Features of osmotic resistance of erythrocytes and hemoglobin content in the blood of fish under the action of ferum (iii)

The osmotic resistance of erythrocytes and the content of hemoglobin in the blood of carp (Cyprinus carpio L.) and pike (Esox lucius L.) under the action of Fe3+ ions at concentrations of 0.2 and 0.5 mg/dm3, were under study which corresponded to 2 and 5 maximum permissible concentration (MPC). The research demonstrated that increased concentrations of Fe3+ ions lead to changes in the osmotic resistance of erythrocytes and the content of hemoglobin in the blood of carp and pike. The findings suggest that high concentrations of Iron (5 MPC) in carp lead to a decrease in the resistance of erythrocyte membranes, and in pike it led to increased osmotic resistance of erythrocytes, which is apparently due to different mechanisms of adaptation of fish erythrocyte membranes to adverse aquatic environment. Species-specificity is also characterized by changes in the content of hemoglobin in the blood of fish species which were researched. An increased amount of pigment in the blood of carp and a decreased amount of hemoglobin in pike under the action of 5 MPC of metal ions was established. The obtained results can be used to assess the physiological condition of fish and water quality under conditions of contamination of watercourses with metals.