CIRCAHORALIAN RHYTHMS OF BODY TEMPERATURE IN MAMMALSAND BIRDS WITH DIFFERENT METABOLISM LEVELS
The dynamics of intraperitoneal body temperature was analyzed in two species of mammals (laboratory C57Bl/6 mice and white-breasted hedgehogs (Erinaceus roumanicus) and in two species of passerine birds (Common Greenfinch Chloris chloris and Japanese quail Coturnix japonica) with different body weights. In the total body temperature spectra of the studied species the similar set of basic harmonics can be distinguished, which appear synchronously in different animals. The level of basal metabolism in these animal species varies greatly, therefore, the period of fluctuations in body temperature in the range of 10-120 min is not determined by the internal characteristics of an organism and, presumably, reflects the influence of an external biotropic environmental factor.