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Introducing tool-based feeders to zoo-housed chimpanzees as a cognitive challenge: spontaneous acquisition of new types of tool use and effects on behaviours and use of space.
  Yamanashi, Yumi; Matsunaga, Masayuki; Shimada, Kanae; Kado, Ryuichiro; Tanaka, Masayuki (2016-08)
  Journal of Zoo and Aquarium Research (JZAR), 4(3): 147-155
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Cortisol analysis of hair of captive chimpanzees (Pan troglodytes).
  Yamanashi, Yumi; Morimura, Naruki; Mori, Yusuke; Hayashi, Misato; Suzuki, Juri (2013-09-05)
  General and comparative endocrinology, 194: 55-63
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Social relationship and hair cortisol level in captive male chimpanzees (Pan troglodytes)
  Yamanashi, Yumi; Teramoto, Migaku; Morimura, Naruki; Nogami, Etsuko; Hirata, Satoshi (2018-3)
  Primates, 59(2): 145-152
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Common marmoset (Callithrix jacchus) personality, subjective well-being, hair cortisol level and AVPR1a, OPRM1, and DAT genotypes
  Inoue-Murayama, Miho; Yokoyama, Chihiro; Yamanashi, Yumi; Weiss, Alexander (2018-07-06)
  Scientific Reports, 8
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Effects of Relocation and Individual and Environmental Factors on the Long-Term Stress Levels in Captive Chimpanzees (Pan troglodytes): Monitoring Hair Cortisol and Behaviors
  Yamanashi, Yumi; Teramoto, Migaku; Morimura, Naruki; Hirata, Satoshi; Inoue-Murayama, Miho; Idani, Gen'ichi (2016-07-27)
  PLOS ONE, 11(7)
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Analysis of hair cortisol levels in captive chimpanzees: Effect of various methods on cortisol stability and variability
  Yamanashi, Yumi; Teramoto, Migaku; Morimura, Naruki; Hirata, Satoshi; Suzuki, Juri; Hayashi, Misato; Kinoshita, Kodzue; Murayama, Miho; Idani, Gen'ichi (2016)
  MethodsX, 3: 110-117
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