Population and Conservation Status of Indochinese Gray Langurs ( Trachypithecus crepusculus ) in the Wuliang Mountains, Jingdong, Yunnan, China

摘要: Peripheral populations are valuable for conservation because of their potential genetic distinctiveness and ecological differentiation, but they tend to be smaller more easily isolated than central populations. The Indochinese gray langurs living in the Wuliang Mountains southwestern China, which form northernmost peripheral population species, have behavioral features distinct from those other such We conducted semistructured interviews field surveys on census distribution Jingdong County July 2013 November 2013. These provided first large-scale data about habitat use these langurs; however, group sizes estimated interview reports were obtained direct counts. estimate that 43 groups comprising ca. 1960 individual reside evergreen broadleaf forests at an altitudinal 1700–2900 m Jingdong. Of langur groups, 21 observed outside nature reserve or had home ranges straddle boundary reserve. Because intensive efforts protect sympatric Nomascus concolor, hunting pressure is minimal. However, not protected remain threatened by deforestation plantations (walnut, tea, etc.) forest degradation caused livestock grazing. More attention currently applied needed conserve