Comparative characteristics of leucocytes compositions in the crucian carp Carassius carassius (Cyprinidae) from the waterbodies of the Chernobyl exclusion zone and from the Rybinsk reservoir

The comparative characteristics of leucocytes of the crucian carp Carassius carassius inhabiting the waterbodies of the Chernobyl exclusion zone (Kyiv oblast, Ukraine) and outside the zone in the upper nonpolluted areas of the Kyiv (Kyiv and Chernigov oblasts, Ukraine) and the Rybinsk reservoirs (Yaroslavl oblast, Russian Federation) is given. The composition and quantitative parameters of certain types of leucocytes are presented. It is shown that the crucian carp from the Chernobyl exclusion zone differs from that inhabiting the noncontaminated waterbodies by the level of lymphocytes, neutrophils and eosinophils, and blast cells. It is suggested that the radioactive contamination affects the processes of differentiation of stem hematopoietic cells in fish.