Sociality, glucocorticoids and direct fitness in the communally rearing rodent, Octodon degus

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dc.contributor.authorEbensperger, Luis A.
dc.contributor.authorRamirez Estrada, Juan
dc.contributor.authorLeon, Cecilia
dc.contributor.authorCastro, Rodrigo A.
dc.contributor.authorOrtiz Tolhuysen, Liliana
dc.contributor.authorSobrero, Raul
dc.contributor.authorQuirici, Veronica
dc.contributor.authorBurger, Joseph Robert
dc.contributor.authorSoto Gamboa, Mauricio
dc.contributor.authorHayes, Loren D.
dc.date.accessioned2024-01-10T12:08:38Z
dc.date.available2024-01-10T12:08:38Z
dc.date.issued2011
dc.description.abstractWhile ecological causes of sociality (or group living) have been identified, proximate mechanisms remain less clear. Recently, close connections between sociality, glucocorticoid hormones (cart) and fitness have been hypothesized. In particular, cort levels would reflect a balance between fitness benefits and costs of group living, and therefore baseline coil levels would vary with sociality in a way opposite to the covariation between sociality and fitness. However, since reproductive effort may become a major determinant of stress responses (i.e., the cart-adaptation hypothesis), cort levels might also be expected to vary with sociality in a way similar to the covariation between sociality and fitness. We tested these expectations during three years in a natural population of the communally rearing degu, Octodon degus. During each year we quantified group membership, measured fecal cortisol metabolites (a proxy of baseline cort levels under natural conditions), and estimated direct fitness. We recorded that direct fitness decreases with group size in these animals. Secondly, neither group size nor the number of females (two proxies of sociality) influenced mean (or coefficient of variation, CV) baseline cortisol levels of adult females. In contrast, cortisol increased with per capita number of offspring produced and offspring surviving to breeding age during two out of three years examined. Together, our results imply that variation in glucocorticoid hormones is more linked to reproductive challenge than to the costs of group living. Most generally, our study provided independent support to the cort-adaptation hypothesis, according to which reproductive effort is a major determinant, yet temporally variable, influence on cart-fitness covariation. (C) 2011 Elsevier Inc. All rights reserved.
dc.description.funderFONDECYT
dc.description.funderNational Science Foundation
dc.description.funderCentro de Estudios Avanzados en Ecologia and Biodiversidad
dc.description.funderAmerican Society of Mammalogists
dc.description.funderSigma Xi
dc.description.funderCommission for Scientific Research and Technology (Chilean Government)
dc.description.funderNATIONAL INSTITUTE OF BIOMEDICAL IMAGING AND BIOENGINEERING
dc.fechaingreso.objetodigital16-04-2024
dc.format.extent7 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.yhbeh.2011.07.002
dc.identifier.eissn1095-6867
dc.identifier.issn0018-506X
dc.identifier.pubmedidMEDLINE:21777588
dc.identifier.urihttps://doi.org/10.1016/j.yhbeh.2011.07.002
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76412
dc.identifier.wosidWOS:000294834100005
dc.information.autorucCiencias Biológicas;Castro R;S/I;166622
dc.information.autorucCiencias Biológicas;Ebensperger L ;S/I;73141
dc.information.autorucCiencias Biológicas;Leon C ;S/I;174801
dc.information.autorucCiencias Biológicas;Ortiz L;S/I;166623
dc.information.autorucCiencias Biológicas;Quirici V;S/I;158188
dc.information.autorucCiencias Biológicas;Ramirez J ;S/I;190554
dc.information.autorucCiencias Biológicas;Sobrero R ;S/I;182512
dc.issue.numero4
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final352
dc.pagina.inicio346
dc.publisherACADEMIC PRESS INC ELSEVIER SCIENCE
dc.revistaHORMONES AND BEHAVIOR
dc.rightsacceso restringido
dc.subjectCortisol
dc.subjectDirect fitness
dc.subjectSociality
dc.subjectSocial behavior
dc.subjectStressor
dc.subjectFECAL GLUCOCORTICOIDS
dc.subjectRHOMBOMYS-OPIMUS
dc.subjectSEASONAL-CHANGES
dc.subjectSTRESS-RESPONSE
dc.subjectDIURNAL RODENT
dc.subjectHORMONE-LEVELS
dc.subjectRANGE AREAS
dc.subjectGROUP-SIZE
dc.subjectBASE-LINE
dc.subjectSURVIVAL
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.titleSociality, glucocorticoids and direct fitness in the communally rearing rodent, Octodon degus
dc.typeartículo
dc.volumen60
sipa.codpersvinculados166622
sipa.codpersvinculados73141
sipa.codpersvinculados174801
sipa.codpersvinculados166623
sipa.codpersvinculados158188
sipa.codpersvinculados190554
sipa.codpersvinculados182512
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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