Erkert Hans G
Institut für Biologie III, Universität Tübingen, Tübingen, West Germany.
Am J Primatol. 1989;17(4):271-286. doi: 10.1002/ajp.1350170403.
The circadian activity rhythm of the common marmoset, Callithrix j. jacchus was investigated by long-term recording of the locomotor activity of 15 individuals (5 males, 10 females) from 1.5 to 8 years old, both under constant illumination and under LD 12:12. The mean period of the spontaneous circadian rhythm was 23.2 ± 0.3 h. Neither sex-specific differences nor a systematic influence of light intensity on the spontaneous period were observed, but the period was dependent on the duration of the trial and on the age of the individual. Due to the short spontaneous period, in LD 12:12 there was a distinct advance of the activity phase with respect to the light time and a masking of the true onset of activity by the inhibitory direct effect of low light intensity during the dark time. After an 8 h delay shift of the LD 12:12, re-entrainment of the circadian activity rhythm required an average of 6.8 ± 0.7 days; the average re-entrainment time after an 8 h phase advance of the LD cycle was 8.6 ± 1.3 day. This directional effect is ascribed to characteristics of the phase-response curve. No ultradian components were observed, either in the LD-entrained or the free-running circadian activity rhythm.
通过长期记录15只年龄在1.5至8岁之间的普通狨猴（Callithrix j. jacchus，5只雄性，10只雌性）在持续光照和LD 12:12条件下的运动活动，研究了它们的昼夜活动节律。自发昼夜节律的平均周期为23.2±0.3小时。未观察到性别差异以及光强度对自发周期的系统性影响，但周期取决于试验持续时间和个体年龄。由于自发周期较短，在LD 12:12条件下，活动期相对于光照时间有明显提前，并且在黑暗期低光强度的抑制直接作用掩盖了活动的真正开始。在将LD 12:12延迟8小时后，昼夜活动节律的重新同步平均需要6.8±0.7天；在将LD周期提前8小时后，平均重新同步时间为8.6±1.3天。这种方向性效应归因于相位响应曲线的特征。在LD同步或自由运行的昼夜活动节律中均未观察到超日成分。
