title: Genetic Diversity and Structure among Isolated Populations of the Endangered Gees Golden Langur in Assam, India.
abstract: Gee's golden langur (Trachypithecus geei) is an endangered colobine primate, endemic to the semi-evergreen and mixed-deciduous forests of Indo-Bhutan border. During the last few decades, extensive fragmentation has caused severe population decline and local extinction of golden langur from several fragments. However, no studies are available on the impact of habitat fragmentation and the genetic diversity of golden langur in the fragmented habitats. The present study aimed to estimate the genetic diversity in the Indian population of golden langur. We sequenced and analyzed around 500 bases of the mitochondrial DNA (mtDNA) hypervariable region-I from 59 fecal samples of wild langur collected from nine forest fragments. Overall, genetic diversity was high (h = 0.934, π = 0.0244) and comparable with other colobines. Populations in smaller fragments showed lower nucleotide diversity compared to the larger forest fragments. The median-joining network of haplotypes revealed a genetic structure that corresponded with the geographical distribution. The Aie and Champabati Rivers were found to be a barrier to gene flow between golden langur populations. In addition, it also established that T. geei is monophyletic but revealed possible hybridization with capped langur, T. pileatus, in the wild. It is hoped that these findings would result in a more scientific approach towards managing the fragmented populations of this enigmatic species.
authors: Laboratory for the Conservation of Endangered Species, CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500007, India.
authors: Muthuvarmadam S
authors: MS
authors: Ram
authors: Laboratory for the Conservation of Endangered Species, CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500007, India.
authors: Sagar M
authors: SM
authors: Kittur
authors: Primate Research Centre NE India, H/N 4, Byelane 3, Ananda Nagar, Pandu, Guwahati 781012, India.
authors: Jihosuo
authors: J
authors: Biswas
authors: Primate Research Centre NE India, H/N 4, Byelane 3, Ananda Nagar, Pandu, Guwahati 781012, India.
authors: Sudipta
authors: S
authors: Nag
authors: Primate Research Centre NE India, H/N 4, Byelane 3, Ananda Nagar, Pandu, Guwahati 781012, India.|Sálim Ali Centre for Ornithology and Natural History, Anaikatty, Coimbatore 641108, India.
authors: Joydeep
authors: J
authors: Shil
authors: Laboratory for the Conservation of Endangered Species, CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500007, India.
authors: Govindhaswamy
authors: G
authors: Umapathy
mesh_terms: D000818:Animals; D002520:Cercopithecidae / Q000145:classification / Q000235:genetics*; D003247:Conservation of Natural Resources; D004272:DNA, Mitochondrial / Q000235:genetics; D017753:Ecosystem; D056727:Endangered Species; D014644:Genetic Variation / Q000235:genetics*; D006239:Haplotypes / Q000235:genetics; D007194:India
chemical_list: D004272:DNA, Mitochondrial