Social Organization of Shortridge's Capped Langur (Trachypithecus
ZOOLOGICAL RESEARCH Social organization of Shortridge’s capped langur (Trachypithecus shortridgei) at the Dulongjiang Valley in Yunnan, China Ying-Chun LI1, †, Feng LIU1, †, Xiao-Yang HE2, Chi MA3, Jun SUN2, Dong-Hui LI2, Wen XIAO3, *, Liang-Wei CUI1,4, * 1 Forestry Faculty, Southwest Forestry University, Kunming, Yunnan 650224, China 2 Nujiang Administration Bureau, Gaoligongshan National Nature Reserve, Liuku, Yunnan 673100, China 3 Institute of Eastern-Himalaya Biodiversity Research, Dali University, Dali, Yunnan 671003, China 4 College of Life Sciences, Northwest University, Xi’an, 710069, China ABSTRACT organization can be categorized into solitary, pair-living and group-living speceis (Kappeler & van Schaik 2002). Solitary Non-human primates often live in socially stable individuals typically forage alone (Boinski & Garber, 2000) and groups characterized by bonded relationships their activities are desynchronized with each other both spatially among individuals. Social organization can be used and temporally (Charles-Dominique, 1978). Except for orangutan, to evaluate living conditions and expansion potential. most solitary primate species are nocturnal (Kappeler & van Bisexual group size, ratio of males to females and Schaik, 2002). Pair-living species refer to couples of one adult group composition are essential elements male and one adult female (Kappeler, 1999), such as gibbons. determining the type of social organization. Although Most primates live in bisexual groups (van Schaik & Kappeler, the first report on Shortridge’s capped langurs 1997), which are much more stable compared with other (Trachypithecus shortridgei) was in the 1970s, until mammals, and consist of more than two adults. Group living now, the species only inhabits forests of the primates displayed a diversity with respect to the size, sex ratio Dulongjiang valley in northwest Yunnan, China, with and temporal stabitliy of compositioin.
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