Nesting chinstrap penguins accrue large quantities of sleep through seconds-long microsleeps.

Autor: Libourel PA; Neuroscience Research Center of Lyon, Bron, France., Lee WY; Korea Polar Research Institute, Incheon, Republic of Korea., Achin I; Neuroscience Research Center of Lyon, Bron, France., Chung H; Korea Polar Research Institute, Incheon, Republic of Korea., Kim J; Cheongju Zoo, Cheongju, Republic of Korea., Massot B; Lyon Institute of Nanotechnology, Villeurbanne, France., Rattenborg NC; Avian Sleep Group, Max Planck Institute for Biological Intelligence, Seewiesen, Germany.
Jazyk: angličtina
Zdroj: Science (New York, N.Y.) [Science] 2023 Dec; Vol. 382 (6674), pp. 1026-1031. Date of Electronic Publication: 2023 Nov 30.
DOI: 10.1126/science.adh0771
Abstrakt: 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.
Databáze: MEDLINE
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