Uniformity of diet composition of Brown Skua chicks at different ages and between siblings
The diet of chicks may change according to their growth and also vary between siblings due to their competitive relationship. Diet composition of 81 Brown Skua (Stercorarius antarcticus lonnbergi) chicks was analysed from regurgitated stomach contents in order to determine changes in diet compositio...
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ftconicet:oai:ri.conicet.gov.ar:11336/32969 2023-10-09T21:46:28+02:00 Uniformity of diet composition of Brown Skua chicks at different ages and between siblings Graña Grilli, Maricel Marti, Lucas J. Montalti, Diego application/pdf http://hdl.handle.net/11336/32969 eng eng Sociedade Brasileira de Ornitologia info:eu-repo/semantics/altIdentifier/url/http://www4.museu-goeldi.br/revistabrornito/revista/index.php/BJO/article/view/22_3_artigo4 http://hdl.handle.net/11336/32969 Montalti, Diego; Marti, Lucas J.; Graña Grilli, Maricel; Uniformity of diet composition of Brown Skua chicks at different ages and between siblings; Sociedade Brasileira de Ornitologia; Ararajuba; 22; 3; 10-2014; 265-269 0103-5657 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Chick growth sibling competition Stercorarius antarcticus lonnbergi stomach regurgitate https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet 2023-09-24T20:04:04Z The diet of chicks may change according to their growth and also vary between siblings due to their competitive relationship. Diet composition of 81 Brown Skua (Stercorarius antarcticus lonnbergi) chicks was analysed from regurgitated stomach contents in order to determine changes in diet composition related to chick age and differences between siblings. Fifty-nine of the samples belonged to chicks whose age was estimated by applying culmen measurement to a regression function. The remaining 22 samples belonged to 11 sibling pairs whose stomach contents were simultaneously sampled. The diet was constituted mostly by soft tissues of penguins. Marine resources were a minor part of the diet of chicks, appearing in the third week of their life. The qualitative composition of the stomach content of siblings was similar in most cases, but mass of regurgitates differed between siblings (1.3– 90.0% = 0.5–9 g), which suggests the potential existence of aggressive food monopolization by one sibling, an issue to be elucidated with further research. Fil: Graña Grilli, Maricel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina Fil: Marti, Lucas J. Universidad CAECE. Ciudad Buenos Aires; Argentina Fil: Montalti, Diego. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico Zoología Vertebrados; Argentina Article in Journal/Newspaper Antarc* antarcticus Brown Skua Dirección Nacional del Antártico Instituto Antártico Argentino Stercorarius antarcticus CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentino Argentina |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Chick growth sibling competition Stercorarius antarcticus lonnbergi stomach regurgitate https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
Chick growth sibling competition Stercorarius antarcticus lonnbergi stomach regurgitate https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Graña Grilli, Maricel Marti, Lucas J. Montalti, Diego Uniformity of diet composition of Brown Skua chicks at different ages and between siblings |
topic_facet |
Chick growth sibling competition Stercorarius antarcticus lonnbergi stomach regurgitate https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
The diet of chicks may change according to their growth and also vary between siblings due to their competitive relationship. Diet composition of 81 Brown Skua (Stercorarius antarcticus lonnbergi) chicks was analysed from regurgitated stomach contents in order to determine changes in diet composition related to chick age and differences between siblings. Fifty-nine of the samples belonged to chicks whose age was estimated by applying culmen measurement to a regression function. The remaining 22 samples belonged to 11 sibling pairs whose stomach contents were simultaneously sampled. The diet was constituted mostly by soft tissues of penguins. Marine resources were a minor part of the diet of chicks, appearing in the third week of their life. The qualitative composition of the stomach content of siblings was similar in most cases, but mass of regurgitates differed between siblings (1.3– 90.0% = 0.5–9 g), which suggests the potential existence of aggressive food monopolization by one sibling, an issue to be elucidated with further research. Fil: Graña Grilli, Maricel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina Fil: Marti, Lucas J. Universidad CAECE. Ciudad Buenos Aires; Argentina Fil: Montalti, Diego. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico Zoología Vertebrados; Argentina |
format |
Article in Journal/Newspaper |
author |
Graña Grilli, Maricel Marti, Lucas J. Montalti, Diego |
author_facet |
Graña Grilli, Maricel Marti, Lucas J. Montalti, Diego |
author_sort |
Graña Grilli, Maricel |
title |
Uniformity of diet composition of Brown Skua chicks at different ages and between siblings |
title_short |
Uniformity of diet composition of Brown Skua chicks at different ages and between siblings |
title_full |
Uniformity of diet composition of Brown Skua chicks at different ages and between siblings |
title_fullStr |
Uniformity of diet composition of Brown Skua chicks at different ages and between siblings |
title_full_unstemmed |
Uniformity of diet composition of Brown Skua chicks at different ages and between siblings |
title_sort |
uniformity of diet composition of brown skua chicks at different ages and between siblings |
publisher |
Sociedade Brasileira de Ornitologia |
url |
http://hdl.handle.net/11336/32969 |
geographic |
Argentino Argentina |
geographic_facet |
Argentino Argentina |
genre |
Antarc* antarcticus Brown Skua Dirección Nacional del Antártico Instituto Antártico Argentino Stercorarius antarcticus |
genre_facet |
Antarc* antarcticus Brown Skua Dirección Nacional del Antártico Instituto Antártico Argentino Stercorarius antarcticus |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://www4.museu-goeldi.br/revistabrornito/revista/index.php/BJO/article/view/22_3_artigo4 http://hdl.handle.net/11336/32969 Montalti, Diego; Marti, Lucas J.; Graña Grilli, Maricel; Uniformity of diet composition of Brown Skua chicks at different ages and between siblings; Sociedade Brasileira de Ornitologia; Ararajuba; 22; 3; 10-2014; 265-269 0103-5657 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
_version_ |
1779322174750851072 |