Activational and organizational effects of testosterone on the number of mating partners and reproductive success in males of a social rodent

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dc.contributor.authorCorrea, Loreto A.
dc.contributor.authorAspillaga-Cid, Antonia
dc.contributor.authorRiquelme, Juan
dc.contributor.authorLy-Prieto, Lvaro
dc.contributor.authorHayes, Loren D.
dc.contributor.authorEbensperger, Luis A.
dc.date.accessioned2025-01-20T16:10:53Z
dc.date.available2025-01-20T16:10:53Z
dc.date.issued2024
dc.description.abstractThe timing of exposure to the steroid hormone, testosterone, produces activational and organizational effects in vertebrates. These activational and organizational effects are hypothesized to relate with the number of female mating partners and reproductive success in males. We tested this hypothesis by examining 151 wild degu ( Octodon degus) ) males across a 10-year study. We quantified the association between adult serum testosterone levels (i.e., an indirect index of adult activational effects) and anogenital distance (AGD) length (i.e., a direct index of fetal organizational effects), and their interaction on the number of female mating partners and reproductive success. We found no evidence of an association between adult male serum testosterone levels and the number of female mating partners, or between adult male serum testosterone levels and reproductive success. However, male AGD was positively associated with reproductive success, but not so with the number of female mating partners. Additionally, the positive association between male AGD and male reproductive success was mediated by the number of mates. Our findings do not support major roles of activational or organizational effects of testosterone on the number of female mating partners and its consequences on male reproductive success. Instead, our results suggest that compared with individual male attributes, the female social environment plays a more important role in driving male reproductive success.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.yhbeh.2024.105613
dc.identifier.eissn1095-6867
dc.identifier.issn0018-506X
dc.identifier.urihttps://doi.org/10.1016/j.yhbeh.2024.105613
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90236
dc.identifier.wosidWOS:001292175200001
dc.language.isoen
dc.revistaHormones and behavior
dc.rightsacceso restringido
dc.subjectAnogenital distance
dc.subjectSerum testosterone
dc.subjectNumber of mating partners
dc.subjectNumber of females
dc.subjectReproductive success
dc.subjectCommon degu
dc.subject.ods13 Climate Action
dc.subject.ods15 Life on Land
dc.subject.odspa13 Acción por el clima
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleActivational and organizational effects of testosterone on the number of mating partners and reproductive success in males of a social rodent
dc.typeartículo
dc.volumen165
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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