Demtsun N. Seasonal differences in the planaria Dugesia tigrina regeneration in electromagnetic shielding

The thesis is devoted to studying the biological effect of electromagnetic shielding of varying term on the regenerating Dugesia tigrina. It is shown the intact planarians regeneration most intense in summer, least intensive - in winter. Regeneration index values and planarian's speed were higher in spring and autumn than in winter, but lower than in the summer. Spectral analysis revealed infradian rhythmics set of studied parameters, which includes such periods: 2d,13; 2d,46; 2d,66; 3d,20; 4d,00; 4d,57; 6d,40. However, infradian rhythmic of intact animals is varied in different seasons. Electromagnetic shielding changes parameters of planarians regeneration, and extent of these changes depends on duration of shielding and the season. Thus, long-term electromagnetic shielding stimulates regenerative processes and increases the speed of movement. The most expressed stimulation occurs in winter, least in summer. There is a tendency to stimulate regeneration and parameters most significantly changes in the spring. Short-term electromagnetic shielding has led to insignificant changes of regenerative processes in the cephalic end of the planarians body, which occurred as a tendency, but considerably changed the infradian rhythmic parameters of studied indices.