Ontogenetic dietary changes in male South American fur seals Arctocephalus australis in Patagonia

Autores
Vales, Damián Gustavo; Cardona, Luis; Garcia, Nestor Anibal; Zenteno, Lisette; Crespo, Enrique Alberto
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This study assessed ontogenetic dietary changes in male South American fur sealsArctocephalus australis in northern and central Patagonia (Argentina) using stable isotope ratios (δ15N and δ13C) in vibrissae and bones. Sucking pups were characterised by higher δ15N values and lower δ13C values than older specimens. Weaning was associated with a marked drop of δ15N values, both in bone and vibrissae. Such a drop was inconsistent with the consumption of local prey and may reveal movement to distant foraging grounds or physiological changes associatedwith either fasting or rapid growth. Stable isotope ratios indicated that juveniles fed more pelagically than subadults and adults, but that there were no major differences between the 2 latter age categories. As subadults and adults are rather similar in body mass and are much larger than juveniles, body mass may play a role in the ontogenetic dietary changes reported. Nevertheless, demersal benthic prey were always scarce in the diet of male fur seals, which relied primarily onArgentine shortfin squid and small pelagic fish throughout life, though adults also consumed large amounts of decapod crustaceans available at shallow depths. Vibrissae did not reveal regular oscillations of δ15N or δ13C, except in 1 individual. Thus, male fur seals from northern and central Patagonia do not appear to migrate regularly between isotopically distinct areas, although nomadic displacements cannot be ruled out.
Fil: Vales, Damián Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Cardona, Luis. Universidad de Barcelona. Facultad de Biología. Departamento de Biología Animal; España
Fil: Garcia, Nestor Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Zenteno, Lisette. Universidad de Barcelona. Facultad de Biología. Departamento de Biología Animal; España
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Materia
FORAGING ECOLOGY
PINNIPED
ARCTOCEPHALUS AUSTRALIS
ONTOGENETIC DIETARY CHANGE
STABLE ISOTOPE ANALYSIS
δ15N
δ13C
PATAGONIA
Nivel de accesibilidad
acceso embargado
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:11336/21410
Acceder
id CONICETDig_e92b530a8aaaa7e61fe05ca1cd2f33e5
oai_identifier_str oai:ri.conicet.gov.ar:11336/21410
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Ontogenetic dietary changes in male South American fur seals Arctocephalus australis in PatagoniaVales, Damián GustavoCardona, LuisGarcia, Nestor AnibalZenteno, LisetteCrespo, Enrique AlbertoFORAGING ECOLOGYPINNIPEDARCTOCEPHALUS AUSTRALISONTOGENETIC DIETARY CHANGESTABLE ISOTOPE ANALYSISδ15Nδ13CPATAGONIAhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1This study assessed ontogenetic dietary changes in male South American fur sealsArctocephalus australis in northern and central Patagonia (Argentina) using stable isotope ratios (δ15N and δ13C) in vibrissae and bones. Sucking pups were characterised by higher δ15N values and lower δ13C values than older specimens. Weaning was associated with a marked drop of δ15N values, both in bone and vibrissae. Such a drop was inconsistent with the consumption of local prey and may reveal movement to distant foraging grounds or physiological changes associatedwith either fasting or rapid growth. Stable isotope ratios indicated that juveniles fed more pelagically than subadults and adults, but that there were no major differences between the 2 latter age categories. As subadults and adults are rather similar in body mass and are much larger than juveniles, body mass may play a role in the ontogenetic dietary changes reported. Nevertheless, demersal benthic prey were always scarce in the diet of male fur seals, which relied primarily onArgentine shortfin squid and small pelagic fish throughout life, though adults also consumed large amounts of decapod crustaceans available at shallow depths. Vibrissae did not reveal regular oscillations of δ15N or δ13C, except in 1 individual. Thus, male fur seals from northern and central Patagonia do not appear to migrate regularly between isotopically distinct areas, although nomadic displacements cannot be ruled out.Fil: Vales, Damián Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Cardona, Luis. Universidad de Barcelona. Facultad de Biología. Departamento de Biología Animal; EspañaFil: Garcia, Nestor Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Zenteno, Lisette. Universidad de Barcelona. Facultad de Biología. Departamento de Biología Animal; EspañaFil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaInter-Research2015-04-09info:eu-repo/date/embargoEnd/2020-04-10info: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/11336/21410Vales, Damián Gustavo; Cardona, Luis; Garcia, Nestor Anibal; Zenteno, Lisette; Crespo, Enrique Alberto; Ontogenetic dietary changes in male South American fur seals Arctocephalus australis in Patagonia; Inter-Research; Marine Ecology Progress Series; 525; 9-4-2015; 245-2600171-86301616-1599CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3354/meps11214info:eu-repo/semantics/altIdentifier/url/https://www.int-res.com/abstracts/meps/v525/p245-260/info:eu-repo/semantics/embargoedAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:24:17Zoai:ri.conicet.gov.ar:11336/21410instacron: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:34982025-09-10 13:24:17.667CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Ontogenetic dietary changes in male South American fur seals Arctocephalus australis in Patagonia
title Ontogenetic dietary changes in male South American fur seals Arctocephalus australis in Patagonia
spellingShingle Ontogenetic dietary changes in male South American fur seals Arctocephalus australis in Patagonia
Vales, Damián Gustavo
FORAGING ECOLOGY
PINNIPED
