Reduction of skull size in South American sea lions reveals density-dependent growth during population recovery

Autores
Drago, M.; Cardona, L.; Crespo, Enrique Alberto; Grandi, Maria Florencia; Aguilar, A.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Craniometrical data of male and female skulls collected from 1974 to 2007 were used to test the hypothesis that the somatic growth of South American sea lions Otaria flavescens in northern Patagonia has been affected by a reduction in the per capita food availability, due to a combination of the population recovery after cessation of sealing and the development of industrial fishing targeting Argentine hake Merluccius hubbsi. Most of the 19 craniometric variables considered decreased through time in both sexes, and the same trend was found for a variable extracted by means of principal component analysis that was related to skull volume. Most of the reductions in skull size and volume have happened since 1990, when the sea lion population peaked and the hake population collapsed. This evidence, combined with a review of supplementary data derived from stable isotope analysis, supports the hypotheses that the somatic growth of South American sea lions is densitydependent and that industrial fishing has reduced the carrying capacity of the ecosystem for South American sea lions.
Fil: Drago, M.. Universidad de Barcelona; España
Fil: Cardona, L.. Universidad de Barcelona; España
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Grandi, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Aguilar, A.. Universidad de Barcelona; España
Materia
ARGENTINE HAKE
CRANIOMETRY
DENSITY-DEPENDENT GROWTH
OTARIA FLAVESCENS
OVERFISHING
SKULL SIZE
SOMATIC GROWTH
SOUTH AMERICAN SEA LION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/94196
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Reduction of skull size in South American sea lions reveals density-dependent growth during population recoveryDrago, M.Cardona, L.Crespo, Enrique AlbertoGrandi, Maria FlorenciaAguilar, A.ARGENTINE HAKECRANIOMETRYDENSITY-DEPENDENT GROWTHOTARIA FLAVESCENSOVERFISHINGSKULL SIZESOMATIC GROWTHSOUTH AMERICAN SEA LIONhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Craniometrical data of male and female skulls collected from 1974 to 2007 were used to test the hypothesis that the somatic growth of South American sea lions Otaria flavescens in northern Patagonia has been affected by a reduction in the per capita food availability, due to a combination of the population recovery after cessation of sealing and the development of industrial fishing targeting Argentine hake Merluccius hubbsi. Most of the 19 craniometric variables considered decreased through time in both sexes, and the same trend was found for a variable extracted by means of principal component analysis that was related to skull volume. Most of the reductions in skull size and volume have happened since 1990, when the sea lion population peaked and the hake population collapsed. This evidence, combined with a review of supplementary data derived from stable isotope analysis, supports the hypotheses that the somatic growth of South American sea lions is densitydependent and that industrial fishing has reduced the carrying capacity of the ecosystem for South American sea lions.Fil: Drago, M.. Universidad de Barcelona; EspañaFil: Cardona, L.. Universidad de Barcelona; EspañaFil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Grandi, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Aguilar, A.. Universidad de Barcelona; EspañaInter-Research2010-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/94196Drago, M.; Cardona, L.; Crespo, Enrique Alberto; Grandi, Maria Florencia; Aguilar, A.; Reduction of skull size in South American sea lions reveals density-dependent growth during population recovery; Inter-Research; Marine Ecology Progress Series; 420; 12-2010; 253-2610171-8630CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3354/meps08887info:eu-repo/semantics/altIdentifier/url/http://www.int-res.com/abstracts/meps/v420/p253-261/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:07:52Zoai:ri.conicet.gov.ar:11336/94196instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:07:53.058CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Reduction of skull size in South American sea lions reveals density-dependent growth during population recovery
title Reduction of skull size in South American sea lions reveals density-dependent growth during population recovery
spellingShingle Reduction of skull size in South American sea lions reveals density-dependent growth during population recovery
Drago, M.
ARGENTINE HAKE
CRANIOMETRY
DENSITY-DEPENDENT GROWTH
OTARIA FLAVESCENS
OVERFISHING
SKULL SIZE
SOMATIC GROWTH
SOUTH AMERICAN SEA LION
title_short Reduction of skull size in South American sea lions reveals density-dependent growth during population recovery
title_full Reduction of skull size in South American sea lions reveals density-dependent growth during population recovery
title_fullStr Reduction of skull size in South American sea lions reveals density-dependent growth during population recovery
title_full_unstemmed Reduction of skull size in South American sea lions reveals density-dependent growth during population recovery
title_sort Reduction of skull size in South American sea lions reveals density-dependent growth during population recovery
dc.creator.none.fl_str_mv Drago, M.
