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Attempts to measure dominance relationships using cardinal, rather than ordinal ranks have a long history. Nevertheless, it is still unclear if cardinal dominance ranks have an impact on the life of animals. In particular, no information is available on how individual group living animals represent their own dominance hierarchy. This can be investigated testing whether cardinal rank differences affect...
Grooming is the most common primate affiliative behaviour, and primates compete for accessing grooming partners. We studied a captive group of mandrills (Mandrillus sphinx) to evaluate the role of different types of competitive interactions in shaping the distribution of grooming among females. Mandrill females preferentially groomed high‐ranking individuals, but low‐ranking females were less able...
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