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In-group conformity sustains different foraging traditions in capuchin monkeys (Cebus apella)

Research output: Contribution to journalArticle

Author(s)

Marietta Dindo, Andrew Whiten, Frans B M de Waal

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Abstract

Background: Decades of research have revealed rich cultural repertoires encompassing multiple traditions in wild great apes, a picture crucially complemented by experimental simulations with captive apes. Studies with wild capuchin monkeys, the most encephalized simian species, have indicated a New World convergence on these cultural phenomena, involving multiple traditions and tool use. However, experimental studies to date are in conflict with such findings in concluding that capuchins, like other monkeys, show minimal capacities for social learning. Methodology/Principal Findings: Here we report a new experimental approach in which the alpha male of each of two groups of capuchins was trained to open an artificial foraging device in a quite different way, using either a slide or lift action, then reunited with his group. In each group a majority of monkeys, 8 of 11 and 13 of 14, subsequently mastered the task. Seventeen of the successful 21 monkeys discovered the alternative action to that seeded in the group, performing it a median of 4 times. Nevertheless, all 21 primarily adopted the technique seeded by their group's alpha male. Median proportions of slide versus lift were 0.96 for the group seeded with slide versus 0. 01 for the group seeded with lift. Conclusions/Significance: These results suggest a striking effect of social conformity in learned behavioral techniques, consistent with field reports of capuchin traditions and convergent on the only other species in which such cultural phenomena have been reported, chimpanzees and humans.
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Details

Original languageEnglish
Article numbere7858
JournalPLoS One
Volume4
Issue number11
DOIs
StatePublished - Nov 2009

    Research areas

  • Capuchin monkeys, Tool use, Animal culture, Social learning, Foraging, Social conformity

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