Journal of comparative physiology

, Volume 92, Issue 1, pp 1–10

Free-running circadian activity rhythms in free-living beaver (Castor canadensis)

  • Jacques Bovet
  • Erwin F. Oertli
Article

Summary

The members of a beaver family studied under natural conditions in SW Alberta, Canada (115 °03′ W, 51 °02′ N) displayed a free-running circadian rhythm of activity with a period length of about 27 hours in winter, at a time when they were living under ice and had no access to land (Fig. 1, A and C). In summer, the period length of their activity rhythm was close to 24 hours (Fig. 1, B).

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Copyright information

© Springer-Verlag 1974

Authors and Affiliations

  • Jacques Bovet
    • 1
    • 2
  • Erwin F. Oertli
    • 1
    • 2
    • 3
  1. 1.Département de BiologieUniversité LavalQuébecCanada
  2. 2.Department of BiologyUniversity of CalgaryCalgaryCanada
  3. 3.BanffCanada

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