ARCTOCEPHALUS AUSTRALIS
ONTOGENETIC DIETARY CHANGE
STABLE ISOTOPE ANALYSIS
δ15N
δ13C
PATAGONIA
title_short Ontogenetic dietary changes in male South American fur seals Arctocephalus australis in Patagonia
title_full Ontogenetic dietary changes in male South American fur seals Arctocephalus australis in Patagonia
title_fullStr Ontogenetic dietary changes in male South American fur seals Arctocephalus australis in Patagonia
title_full_unstemmed Ontogenetic dietary changes in male South American fur seals Arctocephalus australis in Patagonia
title_sort Ontogenetic dietary changes in male South American fur seals Arctocephalus australis in Patagonia
dc.creator.none.fl_str_mv Vales, Damián Gustavo
Cardona, Luis
Garcia, Nestor Anibal
Zenteno, Lisette
Crespo, Enrique Alberto
author Vales, Damián Gustavo
author_facet Vales, Damián Gustavo
Cardona, Luis
Garcia, Nestor Anibal
Zenteno, Lisette
Crespo, Enrique Alberto
author_role author
author2 Cardona, Luis
Garcia, Nestor Anibal
Zenteno, Lisette
Crespo, Enrique Alberto
author2_role author
author
author
author
dc.subject.none.fl_str_mv FORAGING ECOLOGY
PINNIPED
ARCTOCEPHALUS AUSTRALIS
ONTOGENETIC DIETARY CHANGE
STABLE ISOTOPE ANALYSIS
δ15N
δ13C
PATAGONIA
topic FORAGING ECOLOGY
PINNIPED
ARCTOCEPHALUS AUSTRALIS
ONTOGENETIC DIETARY CHANGE
STABLE ISOTOPE ANALYSIS
δ15N
δ13C
PATAGONIA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv This study assessed ontogenetic dietary changes in male South American fur sealsArctocephalus australis in northern and central Patagonia (Argentina) using stable isotope ratios (δ15N and δ13C) in vibrissae and bones. Sucking pups were characterised by higher δ15N values and lower δ13C values than older specimens. Weaning was associated with a marked drop of δ15N values, both in bone and vibrissae. Such a drop was inconsistent with the consumption of local prey and may reveal movement to distant foraging grounds or physiological changes associatedwith either fasting or rapid growth. Stable isotope ratios indicated that juveniles fed more pelagically than subadults and adults, but that there were no major differences between the 2 latter age categories. As subadults and adults are rather similar in body mass and are much larger than juveniles, body mass may play a role in the ontogenetic dietary changes reported. Nevertheless, demersal benthic prey were always scarce in the diet of male fur seals, which relied primarily onArgentine shortfin squid and small pelagic fish throughout life, though adults also consumed large amounts of decapod crustaceans available at shallow depths. Vibrissae did not reveal regular oscillations of δ15N or δ13C, except in 1 individual. Thus, male fur seals from northern and central Patagonia do not appear to migrate regularly between isotopically distinct areas, although nomadic displacements cannot be ruled out.
Fil: Vales, Damián Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Cardona, Luis. Universidad de Barcelona. Facultad de Biología. Departamento de Biología Animal; España
Fil: Garcia, Nestor Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Zenteno, Lisette. Universidad de Barcelona. Facultad de Biología. Departamento de Biología Animal; España
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
description This study assessed ontogenetic dietary changes in male South American fur sealsArctocephalus australis in northern and central Patagonia (Argentina) using stable isotope ratios (δ15N and δ13C) in vibrissae and bones. Sucking pups were characterised by higher δ15N values and lower δ13C values than older specimens. Weaning was associated with a marked drop of δ15N values, both in bone and vibrissae. Such a drop was inconsistent with the consumption of local prey and may reveal movement to distant foraging grounds or physiological changes associatedwith either fasting or rapid growth. Stable isotope ratios indicated that juveniles fed more pelagically than subadults and adults, but that there were no major differences between the 2 latter age categories. As subadults and adults are rather similar in body mass and are much larger than juveniles, body mass may play a role in the ontogenetic dietary changes reported. Nevertheless, demersal benthic prey were always scarce in the diet of male fur seals, which relied primarily onArgentine shortfin squid and small pelagic fish throughout life, though adults also consumed large amounts of decapod crustaceans available at shallow depths. Vibrissae did not reveal regular oscillations of δ15N or δ13C, except in 1 individual. Thus, male fur seals from northern and central Patagonia do not appear to migrate regularly between isotopically distinct areas, although nomadic displacements cannot be ruled out.
publishDate 2015
dc.date.none.fl_str_mv 2015-04-09
info:eu-repo/date/embargoEnd/2020-04-10
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/11336/21410
Vales, Damián Gustavo; Cardona, Luis; Garcia, Nestor Anibal; Zenteno, Lisette; Crespo, Enrique Alberto; Ontogenetic dietary changes in male South American fur seals Arctocephalus australis in Patagonia; Inter-Research; Marine Ecology Progress Series; 525; 9-4-2015; 245-260
0171-8630
1616-1599
CONICET Digital
CONICET
url http://hdl.handle.net/11336/21410
identifier_str_mv Vales, Damián Gustavo; Cardona, Luis; Garcia, Nestor Anibal; Zenteno, Lisette; Crespo, Enrique Alberto; Ontogenetic dietary changes in male South American fur seals Arctocephalus australis in Patagonia; Inter-Research; Marine Ecology Progress Series; 525; 9-4-2015; 245-260
0171-8630
1616-1599
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/meps11214
info:eu-repo/semantics/altIdentifier/url/https://www.int-res.com/abstracts/meps/v525/p245-260/
dc.rights.none.fl_str_mv info:eu-repo/semantics/embargoedAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv embargoedAccess
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 12.993085

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