Agrarian
Bulletin
of the Urals

Russian Journal of Agricultural Research

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ISSN 2307-0005 (Online)
Key title: Agrarnyj vestnik Urala (Online)
Abbreviated key title: Agrar. vestn. Urala (Online)

Аграрный вестник Урала № 08 (126) 2014

Экология

Зиновьев Е. А.

Гилева Т.А. аспирант Пермский государственный национальный исследовательский университет

Костицына Н.В. кандидат биологических наук, доцент Пермский государственный национальный исследовательский университет

УДК:597+574.5

HEAVY METALS CONTENT IN ORGANS AND TISSUES OF FISH INHABITING DIFFERENT TYPE RESERVOIRS OF THE PERM REGION

Heavy metals are dangerous pollutants that are largely associated with the biological activity of many of them. They affect the fish organism in different ways depending on nature of the metal, type of its compound and its concentration. Heavy metals enter fish body through gills and digestive organs, less frequently through integument. Once in the body, metals-toxicants most often do not undergo any significant transformations, as it happens with organic substances, and having joined in biochemical cycle, they abandon it very slowly. This study considers the content of a number of heavy metals (Ni, Co, Cr, Mn, V, Ti, Cu, Zn, Pb, Sr) in water, soil, organs and tissues of gudgeon, perch and rotan of 9 reservoirs of the Perm region. Excess of permissible residual concentration and maximum permissible concentration for majority of studied metals was discovered. Moreover, excess of permissible residual concentration in organs and tissues of fish is greater than maximum permissible concentration in soil and water. Species specificity in accumulation of heavy metals is noted as the bottom-dwelling fishes accumulate more pollutants compared to the pelagic fishes. The accumulation of heavy metals reveals the following pattern: skeleton and scales contain more of the studied elements than liver and muscles. However, copper and lead in gudgeon are located to a greater extent in liver. Manganese, zinc and strontium have the highest concentrations in fish body, cobalt and chromium — the lowest ones.

Keywords:

gudgeon, perch, rotan, heavy metals, patterns of accumulation


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