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Life at the top: rank and stress in wild male baboons

Show simple item record Laurence R Gesquiere, Niki H Learn, M Carolina M Simao, Patrick O Onyango, Susan C Alberts, Jeanne Altmann 2020-07-24T08:12:40Z 2020-07-24T08:12:40Z 2011-07-15
dc.description Please refer to the complete version of record at en_US
dc.description.abstract In social hierarchies, dominant individuals experience reproductive and health benefits, but the costs of social dominance remain a topic of debate. Prevailing hypotheses predict that higher-ranking males experience higher testosterone and glucocorticoid (stress hormone) levels than lower-ranking males when hierarchies are unstable but not otherwise. In this long-term study of rank-related stress in a natural population of savannah baboons (Papio cynocephalus), high-ranking males had higher testosterone and lower glucocorticoid levels than other males, regardless of hierarchy stability. The singular exception was for the highest-ranking (alpha) males, who exhibited both high testosterone and high glucocorticoid levels. In particular, alpha males exhibited much higher stress hormone levels than second-ranking (beta) males, suggesting that being at the very top may be more costly than previously thought. en_US
dc.publisher American Association for the Advancement of Science en_US
dc.title Life at the top: rank and stress in wild male baboons en_US
dc.type Article en_US

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