Show simple item record

dc.contributor.author Silva, Laura Alejandra
dc.contributor.author Saporiti, María Fabiana Sonia
dc.contributor.author Vales, Damián Gustavo
dc.contributor.author Tavares, Mauricio
dc.contributor.author Gandini, Patricia Alejandra
dc.contributor.author Crespo, Enrique Alberto
dc.contributor.author Cardona, Luis
dc.date.available 2018-01-12T19:04:55Z
dc.date.issued 2014-03
dc.identifier.citation Tavares, Mauricio; Cardona, Luis; Silva, Laura Alejandra; Crespo, Enrique Alberto; Gandini, Patricia Alejandra; Saporiti, María Fabiana Sonia; et al.; Differences in diet composition and foraging patterns between sexes of the Magellanic penguin (Spheniscus magellanicus) during the non-breeding period as revealed by δ13C and δ15N values in feathers and bone; Springer; Marine Biology; 161; 5; 3-2014; 1195-1206
dc.identifier.issn 0025-3162
dc.identifier.uri http://hdl.handle.net/11336/33108
dc.description.abstract In diving seabirds, sexual dimorphism in size often results in sex-related differences of foraging patterns. Previous research on Magellanic penguins, conducted during the breeding season, failed to reveal consistent differences between the sexes on foraging behavior, despite sexual dimorphism. In this paper, we tested the hypothesis that male and female Magellanic penguins differ in diet and foraging patterns during the non-breeding period when the constraints imposed by chick rearing activities vanish. We used stable isotope ratios of carbon and nitrogen in feather and bone to characterize the diet and foraging patterns of male and female penguins in the South Atlantic at the beginning of the 2009-2010 and 2010-2011 post-breeding seasons (feathers) and over several consecutive breeding and migratory seasons (bone). The mean δ13C and δ15N values of feathers showed no differences between the sexes in any of the three regions considered or in the diet composition between the sexes from identical breeding regions; however, Bayesian ellipses showed a higher isotopic niche width in males at the beginning of the post-breeding season. Stable isotope ratios in bone revealed the enrichment of males with δ13C compared with females across the three regions considered. Furthermore, the Bayesian ellipses were larger for males and encompassed those of females in two of the three regions analyzed. These results suggest a differential use of winter resources between the sexes, with males typically showing a larger diversity of foraging/migratory strategies. The results also show that dietary differences between male and female Magellanic penguins may occur once the constraints imposed by chick rearing activities cease at the beginning of the post-breeding season. 
dc.format application/pdf
dc.language.iso eng
dc.publisher Springer
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject MAGELLANIC PENGUIN
dc.subject SPHENISCUS MAGELLANICUS
dc.subject DIET
dc.subject STABLE ISOTOPES ANALYSIS
dc.subject.classification Otras Ciencias Biológicas
dc.subject.classification Ciencias Biológicas
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Differences in diet composition and foraging patterns between sexes of the Magellanic penguin (Spheniscus magellanicus) during the non-breeding period as revealed by δ13C and δ15N values in feathers and bone
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2018-01-11T13:53:00Z
dc.identifier.eissn 1432-1793
dc.journal.volume 161
dc.journal.number 5
dc.journal.pagination 1195-1206
dc.journal.pais Alemania
dc.journal.ciudad Berlín
dc.description.fil Fil: Silva, Laura Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
dc.description.fil Fil: Saporiti, María Fabiana Sonia. Universidad de Barcelona. Facultad de Biología. Departamento de Biología Animal; España
dc.description.fil Fil: Vales, Damián Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
dc.description.fil Fil: Tavares, Mauricio. Universidade Federal do Rio Grande do Sul; Brasil
dc.description.fil Fil: Gandini, Patricia Alejandra. Wildlife Conservation Society; Estados Unidos. Universidad Nacional de la Patagonia Austral. Unidad Académica Caleta Olivia. Centro de Investigaciones Puerto Deseado; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
dc.description.fil Fil: Cardona, Luis. Universidad de Barcelona. Facultad de Biología. Departamento de Biología Animal; España
dc.journal.title Marine Biology
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007%2Fs00227-014-2410-1
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s00227-014-2410-1
dc.conicet.fuente unificacion


Archivos asociados

Icon
Blocked Acceso no disponible

This item appears in the following Collection(s)

Show simple item record

info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)