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dc.contributor.author
Silva, Laura Alejandra
dc.contributor.author
Saporiti, María Fabiana Sonia
dc.contributor.author
Vales, Damián Gustavo
dc.contributor.author
Tavares, Mauricio
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Gandini, Patricia Alejandra
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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
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Diet
dc.subject
Stable Isotopes Analysis
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Otras Ciencias Biológicas
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Ciencias Biológicas
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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
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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


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