Geographic assignment of seabirds to their origin: combining morphology, genetics and biogeochemical analyses

Longline fisheries, oil spills, and offshore wind farms are some of the major threats increasing seabird mortality at sea, but the impact of these threats on specific populations has been difficult to determine so far. We tested the use of molecular markers, morphometric measures, and stable isotope...

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Autores: Gómez Díaz, Elena, González-Solís, Jacob
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2007
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/61364
Acesso em linha:https://hdl.handle.net/2445/61364
Access Level:acceso abierto
Palavra-chave:Ocells marins
Genètica de poblacions
Morfologia animal
Marcadors bioquímics
Sea birds
Population Genetics
Animal morphology
Biochemical markers
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spelling Geographic assignment of seabirds to their origin: combining morphology, genetics and biogeochemical analysesGómez Díaz, ElenaGonzález-Solís, JacobOcells marinsGenètica de poblacionsMorfologia animalMarcadors bioquímicsSea birdsPopulation GeneticsAnimal morphologyBiochemical markersLongline fisheries, oil spills, and offshore wind farms are some of the major threats increasing seabird mortality at sea, but the impact of these threats on specific populations has been difficult to determine so far. We tested the use of molecular markers, morphometric measures, and stable isotope (δ15N and δ13C) and trace element concentrations in the first primary feather (grown at the end of the breeding period) to assign the geographic origin of Calonectris shearwaters. Overall, we sampled birds from three taxa: 13 Mediterranean Cory's Shearwater (Calonectris diomedea diomedea) breeding sites, 10 Atlantic Cory's Shearwater (Calonectris diomedea borealis) breeding sites, and one Cape Verde Shearwater (C. edwardsii) breeding site. Assignment rates were investigated at three spatial scales: breeding colony, breeding archipelago, and taxa levels. Genetic analyses based on the mitochondrial control region (198 birds from 21 breeding colonies) correctly assigned 100% of birds to the three main taxa but failed in detecting geographic structuring at lower scales. Discriminant analyses based on trace elements composition achieved the best rate of correct assignment to colony (77.5%). Body measurements or stable isotopes mainly succeeded in assigning individuals among taxa (87.9% and 89.9%, respectively) but failed at the colony level (27.1% and 38.0%, respectively). Combining all three approaches (morphometrics, isotopes, and trace elements on 186 birds from 15 breeding colonies) substantially improved correct classifications (86.0%, 90.7%, and 100% among colonies, archipelagos, and taxa, respectively). Validations using two independent data sets and jackknife cross-validation confirmed the robustness of the combined approach in the colony assignment (62.5%, 58.8%, and 69.8% for each validation test, respectively). A preliminary application of the discriminant model based on stable isotope δ15N and δ13C values and trace elements (219 birds from 17 breeding sites) showed that 41 Cory's Shearwaters caught by western Mediterranean long-liners came mainly from breeding colonies in Menorca (48.8%), Ibiza (14.6%), and Crete (31.7%). Our findings show that combining analyses of trace elements and stable isotopes on feathers can achieve high rates of correct geographic assignment of birds in the marine environment, opening new prospects for the study of seabird mortality at sea.Ecological Society of America2015201520072015info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion15 p.application/pdfhttps://hdl.handle.net/2445/61364Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: http://dx.doi.org/10.1890/06-1232.1Ecological Applications, 2007, vol. 17, num. 5, p. 1484-1498http://dx.doi.org/10.1890/06-1232.1(c) Ecological Society of America, 2007info:eu-repo/semantics/openAccessoai:recercat.cat:2445/613642026-05-29T05:05:01Z
dc.title.none.fl_str_mv Geographic assignment of seabirds to their origin: combining morphology, genetics and biogeochemical analyses
title Geographic assignment of seabirds to their origin: combining morphology, genetics and biogeochemical analyses
spellingShingle Geographic assignment of seabirds to their origin: combining morphology, genetics and biogeochemical analyses
Gómez Díaz, Elena
Ocells marins
