Fecal cortisol levels predict breeding but not survival of females in the short-lived rodent, <i>Octodon degus</i>

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dc.contributor.authorEbensperger, Luis A.
dc.contributor.authorTapia, Diego
dc.contributor.authorRamirez-Estrada, Juan
dc.contributor.authorLeon, Cecilia
dc.contributor.authorSoto-Gamboa, Mauricio
dc.contributor.authorHayes, Loren D.
dc.date.accessioned2025-01-24T00:04:02Z
dc.date.available2025-01-24T00:04:02Z
dc.date.issued2013
dc.description.abstractThe cort-adaptation hypothesis indicates that an association between glucocorticoid (cort) levels and fitness may vary with the extent to which reproduction or breeding effort is a major determinant of cort levels. Support for a context dependent association between cort and fitness comes mostly from relatively long-lived, bird species. We tested the hypothesis that there are gender and context (life-history) specific cort-fitness relationships in degus, a short-lived and generally semelparous social rodent. In particular, we used demographical records on a natural population to estimate adult survival through seasons and years and linked that to records of baseline cort (based on fecal cortisol metabolites). We found no evidence for a direct relationship between baseline cort and adult survival across seasons, and this lack of association was recorded irrespective of sex and life history stage. Yet, cort levels during early lactation predicted the probability that females produce a second litter during the same breeding season, supporting a connection between baseline cort levels and breeding effort. Overall, the differential effects of cort on survival and breeding supported that the extent of cort-fitness relationships depends on the fitness component examined. (C) 2013 Published by Elsevier Inc.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.ygcen.2013.02.044
dc.identifier.eissn1095-6840
dc.identifier.issn0016-6480
dc.identifier.urihttps://doi.org/10.1016/j.ygcen.2013.02.044
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101779
dc.identifier.wosidWOS:000318751000022
dc.language.isoen
dc.pagina.final171
dc.pagina.inicio164
dc.revistaGeneral and comparative endocrinology
dc.rightsacceso restringido
dc.subjectCortisol
dc.subjectDirect fitness
dc.subjectSurvival
dc.subjectFertility
dc.subjectStress response
dc.subject.ods15 Life on Land
dc.subject.ods13 Climate Action
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa13 Acción por el clima
dc.titleFecal cortisol levels predict breeding but not survival of females in the short-lived rodent, <i>Octodon degus</i>
dc.typeartículo
dc.volumen186
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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