Dominance, aggression and testosterone in wild chimpanzees: a test of the 'challenge hypothesis'
Article Abstract:
Behavioural observations and noninvasive hormone sampling of 11 male chimpanzees, was conducted, to test predictions of the challenge hypothesis that variation in male testosterone levels is more closely associated with aggression in reproductive contexts than it is with changes in reproductive physiology. It was founded that high-ranking chimpanzees were more aggressive than low-ranking males and produced higher levels of urinary testosterone.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 2004
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Genetic correlates of social behaviour in wild chimpanzees: evidence from mitrochondrial DNA
Article Abstract:
A study designed to test the hypothesis that chimpanzees living in a natural setting preferentially select alliances with related animals is presented. The social behaviour of chimpanzees living in Uganda's Kibale Forest and in other forest locations is examined using DNA sequence data. Results show that kin selection is not a strong force in the intra-community affiliation of chimpanzees.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1997
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Dominance, fatness and fitness in female American bison, Bison bison
Article Abstract:
Indicators of fitness were examined in relation to dominance rank in a group of adult female American bison in semifree-ranging conditions. The findings suggest that dominance rank correlated significantly with three indicators of body condition, weight, speed of hair loss, and fatness.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 2005
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