Cooperation and competition: nepotistic tolerance and intrasexual aggression in western bluebird winter groups
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The number of subordinates moderates intrasexual competition among males in cooperatively breeding meerkats.
For dominant individuals in cooperatively breeding species, the presence of subordinates is associated with both benefits (i.e. increased reproductive output and other group-living benefits) and costs (i.e. intrasexual competition on reproduction). The biological market theory predicts that dominant individuals are tolerant to same-sex group members when there are only a few subordinates, so as...
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