Effects of food availability and its seasonal changes on the dietary habits of wild silvery lutungs (Trachypithecus cristatus) in a coastal forest in west Sumatra, Indonesia
Effects of food availability and its seasonal changes on the dietary habits of wild silvery lutungs (Trachypithecus cristatus) in a coastal forest in west Sumatra, Indonesia
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印度尼西亚苏门答腊岛西部沿海森林中食物供应及其季节变化对野生银鸫（Trachypithecus cristatus）饮食习惯的影响
DOI：
10.1163/14219980-20210703
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发表时间：
2022
影响因子：
1.9
通讯作者：
Tsuji Yamato
中科院分区：
文献类型：
--
作者：
Akbar Muhammad Azhari;Rizaldi;Perwitasari-Farajallah Dyah;Tsuji Yamato
灵长类动物的食物组成往往受到食物的可获得性以及栖息地内的季节变化的影响。这项研究提供了生活在印度尼西亚西苏门答腊岛沿海森林中的野生银色琵琶(Trachypithecus Criatus)的取食行为的定量数据。这项研究强调了食物可获得性与季节变化之间的关系。还研究了这些灵长类动物的摄食策略。从2018年8月至2019年7月，对一群野生银色鹿洞的取食行为进行了为期12个月的观察，总观察时间为482小时。我们记录了来自37种不同植物的74种食物，这些食物包括在鲁通人的饮食中。37种植物中有19种占鲁东地区年食量的1%。因此，它们可以被认为是鲁通族的主要植物食物来源。鲁东主要取食幼叶(68.3%)。然而，在某些月份，成熟和未成熟的水果构成了它们饮食的主要部分。基于植物部分的分析表明，幼叶的可获得性与成熟果实的取食呈负相关。基于植物种类的分析表明，主要饲料项目(主要是幼叶)的摄食百分比与其可获得性之间几乎没有显著的正相关关系。这意味着幼叶和成熟果实既是喜好的食物，也是备用的食物。这也表明，吕东活动、射程模式和研究地点的活动主要受食物分布和可获得性的影响。需要进行进一步的研究，以增加对亚洲柯丁鱼的摄食策略、摄食模式和食物资源特征的了解。
The dietary composition of primates is often affected by the availability of food, as well as seasonal variations within their habitat. This study presents quantitative data on the feeding behavior of wild silvery lutungs (Trachypithecus cristatus) inhabiting a coastal forest in West Sumatra, Indonesia. This research emphasizes the relationship between food availability and the way this changes by season. Feeding strategies of these primates was also examined. Feeding behavior of a group of wild silvery lutungs was observed for 12 months from August 2018 to July 2019, with a total observation time of 482 hours. We recorded 74 items from 37 different plant species that were included in the lutungs’ diet. Nineteen out of 37 plant species comprised > 1% of the lutung’s annual diet. They can therefore be considered the main plant food sources for the lutungs. The lutungs mainly fed on young leaves (68.3%). However, during certain months, both ripe and unripe fruit formed a major part of their diet. Plant part-based analyses showed a negative correlation between the availability of young leaves and ripe fruit feeding. Plant species-based analyses revealed few significant positive relationships between the feeding percentages of the main dietary items (mainly young leaves) and their availability. This implies that young leaves and ripe fruit were both the preferred and the fallback foods. This also indicates that lutung activity, ranging patterns, and activity at the study site are affected mainly by food distribution and availability. Further research is needed to increase the understanding of Asian colobine feeding strategies, feeding patterns, and food resource characteristics.