著者

Camille PENE Akiho MURAMATSU Tetsuro MATSUZAWA

出版者

Primate Society of Japan

雑誌

霊長類研究 Supplement

巻号頁・発行日

pp.105, 2015-06-20 (Released:2016-02-02)

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Numerous studies have shown that chimpanzees have the same color vision as humans. Colorblindness also exist in chimpanzees, and some individuals have been proved to be colorblind through genetic tests or modified Ishihara tests. More and more apes are trained to use touch screen as research or enrichment purpose. Among the task they achieve, matching to sample is one of more common. Could we detect unusual color perception in a chimpanzee from a basic color-color matching-to-sample (MTS) task ? From June to August 2012, we tested 7 Chimpanzees from Kyoto University Primate Research Institute with color to color MTS in order to explore their color perception. Ten colors were used and two tests were run : first one offered 10 alternatives to match with the sample and second one only two. Mistakes during those tests and latency to answer were considered as witnesses of color confusion. From the data we obtained, we built a dendrogram showing color relationship in chimpanzee's perception and graphics detailing those relationships. Individual differences were also noted and, among those, abnormal perception in one of the chimpanzee could not be excluded. This study confirm that color perception in chimpanzee is indeed really close from the human's one. It also bring up the possibility of a kind of colorblindness in one of the subject. This should be explored in following studies.