Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis)

Autores
Morgana, Vighi; Borrell, Asunción; Crespo, Enrique Alberto; Oliveira, Larissa R.; Simões Lopes, Paulo C.; Flores, Paulo A. C.; Garcia, Nestor Anibal; Aguilar, Alejandro
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
From the early 17th century to the 1970s southern right whales, Eubalaena australis, were subject to intense exploitation along the Atlantic coast of South America. Catches along this coast recorded by whalers originally formed a continuum from Brazil to Tierra del Fuego. Nevertheless, the recovery of the population has apparently occurred fragmentarily, and with two main areas of concentration, one off southern Brazil (Santa Catarina) and another off central Argentina (Peninsula Valdés). This pattern suggests some level of heterogeneity amongst the population, which is apparently contradicted by records that traced individuals moving throughout the whole geographical extension covered by the species in the Southwest Atlantic. To test the hypothesis of the potential occurrence of discrete subpopulations exploiting specific habitats, we investigated N, C and O isotopic values in 125 bone samples obtained from whaling factories operating in the early 1970s in southern Brazil (n = 72) and from contemporary and more recent strandings occurring in central Argentina (n = 53). Results indicated significant differences between the two sampling areas, being δ13C and δ18O values significantly higher in samples from southern Brazil than in those from central Argentina. This variation was consistent with isotopic baselines from the two areas, indicating the occurrence of some level of structure in the Southwest Atlantic right whale population and equally that whales more likely feed in areas commonly thought to exclusively serve as nursing grounds. Results aim at reconsidering of the units currently used in the management of the southern right whale in the Southwest Atlantic Ocean. In the context of the current die-off affecting the species in Peninsula Valdés, these results also highlight the necessity to better understand movements of individuals and precisely identify their feeding areas.
Fil: Morgana, Vighi. Universidad de Barcelona; España
Fil: Borrell, Asunción. Universidad de Barcelona; España
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Oliveira, Larissa R.. Universidade Vale do Rio dos Sinos; Brasil. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Simões Lopes, Paulo C.. Universidade Federal Santa Catarina; Brasil
Fil: Flores, Paulo A. C.. Centro Nacional de Pesquisa e Conservaçào de Mamíferos Aquáticos; Brasil
Fil: Garcia, Nestor Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Aguilar, Alejandro. Universidad de Barcelona; España
Materia
Eubalaena australis
southern right whale
Southwestern Atlantic
stable isotopes
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:11336/17363
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/17363
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis)Morgana, VighiBorrell, AsunciónCrespo, Enrique AlbertoOliveira, Larissa R.Simões Lopes, Paulo C.Flores, Paulo A. C.Garcia, Nestor AnibalAguilar, AlejandroEubalaena australissouthern right whaleSouthwestern Atlanticstable isotopeshttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1From the early 17th century to the 1970s southern right whales, Eubalaena australis, were subject to intense exploitation along the Atlantic coast of South America. Catches along this coast recorded by whalers originally formed a continuum from Brazil to Tierra del Fuego. Nevertheless, the recovery of the population has apparently occurred fragmentarily, and with two main areas of concentration, one off southern Brazil (Santa Catarina) and another off central Argentina (Peninsula Valdés). This pattern suggests some level of heterogeneity amongst the population, which is apparently contradicted by records that traced individuals moving throughout the whole geographical extension covered by the species in the Southwest Atlantic. To test the hypothesis of the potential occurrence of discrete subpopulations exploiting specific habitats, we investigated N, C and O isotopic values in 125 bone samples obtained from whaling factories operating in the early 1970s in southern Brazil (n = 72) and from contemporary and more recent strandings occurring in central Argentina (n = 53). Results indicated significant differences between the two sampling areas, being δ13C and δ18O values significantly higher in samples from southern Brazil than in those from central Argentina. This variation was consistent with isotopic baselines from the two areas, indicating the occurrence of some level of structure in the Southwest Atlantic right whale population and equally that whales more likely feed in areas commonly thought to exclusively serve as nursing grounds. Results aim at reconsidering of the units currently used in the management of the southern right whale in the Southwest Atlantic Ocean. In the context of the current die-off affecting the species in Peninsula Valdés, these results also highlight the necessity to better understand movements of individuals and precisely identify their feeding areas.Fil: Morgana, Vighi. Universidad de Barcelona; EspañaFil: Borrell, Asunción. Universidad de Barcelona; EspañaFil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Oliveira, Larissa R.. Universidade Vale do Rio dos Sinos; Brasil. Universidade Federal do Rio Grande do Sul; BrasilFil: Simões Lopes, Paulo C.. Universidade Federal Santa Catarina; BrasilFil: Flores, Paulo A. C.. Centro Nacional de Pesquisa e Conservaçào de Mamíferos Aquáticos; BrasilFil: Garcia, Nestor Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Aguilar, Alejandro. Universidad de Barcelona; EspañaPublic Library of Science2014-06-09info: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/11336/17363Morgana, Vighi; Borrell, Asunción; Crespo, Enrique Alberto; Oliveira, Larissa R.; Simões Lopes, Paulo C.; et al.; Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis); Public Library of Science; Plos One; 9; 6; 9-6-2014; 1-8 e904891932-6203enginfo:eu-repo/semantics/altIdentifier/url/http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0100024info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0100024info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:02:48Zoai:ri.conicet.gov.ar:11336/17363instacron: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:34982025-09-03 10:02:48.849CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis)
title Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis)
spellingShingle Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis)
Morgana, Vighi
Eubalaena australis
southern right whale
Southwestern Atlantic
stable isotopes
title_short Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis)
title_full Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis)
title_fullStr Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis)
title_full_unstemmed Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis)
title_sort Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis)
dc.creator.none.fl_str_mv Morgana, Vighi
Borrell, Asunción
Crespo, Enrique Alberto
Oliveira, Larissa R.
