dc.contributor.author | Gesquiere, LR | |
dc.contributor.author | Learn, NH | |
dc.contributor.author | Simao, MCM | |
dc.contributor.author | Onyango, PO | |
dc.contributor.author | Alberts, SC. | |
dc.contributor.author | Altmann, J | |
dc.date.accessioned | 2013-06-25T14:37:22Z | |
dc.date.available | 2013-06-25T14:37:22Z | |
dc.date.issued | 2011 | |
dc.identifier.citation | Science Magazine 15 July 2011: Vol. 333 no. 6040 pp. 357-360 | en |
dc.identifier.uri | http://www.sciencemag.org/content/333/6040/357.short | |
dc.identifier.uri | http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/39883 | |
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 |
dc.language.iso | en | en |
dc.publisher | Univesity of Nairobi | en |
dc.title | Life at the top: rank and stress in wild male baboons | en |
dc.type | Article | en |
local.publisher | Department of Veterinary Anatomy and Physiology | en |