Dominance among male chimpanzees in the Mahale Mountains National Park,Tanzania: A preliminary study |
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Authors: | Hitoshige Hayaki Michael A Huffman Toshisada Nishida |
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Institution: | (1) Laboratory of Human Evolution Studies, Faculty of Science, Kyoto University, Sakyo-ku, 606 Kyoto, Japan;(2) Department of Zoology, Faculty of Science, Kyoto University, Sakyo-ku, 606 Kyoto, Japan |
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Abstract: | Dominance relationships among male chimpanzees in the Mahale Mountains National Park, Tanzania, were analyzed. Although all
adolescent males were unequivocally subordinate to all adult males, dominance relationships within the age classes were much
less clear. Especially among adolescent males, few pant-grunts or agonistic interactions occurred. While adolescent males
frequently pant-grunted at adult males, these latter males, except the alpha and the youngest, rarely pant-grunted to one
another. This suggests that a difference of social status exists between adolescent and adult males. Adult males rarely display
overt dominance to one another probably because the presence of other males affects their interactions. Moreover, they seem
to try to keep their dominance relationship ambiguous when making it overt is not advantageous to them. This may be a political
way for males to coexist with one another in a unit-group. |
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Keywords: | Pan troglodytes schweinfurthii Dominance Pant-grunt Aggression Coexistence |
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