Fragaszy Dorothy M, Boinski Sue
U Georgia, Dept of Psychology, Athens.
J Comp Psychol. 1995 Dec;109(4):339-348. doi: 10.1037/0735-7036.109.4.339.
Capuchin monkeys (Cebus olivaceus) exhibit extensive intragroup variability in foraging and diet. To consider how age, sex, and individual identity contribute to this variability, the authors examined foraging and diet in 18 wedge-capped capuchin monkeys in 1 social group in the wild. Age-sex classes did not differ in the time spent ingesting food, the reliance on plant foods, the foraging actions used or substrates exploited, or in the efficiency of exploiting animal foods. They did differ, however, in the time spent finding food, time devoted to animal foods and to vigorous foraging, and the efficiency of foraging. The sexes differed more than age groups. Individual differences within age-sex class were less extensive than expected and were more evident in juveniles than adults. Within-group variability in foraging reflected catholic selection and equivalent treatment of substrates by all individuals, rather than individual specializations.
卷尾猴（Cebus olivaceus）在觅食和饮食方面表现出广泛的群体内变异性。为了探究年龄、性别和个体身份如何导致这种变异性，作者对野生一个社会群体中的18只楔冠卷尾猴的觅食和饮食进行了研究。年龄 - 性别类别在进食时间、对植物性食物的依赖程度、所使用的觅食行为或所利用的基质，以及利用动物性食物的效率方面没有差异。然而，它们在寻找食物的时间、用于动物性食物和积极觅食的时间，以及觅食效率方面存在差异。性别之间的差异比年龄组之间的差异更大。年龄 - 性别类别内的个体差异不如预期的广泛，并且在幼猴中比成年猴中更明显。群体内觅食的变异性反映了所有个体对基质的广泛选择和同等对待，而不是个体特化。
