HOPE report

Number:20-003-2

Investigation of Ecology and Social Structure of Proboscis Monkeys in Lower Kinabatangan

Report:Matsuda Ikki

Date:2008/11/24 - 2008/12/08

To better understand ecology and social structure of proboscis monkeys, I studied harem groups of proboscis monkeys in Lower Kinabatangan Wildlife Sanctuary since January 2005. The purpose of this trip was to collect mature and young leaves from 20 species with the largest total basal area in our vegetation survey area (total 2. 15 ha). After completing sample collection, I dried all leaf samples at the Forest Research Center, Sabah, Malaysia, and obtained permission from the director of Herbarium Section to bring plant samples back to Japan. Nutritional analysis of samples collected on this trip will be conducted in Japan. In addition to leaf sampling, boat-based survey was conducted along the Menanggul River. Further, I visited the Sabah Wildlife Department and the Institute for Tropical Biology and Conservation, University Malaysia Sabah and discussed findings from this research with Malaysian collaborators.

Leaf samples after drying at Forest Research Center (Dipterocarpus validus)


Leaf samples after drying at Forest Research Center (Dracontomelon dao)

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