Szymczak J T
Department of Animal Physiology, Nicolaus Copernicus University, Toruń, Poland.
Chronobiologia. 1987 Jul-Sep;14(3):277-87.
The daily organization of sleep and wakefulness was examined electrographically under natural conditions in captive juvenile and adult magpies, Pica pica. Electrographic indices of sleep in the magpie were found to be similar to those of other avian species. The daily amount of TS in juveniles was 17% greater than in adults. The amount of paradoxical sleep (PS) in adults was one-fifth that of juveniles. In adults sleep was confined to darkness, while in juveniles it also occurred during the light period. SWS in adults was almost constant, while PS slightly increased across the night. No systematic trends were observed in juveniles. In both groups of birds, the longest sleep episodes appeared around midnight.
在圈养的幼年和成年喜鹊自然条件下，通过脑电图检查了睡眠和觉醒的日常组织情况。发现喜鹊的睡眠脑电图指标与其他鸟类相似。幼年喜鹊的每日总睡眠时间比成年喜鹊多17%。成年喜鹊的异相睡眠量是幼年喜鹊的五分之一。成年喜鹊的睡眠仅限于黑暗时段，而幼年喜鹊在光照时段也会睡眠。成年喜鹊的慢波睡眠几乎恒定，而异相睡眠在夜间略有增加。幼年喜鹊未观察到系统性趋势。在两组鸟类中，最长的睡眠时段都出现在午夜左右。
