Radiocological Study of the Lake Frog Pelophylax ridibundus in the Lakes Alabuga and Kuyash

The accumulation levels of long-lived radionuclides ⁹⁰Sr and ¹³⁷Cs in the marsh frog Pelophylax ridibundus Pall., 1771 inhabiting the lakes Alabuga and Kuyash located in the peripheral zone of the East Ural Radioactive Trace (EURT) were studied. It was shown that the concentration of ⁹⁰Sr in the frogs of Lake Alabuga varies from 50 to 200 Bq/kg, and in Lake Kuyash — from 100 to 320 Bq/kg of dry weight of animals. The content of ¹³⁷Cs in the frogs of Lakes Alabuga and Kuyash varies from 5 to 35 and from 35 to 145 Bq/kg of dry weight, respectively. A comparison was made of the concentration levels of the studied radionuclides in the same type of components of the studied lakes in the EURT territory and water bodies of the Middle Urals. It has been shown that the content of ⁹⁰Sr in frogs from lakes Alabuga and Kuyash, calculated on a wet body weight basis, does not exceed the intervention level for fish according to the accepted standards (SanPiN of 15.04.2003).

Lake frog, lakes Alabuga and Kuyash, radionuclides ⁹⁰Sr and ¹³⁷Cs, concentrations, components of the reservoir