The “takeover” of the highest rank found on Yakushima is seldom observed in other populations of Japanese macaques. In other areas, solitary males enter the group as the lowest-ranking male, and then gradually rank up as higher-ranking males emigrate from the group. Eventually, they too also emigrate from the group. On Yakushima, too, males which take over a group will eventually leave after staying with the group for several years.
■References (Books, papers, Web articles, etc.)
『霊長類学を学ぶ人のために』 西田利貞・上原重男編(世界思想社、1999)
『サルと歩いた屋久島』 山極寿一 (山と渓谷社、2006)
『野生ニホンザルの研究』 伊沢紘生 (どうぶつ社、2009)
「日本の霊長類-ニホンザル研究の歴史と展望」 山極寿一(『日本の哺乳類学2.中大型哺乳類・霊長類』所収 pp. 29~49 (東京大学出版会、2008))
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