所長挨拶 概要 教員一覧 研究分野・施設 共同利用・共同研究 大型プロジェクト 教育,入試 広報,公開行事,年報 新着論文,出版 霊長類研究基金 リンク アクセス HANDBOOK FOR INTERNATIONAL RESEARCHERS Map of Inuyama
お薦めの図書 質疑応答コーナー ボノボ チンパンジー「アイ」 行動解析用データセット 頭蓋骨画像データベース 霊長類学文献データベース サル類の飼育管理及び使用に関する指針 Study material catalogue/database 野生霊長類研究ガイドライン 霊長類ゲノムデータベース 写真アーカイヴ ビデオアーカイヴ

TEL. 0568-63-0567(大代表)
FAX. 0568-63-0085

Copyright (c)
Primate Research Institute,
Kyoto University All rights reserved.



First records of tool-set use for ant-dipping by Eastern chimpanzees (Pan troglodytes schweinfurthii) in the Kalinzu Forest Reserve, Uganda
Chie Hashimoto, Mina Isaji, Kathelijne Koops, Takeshi Furuichi

Chimpanzees at numerous study sites are known to prey on army ants by using a single wand to dip into the ant nest or column. However, in Goualougo (Republic of Congo) in Central Africa, chimpanzees use a different technique, use of a woody sapling to perforate the ant nest, then use of a herb stem as dipping tool to harvest the army ants. Use of a tool set has also been found in Guinea, West Africa: at Seringbara in the Nimba Mountains and at nearby Bossou. There are, however, no reports for chimpanzees in East Africa. We observed use of such a tool set in Kalinzu, Uganda, for the first time by Eastern chimpanzees. This behavior was observed among one group of chimpanzees at Kalinzu (S-group) but not among the adjacent group (M-group) with partly overlapping ranging areas despite the fact that the latter group has been under intensive observation since 1997. In Uganda, ant-dipping has not been observed in the northern three sites (Budongo, Semliki, and Kibale) but has been observed or seems to occur in the southern sites (Kalinzu and Bwindi), which suggests that ant-dipping was invented by and spread from the southern region after the northern and southern forest blocks became separated. Use of a tool-set by only one group at Kalinzu further suggests that this behavior was recently invented and has not yet spread to the other group via migrating females.

Springer Japan
DOI 10.1007/s10329-015-0478-y


2015/08/24 Primate Research Institute