ACTIVITY OF IMMUNITY T-SYSTEM IN 2-YEAR OLD LUBIN FRAME CARPS AND AMUR WILD CARPS AND THEIR HYBRID FORMS GROWN AT DIFFERENT STOCKING DENSITY

There are presented data on quantity of separate populations of T- and quantity of B-lymphocytes in blood of 2-year old Lubin frame carps and Amur wild carps and their hybrid forms grown at stocking density of 2500 and 1000 fish/ha. Differences in quantity of T- and B-lymphocytes and their activity in fish of studied genotypes are insignificant. It was found a significantly higher quantity of T-lymphocytes and lower quantity of B-lymphocytes in blood of fish of all genotypes grown at lower stocking density.