The concept of ”conditional or reference animals and plants” proposed by the ICRP is the most developed in the development of an ecocentric radiation protection strategy. At the same time, the set of 12 reference species proposed by the ICRP is not final, which requires justification of other representatives of the biota for inclusion in the reference set, including taking into account the formation of dose loads and radiationinduced effects. In this work it was estimated the effect of irradiation of land mollusks of the species Bradybaena fruticum with the radionuclide Sr-90 on the morphometric parameters of shellfish (height and diameter of the shell) and the level of proteins of metallothioneins in the field experiment. The absorbed dose rate of the mollusk was calculated using the Monte Carlo method (taking into account the scenario of self-irradiation, irradiation from Sr-90 accumulated in the soil and accumulated in the nettle). In the range of doses studied it was established reliable radiation-induced change in the height of shell and the level of proteins metallothioneins in the soft bodies of a mollusk of the species Bradybaena fruticum.
Keywords: mollusc of the species Bradybaena fruticum, absorbed dose rate, height of shell, diameter of shell, proteins of metallothioneins