Social foraging and the finder's share in capuchin monkeys, Cebus apella
Social foraging and the finder's share in capuchin monkeys, Cebus apella
复制标题
DOI：
10.1006/anbe.2000.1730
复制
发表时间：
2001-07-01
期刊：
影响因子：
2.5
通讯作者：
Janson, CH
中科院分区：
文献类型：
--
作者：
Di Bitetti, MS;Janson, CH
集体生活可以给个人带来优势，但也可能通过资源竞争带来严重的成本。盗寄生症是一个例子，在这种情况下，一些人(木匠)可以利用其他动物(发现者)发现的食物。这种类型的社交觅食要么被建模为信息共享模式，要么被建模为生产者-搜索者游戏。这些模型中的一个重要变量是发现者的优势：发现者在其他人到达之前获得的物品数量。在这项研究中，我们描述了一群野生簇毛卷尾猴个体的空间位置和等级如何影响它们发现和开发新食物来源的能力。我们还分析了影响发现者份额的因素以及发现者从新发现的资源中获得的食物总量。通过将装满香蕉的平台放置在它们家乡范围内的新位置，我们表明，处于觅食群体前沿的动物比占据其他空间位置的动物有更高的机会发现新的食物来源。倾向于占据中锋位置的阿尔法雄性和阿尔法雌性能够垄断新发现的食物来源，从而获得其中的主要份额。当一个平台上有更多的食物时，捕食者在喂食平台上的份额较小，但在其他个体到达之前，随着延迟时间的延长，寻获者的份额会增加。当觅食平台上的食物越多，寻获者的社会地位越高，其他个体到达的时间越长，寻获者从觅食平台获得的食物总量就越大。动物可以通过保持较大的个体间距离和避免向其他动物发出食物存在的提示(如与食物相关的发声)，来增加它们从新发现的资源中寻找食物的份额和总消耗量。(C)2001年动物行为研究协会。
Group living can confer advantages to individuals, but it can also impose severe costs through resource competition. Kleptoparasitism is one example in which some individuals (joiners) can exploit the food discovered by other animals (finders). This type of social foraging has been modelled either as an information-sharing model or as a producer-scrounger game. An important variable in these models is the finder's advantage: the number of items obtained by the finder before the arrival of other individuals. In this study we describe how the spatial position and rank of individuals in a group of wild tufted capuchin monkeys affect their ability to discover and exploit new food sources. We also analyse the factors that affect the finder's share and the total amount of food obtained by the finder from a newly discovered resource. By placing platforms filled with bananas at novel locations in their home range, we show that animals in the leading edge of a foraging group have a higher probability of discovering new food sources than animals occupying other spatial positions. The alpha male and the alpha female, which tended to occupy central-forward positions, were able to monopolize newly discovered food sources and thus obtain a major share of them. The finder's share at the feeding platforms was smaller when there was more food on a platform, but increased with longer delays before the arrival of other individuals. The total amount of food obtained by the finder from the feeding platforms was larger when there was more food on the platform, when the finder was of higher social status, and when it took longer for other individuals to arrive. Animals can increase their finder's share and total amount consumed from a newly discovered resource by keeping large interindividual distances and by avoiding giving cues about the presence of food (such as food-associated vocalizations) to other animals. (C) 2001 The Association for the Study of Animal Behaviour.