Diet analysis of sympatric colobine monkeys from Bako National Park, Sarawak, Borneo

Wan Nur Syafinaz Wan-Azman and Norfarhana Mazlan and Henry Bernard and Sundai Silang and Mohamad Kasyfullah Zaini and Faisal Ali Anwarali Khan (2022) Diet analysis of sympatric colobine monkeys from Bako National Park, Sarawak, Borneo. Borneo Journal of Resource Science and Technology, 12 (1). pp. 157-165. ISSN 2229-9769

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Abstract

Habitat quality and abundant of food resources are among the key factors influencing the continued existence of primates in the wild. Although much has been studied on primate habitats and their diets, little is known about the nutritional value of the colobines’ foods. This study aimed to assess the dietary nutrient compositions of two sympatric colobine monkeys, Trachypithecus cristatus and Nasalis larvatus, in Bako National Park using proximate analysis of faecal, leaf and fruit samples of eight dominant tree species in Bako NP. Five nutrient parameters, namely crude protein, crude fat, crude fibre, ash, phosphorus, and energy content, were choosen to assess the nutritional demands of the monkeys in the wild. The faecal samples showed significantly higher percentage of crude fibre (27.58%) in N. larvatus compared to T. cristatus. In contrast, crude fat (8.52%), ash content (1.79%) and phosphorus (5.76 mg/g) were found to be significantly higher in the faecal samples of T. cristatus than in N. larvatus. The nutrient composition of leaves samples from the tree species consumed by N. larvatus and T. cristatus showed a significantly higher percentage of crude protein (14.56%) in Barringtonia asiatica (sea poison tree) and higher ash (13.70%) in Morinda citrifolia (Indian mulberry). Meanwhile, nutrient composition in fruit samples showed highest percentage of crude fibre (32.58%) and crude fat (12.35%) in Calophyllum inophyllum (Alexandrian laurel), whereas higher phosphorus (5.76%) and energy (24.26 KJ) were recorded in Ceriops tagal (Yellow mangrove). The higher crude fiber detected in N. larvatus’ faecal samples compared to T. cristatus may indicates that N. larvatus experiences lower digestibility as they are incapable of completely digesting the tough leaves or fruits. This study provides useful information for the conservation and management of these primate species especially on their dietary requirements in captivity or in a new habitat.

Item Type:	Article
Keyword:	Food Intake , Nutrition , Proboscis monkey , Silvered langur
Subjects:	Q Science > QL Zoology > QL1-991 Zoology > QL750-795 Animal behavior
Department:	INSTITUTE > Institute for Tropical Biology and Conservation
Depositing User:	SAFRUDIN BIN DARUN -
Date Deposited:	28 Oct 2022 15:19
Last Modified:	28 Oct 2022 15:19
URI:	https://eprints.ums.edu.my/id/eprint/34610

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