Temperature is one of the most influential drivers of physiological performance and behaviour in ectotherms, determining how these animals relate to their ecosystems and their ability to succeed in particular habitats. Here, we analysed the largest set of acceleration data compiled to date for elasmobranchs to examine the relationship between volitional activity and temperature in 252 individuals from 8 species. We calculated activation energies for the thermal performance response in each species and estimated optimum temperatures using an Arrhenius breakpoint analysis, subsequently fitting thermal performance curves to the activity data. Juveniles living in confined nursery habitats not only spent substantially more time above their optimum temperature and at the upper limits of their performance breadths compared to larger, less site-restricted animals, but also showed lower activation energies and broader performance curves. Species or life stages occupying confined habitats featured more generalist behavioural responses to temperature change, whereas wider ranging elasmobranchs were characterised by more specialist behavioural responses. The relationships between the estimated performance regimes and environmental temperature limits suggest that animals in confined habitats, including many juvenile elasmobranchs within nursery habitats, are likely to experience a reduction of performance under a warming climate, although their flatter thermal response will likely dampen this impact. The effect of warming on less site-restricted species is difficult to forecast since three of four species studied here did not reach their optimum temperature in the wild, although their specialist performance characteristics may indicate a more rapid decline should optimum temperatures be exceeded.

中文翻译：

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自由放养的弹性分支的热力性能响应取决于栖息地的使用和体型。

温度是影响等温线生理性能和行为的最重要驱动因素之一，决定了这些动物与生态系统的关系以及它们在特定生境中成功的能力。在这里，我们分析了迄今为止为弹性分支编制的最大加速度数据集，以检查8种物种的252个个体的自主活动与温度之间的关系。我们使用Arrhenius断点分析计算了每个物种的热性能响应的活化能，并估计了最佳温度，随后将热性能曲线拟合到了活动数据。与较大的苗圃相比，生活在狭窄苗圃栖息地中的幼虫不仅在其最佳温度以上以及在其活动幅度的上限上花费了更多的时间，位置受限的动物更少，但活化能更低，性能曲线更宽。居住在狭窄栖息地中的物种或生命阶段表现出对温度变化的更广泛的行为响应，而范围更广的弹性分支的特征在于更专业的行为响应。估计的性能状况与环境温度限制之间的关系表明，在狭窄的栖息地中的动物，包括在苗圃栖息地中的许多少年弹性分支，在变暖的气候下可能会降低性能，尽管它们较平坦的热响应可能会减弱这种影响。由于这里研究的4个物种中有3个在野外未达到最佳温度，因此很难预测变暖对限制地点较少的物种的影响。