[The effect of small radiation doses on biological changes in population groupings of murine rodents].

The influence of low doses of radiation on the biological changes in the population groupings of rodents is traced. Correlative dependence between the factors of accumulation of 137Cs by animals in contact with the forest litter and vital functions: intensity of reproduction, death of young animals (Sad) and size was found at the example of Clethrionomys glareolus Schreb. However, it is necessary to make amendments to the age structure of the grouping under analysis to use the mentioned above tests, as young animals accumulate nuclides in organism 375 or more times less than grown up ones. The factor of accumulation of radionuclides less than 1 can be accepted as the test of radiation-ecological well-being of the forest territory and this test can be used in radioecology.