Abstract
Blood of fish is a highly sensitive system that quickly responds to the effects of toxins and other stress factors of abiotic and biotic nature. Among the various pathologies of fish blood the formation of micronuclei and anomalies of the nucleus of erythrocytes are distinguished, which can act as markers of the stability of the genome of aquatic life. Therefore, this work presents a cytogenetic analysis of nuclear abnormalities in erythrocytes of common carp. In fish under investigation, erythrocytes with micronuclei, with a budding and bubbling nucleus, erythrocytes with a caudate filamentous and coracoid nucleus, and cells with a bilobed nucleus were detected. In the blood such types of nucleus anomalies as erythrocytes with a budding and bubbling nucleus prevailed, constituting 0.16 ± 0.031 and 0.28 ± 0.153%, respectively. The average total level of pathologies of the nucleus of erythrocytes in the studied carp was 0.89 ± 0.202%, which corresponded to the parameters of healthy fish.
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