Sexual foraging segregation in South American sea lions increases during the pre-breeding period in the Río de la Plata plume

Autores
Drago, M.; Franco Trecu, V.; Zenteno, L.; Szteren, D.; Crespo, Enrique Alberto; Riet Sapriza, F. G.; de Oliveira, L.; Machado, R.; Inchausti, P.; Cardona, L.
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Stable carbon and nitrogen isotopes in skin and bone of South American sea lionsfrom Brazil and Uruguay were analysed to test the hypothesis that trophic overlap between the sexes is lower during the pre-breeding season than throughout the rest of the year. The isotopic values of skin and bone were used to infer the trophic relationships between the sexes during the pre-breeding period and year round, respectively. Prey species were also analysed to establish a baseline necessary for interpreting the stable isotope ratios of skin and bone. Standard ellipse areas, estimated using Bayesian inference in the SIBER routine of the SIAR package in R, suggested that males and females used a wide diversity of foraging strategies throughout the year and that no differences existed between the sexes. However, the diversity of foraging strategies was largely reduced during the pre-breeding period, with all the individuals of each sex adopting similar strategies, but with the two sexes differing considerably in stable isotope values and the ellipse areas of males and females not overlapping at all. Nevertheless, the results revealed a general increase in the consumption of pelagic prey by both sexes during the pre-breeding period. The progressive crowding of individuals in the areas surrounding the breeding rookeries during the pre-breeding period could lead to an increase in the local population density, which could explain the above reported changes.
Fil: Drago, M.. Universidad de la Republica. Centro de Estudios Interdiciplinarios Uruguayos; Uruguay
Fil: Franco Trecu, V.. Universidad de la República. Facultad de Ciencias; Uruguay
Fil: Zenteno, L.. Universidad de Barcelona; España
Fil: Szteren, D.. Universidad de la República. Facultad de Ciencias; Uruguay
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Riet Sapriza, F. G.. Universidad del Uruguay. Facultad de Ciencias; Uruguay
Fil: de Oliveira, L.. Study Group of Aquatic Mammals of Rio Grande do Sul; Brasil
Fil: Machado, R.. Study Group of Aquatic Mammals of Rio Grande do Sul; Brasil. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Inchausti, P.. Universidad de la Republica. Centro de Estudios Interdiciplinarios Uruguayos; Uruguay
Fil: Cardona, L.. Universidad de Barcelona; España
Materia
BONE
OTARIA FLAVESCENS
SEXUAL FORAGING SEGREGATION
SKIN
STABLE ISOTOPE BAYESIAN ELLIPSES
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:11336/5633
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/5633
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Sexual foraging segregation in South American sea lions increases during the pre-breeding period in the Río de la Plata plumeDrago, M.Franco Trecu, V.Zenteno, L.Szteren, D.Crespo, Enrique AlbertoRiet Sapriza, F. G.de Oliveira, L.Machado, R.Inchausti, P.Cardona, L.BONEOTARIA FLAVESCENSSEXUAL FORAGING SEGREGATIONSKINSTABLE ISOTOPE BAYESIAN ELLIPSEShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Stable carbon and nitrogen isotopes in skin and bone of South American sea lionsfrom Brazil and Uruguay were analysed to test the hypothesis that trophic overlap between the sexes is lower during the pre-breeding season than throughout the rest of the year. The isotopic values of skin and bone were used to infer the trophic relationships between the sexes during the pre-breeding period and year round, respectively. Prey species were also analysed to establish a baseline necessary for interpreting the stable isotope ratios of skin and bone. Standard ellipse areas, estimated using Bayesian inference in the SIBER routine of the SIAR package in R, suggested that males and females used a wide diversity of foraging strategies throughout the year and