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dc.contributor.author
Graña Grilli, Maricel

dc.contributor.author
Libertelli, Marcela
dc.contributor.author
Montalti, Diego

dc.date.available
2019-08-15T21:41:06Z
dc.date.issued
2011-12
dc.identifier.citation
Graña Grilli, Maricel; Libertelli, Marcela; Montalti, Diego; Diet of South Polar Skua chicks in two areas of sympatry with Brown Skua; Waterbird Society; Waterbirds; 34; 4; 12-2011; 495-498
dc.identifier.issn
1524-4695
dc.identifier.uri
http://hdl.handle.net/11336/81695
dc.description.abstract
The food provided to South Polar Skuas (Stercorarius maccormicki) chicks was determined at two Antarctic sites where South Polar Skuas breed sympatrically with Brown Skuas (S. antarcticus). At Harmony Point on Nelson Island, 16 samples of regurgitated stomach contents were analyzed, all contained remains of penguin chicks (mostly soft tissues), which constituted the bulk of the contents, while only two samples had fish or krill remains. These South Polar Skuas had access to penguin colonies, where they hunted chicks or fed on fresh carcasses. However, at Half Moon Island, only two out of nine samples contained minor amounts of penguin remains while fish were the major dietary resource. The high fish content in their diet may indicate a preference for marine rather than terrestrial resources or be the result of competition with Brown Skuas. The variability in food items evidenced by the differences in regurgitated stomach contents indicates that South Polar Skuas may have a trophic plasticity that allows them to change their feeding habits from one resource to another one according to availability. Such may make them less vulnerable to a reduction in the availability of a particular food item.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Waterbird Society

dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Antarctica
dc.subject
Chick Diet
dc.subject
Stercorarius Antarcticus
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Stercorarius Maccormicki
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Stomach Contents
dc.subject.classification
Zoología, Ornitología, Entomología, Etología

dc.subject.classification
Ciencias Biológicas

dc.subject.classification
CIENCIAS NATURALES Y EXACTAS

dc.title
Diet of South Polar Skua chicks in two areas of sympatry with Brown Skua
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-07-17T17:47:23Z
dc.journal.volume
34
dc.journal.number
4
dc.journal.pagination
495-498
dc.journal.pais
Estados Unidos

dc.journal.ciudad
Waco
dc.description.fil
Fil: Graña Grilli, Maricel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina
dc.description.fil
Fil: Libertelli, Marcela. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina
dc.description.fil
Fil: Montalti, Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados. Sección Ornitología; Argentina
dc.journal.title
Waterbirds

dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1675/063.034.0412
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://bioone.org/journals/waterbirds/volume-34/issue-4/063.034.0412/Diet-of-South-Polar-Skua-Chicks-in-Two-Areas-of/10.1675/063.034.0412.short
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