Using an intermittent respirometer, we measured the thermal sensitivity (metabolic Q₁₀) and scaling relationship (b) of the round stingray, Urobatis halleri, based on their standard metabolic rates (SMR). A total of 33 individuals (mass range = 0.03–0.86 kg) were acclimated for over 14 days at three temperature treatments (15°, 23°, 27 °C) spanning the seasonal water temperature variation in southern California. An average thermal sensitivity (Q₁₀) of 3.1 was estimated for the round stingray across the range of experimental temperatures. Estimations of size dependent Q₁₀ was 3.8 in juveniles while 2.6 in adults. Our model showed a negative relationship between this species mass-specific scaling exponent (b) and temperature (b = 0.99 at 15 °C, b = 0.86 at 23 °C, and b = 0.79 at 27 °C). Results indicate that the round stingray is relatively sensitive to the thermal fluctuations they experience in southern California. While adults with a relatively high metabolic Q₁₀ may optimize their daily net energy gain by exploiting the local thermal heterogeneity, a higher thermal sensitivity in juveniles could have adverse effects on the population fitness under a pervasive increase of ocean's temperature. Given that the scaling exponent can be affected by temperature, modeling studies should consider correcting for this effect when using scaling relationships as an input for more precise bioenergetic models under various thermal scenarios.

使用间歇性呼吸计，我们根据标准代谢率（SMR）测量了圆形黄貂鱼Urobatis halleri的热敏感性（代谢Q ₁₀）和比例关系（b）。在横跨加利福尼亚南部季节性水温变化的三种温度处理（15°，23°，27°C）下，总共33个人（质量范围= 0.03-0.86 kg）适应了14天。在整个实验温度范围内，圆形黄貂鱼的平均热灵敏度（Q ₁₀）估计为3.1。大小依赖的Q ₁₀估计值在青少年中为3.8，而在成年人中为2.6。我们的模型显示了该物种的质量特定比例指数（b）和温度（b  = 0.99在15℃，b  = 0.86在23℃，和b  = 0.79在27℃下）。结果表明，圆形黄貂鱼对他们在加利福尼亚南部遇到的热波动相对敏感。而成年人的代谢Q ₁₀相对较高可能会通过利用局部热非均质性来优化其每日净能量获取，在海洋温度普遍升高的情况下，少年的较高热敏性可能会对种群适应性产生不利影响。鉴于缩放指数可能受温度影响，因此在将缩放关系用作各种热场景下更精确的生物能模型的输入时，建模研究应考虑对此效应进行校正。