that no differences existed between the sexes. However, the diversity of foraging strategies was largely reduced during the pre-breeding period, with all the individuals of each sex adopting similar strategies, but with the two sexes differing considerably in stable isotope values and the ellipse areas of males and females not overlapping at all. Nevertheless, the results revealed a general increase in the consumption of pelagic prey by both sexes during the pre-breeding period. The progressive crowding of individuals in the areas surrounding the breeding rookeries during the pre-breeding period could lead to an increase in the local population density, which could explain the above reported changes.Fil: Drago, M.. Universidad de la Republica. Centro de Estudios Interdiciplinarios Uruguayos; UruguayFil: Franco Trecu, V.. Universidad de la República. Facultad de Ciencias; UruguayFil: Zenteno, L.. Universidad de Barcelona; EspañaFil: Szteren, D.. Universidad de la República. Facultad de Ciencias; UruguayFil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Riet Sapriza, F. G.. Universidad del Uruguay. Facultad de Ciencias; UruguayFil: de Oliveira, L.. Study Group of Aquatic Mammals of Rio Grande do Sul; BrasilFil: Machado, R.. Study Group of Aquatic Mammals of Rio Grande do Sul; Brasil. Universidade Federal do Rio Grande do Sul; BrasilFil: Inchausti, P.. Universidad de la Republica. Centro de Estudios Interdiciplinarios Uruguayos; UruguayFil: Cardona, L.. Universidad de Barcelona; EspañaInter-Research2015-04info: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/pdfhttp://hdl.handle.net/11336/5633Drago, M.; Franco Trecu, V.; Zenteno, L.; Szteren, D.; Crespo, Enrique Alberto; et al.; Sexual foraging segregation in South American sea lions increases during the pre-breeding period in the Río de la Plata plume; Inter-Research; Marine Ecology Progress Series; 525; 4-2015; 261-2720171-8630enginfo:eu-repo/semantics/altIdentifier/url/http://www.int-res.com/abstracts/meps/v525/p261-272/info:eu-repo/semantics/altIdentifier/doi/10.3354/meps11236info:eu-repo/semantics/embargoedAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:01:46Zoai:ri.conicet.gov.ar:11336/5633instacron: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 11:01:46.641CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Sexual foraging segregation in South American sea lions increases during the pre-breeding period in the Río de la Plata plume
title Sexual foraging segregation in South American sea lions increases during the pre-breeding period in the Río de la Plata plume
spellingShingle Sexual foraging segregation in South American sea lions increases during the pre-breeding period in the Río de la Plata plume
Drago, M.
BONE
OTARIA FLAVESCENS
SEXUAL FORAGING SEGREGATION
SKIN
STABLE ISOTOPE BAYESIAN ELLIPSES
title_short Sexual foraging segregation in South American sea lions increases during the pre-breeding period in the Río de la Plata plume
title_full Sexual foraging segregation in South American sea lions increases during the pre-breeding period in the Río de la Plata plume
title_fullStr Sexual foraging segregation in South American sea lions increases during the pre-breeding period in the Río de la Plata plume
title_full_unstemmed Sexual foraging segregation in South American sea lions increases during the pre-breeding period in the Río de la Plata plume
title_sort Sexual foraging segregation in South American sea lions increases during the pre-breeding period in the Río de la Plata plume
dc.creator.none.fl_str_mv Drago, M.
Franco Trecu, V.
Zenteno, L.
Szteren, D.
Crespo, Enrique Alberto
Riet Sapriza, F. G.
de Oliveira, L.
Machado, R.
Inchausti, P.
Cardona, L.
author Drago, M.
author_facet Drago, M.
Franco Trecu, V.
Zenteno, L.
Szteren, D.
Crespo, Enrique Alberto
Riet Sapriza, F. G.
de Oliveira, L.
Machado, R.
Inchausti, P.
Cardona, L.
author_role author
author2 Franco Trecu, V.
Zenteno, L.
Szteren, D.
Crespo, Enrique Alberto
Riet Sapriza, F. G.
de Oliveira, L.
Machado, R.
Inchausti, P.
Cardona, L.
