Archives → 2019 → Vol. 59, No. 3 → pp. 321-328
Article
Size Dependent Accumulation of Radiocesium (137Cs) in Muscles and Bodiesof Northern Pike (Esox lucius) in the Yenisei River
Zotina T.A.1,2, Trofimova E.A.1, Dementyev D.V.1
1Institute of Biophysics, Federal Research Centre Krasnoyarsk Scientific Centre, Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, Russia 2Siberian Federal University, Institute of Fundamental Biology and Biotechnology, Krasnoyarsk, Russia
Abstract
Size dependent concentration of radiocesium (137Cs) and 40K in muscles and bodies of the Northern pike (Esox lucius) inhabiting radioactively contaminated part of the Yenisei River was investigated in 2010–2016. Concentrations of radionuclides in fish samples were measured with a gamma-spectrometer with Ge-detector, concentrations of potassium – with a flame photometer. Forty seven fish with the fresh weight (W) ran-ging from 90 to 1651 g were analyzed. Activity concentrations of radiocesium in muscles and bodies of the pike were 0.13–7.02 and 0.12–7.24 Bq/kg w.w., respectively, and inversely depended on the fish size. Highest activity concentrations of radiocesium were registered in muscles and bodies of the fish with the body weight up to 530 g and age up to 5 y. Correlation analyses revealed a significant negative dependence of the radiocesium content in bodies of the pike with the total weight (W) and the length of the fish (L). A higher concentration of radiocesium can be explained by more intensive feeding of young fish than that of old ones. A significant decrease of the radiocesium content in muscles and bodies of the pike with time was revealed.
Keywords
northern pike, technogenic radionuclides, negative size effect, concentration factor
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