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Journal of comparative physiology

, Volume 98, Issue 3, pp 243–256 | Cite as

Annual cycle of patterns of activity rhythms in beaver colonies (Castor canadensis)

  • Claude L. Potvin
  • Jacques Bovet
Article

Summary

Beavers studied under natural conditions near Québec City, Canada, displayed a yearly cycle of patterns of activity rhythms. In winter, the beaver colonies had a free-running circadian rhythm of period length 26.25 to 28.0 h, with or without relative coordination, depending on available light intensity, which in turn depends on ice and snow cover conditions; in summer, their activity rhythm followed a “normal” 24 h period. Transitions between these two patterns suggest that annual variations in the beaver's physiological state affect their reaction towards the presence or absence of a Zeitgeber.

Keywords

Light Intensity Natural Condition Physiological State Circadian Rhythm Snow Cover 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Verlag 1975

Authors and Affiliations

  • Claude L. Potvin
    • 1
    • 2
  • Jacques Bovet
    • 1
  1. 1.Département de BiologieUniversité LavalQuébecCanada
  2. 2.Department of ZoologyUniversity of GuelphGuelphCanada

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