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动物学研究 2013
Socialrankandcortisolamongfemalerhesusmacaques(Macacamulatta)DOI: 10.3724/SP.J.1141.2013.E02E42 Keywords: Socialrank,Hypothalamus-pituitary-adrenalaxis,Cortisol,Female,Rhesusmacaques Abstract: Inanimalsocieties,somestressfuleventscanleadtohigherlevelsofphysiologicalstress.Suchstressors,likesocialrank,alsopredictanincreasedvulnerabilitytoanarrayofdiseases.However,thephysiologicalrelationshipbetweensocialrankandstressvariesbetweendifferentspecies,aswellaswithingroupsofasinglespecies.Forexample,dominantindividualsaremoresociallystressedattimes,whileatothertimesitisthesubordinateoneswhoexperiencethisstress.Together,thesevariationsmakeitdifficulttoassessdiseasevulnerabilityasconnectedtosocialinteractions.Inordertolearnmoreabouthowphysiologicalrankrelationshipsvarybetweengroupsofasinglespecies,cortisolmeasurementsfromhairsampleswereusedtoevaluatetheeffectsofdominancerankonlong-termstresslevelsindespoticandlessstringentfemalerhesusmacaquehierarchalgroups.Indespoticgroups,cortisollevelswerefoundnottobecorrelatedwithsocialrank,butanegativecorrelationwasfoundbetweensocialrankandcortisollevelsinlessstringenthierarchies.Lowrankingmonkeysinlessstringentgroupssecretedelevatedlevelsofcortisolcomparedtohigherrankinganimals.Thesedatasuggestthatvariationsinthestrictnessofthedominancehierarchyaredeterminingfactorsinrankrelatedstressphysiology.Thefurtherconsiderationofnonhumanprimatesocialsystemdiversityandthelineardegreeoftheirhierarchiesmayallowforthedevelopmentofvalidrank-relatedstressmodelsthatwillhelpincreaseourunderstandingandguidethedevelopmentofnewtherapeuticsfordiseasesrelatedtohumansocioeconomicstatus.
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