2026-03-09T08:45:53Z https://ir.soken.ac.jp/oai

oai:ir.soken.ac.jp:00003855 2023-06-20T14:29:33Z 1:277

Prevalence of muzzle-rubbing and hand-rubbing behavior in wild chimpanzees in Mahale Mountains National Park, Tanzania Prevalence of muzzle-rubbing and hand-rubbing behavior in wild chimpanzees in Mahale Mountains National Park, Tanzania 沓掛, 展之 CORP, Nadia HAYAKI, Hitoshige MATSUSAKA, Takahisa FUJITA, Shiho HOSAKA, Kazuhiko KUTSUKAKE, Nobuyuki and , Others metadata only access © Japan Monkey Centre and Springer 2009 In 1998, four chimpanzees in the Mahale Mountains National Park, Tanzania, were observed wiping their mouths with non-detached leaves or stalks of grass, or rubbing their mouths with a tree trunk or branch, especially while eating lemons. The number of mouth-wiping/rubbing individuals increased to 18 in 1999. By 2005, 29 chimpanzees were documented wiping/rubbing their muzzles in this way. Although it is difficult to determine whether the chimpanzees acquired this behavior as a result of trial and error or social learning, the fact that chimpanzees at other sites perform this behavior with detached leaves or leafy twigs much more often than with intact items suggests the possibility that cleaning with intact plant parts at Mahale spread via social learning. SpringerLink 2009 eng journal article https://ir.soken.ac.jp/records/3855 19165560 https://doi.org/10.1007/s10329-008-0126-x 10.1007/s10329-008-0126-x 00328332 Primates Primates 50 2 184 189