Linear threshold effects of gamma-irradiation of the terrestrial mollusk F. fruticum M. of the third age group

The ecocentric strategy of radiation protection involves the expansion experimental bases radiation-induced effects in representatives biota. In this article we studied change relevant indicator (mortality) terrestrial mollusk F. fruticum M. after gamma-irradiation with doses from 10 to 300 Gy. is not yet included list reference species, but it meets requirements ICRP for organisms. aim work establish dose-effect relationships study mortality third age group acute -irradiation used expand databases on radio-induced results a mollusks only are presented. This research part an experiment identify age-related features radiosensitivity representative malacofauna. was determined by number revolutions shell. conditions keeping animals laboratory were selected such way that control remained at zero during entire experiment. duration 210 days. LD50/60 index estimated calculated probit analysis method using least squares method. 141.4+/-26.3 every 30 days irradiation. A linear threshold dependence established each time range, starting 60 It contains two transitions new level and, accordingly, three dose ranges: dose-independent range low radiation, dose-dependent increase and plateau when switching absolute lethality. Four ranges irradiation: 10-130 Gy (100% survival rate), 140-160 (absolute 180 days), 170-190 150 200-300 90 days). At same time, greatest dynamics observed first