Activity Pattern, Time Budget and Diet of Silvered Leaf Langur (Presbylis cristata) at Bako National Park, Sarawak

Mohd Farhan Ihsan, Ab. Aziz (2007) Activity Pattern, Time Budget and Diet of Silvered Leaf Langur (Presbylis cristata) at Bako National Park, Sarawak. [Final Year Project Report] (Unpublished)

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Abstract

The activity pattern, time budget and diet of silvered leaf langur (Presbytis cristata) were studied at Telok Assam, Bako National Park, Sarawak. This study was done on two separate sampling occasions; first sampling on 28 August 2006 until 1 September 2006 and second sampling on 23 November 2006 until 29 November 2006. Bako National Park was gazetted in 1957 and is the oldest national park in Sarawak, located at the Muara Tebas Peninsula, about 30 km north of Kuching city, southwest Sarawak. Behaviour of P. cristata was recorded by using the group scanning method and focal sampling. During the twelve days field sampling from 0600 hours until 1800 hours, 3334 minutes were spent observing the behaviour of P. crisstata. The result indicated that 1 145 minutes (34.34%) of the half day was spent moving, 990 minutes (29.69%) was spent resting, 655 minutes (19.65%) was spent feeding, 395 minutes (11.85%) was spent socializing and 149 minutes (4.47%) was spent foraging. P. eristata selected Biansu tree at the boat shed, Ubah tree (Sv_gium sp. ) and Otak Udang tree (Buchanania sp. ) behind the Park Headquarters as their sleeping sites. Their diet composed of the flowers, young leaves, buds, and barks of Baru Laut tree (Hibiscus tiliaceus), young leaves of Otak Udang tree (Buchanania sp. ), young leaves of Leban tree (l'itex pubescens), leaves and fruits of Pandan (Pandanus sp. ), fruits of Biansu tree and young leaves of Paku Kubok (Nephrolepis biserrata).

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