IUCN / SSC Cat Specialist Group - Digital Cat Library |
|
||||||||||
|
||||||||||
|
|
| Gonzalez Monge, A. | |
| The socioecology, and the effects of human activity on it, of the Annamese Silvered Langur (_Trachypithecus margarita_) in Northeastern Cambodia | |
| 2016 Full Book | |
The Annamese silvered langur (_Trachypithecus margarita_) is a colobine species recently recognized as a separate species and considered Endangered by the IUCN. It lives in Indochina, east of the Mekong River. There are some studies on its morphology, distribution and diet. Information on the species' ranging, social behavior and organization, habitat use and reproduction is scarce. The effects of human disturbance on langurs are unknown, a reason for concern given the current biodiversity crisis in the region. Information on the habitats where the species is found in the wild is scarce, with some sources conflicting. I aim to expand our current knowledge on the socioecology of T. margarita and the effects of human activities on it. Research was done at Veun Sai Siem Pang Conservation Area, Ratanakiri Province, Cambodia, from April 2013 until May 2014. An unhabituated group was followed for five days every week. Group size was estimated and their geographical position was marked every 30 minutes until the end of the day or the group was lost. Canopy layer and forest type were noted every time an individual was seen. When eating, plant part and species were identified to species level. Eight botanical transects of 5x200 meters were set up, classified by forest type and anthropic disturbance. Plants with a DBH of 12 cm or over were identified to species level. Biodiversity and Evenness indices were calculated for the habitat and each transect and compared. Langur visits to a mineral lick were recorded using camera traps. Group size, sex and age classes were counted, and morphological characters analysed for individual variability. Chainsaw numbers, length of logging in hours and distance from logging spots to the group were calculated daily. |
|
 |
PDF files are only accessible to Friends of the Cat Group. Joining Friends of the Cat Group gives you unlimited access and downloads in the Cat SG Library for one year, and allows you to receive our newsletter Cat News (2 regular issues per year plus special issues). More information how to join here |
(c) IUCN/SSC Cat Specialist Group ( IUCN - The World Conservation Union) |