Can a 'wintering area effect' explain population status of Swainson's hawks? A stable isotope approach

Autores
Sarasola, José Hernán; Negro Balmaseda, Juan José; Hobson, Keith A.; Bortolotti, Gary R.; Bildstein, Keith
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
It has been suggested that declines in breeding populations of Swainson's hawks (Buteo swainsoni) in California, Oregon, and Nevada may be due to differential mortality of hawks on their wintering grounds. Although massive mortality incidents reported on the wintering grounds partially support this suggestion, there are no data showing differential use of wintering areas by breeding populations of Swainson's hawks. We used stable-hydrogen isotope analysis of feathers to determine whether large flocks of hawks wintering in Argentina consisted of a mixture of individuals from across the North American breeding range or consisted of individuals from discrete breeding populations. We found that flocks of wintering Swainson's hawks consisted of a mixture of individuals. The lack of connectivity between populations of breeding and wintering hawks suggests that high wintering mortality, either natural or human-induced, is unlikely to have direct consequences on a single breeding area in North America. The demographic effects of winter mortality should be 'diluted' across the entire breeding range of Swainson's hawks.
Fil: Sarasola, José Hernán. Consejo Superior de Investigaciones Científicas; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias de la Tierra y Ambientales de La Pampa. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Instituto de Ciencias de la Tierra y Ambientales de La Pampa; Argentina
Fil: Negro Balmaseda, Juan José. Consejo Superior de Investigaciones Científicas; España
Fil: Hobson, Keith A.. Environment Canada; Canadá
Fil: Bortolotti, Gary R.. University of Saskatchewan; Canadá
Fil: Bildstein, Keith. Hawk Mountain Sanctuary; Estados Unidos
Materia
Buteo Swainsoni
Conservation
Mortality
Neotropical Migrants
Stable Isotope Analysis
Swainson'S Hawk
Winter Spatial Segregation
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:11336/81745
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Can a 'wintering area effect' explain population status of Swainson's hawks? A stable isotope approachSarasola, José HernánNegro Balmaseda, Juan JoséHobson, Keith A.Bortolotti, Gary R.Bildstein, KeithButeo SwainsoniConservationMortalityNeotropical MigrantsStable Isotope AnalysisSwainson'S HawkWinter Spatial Segregationhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1It has been suggested that declines in breeding populations of Swainson's hawks (Buteo swainsoni) in California, Oregon, and Nevada may be due to differential mortality of hawks on their wintering grounds. Although massive mortality incidents reported on the wintering grounds partially support this suggestion, there are no data showing differential use of wintering areas by breeding populations of Swainson's hawks. We used stable-hydrogen isotope analysis of feathers to determine whether large flocks of hawks wintering in Argentina consisted of a mixture of individuals from across the North American breeding range or consisted of individuals from discrete breeding populations. We found that flocks of wintering Swainson's hawks consisted of a mixture of individuals. The lack of connectivity between populations of breeding and wintering hawks suggests that high wintering mortality, either natural or human-induced, is unlikely to have direct consequences on a single breeding area in North America. The demographic effects of winter mortality should be 'diluted' across the entire breeding range of Swainson's hawks.Fil: Sarasola, José Hernán. Consejo Superior de Investigaciones Científicas; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias de la Tierra y Ambientales de La Pampa. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Instituto de Ciencias de la Tierra y Ambientales de La Pampa; ArgentinaFil: Negro Balmaseda, Juan José. Consejo Superior de Investigaciones Científicas; EspañaFil: Hobson, Keith A.. Environment Canada; CanadáFil: Bortolotti, Gary R.. University of Saskatchewan; CanadáFil: Bildstein, Keith. Hawk Mountain Sanctuary; Estados UnidosWiley Blackwell Publishing, Inc2008-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/81745Sarasola, José Hernán; Negro Balmaseda, Juan José; Hobson, Keith A.; Bortolotti, Gary R.; Bildstein, Keith; Can a 'wintering area effect' explain population status of Swainson's hawks? A stable isotope approach; Wiley Blackwell Publishing, Inc; Diversity and Distributions; 14; 4; 7-2008; 686-6911366-9516CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/full/10.1111/j.1472-4642.2008.00475.xinfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1472-4642.2008.00475.xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:42:36Zoai:ri.conicet.gov.ar:11336/81745instacron: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:34982025-10-15 15:42:36.77CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Can a 'wintering area effect' explain population status of Swainson's hawks? A stable isotope approach
title Can a 'wintering area effect' explain population status of Swainson's hawks? A stable isotope approach
spellingShingle Can a 'wintering area effect' explain population status of Swainson's hawks? A stable isotope approach
Sarasola, José Hernán
Buteo Swainsoni
Conservation
Mortality
Neotropical Migrants
Stable Isotope Analysis
Swainson'S Hawk
Winter Spatial Segregation
title_short Can a 'wintering area effect' explain population status of Swainson's hawks? A stable isotope approach
title_full Can a 'wintering area effect' explain population status of Swainson's hawks? A stable isotope approach
title_fullStr Can a 'wintering area effect' explain population status of Swainson's hawks? A stable isotope approach
title_full_unstemmed Can a 'wintering area effect' explain population status of Swainson's hawks? A stable isotope approach
title_sort Can a 'wintering area effect' explain population status of Swainson's hawks? A stable isotope approach
dc.creator.none.fl_str_mv Sarasola, José Hernán
Negro Balmaseda, Juan José
Hobson, Keith A.
