Some histological violations of gonad at Perccottus glenii (Dibowski, 1877) and neogobius melanostomus (Pallas, 1814) of Saratov reservoir

The results of research of the histological state of gonad of fishes are presented two invaziynykh types of the Saratov storage pool Neogobius melanostomus (Pallas, 1814) and Perccottus glenii (Dibowski, 1877). Description over of pathologies of gametes and other histological violations, discovered for fishes of these kinds in the district of research, and loud speaker of met of individuals is brought with the described anomalies. Possibility of the use of histological indexes of fishes is explained for the estimation of the ecological state of reservoir.