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv BONE
OTARIA FLAVESCENS
SEXUAL FORAGING SEGREGATION
SKIN
STABLE ISOTOPE BAYESIAN ELLIPSES
topic BONE
OTARIA FLAVESCENS
SEXUAL FORAGING SEGREGATION
SKIN
STABLE ISOTOPE BAYESIAN ELLIPSES
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Stable carbon and nitrogen isotopes in skin and bone of South American sea lionsfrom Brazil and Uruguay were analysed to test the hypothesis that trophic overlap between the sexes is lower during the pre-breeding season than throughout the rest of the year. The isotopic values of skin and bone were used to infer the trophic relationships between the sexes during the pre-breeding period and year round, respectively. Prey species were also analysed to establish a baseline necessary for interpreting the stable isotope ratios of skin and bone. Standard ellipse areas, estimated using Bayesian inference in the SIBER routine of the SIAR package in R, suggested that males and females used a wide diversity of foraging strategies throughout the year and that no differences existed between the sexes. However, the diversity of foraging strategies was largely reduced during the pre-breeding period, with all the individuals of each sex adopting similar strategies, but with the two sexes differing considerably in stable isotope values and the ellipse areas of males and females not overlapping at all. Nevertheless, the results revealed a general increase in the consumption of pelagic prey by both sexes during the pre-breeding period. The progressive crowding of individuals in the areas surrounding the breeding rookeries during the pre-breeding period could lead to an increase in the local population density, which could explain the above reported changes.
Fil: Drago, M.. Universidad de la Republica. Centro de Estudios Interdiciplinarios Uruguayos; Uruguay
Fil: Franco Trecu, V.. Universidad de la República. Facultad de Ciencias; Uruguay
Fil: Zenteno, L.. Universidad de Barcelona; España
Fil: Szteren, D.. Universidad de la República. Facultad de Ciencias; Uruguay
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Riet Sapriza, F. G.. Universidad del Uruguay. Facultad de Ciencias; Uruguay
Fil: de Oliveira, L.. Study Group of Aquatic Mammals of Rio Grande do Sul; Brasil
Fil: Machado, R.. Study Group of Aquatic Mammals of Rio Grande do Sul; Brasil. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Inchausti, P.. Universidad de la Republica. Centro de Estudios Interdiciplinarios Uruguayos; Uruguay
Fil: Cardona, L.. Universidad de Barcelona; España
description Stable carbon and nitrogen isotopes in skin and bone of South American sea lionsfrom Brazil and Uruguay were analysed to test the hypothesis that trophic overlap between the sexes is lower during the pre-breeding season than throughout the rest of the year. The isotopic values of skin and bone were used to infer the trophic relationships between the sexes during the pre-breeding period and year round, respectively. Prey species were also analysed to establish a baseline necessary for interpreting the stable isotope ratios of skin and bone. Standard ellipse areas, estimated using Bayesian inference in the SIBER routine of the SIAR package in R, suggested that males and females used a wide diversity of foraging strategies throughout the year and that no differences existed between the sexes. However, the diversity of foraging strategies was largely reduced during the pre-breeding period, with all the individuals of each sex adopting similar strategies, but with the two sexes differing considerably in stable isotope values and the ellipse areas of males and females not overlapping at all. Nevertheless, the results revealed a general increase in the consumption of pelagic prey by both sexes during the pre-breeding period. The progressive crowding of individuals in the areas surrounding the breeding rookeries during the pre-breeding period could lead to an increase in the local population density, which could explain the above reported changes.
publishDate 2015
dc.date.none.fl_str_mv 2015-04
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/11336/5633
Drago, M.; Franco Trecu, V.; Zenteno, L.; Szteren, D.; Crespo, Enrique Alberto; et al.; Sexual foraging segregation in South American sea lions increases during the pre-breeding period in the Río de la Plata plume; Inter-Research; Marine Ecology Progress Series; 525; 4-2015; 261-272
0171-8630
url http://hdl.handle.net/11336/5633
identifier_str_mv Drago, M.; Franco Trecu, V.; Zenteno, L.; Szteren, D.; Crespo, Enrique Alberto; et al.; Sexual foraging segregation in South American sea lions increases during the pre-breeding period in the Río de la Plata plume; Inter-Research; Marine Ecology Progress Series; 525; 4-2015; 261-272
0171-8630
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.int-res.com/abstracts/meps/v525/p261-272/
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps11236
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
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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