Dedicated to Professor Colin S. Pittendrigh on the occasion of his 60th birthday.
Circadian Rhythms: Influences of Internal and External Factors on the Period Measured in Constant Conditions1
Version of Record online: 26 APR 2010
1979 Blackwell Verlag GmbH
Zeitschrift für Tierpsychologie
Volume 49, Issue 3, pages 225–249, January-December 1979
How to Cite
Aschoff, J. (1979), Circadian Rhythms: Influences of Internal and External Factors on the Period Measured in Constant Conditions. Zeitschrift für Tierpsychologie, 49: 225–249. doi: 10.1111/j.1439-0310.1979.tb00290.x
- Issue online: 26 APR 2010
- Version of Record online: 26 APR 2010
- Received: August 23, 1978 Accepted: September 26, 1978
The article reviews most of the data available on the period ẗ of freerunning circadian rhythms, measured in constant conditions. Emphasis is placed on the effects of light intensity and ambient temperature on ẗ, with references to influences of other external as well as internal factors. In the introduction, examples are given of spontaneous and induced variations in ẗ and its dependence on the experimental history. The discussion concentrates' largely on results obtained from arthropods and vertebrates.