Potato washing transmitted to other group members

Over time, the potato washing behavior “developed” by the young female was transmitted to other macaques in the group. It first spread to relatives and members of similar ages, and then from younger to older individuals (as opposed to much of human culture). This “pre-culture” did not seem to be learned by teaching, but through the imitation each other’s’ behavior.

■References (Books, papers, Web articles, etc.)
『ニホンザルの生態』　　河合雅雄　（河出書房新社、1969）
「行動の社会伝達―ニホンザルを具体例にして―」　　田中伊知郎（『霊長類学を学ぶ人のために』184～202ページ所収　西田利貞・上原重男編　（世界思想社、1999））

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■The References list of “Evolution of Human Sociality”