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Thermographic Analysis of Body Surface Temperature of Mammals

机译：哺乳动物的体表温度的热成像分析

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摘要

Among mammals, the similarity in body temperature indicates that body size differences in heat loss must match the body size differences in heat production. This study tested the possibility that body surface temperature (Tbs), responsible for heat loss through radiation and convection, may vary systematically with the animal's body mass (M). Tbs was measured by whole body thermography in 53 specimens from 37 eutherian mammals ranging in M from a few grams to several tons. Numerous thermographs were taken from all angles, indoor, with the animals standing still in absence of air convection and of external radiant sources, at the ambient temperature of 20-22 degrees C, 22-25 degrees C, or 25-27 degrees C. Data were analysed as whole body surface average, as average of the "effective" body surface area (those regions with temperatures exceeding ambient temperature by > 1.5 degrees C or by > 5 degrees C), as the peak histogram distribution and as average of the regions with the top 20% temperature values. For all modes of data analysis and at all ambient temperatures Tbs was independent of the animal's M. From these data, the heat loss by radiation and natural convection combined was estimated to vary to the 2/3 power of M. It is concluded that, for the same ambient conditions, the surface temperature responsible for radiation and convection is essentially body-size independent among mammals.
机译：在哺乳动物中，体温的相似性表明热量损失的体型差异必须与产热的体型差异相匹配。这项研究测试了通过辐射和对流造成热量损失的体表温度（Tbs）可能随动物体重（M）系统变化的可能性。 Tbs是通过全身热成像法测量的，来自53个正常哺乳动物的53个标本中，标本的范围从几克到几吨不等。在室内，环境温度为20-22摄氏度，22-25摄氏度或25-27摄氏度的情况下，在没有空气对流和外部辐射源的情况下，动物在室内静止不动地从各个角度拍摄了许多热像仪。将数据分析为全身表面平均值，“有效”身体表面积的平均值（温度超过环境温度> 1.5摄氏度或> 5摄氏度的那些区域），峰直方图分布和平均值。具有最高20％温度值的区域。对于所有数据分析模式以及在所有环境温度下，Tbs均与动物的M无关。根据这些数据，估计辐射和自然对流相结合产生的热损失变化为M的2/3幂。结论是，在相同的环境条件下，负责辐射和对流的表面温度基本上与哺乳动物的体型无关。

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