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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Altman, P. L., Dittmer, D. S. (eds.): Biology data book, vol. 2, 2nd ed. Bethesda: Federation of American Societies for Experimental Biology (Biological Handbooks) 1973
Aschoff, J.: Response curves in circadian periodicity. In: Circadian clocks, Aschoff, J. (ed.), pp. 95–111. Amsterdam: North-Holland Publ. Co. 1965
Bünning, E.: The physiological clock, 3rd ed. Berlin-Heidelberg-New York: Springer 1973
Djoshkin, W. W., Safonow, W. G.: Die Biber der Alten und Neuen Welt, pp. 71–81. Wittenberg Lutherstadt: A. Ziemsen Verlag (Neue Brehm Bücherei) 1972
Enright, J. T.: The search for rhythmicity in biological time-series. J. theor. Biol.8, 425–468 (1965a)
Enright, J. T.: Synchronization and ranges of entrainment. In: Circadian clocks, Aschoff, J. (ed.), pp. 112–124. Amsterdam: North-Holland Publ. Co. 1965b
Erkinaro, E.: Der Verlauf desynchronisierter, circadianer Periodik einer Waldmaus (Apodemus flavicollis) in Nordfinnland. Z. vergl. Physiol.64, 407–410 (1969)
Evernden, L. N., Fuller, W. A.: Light alteration caused by snow and its importance to subnivean rodents. Canad. J. Zool.50, 1023–1032 (1972)
Folk, G. E., Jr.: Daily physiological rhythms of carnivores exposed to extreme changes in arctic daylight. Fed. Proc.23, 1221–1228 (1964)
Folk, G. E., Jr., Folk, M. A.: Continuous physiological measurements from unrestrained arctic ground squirrels (Citellus parryi). Ann. Acad. Sci. Fenn., Ser. A, IV Biol.71, 157–173 (1964)
Kasatkin, V. I.: Diurnal activity of birds during the nesting period in the transpolar territory. [Russian.] Zool. Zh.42, 303–306 (1963)
Kuznetzov, G. V.: Digging activity ofTalpa caucasica. [Russian.] Zool. Zh.49, 1254–1257 (1970)
Little, E. M., Allen, M. B., Wright, F. F.: Field measurement of light penetration through sea ice. Arctic25, 28–33 (1972)
Marler, P., Hamilton, W. J., III: Mechanisms of animal behavior, chap. 2. New York: Wiley & Sons 1966
Müller, K.: Freilaufende circadiane Periodik von Elritzen am Polarkreis. Naturwissenschaften55, 140 (1968)
Müller, K.: Tagesperiodik von Wasserorganismen am Polarkreis. Umschau1969, 18–19 (1969a)
Müller, K.: Jahreszeitliche Wechsel der 24h-Periodik bei der Bachforelle (Salmo trutta L.) am Polarkreis. Oikos20, 166–170 (1969b)
Müller, K.: Seasonal phase shift and the duration of activity time in the burbot,Lota lota (L.) (Pisces, Gadidae). J. comp. Physiol.84, 357–359 (1973)
Müller-Schwarze, D.: Circadian rhythms of activity in the Adélie penguin (Pygoscelis adeliae) during the austral summer. In: Antarctic bird studies, Austin, O. L., Jr. (ed.), pp. 133–149. Washington: American Geophysical Union 1968
Ojasti, J.: Ritmos de actividad diaria deProechimys en su ambiente normal y en la Cueva del Guácharo. Acta biol. Venez.3, 122–140 (1961)
Peiponen, V. A.: Animal activity patterns under subarctic summer conditions. In: Ecology of the subarctic regions, Proceedings of the Helsinki symposium, pp. 281–287. Paris: Unesco 1970
Savić, I., Mikes, M.: Zur Kenntnis des 24-Stunden-Rhythmus vonSpalax leucodon Nordmann, 1840. Z. Säugetierkd.32, 233–238 (1967)
Stephenson, A. B.: Temperatures within a beaver lodge in winter. J. Mammal.50, 134–136 (1969)
Swade, R. H., Pittendrigh, C. S.: Circadian locomotor rhythms of rodents in the Arctic. Amer. Naturalist101, 431–466 (1967)
Tevis, L., Jr.: Summer behavior of a family of beaver in New York State. J. Mammal.31, 40–65 (1950)
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This work was supported by the National Research Council of Canada (grant no. A 4880/6639 to J.B.). The computer work was performed by Mr. J. M. Poulin, Centre de Traitement de l'Information, Université Laval. The logistic support of the Environmental Science Center, University of Calgary, is gratefully acknowledged. We thank Drs. Jürgen Aschoff, Jeremy McNeil and Daryl K. Sherman for critically reading the manuscript.
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Bovet, J., Oertli, E.F. Free-running circadian activity rhythms in free-living beaver (Castor canadensis). J. Comp. Physiol. 92, 1–10 (1974). https://doi.org/10.1007/BF00696522
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DOI: https://doi.org/10.1007/BF00696522