Wild primates copy higher-ranked individuals in a social transmission experiment

Charlotte Canteloup (), William Hoppitt and Erica van de Waal
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Charlotte Canteloup: University of Lausanne
William Hoppitt: University of Leeds
Erica van de Waal: University of Lausanne

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Little is known about how multiple social learning strategies interact and how organisms integrate both individual and social information. Here we combine, in a wild primate, an open diffusion experiment with a modeling approach: Network-Based Diffusion Analysis using a dynamic observation network. The vervet monkeys we study were not provided with a trained model; instead they had access to eight foraging boxes that could be opened in either of two ways. We report that individuals socially learn the techniques they observe in others. After having learnt one option, individuals are 31x more likely to subsequently asocially learn the other option than individuals naïve to both options. We discover evidence of a rank transmission bias favoring learning from higher-ranked individuals, with no evidence for age, sex or kin bias. This fine-grained analysis highlights a rank transmission bias in a field experiment mimicking the diffusion of a behavioral innovation.

Date: 2020
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DOI: 10.1038/s41467-019-14209-8

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