Blem C R, Ragan C A, Scott L S
Comp Biochem Physiol A Comp Physiol. 1986;85(3):563-70. doi: 10.1016/0300-9629(86)90447-0.
Metabolic rates, temperature acclimation, lipid deposition and temperature tolerance were investigated in two species of hylid treefrogs, the green treefrog (Hyla cinerea) and the coastal plain (Cope's) gray treefrog (Hyla chrysoscelis). The rate of oxygen consumption at rest differed between the two species only at 30 degrees C; there was no difference in respiratory metabolism at lower ambient temperatures. Hyla cinerea generally completed metabolic acclimation earlier than H. chrysoscelis, particularly at high temperatures; both species appeared to be fully acclimated in 6 days or less. The gray treefrog is less tolerant of high ambient temperatures than the green treefrog; mean upper lethal temperature was 41.5 degrees C for Hyla chrysoscelis and 43.7 degrees C for H. cinerea. Metabolized energy was higher at high ambient temperatures (i.e. 29 degrees C) for H. chrysoscelis than H. cinerea, while the reverse was true at 19 degrees C. The coefficient of utilization (100 X metabolized energy/gross energy intake) did not vary significantly between species or within species over the ambient temperature range of 19-24 degrees C; H. chrysoscelis had a significantly higher efficiency at 29 degrees C. Lipid reserves were generally similar in the two species throughout the summer. Differences in behavior, seasonal variation in activity and timing of reproduction are all related to thermal physiology and may play a role in determining the distributional limits of the two species.
对两种雨蛙科树蛙——绿雨滨蛙（Hyla cinerea）和沿海平原（科普氏）灰树蛙（Hyla chrysoscelis）的代谢率、温度驯化、脂质沉积和温度耐受性进行了研究。仅在30摄氏度时，两种树蛙的静息耗氧率存在差异；在较低环境温度下，呼吸代谢没有差异。绿雨滨蛙通常比灰树蛙更早完成代谢驯化，尤其是在高温下；两种树蛙似乎都能在6天或更短时间内完全驯化。灰树蛙对高环境温度的耐受性低于绿雨滨蛙；灰树蛙的平均致死温度上限为41.5摄氏度，绿雨滨蛙为43.7摄氏度。在高环境温度（即29摄氏度）下，灰树蛙的代谢能量高于绿雨滨蛙，而在19摄氏度时则相反。在19至24摄氏度的环境温度范围内，两种树蛙之间以及同一树蛙种内的利用系数（100×代谢能量/总能量摄入）没有显著差异；在29摄氏度时，灰树蛙的效率显著更高。整个夏季，两种树蛙的脂质储备总体相似。行为差异、活动的季节性变化和繁殖时间都与热生理学有关，可能在决定两种树蛙的分布范围方面发挥作用。
