高原鼠兔似昼夜活动节律的研究

本文对高原鼠兔活动节律的季节变化,不同光强对高原鼠兔似昼夜活动节律的影响,以及温度效应,饥俄效应等问题进行了研究。同时对昼夜节律研究中长期存在的理论问题,内源性和外源性观点提出探讨。

CIRCADIAN ACTIVITY RHYTHMS OF PLATEAU PIKAS,OCHOTONA CURZONIAE

Spontaneous locomotor activity rhythms of plateau pikas are recorded on Animex, DSZ (small animal activity recorder) through laboratory experiments in Xining. The main results are as follows:1. Plateau pikas are diurnal animal having two-peaks of the diurnal activities under natural light-dark cycle. The seasonal changes of their activity rhythms are in keeping with the "Seasonal Rule" reported by Aschoff et al. in 1964. Onset and end of activity in the pikas are related to the instantaneous change of the sunlight intensity around sunrise and sunset. The clock is more precise in spring and autumn than in winter and summer.2. Activity rhythms among the male and female, adult and young pikas are different, their activity patterns are controlled by behaviours in the reproductive period.Females tend to locomote more than males during the mating time, but the contrary is true during the gestational period. Young animals are always more active than older ones.3. Circadian rhythms, with which plateau pikas locomote under constant environmental conditions, fit "Aschoff Rule".With an increase of the illuminative intensity, the phase gets advancing and activity capacity decreases accordingly. Circadian activity rhythms of the pikas will stop in a long constant light.