Use of Oxidative Stress (MDA) Markers and Cytogenetic Markers in the Ecological‐Genetic Monitoring of the Northern Caspian Sea

Abstract

Aim. Assessment and subsequent long‐term dynamic observation of possible negative genetic consequences of the effect of pollutants on certain units of metabolism are important tasks in ecological‐genetic monitoring. Cytogenetic and biochemical biomarkers are used in biomonitoring studies to analyze the genotoxicity of aquatic pollutants. The purpose of the work was to analyse the use of markers of oxidative stress and cytogenetic disorders in goby fish caught at shallow and deep‐water stations of the Northern Caspian Sea in the ecological‐genetic monitoring system. Material and Methods. The study was undertaken on 227 specimens of goby fish by cytogenetic and biochemical analysis. Results. The correlation dependence between erythrocytes with micronuclei and erythrocytes with the quantity of damaged nuclei summarized as R= ‐0.83 (p˂0.05) was shown. The results of correlation analysis between oxidative stress indices and the number of destructive changes in erythrocyte nucleus are presented. Our analysis thus leads us to the conclusion that somatic mutagenesis (micronuclear formation) after exposure to free radicals can be an adaptive response to this stress factor.Conclusion. Analysis leadsus to the conclusion that somatic mutagenesis (formation of micro‐nuclei) after exposure to free radicals can be an adaptive response to stress factor in habitat conditions in areas of liquidated prospecting wells of LUKOIL‐Nizhnevolzhskneft in the Northern Caspian Sea.

Keywords

• окислительный стресс
• перекисное окисление липидов
• малоновый диальдегид
• микроядра
• эритроциты