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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Autores: Vighi, Morgana, Borrell Thió, Assumpció, Crespo, Enrique A., Oliveira, Larissa R., Simões Lopes, Paulo C., Flores, Paulo C., García, Néstor A., Aguilar, Àlex
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2014
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/52263
Acceso en línea:https://hdl.handle.net/2445/52263
Access Level:acceso abierto
Palabra clave:Balenes
Ecologia marina
Biologia de poblacions
Poblacions animals
Atlàntic, Oceà
Whales
Marine ecology
Population biology
Animal populations
Atlantic Ocean
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spelling Stable isotopes indicate population structuring in the Southwest Atlantic population of right whales (Eubalaena australis)Vighi, MorganaBorrell Thió, AssumpcióCrespo, Enrique A.Oliveira, Larissa R.Simões Lopes, Paulo C.Flores, Paulo C.García, Néstor A.Aguilar, ÀlexBalenesEcologia marinaBiologia de poblacionsPoblacions animalsAtlàntic, OceàWhalesMarine ecologyPopulation biologyAnimal populationsAtlantic OceanFrom 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.Public Library of Science (PLoS)2014info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/52263Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: http://dx.doi.org/10.1371/journal.pone.0090489PLoS One, 2014, vol. 9, num. 3, p. e90489http://dx.doi.org/10.1371/journal.pone.0090489cc-by (c) Vighi, M. et al., 2014http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/522632026-05-27T06:46:51Z
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)
Vighi, Morgana
Balenes
Ecologia marina
Biologia de poblacions
Poblacions animals
Atlàntic, Oceà
Whales
Marine ecology
Population biology
Animal populations
Atlantic Ocean
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 Vighi, Morgana
Borrell Thió, Assumpció
Crespo, Enrique A.
Oliveira, Larissa R.
Simões Lopes, Paulo C.
Flores, Paulo C.
García, Néstor A.
Aguilar, Àlex
author Vighi, Morgana
author_facet Vighi, Morgana
Borrell Thió, Assumpció
Crespo, Enrique A.
Oliveira, Larissa R.
Simões Lopes, Paulo C.
Flores, Paulo C.
García, Néstor A.
Aguilar, Àlex
author_role author
author2 Borrell Thió, Assumpció
Crespo, Enrique A.
Oliveira, Larissa R.
Simões Lopes, Paulo C.
Flores, Paulo C.
García, Néstor A.
Aguilar, Àlex
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Balenes
Ecologia marina
Biologia de poblacions
Poblacions animals
Atlàntic, Oceà
Whales
Marine ecology
Population biology
Animal populations
Atlantic Ocean
topic Balenes
Ecologia marina
Biologia de poblacions
Poblacions animals
Atlàntic, Oceà
Whales
Marine ecology
Population biology
Animal populations
Atlantic Ocean
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
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/52263
url https://hdl.handle.net/2445/52263
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: http://dx.doi.org/10.1371/journal.pone.0090489
PLoS One, 2014, vol. 9, num. 3, p. e90489
http://dx.doi.org/10.1371/journal.pone.0090489
dc.rights.none.fl_str_mv cc-by (c) Vighi, M. et al., 2014
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Vighi, M. et al., 2014
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Public Library of Science (PLoS)
publisher.none.fl_str_mv Public Library of Science (PLoS)
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.198674

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