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dc.contributor.authorHuck, Maren
dc.contributor.authorLöttker, Petra
dc.contributor.authorHeymann, Eckhard W.
dc.contributor.authorHeistermann, Michael
dc.date.accessioned2016-02-15T14:14:45Zen
dc.date.available2016-02-15T14:14:45Zen
dc.date.issued2005en
dc.identifier.citationCharacterization and social correlates of fecal testosterone and cortisol excretion in wild male Saguinus mystax 2005, 26 (1):159 International Journal of Primatologyen
dc.identifier.issn0164-0291en
dc.identifier.issn1573-8604en
dc.identifier.doi10.1007/s10764-005-0728-8en
dc.identifier.urihttp://hdl.handle.net/10545/596281en
dc.description.abstractReproductive success in male primates can be influenced by testosterone (T) and cortisol (C). We examined them in wild Saguinus mystax via fecal hormone analysis. Firstly, we wanted to characterize male hormonal status over the course of the year. Further we tested the influence of the reproductive status of the breeding female, social instability, and intergroup encounter rates on T levels, comparing the results with predictions of the challenge hypothesis (Wingfield et al., 1990). We also tested for interindividual differences in hormonal levels, possibly related to social or breeding status. We collected data during a 12-mo study on 2 groups of moustached tamarins at the Estación Biológica Quebrada Blanco in northeastern Peru. We found fairly similar T and C levels over the course of the year for all males. Yet an elevation of T shortly after the birth of infants, during the phase of ovarian inactivity of the group’s breeding female, was evident. Hormonal levels were not significantly elevated during a phase of social instability, did not correlate with intergroup encounter rates, and did not differ between breeding and nonbreeding males. Our results confirm the challenge hypothesis (Wingfield et al., 1990). The data suggest that reproductive competition inmoustached tamarins is not based on endocrinological, but instead on behavioral mechanisms, possibly combined with sperm competition.
dc.description.sponsorshipDeutsche Forschungsgemeinschaft (HE 1870/10-1,2)en
dc.language.isoenen
dc.relation.urlhttp://link.springer.com/10.1007/s10764-005-0728-8en
dc.rightsArchived with thanks to International Journal of Primatologyen
dc.subjectSaguinus mystaxen
dc.subjectFecal steroidsen
dc.subjectTestosteroneen
dc.subjectCortisolen
dc.subjectChallenge hypothesisen
dc.titleCharacterization and social correlates of fecal testosterone and cortisol excretion in wild male Saguinus mystaxen
dc.typeArticleen
dc.contributor.departmentAbteilung Soziobiologie, Deutsches Primatenzentrum, Göttingen, Germanyen
dc.contributor.departmentLehrstuhl für Verhaltensforschung, Universität Bielefeld, Germanyen
dc.contributor.departmentInstitut für Neuro- & Verhaltensbiologie, Abt. Verhaltensbiologie, Westfälische Wilhelms-Universität Münster, Germanyen
dc.contributor.departmentAbteilung für Reproduktionsbiology, Deutsches Primatenzentrum, Göttingen, Germanyen
dc.identifier.journalInternational Journal of Primatologyen
refterms.dateFOA2019-02-28T14:11:27Z
html.description.abstractReproductive success in male primates can be influenced by testosterone (T) and cortisol (C). We examined them in wild Saguinus mystax via fecal hormone analysis. Firstly, we wanted to characterize male hormonal status over the course of the year. Further we tested the influence of the reproductive status of the breeding female, social instability, and intergroup encounter rates on T levels, comparing the results with predictions of the challenge hypothesis (Wingfield et al., 1990). We also tested for interindividual differences in hormonal levels, possibly related to social or breeding status. We collected data during a 12-mo study on 2 groups of moustached tamarins at the Estación Biológica Quebrada Blanco in northeastern Peru. We found fairly similar T and C levels over the course of the year for all males. Yet an elevation of T shortly after the birth of infants, during the phase of ovarian inactivity of the group’s breeding female, was evident. Hormonal levels were not significantly elevated during a phase of social instability, did not correlate with intergroup encounter rates, and did not differ between breeding and nonbreeding males. Our results confirm the challenge hypothesis (Wingfield et al., 1990). The data suggest that reproductive competition inmoustached tamarins is not based on endocrinological, but instead on behavioral mechanisms, possibly combined with sperm competition.


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