EN
The level of globulins, total protein and globulin index (albumin globulin ratio) was estimated in sera of healthy carps aged from 2 months to 5 years. The content of globulins increased along with the ontogeny of the fish. The highest level of globulins was found in 29-month-old individuals, the lowest in 10-month-old ones. Among spawnings a greater concentration of globulins was noted in milters. The dynamics of total protein changes showed the same pattern as globulins but differences in the total protein content between the groups of carps were more pronounced. The globulin index was constant irrespectively of age, body weight and sex of fish.