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Fat-tailed dwarf lemur
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==Hibernation== Recent research has shown that ''C. medius'' [[hibernation|hibernates]] (or [[Aestivation|aestivates]]), even though in the tropical winter of Madagascar, temperatures remain high. It is the first tropical mammal and only primate in which hibernation has been demonstrated. However, the Malagasy winter is dry, and it appears that the [[lemur]] is avoiding the drought. It can hibernate for seven months. Unlike animals that hibernate in temperate regions, the lemur does not control its body temperature while hibernating, and if the tree hole in which it is sleeping is not well insulated, its body temperature fluctuates in accordance with the outside temperature.<ref>{{cite journal |author1=Dausmann, K. H. |author2=Glos, J. |author3=Ganzhorn, J. U. |author4= Heldmaier, G. |name-list-style=amp| year = 2004 | title = Hibernation in a tropical primate | journal = Nature | volume = 429 | pages = 825β826 | doi = 10.1038/429825a | pmid = 15215852 | issue = 6994|s2cid=4366123 }}</ref> During torpor, this lemur has been found to periodically enter [[REM sleep]]; [[non-REM sleep]] has not been observed, a pattern opposite that found in hibernating [[ground squirrel]]s.<ref name=Krystal2013>{{Cite journal | last1 = Krystal | first1 = A. D. | last2 = Schopler | first2 = B. | last3 = Kobbe | first3 = S. | last4 = Williams | first4 = C. | last5 = Rakatondrainibe | first5 = H. | last6 = Yoder | first6 = A. D. | last7 = Klopfer | first7 = P. | editor1-last = Seebacher | editor1-first = Frank | title = The Relationship of Sleep with Temperature and Metabolic Rate in a Hibernating Primate | doi = 10.1371/journal.pone.0069914 | journal = PLOS ONE | volume = 8 | issue = 9 | pages = e69914 | year = 2013 | pmid = 24023713| pmc = 3762832| bibcode = 2013PLoSO...869914K | doi-access = free }}</ref> The REM sleep episodes occurred during periods of higher ambient temperature (averaging 27 C, versus an average of 20 C during nonsleeping intervals while in torpor).<ref name=Krystal2013/> ''C. medius'' has a significantly longer lifespan than other strepsirrhinine or nonstrepsirrhinine primates of similar size, and this longevity is thought to be related to its status as part of the only primate genus that is an obligatory hibernator. Its maximum lifespan in captivity is nearly 30 years.<ref name="Blanco2015">{{cite journal|last1=Blanco|first1=M. B.|last2=Zehr|first2=S. M.|title=Striking longevity in a hibernating lemur|journal=Journal of Zoology|date=2015-03-18|pages=177β188|issn=0952-8369|doi=10.1111/jzo.12230|volume=296|issue=3}}</ref> Like other fat-tailed lemurs, ''C. medius'' is able to store [[fat]] in its tail, and this provides a source of energy during its period of dormancy.
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