Cardona, L.
Crespo, Enrique Alberto
Grandi, Maria Florencia
Aguilar, A.
author Drago, M.
author_facet Drago, M.
Cardona, L.
Crespo, Enrique Alberto
Grandi, Maria Florencia
Aguilar, A.
author_role author
author2 Cardona, L.
Crespo, Enrique Alberto
Grandi, Maria Florencia
Aguilar, A.
author2_role author
author
author
author
dc.subject.none.fl_str_mv ARGENTINE HAKE
CRANIOMETRY
DENSITY-DEPENDENT GROWTH
OTARIA FLAVESCENS
OVERFISHING
SKULL SIZE
SOMATIC GROWTH
SOUTH AMERICAN SEA LION
topic ARGENTINE HAKE
CRANIOMETRY
DENSITY-DEPENDENT GROWTH
OTARIA FLAVESCENS
OVERFISHING
SKULL SIZE
SOMATIC GROWTH
SOUTH AMERICAN SEA LION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Craniometrical data of male and female skulls collected from 1974 to 2007 were used to test the hypothesis that the somatic growth of South American sea lions Otaria flavescens in northern Patagonia has been affected by a reduction in the per capita food availability, due to a combination of the population recovery after cessation of sealing and the development of industrial fishing targeting Argentine hake Merluccius hubbsi. Most of the 19 craniometric variables considered decreased through time in both sexes, and the same trend was found for a variable extracted by means of principal component analysis that was related to skull volume. Most of the reductions in skull size and volume have happened since 1990, when the sea lion population peaked and the hake population collapsed. This evidence, combined with a review of supplementary data derived from stable isotope analysis, supports the hypotheses that the somatic growth of South American sea lions is densitydependent and that industrial fishing has reduced the carrying capacity of the ecosystem for South American sea lions.
Fil: Drago, M.. Universidad de Barcelona; España
Fil: Cardona, L.. Universidad de Barcelona; España
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Grandi, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Aguilar, A.. Universidad de Barcelona; España
description Craniometrical data of male and female skulls collected from 1974 to 2007 were used to test the hypothesis that the somatic growth of South American sea lions Otaria flavescens in northern Patagonia has been affected by a reduction in the per capita food availability, due to a combination of the population recovery after cessation of sealing and the development of industrial fishing targeting Argentine hake Merluccius hubbsi. Most of the 19 craniometric variables considered decreased through time in both sexes, and the same trend was found for a variable extracted by means of principal component analysis that was related to skull volume. Most of the reductions in skull size and volume have happened since 1990, when the sea lion population peaked and the hake population collapsed. This evidence, combined with a review of supplementary data derived from stable isotope analysis, supports the hypotheses that the somatic growth of South American sea lions is densitydependent and that industrial fishing has reduced the carrying capacity of the ecosystem for South American sea lions.
publishDate 2010
dc.date.none.fl_str_mv 2010-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/94196
Drago, M.; Cardona, L.; Crespo, Enrique Alberto; Grandi, Maria Florencia; Aguilar, A.; Reduction of skull size in South American sea lions reveals density-dependent growth during population recovery; Inter-Research; Marine Ecology Progress Series; 420; 12-2010; 253-261
0171-8630
CONICET Digital
CONICET
url http://hdl.handle.net/11336/94196
identifier_str_mv Drago, M.; Cardona, L.; Crespo, Enrique Alberto; Grandi, Maria Florencia; Aguilar, A.; Reduction of skull size in South American sea lions reveals density-dependent growth during population recovery; Inter-Research; Marine Ecology Progress Series; 420; 12-2010; 253-261
0171-8630
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.3354/meps08887
info:eu-repo/semantics/altIdentifier/url/http://www.int-res.com/abstracts/meps/v420/p253-261/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Inter-Research
publisher.none.fl_str_mv Inter-Research
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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