The blood-borne "trigger" for natural mammalian hibernation in the 13-lined ground squirrel and the woodchuck.
D000818:Animals; D001769:Blood; D001803:Blood Transfusion; D001831:Body Temperature; D003080:Cold Temperature; D003956:Dialysis; D005260:Female; D005615:Freezing; D006605:Hibernation; D008297:Male; D008954:Models, Biological; D009996:Osmotic Fragility; D012377:Rodentia / Q000502:physiology*; D012589:Sciuridae / Q000502:physiology*; D012621:Seasons; D012737:Sex Factors; D013045:Species Specificity