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HEAVY METALS CONTENT IN A SMALL RIVER COMPONENTS WITHOUT ANTHROPOGENIC INFLUENCE

The article presents the results of the analysis of surface waters, bottom sediments and muscles of the silver carp (Carassius auratus gibelio) from the upper reaches of the Olgokhta River. The results of laboratory studies have shown that the content of nutrients (NH4+, NO3-, NO2-, PO43-) in the river water does not exceed the maximum permissible values.Heavy metals (Fe, Mn, Zn, Pb, Cu and Ni) in river water, with the exception of iron and manganese, are within the MPC. The high concentrations of Fe and Mn are explained by the peculiarity of the Burein geochemical province. The increased zinc content in bottom sediments is explained by the increased geochemical activity of this metal. The content of heavy metals in the muscles of carp compared to other rivers in Russia is one of the lowest. Presumably, zinc and iron accumulate most in the muscles. The data obtained on the composition and quality of water, bottom sediments, as well as the concentration of metals in the muscles of the silver carp can be considered background for the region due to the absence of anthropogenic load on the watercourse.