Blood serum components as an indicator of the health status of herbivorous fish

The results of studies of total protein and its fractions, as well as aminotransferases of blood serum of pond herbivorous fish are presented. Studies allow us to assess the activity of aminotransferases (alanine and aspartate aminotransferases), the activity of which in the blood serum somehow characterizes the condition and /or degree of damage to some organs of fish. Seasonal and age dynamics, as well as sex differences of the studied parameters in fish, have been established. Sex differences in these indicators are most noticeable in fish aged 0+ to 2 years. The data obtained allow us to judge the specific protein status, which differs in species characteristics and variability depending on the habitat conditions of fish, which gives an idea of the level of the physiological state of fish when grown in modern fish farms, and also allows us to assess the quality of the environment surrounding fish.