title: [Heat production in the ground squirrel Citellus pygmaeus during arousal from hibernation].
abstract: Heat production has been both measured experimentally (Qcal) and calculated from oxygen consumption (QO2) in arousing ground squirrels during the rise of their body temperature. Studies were made on total heat production during all the period of their warming as well as on the heat production at various stages of arousal. Qcal was evaluated by changes in body temperature and those in heat losses via convection and irradiation (calorimetrically). During arousal of animals, their body temperature, heat losses, Qcal and QO2 Gradually increase. However, the increase in heat losses is 3-4 times lower as compared to the intrinsic heat production measured both calorimetrically and by oxygen consumption. Limitation of heat losses (due to the constriction of subcutaneous blood vessels) together with activation of the metabolism in muscles and other tissues provide for significant heat accumulation and the increase in body temperature of arousing ground squirrels.
mesh_terms: D000818:Animals; D001143:Arousal; D001831:Body Temperature; D001833:Body Temperature Regulation; D002151:Calorimetry; D006605:Hibernation; D010101:Oxygen Consumption; D012377:Rodentia / Q000502:physiology*; D012589:Sciuridae / Q000502:physiology*
vernacular_title: Obrazovanie tepla v organizme suslikov Citellus pygmaeus pri probuzhdenii otzimneĭ spiachki