The effect of zinc on hematological parameters of carp

The article considers the influence of different maximum permissible concentrations (10, 100, 1000, 10000) of zinc on some hematological parameters (ESR, MSH, hematocrit, hemoglobin, number of red blood cells) of carp. The study found a decrease in hemoglobin concentration in the blood of carp compared with the control group by 3.76-10.54 %, depending on the studied zinc concentration. The study of the number of red blood cells in the blood of carp revealed a decrease in the index from 2.22 % to 24.51%, proportional to the increase in the concentration of the toxicant. The rate of erythrocyte sedimentation as a result of zinc exposure increased by 0.83-51.67 % relative to the control group depending on the zinc concentration. There was a tendency to decrease hematocrit by 3.33 % under the influence of zinc acetate. The study showed an increase in hemoglobin content in the erythrocyte to 18.51 % compared with the control group. The calculated hematological parameters reflected the physiological state of the fish, indicating the initial stages of toxicosis.