in the Saratov reservoir, the acanthocephalan Pomphorhynchus laevis, the causative agent of fi sh pomphorhynchosis, was recorded.