Ontogeny of a social custom in wild chimpanzees: age changes in grooming hand-clasp at Mahale.


Among cultural behaviors of chimpanzees, the developmental processes of complex skills involved in tool use are relatively well known. However, few studies have examined the ontogeny of social customs that do not require complex skills. Thus, in this study, we describe the developmental process of the grooming hand-clasp (GHC), one of the well-known social… (More)
DOI: 10.1002/ajp.22098

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