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Divorce in the socially monogamous zebra finch: Hormonal mechanisms and reproductive consequences.
Crino, Ondi L; Buchanan, Katherine L; Fanson, Benjamin G; Hurley, Laura L; Smiley, Kristina O; Griffith, Simon C.
Afiliación
  • Crino OL; Centre for Integrative Ecology, Deakin University, School of Life and Environmental Sciences, Geelong, Victoria, Australia; Department of Biological Sciences, Macquarie University, Sydney, New South Wales, Australia. Electronic address: ondi.crino@deakin.edu.au.
  • Buchanan KL; Centre for Integrative Ecology, Deakin University, School of Life and Environmental Sciences, Geelong, Victoria, Australia.
  • Fanson BG; Centre for Integrative Ecology, Deakin University, School of Life and Environmental Sciences, Geelong, Victoria, Australia.
  • Hurley LL; Department of Biological Sciences, Macquarie University, Sydney, New South Wales, Australia.
  • Smiley KO; Department of Psychology, Cornell University, Ithaca, NY, USA.
  • Griffith SC; Department of Biological Sciences, Macquarie University, Sydney, New South Wales, Australia.
Horm Behav ; 87: 155-163, 2017 01.
Article en En | MEDLINE | ID: mdl-27838360
Up to 80% of all bird species are socially monogamous. Divorce (switching partners) or pair disruption (due to the death of a partner) has been associated with decreased reproductive success, suggesting social monogamy is a strategy that may maximize fitness via coordination between partners. Previous studies have demonstrated the effects of divorce and pair disruption on immediate reproductive success. Here, we used a paired experimental design in the zebra finch (Taeniopygia guttata) to examine the hormonal mechanisms that modulate parental behavior and reproductive success in response to a partnership change (hereafter divorce). Specifically, we examined the effects of divorce on the avian stress hormone corticosterone (CORT) in both parents and nestlings, parental behaviors (incubation and nestling provisioning), prolactin (PRL), and reproductive success. We found that divorce resulted in delayed clutch initiation, reduced clutch mass, and an increase in nestling CORT response to a standardized stressor. These effects on reproductive investment and chick CORT response were not clearly determined by parental endocrine responses. Divorce had no effect on the level of parental CORT. PRL levels were highly correlated within a pair regardless of treatment, were negatively related to the investment that males made in incubation, and increased in experimental males as a result of pair disruption. This study demonstrates the fundamental impact which divorce has not only on reproduction, but also the physiological stress responses of offspring and suggests that in socially monogamous animals the maintenance of a stable partnership over time could be advantageous for long term fitness.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Apareamiento / Reproducción / Conducta Sexual Animal / Estrés Fisiológico / Pinzones Límite: Animals Idioma: En Revista: Horm Behav Año: 2017 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Apareamiento / Reproducción / Conducta Sexual Animal / Estrés Fisiológico / Pinzones Límite: Animals Idioma: En Revista: Horm Behav Año: 2017 Tipo del documento: Article Pais de publicación: Estados Unidos