Simões Lopes, Paulo C.
Flores, Paulo A. C.
Garcia, Nestor Anibal
Aguilar, Alejandro
author Morgana, Vighi
author_facet Morgana, Vighi
Borrell, Asunción
Crespo, Enrique Alberto
Oliveira, Larissa R.
Simões Lopes, Paulo C.
Flores, Paulo A. C.
Garcia, Nestor Anibal
Aguilar, Alejandro
author_role author
author2 Borrell, Asunción
Crespo, Enrique Alberto
Oliveira, Larissa R.
Simões Lopes, Paulo C.
Flores, Paulo A. C.
Garcia, Nestor Anibal
Aguilar, Alejandro
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Eubalaena australis
southern right whale
Southwestern Atlantic
stable isotopes
topic Eubalaena australis
southern right whale
Southwestern Atlantic
stable isotopes
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv From the early 17th century to the 1970s southern right whales, Eubalaena australis, were subject to intense exploitation along the Atlantic coast of South America. Catches along this coast recorded by whalers originally formed a continuum from Brazil to Tierra del Fuego. Nevertheless, the recovery of the population has apparently occurred fragmentarily, and with two main areas of concentration, one off southern Brazil (Santa Catarina) and another off central Argentina (Peninsula Valdés). This pattern suggests some level of heterogeneity amongst the population, which is apparently contradicted by records that traced individuals moving throughout the whole geographical extension covered by the species in the Southwest Atlantic. To test the hypothesis of the potential occurrence of discrete subpopulations exploiting specific habitats, we investigated N, C and O isotopic values in 125 bone samples obtained from whaling factories operating in the early 1970s in southern Brazil (n = 72) and from contemporary and more recent strandings occurring in central Argentina (n = 53). Results indicated significant differences between the two sampling areas, being δ13C and δ18O values significantly higher in samples from southern Brazil than in those from central Argentina. This variation was consistent with isotopic baselines from the two areas, indicating the occurrence of some level of structure in the Southwest Atlantic right whale population and equally that whales more likely feed in areas commonly thought to exclusively serve as nursing grounds. Results aim at reconsidering of the units currently used in the management of the southern right whale in the Southwest Atlantic Ocean. In the context of the current die-off affecting the species in Peninsula Valdés, these results also highlight the necessity to better understand movements of individuals and precisely identify their feeding areas.
Fil: Morgana, Vighi. Universidad de Barcelona; España
Fil: Borrell, Asunción. Universidad de Barcelona; España
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Oliveira, Larissa R.. Universidade Vale do Rio dos Sinos; Brasil. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Simões Lopes, Paulo C.. Universidade Federal Santa Catarina; Brasil
Fil: Flores, Paulo A. C.. Centro Nacional de Pesquisa e Conservaçào de Mamíferos Aquáticos; Brasil
Fil: Garcia, Nestor Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Aguilar, Alejandro. Universidad de Barcelona; España
description From the early 17th century to the 1970s southern right whales, Eubalaena australis, were subject to intense exploitation along the Atlantic coast of South America. Catches along this coast recorded by whalers originally formed a continuum from Brazil to Tierra del Fuego. Nevertheless, the recovery of the population has apparently occurred fragmentarily, and with two main areas of concentration, one off southern Brazil (Santa Catarina) and another off central Argentina (Peninsula Valdés). This pattern suggests some level of heterogeneity amongst the population, which is apparently contradicted by records that traced individuals moving throughout the whole geographical extension covered by the species in the Southwest Atlantic. To test the hypothesis of the potential occurrence of discrete subpopulations exploiting specific habitats, we investigated N, C and O isotopic values in 125 bone samples obtained from whaling factories operating in the early 1970s in southern Brazil (n = 72) and from contemporary and more recent strandings occurring in central Argentina (n = 53). Results indicated significant differences between the two sampling areas, being δ13C and δ18O values significantly higher in samples from southern Brazil than in those from central Argentina. This variation was consistent with isotopic baselines from the two areas, indicating the occurrence of some level of structure in the Southwest Atlantic right whale population and equally that whales more likely feed in areas commonly thought to exclusively serve as nursing grounds. Results aim at reconsidering of the units currently used in the management of the southern right whale in the Southwest Atlantic Ocean. In the context of the current die-off affecting the species in Peninsula Valdés, these results also highlight the necessity to better understand movements of individuals and precisely identify their feeding areas.
publishDate 2014
dc.date.none.fl_str_mv 2014-06-09
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/11336/17363
Morgana, Vighi; Borrell, Asunción; Crespo, Enrique Alberto; Oliveira, Larissa R.; Simões Lopes, Paulo C.; et al.; Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis); Public Library of Science; Plos One; 9; 6; 9-6-2014; 1-8 e90489
1932-6203
url http://hdl.handle.net/11336/17363
identifier_str_mv Morgana, Vighi; Borrell, Asunción; Crespo, Enrique Alberto; Oliveira, Larissa R.; Simões Lopes, Paulo C.; et al.; Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis); Public Library of Science; Plos One; 9; 6; 9-6-2014; 1-8 e90489
1932-6203
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0100024
info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0100024
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 Public Library of Science
publisher.none.fl_str_mv Public Library of Science
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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