The Asian house gecko (Hemidactylus frenatus) is a tropical invasive species that has established and spread throughout several temperate regions around the world. In some invasive species, rapid thermal acclimation (thermal hardening) may contribute to their success in occupying a wide range of climates. In this study, we investigated whether invasive house geckos from southeastern Australia show differing thermal hardening responses than individuals from the native range in Thailand. In the laboratory, we measured the basal heat tolerance (CT_max) of the geckos and their heat hardening response after being subjected to the second thermal stress after 1, 3, 5, 7, 9, or 11 h. When geckos had recovered, we measured their basal cold tolerance (CT_min) and cold hardening response over the same time intervals. We then explored whether hardening responses differed between populations or among time intervals. We found that basal heat tolerances did not differ between populations, but geckos from Australia had lower cold tolerance than geckos from Thailand. The magnitude of the heat hardening was similar between populations, but the introduced geckos had a higher magnitude of cold hardening. The native geckos could maximize their cold tolerance capacity for only 0.6 °C, versus 0.9 °C for the introduced geckos. Also, geckos from Australia exhibited faster responses to thermal stress than did geckos from Thailand. Maximum thermal tolerances as a result of hardening responses peaked within three hours after thermal stress in Australian geckos (adjusted means = 44.0 °C for CT_max and 9.9 °C for CT_min) and at five hours after thermal stress in Thailand geckos (adjusted means = 44.2 °C and 10.2 °C, respectively). The plasticity in the thermal hardening of the invasive gecko should enable it to survive rapid temperature fluctuations, especially winter cold snaps that occur in temperate regions.

亚洲壁虎（Hemidactylus frenatus）是一种热带入侵物种，已在世界几个温带地区建立并传播。在某些入侵物种中，快速的热适应（热硬化）可能有助于它们成功地适应各种气候。在这项研究中，我们调查了来自澳大利亚东南部的侵入性壁虎是否表现出与来自泰国本土的壁虎不同的热硬化响应。在实验室中，我们测量了壁虎的基础耐热性（CT _max）及其在经过1、3、5、7、9或11小时后的第二次热应力后的热硬化响应。壁虎恢复后，我们测量了它们的基础耐寒性（CT_分钟）和相同时间间隔内的冷硬化响应。然后，我们研究了群体之间或时间间隔之间的强化反应是否有所不同。我们发现不同种群之间的基础耐热性没有差异，但是来自澳大利亚的壁虎的耐寒性低于来自泰国的壁虎。种群之间的热硬化程度相似，但是引入的壁虎的冷硬化程度更高。原生壁虎仅在0.6°C时就可以最大化其耐寒能力，而引入的壁虎则为0.9°C。而且，来自澳大利亚的壁虎对热应激的反应比来自泰国的壁虎要快。在澳大利亚壁虎中，由于硬化反应在热应力后三小时内达到峰值，因此具有最大的热耐受性（CT的均值= 44.0°C）_最高温度和9.9°C的CT_最小温度）以及泰国壁虎的热应力后五个小时（分别为44.2°C和10.2°C的均值）。侵入性壁虎的热硬化过程中的可塑性应使其能够经受住快速的温度波动，尤其是在温带地区发生的冬季寒冷。