Decreased basal thermogenesis is associated with the downregulation of cellular metabolic activity of organs and serum thyroid hormones in fasting Eurasian Tree Sparrows (Passer montanus)
Food is a critical environmental factor that influences animal survival, especially for small passerines due to their high mass-specific metabolic rates.Basal metabolic rate (BMR) reflects the energy expended by endothermic animals Twin Set for basic physiological processes and constitutes a major part of their daily energy budget.Some birds have b