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Strong and Consistent Social Bonds Enhance the Longevity of Female Baboons
Longevity is a major component of variation in fitness in long-lived iteroparous species [1-4]. Among female baboons, variation in breeding lifespan accounts for approximately 50% of the variation inExpand
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The benefits of social capital: close social bonds among female baboons enhance offspring survival
Sociality has evolved in many animal taxa, but primates are unusual because they establish highly differentiated bonds with other group members. Such bonds are particularly pronounced among femalesExpand
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Female chacma baboons form strong, equitable, and enduring social bonds
Analyses of the pattern of associations, social interactions, coalitions, and aggression among chacma baboons (Papio hamadryas ursinus) in the Okavango Delta of Botswana over a 16-year periodExpand
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Behavioural and hormonal responses to predation in female chacma baboons (Papio hamadryas ursinus)
In humans, bereavement is associated with an increase in glucocorticoid (GC) levels, though this increase can be mitigated by social support. We examined faecal GC levels and grooming behaviour ofExpand
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Correlates of stress in free-ranging male chacma baboons, Papio hamadryas ursinus
In male baboons, social instability is known to increase concentrations of glucocorticoids (GCs), a class of steroid hormones associated with the vertebrate stress response. The stress response mayExpand
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A simple method for measuring colour in wild animals: Validation and use on chest patch colour in geladas (Theropithecus gelada)
Adaptive hypotheses about colour variation are widespread in behavioural ecology, and several methods of objective colour assessment have been proposed and validated for use in a wide variety ofExpand
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Factors Affecting Reproduction and Mortality Among Baboons in the Okavango Delta, Botswana
We present results of a 10-year study of free-ranging gray-footed chacma baboons (Papio ursinus griseipes) in the Okavango Delta of Botswana. The majority of deaths among adult females and juvenilesExpand
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Defining Higher Levels in the Multilevel Societies of Geladas (Theropithecus gelada)
Multilevel societies, identified by two or more nested levels (or modules) of organization, have been touted as some of the most complex social systems. However, few empirical studies haveExpand
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Factors affecting individual participation in group-level aggression among non-human primates
Summary Group members do not always act cohesively when facing extra-group rivals. When benefits such as group-defence are not monopolizable, it poses an economics problem: who should contribute toExpand
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Female hierarchy instability, male immigration and infanticide increase glucocorticoid levels in female chacma baboons
Female baboons (Papio hamadryas spp.) must contend with myriad potential stressors on a daily basis. In a previous study on female chacma baboons, Papio hamadryas ursinus, living in the OkavangoExpand
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