ENGLISH トップ 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 国際集会 教育,入試 広報,公開行事,年報 新着論文,出版 教員,職員公募 国際共同事業 霊長類研究基金 リンク アクセス HANDBOOK FOR INTERNATIONAL RESEARCHERS Map of Inuyama サイトマップ
コラム・連載 質疑応答コーナー ボノボ チンパンジー「アイ」 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.



Dispersal of a Human-Cultivated Crop by Wild Chimpanzees (Pan troglodytes verus) in a Forest ? Farm Matrix
Kimberley J. Hockings, Gen Yamakoshi, Tetsuro Matsuzawa

With the conversion of natural habitats to farmland, nonhuman primates (hereafter primates) are increasingly exposed to agricultural crops. Although frugivorous primates are important seed dispersers that sometimes feed on agricultural fruits, evidence for dispersal of crops by primates is lacking. Here, we examine flexible feeding on cacao (Theobroma cacao) fruit and seed dispersal patterns by chimpanzees (Pan troglodytes verus) at Bossou in Guinea, and consequent cacao germination and survival. From direct observations, we confirm that cacao fruit is not an important food to chimpanzees, representing 0.23 % of focal animal feeding time. Chimpanzees ingest cacao pulp and either spit out the large seeds intact from unripe cacao fruit or swallow the seeds from ripe cacao fruits, which are consequently deposited in feces. From ecological surveys we show that chimpanzees distributed cacao extensively throughout their home range, at a mean distance of 407 m ± SE 0.6 (N = 90 clusters, range: 4-1130 m) from cacao plantations. As distance from the cacao plantation increased, cacao plants were more likely to survive. Other factors, including number of cacao plants in a cluster, plant height, and openness of the understory did not predict short-term cacao survival. Cacao plants within the forest did not produce fruit. By contrast, when chimpanzees deposited seeds in a plantation, cacao plants produced fruits as a result of farmers' maintenance of the area. Our local-scale findings emphasize the complex behavioral and ecological interconnections between coexisting humans and primates in agricultural landscapes and generate interesting questions regarding primate niche construction and crop "ownership" related to who "plants" the crop.

Int J Primatol
DOI 10.1007/s10764-016-9924-y
2016/11/04 Primate Research Institute