Title
Preliminary Results of Orangutan Distribution using Occupancy Modelling at the Sedilu-Sebuyau-Lesong Landscape in Sarawak
Author(s)
Pandong, Joshua; Balang, Mary; Anyie, Yonny; Manggat, Melyen; Ng, Sylvia; Gumal, Melvin; Rayan, D. Mark
Published
2022
Abstract
The knowledge on orangutan distribution is currently imperfect and investigation into methods such as occupancy modelling could be used to map orangutan occurrence over time and space. For this pilot study, we spatially indexed 303 hexagonal tiles, each 1 km2 in size, to represent plots over the Sedilu-Sebuyau-Lesong (SSL) landscape. We integrated rapid assessments of orangutan nest and occupancy modelling to generate proxy orangutan distribution for the survey period between July 2018 to November 2019. Preliminary results showed an estimate of 11%-22% probability of orangutans occupying 13 out of the 303 hexagonal tiles. These predicted occupied hexagonal tiles represent areas that are around the Ulu Sebuyau National Park and its proposed extension. Our study not only aids in refining monitoring methodology but also guides where management interventions are most needed to ensure the long-term survival of orangutans within the landscape.
Keywords
Bornean orangutan; hexagonal tiles; occupancy modelling; rapid assessment; Sarawak
Full Citation
Pandong, J., M. Balang, Y. Anyie, M. Manggat, S. Ng, M. Gumal, and D.M. Rayan (2022). Preliminary Results of Orangutan Distribution using Ocupancy Modelling at the Sedilu-Sebuyau-Lesong Landscape in Sarawak. Malaysia Conservation Conference, 29-31 March 2022. Kuching, Sarawak, Malaysia: Sarawak Forestry Corporation.

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