卷尾猴（僧帽猴）使用物体作为锤子来打开坚果。
Use of objects as hammers to open nuts by capuchin monkeys (Cebus apella).
作者信息
Anderson J R
机构信息
Laboratoire de Psychophysiologie, Université Louis-Pasteur, Strasbourg, France.
出版信息
Folia Primatol (Basel). 1990;54(3-4):138-45. doi: 10.1159/000156437.
The use of stones as hammers to break open nuts was studied in a captive group of 7 Cebus apella. Only the single adult female and an infant showed no tool use. Tool use significantly reduced the time required to break open the nuts and obtain the kernel and led to fewer nuts being abandoned. Individual differences and social processes surrounding tool use are described. The development of tool use in a juvenile female is documented, along with the same female's novel use of a previously neglected object as a tool and the subsequent use of this object by the other members of the group.
在一个由7只白喉卷尾猴组成的圈养群体中，对用石头作为锤子敲开坚果的行为进行了研究。只有一只成年雌性和一只幼猴没有表现出工具使用行为。使用工具显著减少了敲开坚果获取果仁所需的时间，并且减少了被丢弃的坚果数量。文中描述了围绕工具使用的个体差异和社会过程。记录了一只幼年雌性猴子工具使用行为的发展，以及这只雌性猴子将一个先前被忽视的物体作为工具的新奇用法，以及该群体中其他成员随后对这个物体的使用情况。
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