Abstract
The results of the study of the content of malondialdehyde (MDA), reduced glutathione, the activity of glutathione reductase of hydrobionts for the identification of oxidative stress when exposed to the extract of bottom soils of the Northern Dvina River are presented. The tissues of the common whitefish (Coregonus lavaretus) selected as part of annual monitoring studies and samples of the test culture of the danio culture (Danio rerio) were used. The results revealed differences in the levels of markers in various whitefish tissues: the highest concentrations of markers were recorded in the liver. An experiment with a test culture showed an increase in oxidative stress when exposed to bottom soil extracts, manifested in a change in the levels of marker indicators in danio fish.
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