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tranthuongbn



Posts : 316
Join date : 2011-03-04

PostSubject: Dominance hierarchy   Fri Jul 15, 2011 2:45 am

A dominance hierarchy (in humans: social hierarchy) is the organization of individuals in a group that occurs when competition for resources leads to aggression. Schjelderup-Ebbe, who studied the often-cited example of the pecking order in chickens, found that such social structures lead to more stable flocks with reduced aggression among individuals.
Dominance hierarchies can be despotic or linear. In a despotic hierarchy, only one individual is dominant, while the others are all equally submissive. In a linear hierarchy, for example, in the above cited pecking order of chickens, each individual dominates all individuals below him and not those above him.
Dominance hierarchies occur in most social animal species that normally live in groups, including primates. Dominance hierarchies have been extensively studied in fish, birds, and mammals. Dominance hierarchies can be simple

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