Both Western and Japanese primatologists began fieldwork on mountain gorillas, but “food provisioning,” which was a successful technique with Japanese macaques, was not effective with gorillas, who never accepted the food provided by humans. However, George Schaller succeeded in demonstrating “habituation* ” by repeatedly presenting himself to gorillas without using food.

■References (Books, papers, Web articles, etc.)
The Year of the Gorilla　　George B. Schaller　University of Chicago Press; First Edition, Reissue, With a New Postscript edition (October 30, 2010)
『ゴリラ探検記　新装版』　河合雅雄　（講談社学術文庫、1984）

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*A method to make animals accustomed to human presence by tracking them daily without feeding them.

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