Food Composition and Preference of Captive Javan Langur (Trachypithecus auratus) in Gembira Loka Zoo, Yogyakarta

Eunnike Adelina, Laurentia Henrieta Permita Sari Purba, V. C. Prakasita
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Abstract

Javan langur (Trachypithecus auratus) is one of the endemic primate species of Indonesia. Its populations were exposed to extinction risk caused by human activities. Thus, conservation efforts such as ex-situ conservation were needed to preserve this species. One of the javan langur ex-situ conservation in Yogyakarta is the Gembira Loka Zoo. In captivity, animals must be guaranteed to be free from hunger and stay nourished. One aspect to support this welfare is food supply. Therefore, this study aimed to identify the food composition and analyze the correlation between food preference and feeding duration of each food item group. We used scan animal sampling method with five minutes intervals to observe the behavior of seven individuals of captive javan langurs. The result showed that there are three groups of food (fruit, vegetable, and leaf) provided daily to javan langurs in Gembira Loka Zoo. All the individuals spent most their time to consumed food from vegetable group, except for infant female who had the highest duration in the leaf group. In addition, based on which food they consumed first every feeding time (preference food), javan langurs preferred vegetable over fruit and leaf. Based on the Spearman correlation test, there are positive correlations of duration and preference of feeding except for leaf groups. This result was different from the natural food composition of javan langurs which mostly consisted of leaves. This study might help the zoo to consider the food items provided for the animals to increase animal welfare.
日惹 Gembira Loka 动物园圈养的爪哇蓝猴(Trachypithecus auratus)的食物组成和偏好
爪哇叶猴(Trachypithecus auratus)是印度尼西亚特有的灵长类动物之一。其种群面临着因人类活动而灭绝的危险。因此,需要采取原生境保护等保护措施来保存这一物种。日惹 Gembira Loka 动物园是爪哇叶猴的异地保护地之一。在圈养条件下,必须保证动物免于饥饿并保持营养充足。支持这种福利的一个方面就是食物供应。因此,本研究旨在确定食物成分,并分析每组食物的食物偏好和喂食时间之间的相关性。我们采用动物扫描取样法,以五分钟为间隔,观察了七只圈养爪哇叶猴的行为。结果表明,根比拉洛卡动物园每天为爪哇叶猴提供三类食物(水果、蔬菜和树叶)。除了雌性幼猴在叶类食物上花费的时间最长外,所有个体在蔬菜类食物上花费的时间都最长。此外,根据每次进食时首先食用的食物(偏好食物),爪哇叶猴偏好蔬菜而非水果和树叶。根据斯皮尔曼相关性检验,除树叶组外,喂食持续时间与喂食偏好均呈正相关。这一结果与爪哇叶猴的天然食物成分(主要是树叶)不同。这项研究可能有助于动物园考虑为动物提供的食物,以提高动物福利。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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