AN ELECTROPHYSIOLOGICAL AND BEHAVIORAL-STUDY OF SLEEP IN EMPEROR PENGUINS UNDER NATURAL AMBIENT CONDITIONS
AN ELECTROPHYSIOLOGICAL AND BEHAVIORAL-STUDY OF SLEEP IN EMPEROR PENGUINS UNDER NATURAL AMBIENT CONDITIONS
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DOI：
10.1016/0031-9384(86)90103-4
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发表时间：
1986-01-01
影响因子：
2.9
通讯作者：
LEMAHO, Y
中科院分区：
文献类型：
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作者：
BUCHET, C;DEWASMES, G;LEMAHO, Y
通过手术植入两对帝企鹅进行EEG、EOG和EMG的慢性记录，根据行为和电生理学标准划分了四个觉醒阶段：觉醒(W)。嗜睡(D)。慢波睡眠(SWS)和异相睡眠(PS)。在每个觉醒阶段观察到的电信号关联的一般模式类似于在其他鸟类中报道的模式。研究人员将这两组受试者置于光照和空气温度的自然环境条件下，第一组受试者在昼夜交替的条件下暴露在中等寒冷的环境中，而第二组受试者则在白天处于中温条件下进行研究。睡眠时间(TST)分别为24小时的41.3%和45.1%，差异无统计学意义。与其他鸟类一样，PS发生的时间非常短，平均持续8至10秒，仅占24小时周期的5%至6%。无论外部条件如何，PS与TST的比率似乎保持不变(12%至14%)。讨论了其相对较高的值与捕食敏感性的关系。
In two pairs of emperor penguins surgically implanted for chronic recordings of EEG, EOG and EMG, four arousal stages were characterized on the basis of behavioral and electrophysiological criteria: wakefulness (W). drowsiness (D). slow-wave sleep (SWS) and paradoxical sleep (PS). The general patterns of electrographic correlates observed for each arousal stage resemble those reported in other birds. Sleep patterns were examined with these two pairs placed under natural ambient conditions of light and air temperature, the first pair being exposed to moderate cold under alternate conditions of day and night, and the second studied when daylight was total at thermoneutrality. The time spent in sleep (TST) by each group was 41.3% and 45.1% of the 24 hr period respectively, the difference not being significant. As in other birds, PS occurred in very brief episodes lasting, on average, 8 to 10 seconds and occupying only 5 to 6% of the 24 hr period. Whatever the external conditions, the PS to TST ratio appeared to remain unchanged (12 to 14%). Its relatively high value is discussed in relation to predation susceptibility.