User talk:Mikel4444

'''While hibernation has long been studied in rodents, namely ground squirrels, no primate or tropical mammal was known to hibernate prior to animal physiologist Kathrin Dausmann of Philipps University of Marburg, Germany, and coworkers presenting evidence that the Fat-tailed Dwarf Lemur of Madagascar hibernates in tree holes for seven months of the year.[5] Malagasy winter temperatures sometimes rise to over 30 °C (86 °F), so hibernation is not exclusively an adaptation to low ambient temperatures. The hibernation of this lemur is strongly dependent on the thermal behaviour of its tree hole: if the hole is poorly insulated, the lemur's body temperature fluctuates widely, passively following the ambient temperature; if well insulated, the body temperature stays fairly constant and the animal undergoes regular spells of arousal.[citation needed] Dausmann found that hypometabolism in hibernating animals is not necessarily coupled to a low body temperature.[6][citation needed]

[edit] BearsBears hibernate very differently than either rodents or primates. They rely on active metabolic suppression, rather than a decreased body temperature to save energy over winter. Despite their lack of body temperature change, bears have an impressive hibernation physiology. They are able to recycle their proteins and urine, allowing them to stop urinating for months.[7][8]

[edit] Obligate hibernatorsObligate Bold text'--Mikel4444 (talk) 17:35, 13 March 2013 (UTC)Italic''