Temperature and Energy Characteristics of the Sagebrush Lizard (Sceloporus graciosus) in Yellowstone National Park
Temperature and Energy Characteristics of the Sagebrush Lizard (Sceloporus graciosus) in Yellowstone National Park
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DOI：
10.2307/1441705
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发表时间：
1969-03
期刊：
影响因子：
2.6
通讯作者：
C. F. Mueller
中科院分区：
文献类型：
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作者：
C. F. Mueller
田间 41 只 Sceloporus graciosus 的平均泄殖腔温度为 30.9*C。距地面一英寸的平均气温 (23.7*C) 和平均基质温度 (25.7*C) 均显着低于平均泄殖腔温度。 1966 年在实验室温度梯度（N 分别为 58、70 和 60）下测量的蜥蜴春季、夏季和秋季离散样本的平均泄殖腔温度彼此之间存在显着差异，春季样本的平均值最低（28.9*C），夏季样本的平均值最高（32.3*C）。 1965 年 8 月收集的 14 只蜥蜴样本的平均临界最高温度明显高于 1966 年 6 月收集的 10 只蜥蜴样本的平均临界最高温度（43.6 与 42.6*C）。虽然 1966 年收集的三个样本的平均临界热最大值彼此之间没有显着差异，但它们以及从热梯度样本中获得的平均温度遵循一般的季节性温度趋势。使用 Warburg 仪器在 30*C 下测量的耗氧量约为大多数蜥蜴物种指示值的 30%。 1966 年 9 月 7 日，幼年蜥蜴和年老蜥蜴的平均脂肪储存量约为总干重的 23%。根据耗氧量和脂肪损失的估算，成年蜥蜴在 220 天的冬眠期间会产生 2000-2800 卡路里的热量。
The mean cloacal temperature for 41 Sceloporus graciosus in the field was 30.9*C. Both the mean air temperature one inch above the ground (23.7*C) and the mean substratum temperature (25.7*C) were significantly lower than the mean cloacal temperature. The mean cloacal temperatures of discrete spring, summer, and fall samples of lizards collected in 1966 measured in a laboratory temperature gradient (N = 58, 70 and 60 respectively), differed significantly from each other, with the spring sample having the lowest mean (28.9*C) and the summer sample the highest (32.3*C). The mean critical thermal maximum of a sample of 14 lizards collected August 1965, was significantly higher than the mean critical thermal maximum of a sample of 10 lizards collected in June 1966 (43.6 vs 42.6*C). While the mean critical thermal maxima of three samples collected in 1966 were not significantly different from each other, they, as well as the mean temperatures obtained from the samples in the thermal gradient, followed the general seasonal trend in temperatures. Oxygen consumption measured at 30*C with a Warburg apparatus was approximately 30% of the value indicated for most species of lizards. Mean fat storage on 7 September 1966, was approximately 23% of the total dry body weight for both juvenile and older lizards. Using estimates from oxygen consumption and fat loss, an adult lizard produces 2000-2800 cal during a hibernation period of 220 days.