Winter Activity Patterns of Two Radio-Marked Beaver Colonies

Autor:	Richard A. Lancia, Joseph S. Larson, Wendell E. Dodge
Rok vydání:	1982
Předmět:	photoperiodism Castor canadensis Beaver Ecology Adult female Adult male Period (gene) Activity rhythms Zoology Biology biology.organism_classification biology.animal Genetics Zeitgeber Animal Science and Zoology Ecology Evolution Behavior and Systematics Nature and Landscape Conservation
Zdroj:	Journal of Mammalogy. 63:598-606
ISSN:	0022-2372 1545-1542
DOI:	10.2307/1380264
Popis:	Activities of two radio-marked beaver ( Castor canadensis ) colonies were studied during the winters of 1976–1977 and 1977–1978. In one colony the adult male and adult female displayed free-running activity rhythms of 29.0 and 26.6 h respectively, under variable ambient temperatures and intermittent ice cover. Their activities were asynchronous for a period when the adult male apparently was entrained to a weak photoperiod Zeitgeber, and the adult female was free-running. For both colonies an index of above-ice activity was positively related to ambient temperature, i.e., below about −10°C above-ice activity was absent and, as temperature increased, above-ice activity increased. Free-running activity patterns and above-ice activity are interpreted to be behavioral adaptations related to wintertime bioenergetic budgets.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5adb60c4055731cd80bb583f2c74364b https://doi.org/10.2307/1380264 Zobrazit plný text záznamu