Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis)
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...
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ftconicet:oai:ri.conicet.gov.ar:11336/17363 2023-10-09T21:56:05+02:00 Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis) Morgana, Vighi Borrell, Asunción Crespo, Enrique Alberto Oliveira, Larissa R. Simões Lopes, Paulo C. Flores, Paulo A. C. Garcia, Nestor Anibal Aguilar, Alejandro application/pdf http://hdl.handle.net/11336/17363 eng eng Public Library of Science 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 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 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Eubalaena australis southern right whale Southwestern Atlantic stable isotopes https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1371/journal.pone.0100024 2023-09-24T19:49:02Z 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, ... Article in Journal/Newspaper Southern Right Whale Tierra del Fuego CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentina PLoS ONE 9 6 e100024 |
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Open Polar |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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language |
English |
topic |
Eubalaena australis southern right whale Southwestern Atlantic stable isotopes https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
Eubalaena australis southern right whale Southwestern Atlantic stable isotopes https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Morgana, Vighi Borrell, Asunción Crespo, Enrique Alberto Oliveira, Larissa R. Simões Lopes, Paulo C. Flores, Paulo A. C. Garcia, Nestor Anibal Aguilar, Alejandro Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis) |
topic_facet |
Eubalaena australis southern right whale Southwestern Atlantic stable isotopes https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
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. Fil: Morgana, Vighi. Universidad de Barcelona; España Fil: Borrell, Asunción. Universidad de Barcelona; España Fil: Crespo, ... |
format |
Article in Journal/Newspaper |
author |
Morgana, Vighi Borrell, Asunción Crespo, Enrique Alberto Oliveira, Larissa R. Simões Lopes, Paulo C. Flores, Paulo A. C. Garcia, Nestor Anibal Aguilar, Alejandro |
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_sort |
Morgana, Vighi |
title |
Stable isotopes indicate population structuring in the southwest Atlantic population of right whales (Eubalaena australis) |
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) |
publisher |
Public Library of Science |
url |
http://hdl.handle.net/11336/17363 |
geographic |
Argentina |
geographic_facet |
Argentina |
genre |
Southern Right Whale Tierra del Fuego |
genre_facet |
Southern Right Whale Tierra del Fuego |
op_relation |
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 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 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1371/journal.pone.0100024 |
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PLoS ONE |
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