Brain activity of diving seals reveals short sleep cycles at depth

• 成果类型: Article
• 署名作者: Kendall-Bar, Jessica M.; Williams, Terrie M.; Mukherji, Ritika; Lozano, Daniel A.; Pitman, Julie K.; Holser, Rachel R.; Keates, Theresa; Beltran, Roxanne S.; Robinson, Patrick W.; Crocker, Daniel E.; Adachi, Taiki; Lyamin, Oleg I.; Vyssotski, Alexei L.; Costa, Daniel P.
• 署名单位: University of California System; University of California San Diego; Scripps Institution of Oceanography; University of California System; University of California Santa Cruz; University of Oxford; University of California System; University of California Santa Cruz; University of California System; University of California Santa Cruz; California State University System; Sonoma State University; University of California System; University of California Los Angeles; Russian Academy of Sciences; Saratov Scientific Center of the Russian Academy of Sciences; Severtsov Institute of Ecology & Evolution; University of Zurich; Swiss Federal Institutes of Technology Domain; ETH Zurich
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-10071
• DOI: 10.1126/science.adf0566
• 发表日期: 2023-04-21
• 页码: 1-6
• 关键词: slow-wave sleep

摘要

Sleep is a crucial part of the daily activity patterns of mammals. However, in marine species that spend months or entire lifetimes at sea, the location, timing, and duration of sleep may be constrained. To understand how marine mammals satisfy their daily sleep requirements while at sea, we monitored electroencephalographic activity in wild northern elephant seals (Mirounga angustirostris) diving in Monterey Bay, California. Brain-wave patterns showed that seals took short (less than 20 minutes) naps while diving (maximum depth 377 meters; 104 sleeping dives). Linking these patterns to accelerometry and the time-depth profiles of 334 free-ranging seals (514,406 sleeping dives) revealed a North Pacific sleepscape in which seals averaged only 2 hours of sleep per day for 7 months, rivaling the record for the least sleep among all mammals, which is currently held by the African elephant (about 2 hours per day).