Uniformity of diet composition of Brown Skua chicks at different ages and between siblings

Autores
Graña Grilli, Maricel; Marti, Lucas J.; Montalti, Diego
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Facultad de Ciencias Naturales y Museo
Consejo Nacional de Investigaciones Científicas y Técnicas
Materia
Ciencias Naturales
Chick growth
Sibling competition
Stercorarius antarcticus lonnbergi
Stomach regurgitate
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/96921
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/96921
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Uniformity of diet composition of Brown Skua chicks at different ages and between siblingsGraña Grilli, MaricelMarti, Lucas J.Montalti, DiegoCiencias NaturalesChick growthSibling competitionStercorarius antarcticus lonnbergiStomach regurgitateThe 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.Facultad de Ciencias Naturales y MuseoConsejo Nacional de Investigaciones Científicas y Técnicas2014-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf265-269http://sedici.unlp.edu.ar/handle/10915/96921enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/32969info:eu-repo/semantics/altIdentifier/url/http://www4.museu-goeldi.br/revistabrornito/revista/index.php/BJO/article/view/22_3_artigo4info:eu-repo/semantics/altIdentifier/issn/0103-5657info:eu-repo/semantics/altIdentifier/hdl/11336/32969info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T10:52:16Zoai:sedici.unlp.edu.ar:10915/96921Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 10:52:17.13SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Uniformity of diet composition of Brown Skua chicks at different ages and between siblings
title Uniformity of diet composition of Brown Skua chicks at different ages and between siblings
spellingShingle Uniformity of diet composition of Brown Skua chicks at different ages and between siblings
Graña Grilli, Maricel
Ciencias Naturales
Chick growth
Sibling competition
Stercorarius antarcticus lonnbergi
Stomach regurgitate
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
dc.creator.none.fl_str_mv Graña Grilli, Maricel
Marti, Lucas J.
Montalti, Diego
author Graña Grilli, Maricel
author_facet Graña Grilli, Maricel
Marti, Lucas J.
Montalti, Diego
author_role author
author2 Marti, Lucas J.
Montalti, Diego
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Naturales
Chick growth
Sibling competition
Stercorarius antarcticus lonnbergi
Stomach regurgitate
topic Ciencias Naturales
Chick growth
Sibling competition
Stercorarius antarcticus lonnbergi
Stomach regurgitate
dc.description.none.fl_txt_mv 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.
Facultad de Ciencias Naturales y Museo
Consejo Nacional de Investigaciones Científicas y Técnicas
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.
publishDate 2014
dc.date.none.fl_str_mv 2014-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/96921
url http://sedici.unlp.edu.ar/handle/10915/96921
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/32969
info:eu-repo/semantics/altIdentifier/url/http://www4.museu-goeldi.br/revistabrornito/revista/index.php/BJO/article/view/22_3_artigo4
info:eu-repo/semantics/altIdentifier/issn/0103-5657
info:eu-repo/semantics/altIdentifier/hdl/11336/32969
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
265-269
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.13397

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