Sleep, Hypometabolism, and Torpor in Birds

摘要: Endothermy is energetically expensive, yet it has enabled birds and mammals to exploit a wide variety of extreme habitats where energy demands are high food frequently scarce. Increased demand coupled with decreased opportunity feed may occur on daily or seasonal basis. It not surprising, therefore, that endotherms have evolved adaptations reduce expenditure time scales. The oldest most ubiquitous these be sleep. argument been advanced specifically slow wave sleep, (SWS), also known as non-rapid eye movement (NREM) sleep in parallel endothermy means reducing during the portion day animals were inactive (Walker & Berger, 1980). More forms adaptive hypometabolism, shallow, torpor, deep hibernation, from general mammalian avian phenomenon (Heller et al, 1978).