Wild capuchin monkeys (Cebus libidinosus) use anvils and stone pounding tools

@article{Fragaszy2004WildCM,
  title={Wild capuchin monkeys (Cebus libidinosus) use anvils and stone pounding tools},
  author={Dorothy Munkenbeck Fragaszy and Patr{\'i}cia Izar and Elisabetta Visalberghi and Eduardo B. Ottoni and Marino Gomes de Oliveira},
  journal={American Journal of Primatology},
  year={2004},
  volume={64}
}
We conducted an exploratory investigation in an area where nut‐cracking by wild capuchin monkeys is common knowledge among local residents. In addition to observing male and female capuchin monkeys using stones to pound open nuts on stone “anvils,” we surveyed the surrounding area and found physical evidence that monkeys cracked nuts on rock outcrops, boulders, and logs (collectively termed anvils). Anvils, which were identified by numerous shallow depressions on the upper surface, the presence… Expand
Characteristics of hammer stones and anvils used by wild bearded capuchin monkeys (Cebus libidinosus) to crack open palm nuts.
TLDR
Wild capuchins provide a new reference point for interpreting early percussive stone tool use in hominins, and a point of comparison with chimpanzees cracking nuts. Expand
The manifold use of pounding stone tools by wild capuchin monkeys of Serra da Capivara National Park, Brazil
The use of pounding stone tools (PSTs) is a customary behaviour in several wild populations of capuchin monkeys; most of these monkeys use PSTs primarily to open hard palm nuts. Here, we describe theExpand
Spontaneous Tool Use by Wild Capuchin Monkeys (Cebus libidinosus) in the Cerrado
TLDR
It is proposed that the probability of the emergence of the use of pounding stones as tools may be dependent on the ecological variables that influence the degree of terrestriality and extractive foraging and the complex interaction of these factors. Expand
Stone tool use by adult wild bearded capuchin monkeys (Cebus libidinosus). Frequency, efficiency and tool selectivity.
TLDR
It is argued that the contrasting pattern of sex differences in capuchins compared with chimpanzees, in which females use tools more frequently and more skillfully than males, may have arisen from the degree of sexual dimorphism in body size of the two species, which is larger in capuchin monkeys than in chimpanzees. Expand
Wild bearded capuchin monkeys (Cebus libidinosus) place nuts in anvils selectively
Are wild bearded capuchin monkeys selective about where they place nuts on anvils, specifically the anvil pits, during nut cracking? In the present study, we examined (1) whether capuchins’Expand
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Capuchin monkeys (Sapajus spp.) are proficient tool users, and the use of stone tools occurs in several populations, mostly to crack open encased foods. Two well-studied Brazilian populations ofExpand
How wild bearded capuchin monkeys select stones and nuts to minimize the number of strikes per nut cracked
Wild bearded capuchin monkeys, Cebus libidinosus, use stone tools to crack palm nuts to obtain the kernel. In five experiments, we gave 10 monkeys from one wild group of bearded capuchins a choice ofExpand
Cashew Nut Positioning during Stone Tool Use by Wild Bearded Capuchin Monkeys (Sapajus libidinosus)
TLDR
Wild capuchin monkeys at Serra da Capivara National Park, Brazil, regularly use stone tools to break open cashew nuts, and this relatively rare behaviour appears to have a complex ontogeny, but further studies are required to establish the extent to which social learning is involved. Expand
How bearded capuchin monkeys (Sapajus libidinosus) prepare to use a stone to crack nuts
TLDR
Two new aspects of the capuchins’ nut‐cracking are highlighted: Anticipatory actions with the stone before striking, especially when the stone is larger or unfamiliar, and when initiating striking and (b) shifting grips on the stone during a strike. Expand
Adult and juvenile bearded capuchin monkeys handle stone hammers differently during nut‐cracking
TLDR
It is shown that young monkeys control the trajectory of a stone adequately but that is not sufficient to crack nuts as effectively as adults do, and perceptual learning about these aspects of percussion occurs slowly. Expand
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