One of the goals for primate feeding ecology is to understand the factors that affect inter- and intra-specific variations. Therefore, a detailed description of basic feeding ecology in as many populations as possible is necessary and warrants further understanding. The black-and-white colobus (Colobus guereza) or guereza is widely distributed in Africa and is one of the well-studied colobines in terms of their feeding; they demonstrate considerable variation in their diets in response to local conditions. We studied the diet of a group of guerezas in the Kalinzu Forest, Uganda, for over 30 consecutive months using behavioral observation (4308 h in total), phenology, and vegetation surveys. A total of 31 plant species were consumed by the study group. This study group was predominantly folivorous; the majority of their feeding time was involved in feeding on young leaves (87%). However, during certain times of the year, fruits and seeds accounted for 45% of monthly feeding time. Young leaves of Celtis durandii were by far the most important food, which constituted 58% of the total feeding records. There was a significant increase in the consumption of fruits and flowers once young leaf availability was low, but their consumption of fruits did not significantly increase even when fruit availability was high. Their monthly dietary diversity increased as the number of available plants with young leaves declined, suggesting that much of the dietary diversity in the study group may be attributable to the young leaf portion of their diet. Our findings may help contribute to a better understanding of the dietary adaptations and feeding ecology of guerezas in response to local environmental conditions.

中文翻译：

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乌干达卡林祖森林黑白疣猴（Colobus guereza）的饮食和摄食行为

灵长类动物饲养生态学的目标之一是了解影响种间和种内变异的因素。因此，有必要详细描述尽可能多的种群的基本饲养生态学，并保证进一步了解。黑白疣猴 (Colobus guereza) 或 guereza 广泛分布于非洲，是在进食方面得到充分研究的疣猴之一；根据当地条件，他们的饮食表现出相当大的变化。我们使用行为观察（总共 4308 小时）、物候学和植被调查连续 30 多个月研究了乌干达 Kalinzu 森林中一群 guerezas 的饮食。研究组共食用了 31 种植物。该研究组主要是食叶的；他们的大部分喂食时间都用于喂食幼叶（87%）。然而，在一年中的某些时期，水果和种子占每月喂食时间的 45%。Celtis durandii 的幼叶是迄今为止最重要的食物，占总饲养记录的 58%。一旦幼叶供应量低，水果和花卉的消费量会显着增加，但即使水果供应量高，他们的水果消费量也没有显着增加。他们每月的饮食多样性随着具有幼叶的可用植物数量的减少而增加，这表明研究组的大部分饮食多样性可能归因于他们饮食中的幼叶部分。