Yamauchi C, Fujita S, Obara T, Ueda T
Lab Anim Sci. 1981 Jun;31(3):251-8.
Two generations of rats were raised at animal room temperature ranging from 12 to 32 degrees C at steps of 2 degrees C. The body weight of rats born in 22 degrees C environment and exposed to each temperature did not significantly differ within the range of 16-28 degrees C. The delivery rate, litter size, and weaning rate decreased at 30 degrees C and 32 degrees C, and only the weaning rate had a tendency to decrease at 12 degrees C. No significant difference was demonstrated within the 14-28 degrees C range for any reproduction parameter observed. The body weight of sucklings did not differ at birth within the 12-32 degrees C range; and at 3 weeks of age, there were no differences within the range of 18-28 degrees C. The body weight gain in both sexes after weaning was generally small when the temperature was below 18 degrees C or above 30 degrees C. There were no significant differences in food intake within the 20-26 degrees C range, in water intake within the 12-26 degrees C range, in hematological and serum biochemical values within the 20-26 degrees C range, and in organ weights within the 18-28 degrees C range. Therefore, the range of 20-26 degrees C (68-78 degrees F) was the optimum temperature range in rat rooms.
两代大鼠在12至32摄氏度、步长为2摄氏度的动物室温环境中饲养。在22摄氏度环境中出生并暴露于各温度下的大鼠，其体重在16至28摄氏度范围内无显著差异。在30摄氏度和32摄氏度时，分娩率、窝仔数和断奶率下降，在12摄氏度时只有断奶率有下降趋势。在所观察的任何繁殖参数方面，在14至28摄氏度范围内均未显示出显著差异。在12至32摄氏度范围内，仔鼠出生时体重无差异；在3周龄时，在18至28摄氏度范围内无差异。当温度低于18摄氏度或高于30摄氏度时，两性断奶后的体重增加通常较小。在20至26摄氏度范围内，食物摄入量无显著差异；在12至26摄氏度范围内，水摄入量无显著差异；在20至26摄氏度范围内，血液学和血清生化值无显著差异；在18至28摄氏度范围内，器官重量无显著差异。因此，20至26摄氏度（68至78华氏度）是大鼠饲养室的最佳温度范围。