Bortolotti, Gary R.
Bildstein, Keith
author Sarasola, José Hernán
author_facet Sarasola, José Hernán
Negro Balmaseda, Juan José
Hobson, Keith A.
Bortolotti, Gary R.
Bildstein, Keith
author_role author
author2 Negro Balmaseda, Juan José
Hobson, Keith A.
Bortolotti, Gary R.
Bildstein, Keith
author2_role author
author
author
author
dc.subject.none.fl_str_mv Buteo Swainsoni
Conservation
Mortality
Neotropical Migrants
Stable Isotope Analysis
Swainson'S Hawk
Winter Spatial Segregation
topic Buteo Swainsoni
Conservation
Mortality
Neotropical Migrants
Stable Isotope Analysis
Swainson'S Hawk
Winter Spatial Segregation
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv It has been suggested that declines in breeding populations of Swainson's hawks (Buteo swainsoni) in California, Oregon, and Nevada may be due to differential mortality of hawks on their wintering grounds. Although massive mortality incidents reported on the wintering grounds partially support this suggestion, there are no data showing differential use of wintering areas by breeding populations of Swainson's hawks. We used stable-hydrogen isotope analysis of feathers to determine whether large flocks of hawks wintering in Argentina consisted of a mixture of individuals from across the North American breeding range or consisted of individuals from discrete breeding populations. We found that flocks of wintering Swainson's hawks consisted of a mixture of individuals. The lack of connectivity between populations of breeding and wintering hawks suggests that high wintering mortality, either natural or human-induced, is unlikely to have direct consequences on a single breeding area in North America. The demographic effects of winter mortality should be 'diluted' across the entire breeding range of Swainson's hawks.
Fil: Sarasola, José Hernán. Consejo Superior de Investigaciones Científicas; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias de la Tierra y Ambientales de La Pampa. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Instituto de Ciencias de la Tierra y Ambientales de La Pampa; Argentina
Fil: Negro Balmaseda, Juan José. Consejo Superior de Investigaciones Científicas; España
Fil: Hobson, Keith A.. Environment Canada; Canadá
Fil: Bortolotti, Gary R.. University of Saskatchewan; Canadá
Fil: Bildstein, Keith. Hawk Mountain Sanctuary; Estados Unidos
description It has been suggested that declines in breeding populations of Swainson's hawks (Buteo swainsoni) in California, Oregon, and Nevada may be due to differential mortality of hawks on their wintering grounds. Although massive mortality incidents reported on the wintering grounds partially support this suggestion, there are no data showing differential use of wintering areas by breeding populations of Swainson's hawks. We used stable-hydrogen isotope analysis of feathers to determine whether large flocks of hawks wintering in Argentina consisted of a mixture of individuals from across the North American breeding range or consisted of individuals from discrete breeding populations. We found that flocks of wintering Swainson's hawks consisted of a mixture of individuals. The lack of connectivity between populations of breeding and wintering hawks suggests that high wintering mortality, either natural or human-induced, is unlikely to have direct consequences on a single breeding area in North America. The demographic effects of winter mortality should be 'diluted' across the entire breeding range of Swainson's hawks.
publishDate 2008
dc.date.none.fl_str_mv 2008-07
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/11336/81745
Sarasola, José Hernán; Negro Balmaseda, Juan José; Hobson, Keith A.; Bortolotti, Gary R.; Bildstein, Keith; Can a 'wintering area effect' explain population status of Swainson's hawks? A stable isotope approach; Wiley Blackwell Publishing, Inc; Diversity and Distributions; 14; 4; 7-2008; 686-691
1366-9516
CONICET Digital
CONICET
url http://hdl.handle.net/11336/81745
identifier_str_mv Sarasola, José Hernán; Negro Balmaseda, Juan José; Hobson, Keith A.; Bortolotti, Gary R.; Bildstein, Keith; Can a 'wintering area effect' explain population status of Swainson's hawks? A stable isotope approach; Wiley Blackwell Publishing, Inc; Diversity and Distributions; 14; 4; 7-2008; 686-691
1366-9516
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/full/10.1111/j.1472-4642.2008.00475.x
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1472-4642.2008.00475.x
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
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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
_version_ 1846083534062616576
score 13.22299

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