Abstract # 2304 Event # 108:

Scheduled for Friday, June 22, 2007 01:30 PM-01:45 PM: Session 13 (North Main Hall E) Oral Presentation

Sub-specific Characterization and Distributional Status of Capped Langur (TRACHYPITHECUS PILEATUS) in Arunachal Pradesh, India

J. Biswas1,2, B. Dhirah1,2, D. Abhijit2, D. Jayanta1,2,3, P. C. Bhattacharjee1,2 and R. Horwich4
1Animal Ecology & Wildlife Biology Lab, Department of Zoology, Gauhati University, Guwahati, Assam 781014, India, 2Primate Research Center Northeast India, 3Wildlife Areas Development and Welfare Trust, 4Community Conservation, Inc.
     Four sub-species of the capped langur (Trachypithecus pileatus) have been recognized based on their pelage color: blonde bellied capped langur (Trachypithecus pileatus pileatus); orange bellied capped langur (T. p. durga); buff bellied capped langur (T. p. brahma) and tenebrous capped langur (T. p. tenebricus). T. p. tenebricus is distributed in north west Assam and South central Bhutan, while T. p. pileatus is distributed in Myanmar, Assam, Nagaland, Manipur, Mizoram, Meghalaya and some parts of Bangladesh. The distribution of T. p. brahma has reported only from ‘Seajuli’ near Dufla hills, Arunachal Pradesh. There is no information available on the sub-specific distribution of capped langur in Arunachal Pradesh. In this study, we report blonde bellied capped langurs in high elevation of Tawang and West Kameng district (841–2914m), north-western Arunachal Pradesh as well as low to mid elevation of Lohit and Changlang district (410–1035m), south-eastern Arunachal Pradesh and report some individuals with intermediate pelage color with that of orange bellied in low elevation (75-180m) of Lohit district. We also report tenebrous capped langur from low elevation (89–795m) of West Kameng district. These observations suggest the blonde bellied capped langur with some pelage color variation has a fairly large range in the higher elevation of Arunachal Pradesh and might have been replaced by the tenebrous sub-species in the south-western part, by the buff bellied in the south-central part and by the orange bellied in south-eastern part of Arunachal Pradesh at lower elevations.