Behavioral fight responses to desiccation risk are important to predict the vulnerability of terrestrial animals to climate change and yet, they have received little attention so far. In terrestrial ectotherms, behavioral regulation of the water balance (i.e. hydroregulation) is likely to be plastic and may tradeoff with thermoregulation behavior because water loss rates are generally higher in warmer environments and body temperatures. When low water availability and heat stress cause physiological dehydration, we expect to highlight a shift to behavioral water‐conservation strategies including changes in activity patterns, micro‐habitat selection and thermoregulation strategies. Here, we compared the behavior of adult common lizards Zootoca vivipara in indoor arenas that either had a permanent access to water or underwent a one‐week long experimental water restriction. Water‐restricted lizards reduced their behavioral activity, selected more often cooler and wetter refuges during daytime, and performed less accurate thermoregulation than control lizards. The activity of water‐restricted gravid females shifted towards the cooler and wetter early hours of the day. In addition, they had lower body temperatures and preferred lower body temperatures at the end of the experiment (i.e. thermal depression). Water‐restricted lizards suffered from a mild physiological dehydration and had a lower mass change. Heat stress was simulated every second day, which led to a range of heat avoidance and water conservation strategies independent from water restriction. Altogether, these results confirm that chronic water restriction and dehydration induce responses towards water conservation that conflict with thermoregulation accuracy.

中文翻译：

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水分限制会引起行为争斗，但会损害干皮外热中的温度调节

对干燥风险的行为斗争反应对于预测陆生动物对气候变化的脆弱性很重要，但是到目前为止，它们鲜有受到关注。在陆地等温线中，水平衡的行为调节（即水调节）很可能是可塑性的，并且可能会与温度调节行为进行权衡，因为在温暖的环境和体温下失水率通常较高。当缺水和热应激导致生理性脱水时，我们期望着重强调行为节水策略的转变，包括活动模式的改变，微生境的选择和温度调节策略。在这里，我们比较了成年普通蜥蜴Zootoca vivipara的行为在室内永久供水或经历了为期一周的实验用水限制的室内竞技场。限水蜥蜴减少了其行为活动，白天选择更凉爽和潮湿的庇护所，并且执行的温度调节比对照蜥蜴要低。水分受限的妊娠雌性的活动在一天的早些时候转向凉爽和潮湿的地方。另外，在实验结束时（即热压），它们的体温较低，优选为较低的体温。限水蜥蜴患有轻度的生理性脱水并且质量变化较小。每隔两天模拟一次热应力，从而产生了一系列与水限制无关的避免热量和节水策略。共，