By Herp News
Bears hibernate during winters. So do some bats, squirrels, and many other mammals. But very few primates are known to hibernate. In fact, scientists have previously observed hibernation in only three species of lemurs, all found in Madagascar: the western fat-tailed lemur, Crossley’s dwarf lemur and Sibree’s dwarf lemur. Now, researchers have discovered a non-Malagasy primate species — the pygmy slow loris (Nycticebus pygmaeus) inhabiting forests of southeast Asia — that hibernates during winter. This is the first record of a hibernating primate outside of Madagascar, according to a new study published in Nature’s Scientific Reports. “There had been anecdotal observations of pygmy lorises that remained inactive for several days,” Thomas Ruf of Universty of Veterinary Medicine, Vienna, Austria, said in a statement. “Occasionally animals were encountered that felt cool to the touch. However, we discovered only now that the lorises actually hibernate.” Researchers have found that the pygmy slow loris can hibernate for up to 63 hours. Photo by David Haring / Duke Lemur Center|Wikimedia Commons CC BY-SA 3.0 By lowering body temperature and slowing down metabolism, hibernating animals try to conserve energy during cold winters when food is not readily available. The tiny nocturnal pygmy slow loris too, faces shortage of fresh vegetation and insects when ambient temperatures dip. To see if these animals actually hibernate during winter, Ruf and his colleagues recorded body temperature of five pygmy slow lorises in fall, winter and spring in a Vietnamese primate reserve. In the reserve, the researchers…
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