Energy metabolism and thermoregulation in reindeer during early postnatal development

The interrelations of body weight, energy metabolism, and physiological parameters in the early postnatal development of reindeer are analyzed. It is shown that the dependence of energy expenditure at rest and oxygen utilization coefficient on body weight is described by a parabolic equation of the second order. At high ambient temperatures during the summer season, energy metabolism in the young decreases, heat emission by respiration increases, and the temperature homeostasis is disturbed.