Volume 36 Issue 3
May  2015
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Ying-Chun LI, Feng LIU, Xiao-Yang HE, Chi MA, Jun SUN, Dong-Hui LI, Wen XIAO, Liang-Wei CUI. Social organization of Shortridge's capped langur (Trachypithecus shortridgei) at the Dulongjiang Valley in Yunnan, China. Zoological Research, 2015, 36(3): 152-160.
Citation: Ying-Chun LI, Feng LIU, Xiao-Yang HE, Chi MA, Jun SUN, Dong-Hui LI, Wen XIAO, Liang-Wei CUI. Social organization of Shortridge's capped langur (Trachypithecus shortridgei) at the Dulongjiang Valley in Yunnan, China. Zoological Research, 2015, 36(3): 152-160.

Social organization of Shortridge's capped langur (Trachypithecus shortridgei) at the Dulongjiang Valley in Yunnan, China

Funds:  This study was supported by the Yunnan Green Environmental Development Fund, the Central Financial Assistance Fund, the National Natural Science Foundation of China (31160422, 30960084), the Program for New Century Excellent Talents in University (NCET-12-1079), the China Postdoctoral Science Foundation (2013M542379) and the Key Subject of Wildlife Conservation and Utilization in Yunnan Province
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  • Corresponding author: Wen XIAO, Liang-Wei CUI
  • Received Date: 2014-12-15
  • Rev Recd Date: 2015-03-05
  • Publish Date: 2015-05-08
  • Non-human primates often live in socially stable groups characterized by bonded relationships among individuals. Social organization can be used to evaluate living conditions and expansion potential. Bisexual group size, ratio of males to females and group composition are essential elements determining the type of social organization. Although the first report on Shortridge's capped langurs (Trachypithecus shortridgei) was in the 1970s, until now, the species only inhabits forests of the Dulongjiang valley in northwest Yunnan, China, with c. 250-370 individuals in 19 populations. To understand its social organization, we collected data from five groups of Shortridge's langurs at Silaluo in the Dulongjiang valley during August 2012-October 2013. Family groups consist of one adult male, 2–3 adult females and up to five young. Group size averaged 8 (7-9) individuals. The ratio of adult males to females (M/F) was 1:2.9, infants to adult females was (I/F) 1:2.2; and ratio of adults to immatures was 1:1.2, indicating the potential of a population increasing. Birth season was during March-July and the inter-birth interval was two years.
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Social organization of Shortridge's capped langur (Trachypithecus shortridgei) at the Dulongjiang Valley in Yunnan, China

Funds:  This study was supported by the Yunnan Green Environmental Development Fund, the Central Financial Assistance Fund, the National Natural Science Foundation of China (31160422, 30960084), the Program for New Century Excellent Talents in University (NCET-12-1079), the China Postdoctoral Science Foundation (2013M542379) and the Key Subject of Wildlife Conservation and Utilization in Yunnan Province
    Corresponding author: Wen XIAO, Liang-Wei CUI

Abstract: Non-human primates often live in socially stable groups characterized by bonded relationships among individuals. Social organization can be used to evaluate living conditions and expansion potential. Bisexual group size, ratio of males to females and group composition are essential elements determining the type of social organization. Although the first report on Shortridge's capped langurs (Trachypithecus shortridgei) was in the 1970s, until now, the species only inhabits forests of the Dulongjiang valley in northwest Yunnan, China, with c. 250-370 individuals in 19 populations. To understand its social organization, we collected data from five groups of Shortridge's langurs at Silaluo in the Dulongjiang valley during August 2012-October 2013. Family groups consist of one adult male, 2–3 adult females and up to five young. Group size averaged 8 (7-9) individuals. The ratio of adult males to females (M/F) was 1:2.9, infants to adult females was (I/F) 1:2.2; and ratio of adults to immatures was 1:1.2, indicating the potential of a population increasing. Birth season was during March-July and the inter-birth interval was two years.

Ying-Chun LI, Feng LIU, Xiao-Yang HE, Chi MA, Jun SUN, Dong-Hui LI, Wen XIAO, Liang-Wei CUI. Social organization of Shortridge's capped langur (Trachypithecus shortridgei) at the Dulongjiang Valley in Yunnan, China. Zoological Research, 2015, 36(3): 152-160.
Citation: Ying-Chun LI, Feng LIU, Xiao-Yang HE, Chi MA, Jun SUN, Dong-Hui LI, Wen XIAO, Liang-Wei CUI. Social organization of Shortridge's capped langur (Trachypithecus shortridgei) at the Dulongjiang Valley in Yunnan, China. Zoological Research, 2015, 36(3): 152-160.
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