Besch E L, Woods J E
Lab Anim Sci. 1977 Feb;27(1):54-9.
Body heat dissipation rates were determined in greyhound and beagle dogs, the rabbit, and the rat. Each group of animals was confined in standard cages in a controlled environment room maintained under conditions of 24 degrees C, 50% relative humidity, and fixed ventilation rats. Food and water were available ad libitum. Heat dissipation rates were determined for each group and normalized to an individual animal basis. The ratio of actual heat dissipation to standard metabolic rate, the metabolic heat ratio, was 2.01+/-0.18 for the greyhound, 1.98+/-0.03 for the beagle, 2.66+/-0.20 for the rabbit, and 1.95+/-0.13 for the rat. For each species, the ratio displayed a 24-hour cyclic pattern in which four contiguous maximum values differed significantly from four contiguous minimum values. The ratios of maximum values to minimum values were between 1.54 and 1.75.
测定了灵缇犬、比格犬、兔子和大鼠的体热散失率。每组动物被关在标准笼子里，置于温度为24摄氏度、相对湿度为50%且通风速率固定的可控环境室内。食物和水可随意获取。测定了每组动物的散热率，并以个体动物为基础进行归一化处理。实际散热与标准代谢率的比值，即代谢热比，灵缇犬为2.01±0.18，比格犬为1.98±0.03，兔子为2.66±0.20，大鼠为1.95±0.13。对于每个物种，该比值呈现出24小时的周期性模式，其中四个连续的最大值与四个连续的最小值有显著差异。最大值与最小值的比值在1.54至1.75之间。
