New data on the distribution of the invader leech species Archaeobdella esmonti (Clitellata: Hirudinida) in the Kuybyshev Reservoir

Abstract

An invader leech species Archaeobdella esmonti (Clitellata: Hirudinida) was found during hydrobiological research in 2016 in the Volga and Volga-Kama reaches of the Kuybyshev Reservoir. This indicates the continuing process of spreading of this alien leech species in the Kuybyshev Reservoir and the colonization of new habitats on a considerable area of the upstream part of the reservoir. The article describes the occurrence and quantitative abundance of A. esmonti in the studied water area.