Infection with helmints of fishes river Taschelka (Kuibyshev reservoir)

Primary original data on contamination by helminths of fishes in the Tashelka River (The Kuibyshev reservoir) are obtained. Results of researches allow to draw a conclusion on existence in a reservoir of the conditions favorable for realization of life cycles of activators of the fishes parazitoz connected generally with fish-eating birds. The functional role of fishes in life cycles of the found parasites is defined. The absence of alien species (fish, parasites) indicates a significant delay or low speed of the process of introduction of alien species of aquatic organisms in the tributaries of the Kuibyshev reservoir of the first and second order.