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Science, Dec 2023, 382 (6674) | https://doi.org/10.1126/science.adh0771
Nesting chinstrap penguins accrue large quantities of sleep through seconds-long microsleeps
P.-A. Libourel1,*,†, W. Y. Lee2,*,†, I. Achin1, H. Chung2, J. Kim3, B. Massot4, N. C. Rattenborg5
1Neuroscience Research Center of Lyon, Bron, France.
2Korea Polar Research Institute, Incheon, Republic of Korea.
3Cheongju Zoo, Cheongju, Republic of Korea.
4Lyon Institute of Nanotechnology, Villeurbanne, France.
5Avian Sleep Group, Max Planck Institute for Biological Intelligence, Seewiesen, Germany
*Corresponding authors: P.-A. Libourel, W. Y. Lee
†These authors contributed equally to this work.
Abstract
Microsleeps, the seconds-long interruptions of wakefulness by eye closure and sleep-related brain activity, are dangerous when driving and might be too short to provide the restorative functions of sleep. If microsleeps do fulfill sleep functions, then animals faced with a continuous need for vigilance might resort to this sleep strategy. We investigated electroencephalographically defined sleep in wild chinstrap penguins, at sea and while nesting in Antarctica, constantly exposed to an egg predator and aggression from other penguins. The penguins nodded off >10,000 times per day, engaging in bouts of bihemispheric and unihemispheric slow-wave sleep lasting on average only 4 seconds, but resulting in the accumulation of >11 hours of sleep for each hemisphere. The investment in microsleeps by successfully breeding penguins suggests that the benefits of sleep can accrue incrementally.
논문정보
- Research article
- 2023년 12월 (BRIC 등록일 2023-12-04)
- 국내(교신)+국외 연구진
- 생명과학 > 분류/생태/환경생물학
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