Population Status and Conservation of Capped Langurs ( Trachypithecus pileatus ) in and Around Pakke Wildlife Sanctuary, Arunachal Pradesh, India

Abstract

A survey of the distribution and population status of the capped langur (Trachypithecus pileatus) was conducted in and around the Pakke Wildlife Sanctuary in Arunachal Pradesh, India. From 2001â•fi2003, we surveyed ten selected localities, recording 26 troops and a total of 195 individuals. The data was obtained using line transect surveys and total count methods. Capped langurs were found in a number of different habitats: tropical semi-evergreen forest and moist deciduous forests. Of the 195 individuals registered, 14% were adult males, 52% adult females, 2% unidentified adults, 7% sub-adults, 11% juveniles and 15% infants. The smallest troop numbered 3, and the largest 13, with an average troop size of 7.4 individuals. The male-female ratio was 1:3.6. The most common size class of the troop was of 7â•fi9 individuals.