Genètica de poblacions
Morfologia animal
Marcadors bioquímics
Sea birds
Population Genetics
Animal morphology
Biochemical markers
title_short Geographic assignment of seabirds to their origin: combining morphology, genetics and biogeochemical analyses
title_full Geographic assignment of seabirds to their origin: combining morphology, genetics and biogeochemical analyses
title_fullStr Geographic assignment of seabirds to their origin: combining morphology, genetics and biogeochemical analyses
title_full_unstemmed Geographic assignment of seabirds to their origin: combining morphology, genetics and biogeochemical analyses
title_sort Geographic assignment of seabirds to their origin: combining morphology, genetics and biogeochemical analyses
dc.creator.none.fl_str_mv Gómez Díaz, Elena
González-Solís, Jacob
author Gómez Díaz, Elena
author_facet Gómez Díaz, Elena
González-Solís, Jacob
author_role author
author2 González-Solís, Jacob
author2_role author
dc.subject.none.fl_str_mv Ocells marins
Genètica de poblacions
Morfologia animal
Marcadors bioquímics
Sea birds
Population Genetics
Animal morphology
Biochemical markers
topic Ocells marins
Genètica de poblacions
Morfologia animal
Marcadors bioquímics
Sea birds
Population Genetics
Animal morphology
Biochemical markers
description Longline fisheries, oil spills, and offshore wind farms are some of the major threats increasing seabird mortality at sea, but the impact of these threats on specific populations has been difficult to determine so far. We tested the use of molecular markers, morphometric measures, and stable isotope (δ15N and δ13C) and trace element concentrations in the first primary feather (grown at the end of the breeding period) to assign the geographic origin of Calonectris shearwaters. Overall, we sampled birds from three taxa: 13 Mediterranean Cory's Shearwater (Calonectris diomedea diomedea) breeding sites, 10 Atlantic Cory's Shearwater (Calonectris diomedea borealis) breeding sites, and one Cape Verde Shearwater (C. edwardsii) breeding site. Assignment rates were investigated at three spatial scales: breeding colony, breeding archipelago, and taxa levels. Genetic analyses based on the mitochondrial control region (198 birds from 21 breeding colonies) correctly assigned 100% of birds to the three main taxa but failed in detecting geographic structuring at lower scales. Discriminant analyses based on trace elements composition achieved the best rate of correct assignment to colony (77.5%). Body measurements or stable isotopes mainly succeeded in assigning individuals among taxa (87.9% and 89.9%, respectively) but failed at the colony level (27.1% and 38.0%, respectively). Combining all three approaches (morphometrics, isotopes, and trace elements on 186 birds from 15 breeding colonies) substantially improved correct classifications (86.0%, 90.7%, and 100% among colonies, archipelagos, and taxa, respectively). Validations using two independent data sets and jackknife cross-validation confirmed the robustness of the combined approach in the colony assignment (62.5%, 58.8%, and 69.8% for each validation test, respectively). A preliminary application of the discriminant model based on stable isotope δ15N and δ13C values and trace elements (219 birds from 17 breeding sites) showed that 41 Cory's Shearwaters caught by western Mediterranean long-liners came mainly from breeding colonies in Menorca (48.8%), Ibiza (14.6%), and Crete (31.7%). Our findings show that combining analyses of trace elements and stable isotopes on feathers can achieve high rates of correct geographic assignment of birds in the marine environment, opening new prospects for the study of seabird mortality at sea.
publishDate 2007
dc.date.none.fl_str_mv 2007
2015
2015
2015
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/2445/61364
url https://hdl.handle.net/2445/61364
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/10.1890/06-1232.1
Ecological Applications, 2007, vol. 17, num. 5, p. 1484-1498
http://dx.doi.org/10.1890/06-1232.1
dc.rights.none.fl_str_mv (c) Ecological Society of America, 2007
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Ecological Society of America, 2007
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 15 p.
application/pdf
dc.publisher.none.fl_str_mv Ecological Society of America
publisher.none.fl_str_mv Ecological Society of America
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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