Reptiles rely on thermal heat exchange to achieve body temperatures (T_body) conducive to maintaining homeostasis. Diurnal changes in the thermal environment are therefore liable to influence allostatic mediation of survival processes (e.g., immunity) during environmental challenges or stressors. However, the extent to which T_body prompts individual variation in physiology remains largely unexplored in reptiles. Our study tested how circulating energy‐mobilizing hormone, energy metabolites, and immunity can vary across basal and stress‐induced allostatic states for plateau side‐blotched lizards (Uta stansburiana uniformis) residing in a heterogeneous thermal environment. We collected baseline and acute stress blood samples from male lizards to compare changes in plasma corticosterone (CORT), glucose, and bacterial killing ability (BKA) in relation to each other and T_body. We hypothesized each physiological parameter differs between allostatic states, whereby stress‐induced activity increases from baseline. At basal and stress‐induced states, we also hypothesized circulating CORT, glucose, and BKA directly correspond with each other and T_body. We found both CORT and BKA increased while glucose instead decreased from acute stress. At basal and stress‐induced allostatic states, we found CORT to be directly related to T_body while BKA was inversely related to CORT. We also found BKA and glucose were directly related at baseline, but inversely related following acute stress. Overall, these results demonstrate allostatic outcomes from acute stress in a free‐living reptile and the role of temperature in mediating energetic state and immunity. Future research on reptilian allostasis should consider multiple environmental conditions and their implications for physiological performance and survival.

中文翻译：

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糖皮质激素，能量代谢物和免疫力在异源热环境中的高原侧斑点蜥蜴（Uta stansburiana Unidis）的同种异体状态之间变化。

爬行动物依靠热交换来达到有利于维持体内稳态的体温（T _body）。因此，在环境挑战或压力下，热环境的昼夜变化容易影响生存过程的同构介导作用（例如免疫力）。但是，在爬行动物中，T_体在多大程度上促使生理发生个体变化，目前尚无定论。我们的研究测试了高原侧斑蜥蜴（Uta stansburiana统一体）的循环能量动员激素，能量代谢物和免疫力在基础和应激诱导的同种异体状态之间如何变化）存在于异构热环境中。我们收集了雄性蜥蜴的基线和急性应激血液样本，以比较血浆皮质酮（CORT），葡萄糖和细菌杀伤能力（BKA）相对于彼此和T_体的变化。我们假设每个生理参数在不同的静态状态下都不同，从而应力诱导的活动从基线开始增加。在基础状态和压力诱导状态下，我们还假设循环CORT，葡萄糖和BKA与T_体彼此直接对应。我们发现CORT和BKA均升高，而葡萄糖却因急性应激而降低。在基础和压力诱导的同种异体状态下，我们发现CORT与T_体直接相关而BKA与CORT成反比。我们还发现，BKA和葡萄糖在基线时直接相关，但在急性应激后却呈负相关。总的来说，这些结果证明了自由爬行动物在急性应激中的同素异形结果，以及温度在调节精力充沛状态和免疫力中的作用。未来关于爬行动物同种异体的研究应考虑多种环境条件及其对生理性能和生存的影响。