We have studied body temperature dynamics of mature male Wistar rats maintained under constant illumination after surgical removal of the testicles and adrenal glands. In gonadectomized animals, pronounced increases in body temperature (>0.9°C) were observed every 4-6 h; during the periods 03.35-04.30, 07.35-08.30, 11.35-12.30, 15.35-16.30, 19.35-20.30, and 23.35-00.30, they were recorded 1.5-fold more often than during the rest periods. These results do not significantly differ from the parameters of the control group. Combined removal of the testicles and adrenal glands led to shortening of main period of temperature oscillations to 4-4.5 h and a decrease in its amplitude; pronounced increase in body temperature (>0.5°C) was observed 2.1 times more often during the periods 03.35-04.30, 07.35-08.30, 11.35-12.30, 15.35-16.30, 19.35-20.30, and 23.35-00.30 than in other time intervals. Thus, the removal of the testicles and adrenal glands does not violate the 4-h intraday rhythm of body temperature.

中文翻译：

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在恒定光照条件下手术切除睾丸和肾上腺对雄性 Wistar 大鼠体温超电节律的影响

我们研究了在手术切除睾丸和肾上腺后保持在恒定光照下的成熟雄性 Wistar 大鼠的体温动态。在切除性腺的动物中，每 4-6 小时观察到体温显着升高 (>0.9°C)；在 03.35-04.30、07.35-08.30、11.35-12.30、15.35-16.30、19.35-20.30 和 23.35-00.30 期间，它们的记录频率是其他时期的 1.5 倍。这些结果与对照组的参数没有显着差异。联合切除睾丸和肾上腺导致温度振荡的主要周期缩短至 4-4.5 小时，并且其幅度减小；在 03.35-04.30、07.35-08.30、11.35-12.30、15.35-16.30、19.35-20.30 期间，观察到体温显着升高（>0.5°C）的频率增加了 2.1 倍，和 23.35-00.30 比其他时间间隔。因此，切除睾丸和肾上腺不会违反 4 小时的日内体温节律。