Non-Torpid Heterothermy in Mammals: Another Category along the Homeothermy–Hibernation Continuum
Non-Torpid Heterothermy in Mammals: Another Category along the Homeothermy–Hibernation Continuum
复制标题
哺乳动物的非迟钝异温性：恒温-冬眠连续体的另一个类别
DOI：
10.1093/icb/icad094
复制
发表时间：
2023
影响因子：
2.6
通讯作者：
Welman, Shaun
中科院分区：
文献类型：
--
作者：
Levesque, Danielle L.;Breit, Ana M.;Brown, Eric;Nowack, Julia;Welman, Shaun
体温的变化现在被认为在全身恒温动物中普遍存在，恒温动物是例外而不是常态。在现存的恒温动物中存在着广泛的体温模式，从严格的恒温到偶尔的冬眠，再到深度的季节性冬眠，中间有许多点。在讨论恒温动物的异温性时，人们常常忽略了冬眠之外体温变化的好处。不使用冬眠的恒温动物仍然可以通过不同程度的体温调节灵活性来节省大量的能量和水。在较高温度下的灵活性（蓄热或同时性热疗）可以提供显著的节水，而在较低温度下的减少，即使在冬眠之外，也可以降低休息时体温调节的能量成本。我们讨论了术语“异温性”、“耐热性”和“迟钝性”的不同用法，以描述体温周期幅度的差异，并主张更广泛地使用术语“异温性”来包括体温的非迟钝变化。
Variability in body temperature is now recognized to be widespread among whole-body endotherms with homeothermy being the exception rather than the norm. A wide range of body temperature patterns exists in extant endotherms, spanning from strict homeothermy, to occasional use of torpor, to deep seasonal hibernation with many points in between. What is often lost in discussions of heterothermy in endotherms are the benefits of variations in body temperature outside of torpor. Endotherms that do not use torpor can still obtain extensive energy and water savings from varying levels of flexibility in normothermic body temperature regulation. Flexibility at higher temperatures (heat storage or facultative hyperthermia) can provide significant water savings, while decreases at cooler temperatures, even outside of torpor, can lower the energetic costs of thermoregulation during rest. We discuss the varying uses of the terms heterothermy, thermolability, and torpor to describe differences in the amplitude of body temperature cycles and advocate for a broader use of the term “heterothermy” to include non-torpid variations in body temperature.