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Sleep in continuously active dolphins

Author

Listed:
  • Yuske Sekiguchi

    (Research Center of Physical Fitness, Sports and Health, Toyohashi University of Technology, 1-1 Tempaku Toyohashi-city)

  • Kazutoshi Arai

    (Kamogawa Sea World, 1464 Higashicho Kamogawa-city)

  • Shiro Kohshima

    (Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 2-12-1-W3-43 Oookayama Meguro-Ku)

Abstract

Asleep afloat Mammals generally need more rest or sleep in the period just after birth than later in life. So a report in Nature a year ago raised eyebrows: killer-whale and bottlenose-dolphin neonates and their mothers showed little or no typical sleep behaviour for the first postpartum month, remaining mobile for 24 hours a day. This work suggested that sleep behaviour may not have the suspected developmental and life-sustaining functions, and has given rise to an interesting online discussion. Two teams raise the issue of sleep-like behaviour that may complicate matters, though definitions aside, these young mammals do seem to be remarkably active for extended periods.

Suggested Citation

  • Yuske Sekiguchi & Kazutoshi Arai & Shiro Kohshima, 2006. "Sleep in continuously active dolphins," Nature, Nature, vol. 441(7096), pages 9-10, June.
    • Handle: RePEc:nat:nature:v:441:y:2006:i:7096:d:10.1038_nature04898
    DOI: 10.1038/nature04898
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