A "circannian" rhythm in hibernating species of the genus Citellus with observations on their physiological evolution.
D000818:Animals; D001522:Behavior, Animal; D001835:Body Weight; D002369:Castration; D005260:Female; D006605:Hibernation / Q000502:physiology*; D008297:Male; D010507:Periodicity; D012377:Rodentia / Q000502:physiology*; D013696:Temperature