著者

村山 司 藤井 有希 勝俣 浩 荒井 一利 祖一 誠

出版者

日本認知科学会

雑誌

認知科学 (ISSN:13417924)

巻号頁・発行日

vol.15, no.3, pp.358-365, 2008 (Released:2010-02-15)

参考文献数

22

被引用文献数

6

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Dolphins are known to exhibit highly developed social interactions, and numerous high advanced social behaviors have been observed in their school. We conducted a variety of tasks to understand the cognitive abilities of beluga (Delphinapterus leucas). Symmetry, a cognitive ability that is only present in a few nonhuman animals, was tested in a male beluga ten years ago (1997). At that time, however, it was found that the subject performed poorly. Here we report the results of our observations which set about to determine whether cognitive mechanisms, such as symmetry, could be altered or developed over a relatively long period of time (i.e. 10 years). We used the same beluga that was used for the symmetry tests conducted 10 years previously. Using the same procedures employed in the first test, the subject was observed to exhibit symmetry. Since the subject has been engaged in a variety of cognitive tasks other than tests of symmetry over the past 10 years, it is proposed that these experiences have positively influenced the development of symmetry in this animal.

著者

村山司 祖一誠 内田詮三編著

出版者

東海大学出版会

巻号頁・発行日

2010

著者

村山司著

出版者

講談社

巻号頁・発行日

2013