LEUKOCYTES AND THROMBOCYTES OF PERIPHERAL BLOOD OF THE BLACK SEA-CASPIAN TYULKA (CLUPEONELLA CULTRIVENTRIS, NORDMANN 1840) OF THE IVANKOVO AND UGLICH RESERVOIRS

For the first time, the hematological parameters of tyulka (Clupeonella cultriventris, Nordmann, 1840) in the reservoirs of the Upper Volga were studied. The composition of leukocytes and thrombocytes, morphometric characteristics of cells were studied by routine methods of light microscopy. It was shown that blood of tyulka has a lymphocytic character, but an increase in the number of granulocytes and their size was found against the background of a decrease in the number of lymphocytes in tyulka a in the lower section of the Ivankovo ‒ the upper section of the Uglich reservoirs, which may indicate the presence of anthropogenic pressure. The proportion of thrombocytes was approximately three times higher than the proportion of leukocytes, which indicates a high blood clotting of the tyulka. Correlations between the characteristics of leukocytes and platelets and the content of basic cations and anions in water were studied.