Brain activity of diving seals reveals short sleep cycles at depth
Brain activity of diving seals reveals short sleep cycles at depth
复制标题
DOI：
10.1126/science.adf0566
复制
发表时间：
2023-04-21
期刊：
影响因子：
56.9
通讯作者：
Costa, Daniel P.
中科院分区：
文献类型：
--
作者：
Kendall-Bar, Jessica M.;Williams, Terrie M.;Costa, Daniel P.
睡眠是哺乳动物日常活动模式的重要组成部分。然而，对于在海上度过数月或一生的海洋物种来说，睡眠的位置，时间和持续时间可能会受到限制。为了了解海洋哺乳动物如何满足他们的日常睡眠需求，而在海上，我们监测脑电图活动的野生北方海象（Mirounga angustirostris）在蒙特雷湾，加州潜水。脑电波模式显示，海豹在潜水（最大深度377米; 104次睡眠潜水）时会小睡一会儿（不到20分钟）。将这些模式与加速度计和334只自由放养海豹（514，406次睡眠潜水）的时间深度剖面联系起来，揭示了北太平洋的睡眠环境，其中海豹平均每天只有2小时睡眠，持续7个月，与所有哺乳动物中睡眠最少的记录相媲美，目前由非洲大象保持（每天约2小时）。
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).