Stressful conditions experienced by endangered Egyptian vultures on African wintering areas

Autores
Carrete, M.; Bortolotti, G. R.; Sánchez Zapata, J. A.; Delgado, A.; Cortés Avizanda, A.; Grande, Juan Manuel; Donázar, J. A.
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Among European breeding birds, those wintering in the Sahel region have undergone a sustained and severe decline. Long-term data show that variation in primary production of the Sahelian staging area significantly affects survival of many species, a relationship probably mediated by trophic resource availability. However, the physiological, hormonal and behavioural responses underlying this relationship remain unexplored. We present a potential explanation for the importance of prevailing conditions during winter to understand the population ecology and current trends of migratory species. We measured corticosterone levels in feathers of Egyptian vultures Neophron percnopterus grown in Africa and Europe, showing how conditions faced by birds during wintering periods result in the release of more corticosterone over time than when those individuals were on their summering grounds. This pattern was concordant with home-range size differences (c. 33 times larger in Africa than in Europe). We suggest that as wintering habitat of Egyptian vultures in the Sahel region has degraded during recent times, food availability has also been reduced. An increase in corticosterone during winter with a consequent increase in locomotor activity, for example, food searching behaviour, may normally be adaptive. However, enlarging home ranges could be futile if conditions are not better in the dispersal area, and costs of the higher corticosterone level, including energy expenditure from enhanced activity, may pose a significant trade-off. These physiological responses may be characteristic of other European trans-Saharan migrant birds that have undergone significant population declines.
Fil: Carrete, M.. Universidad Pablo de Olavide; España
Fil: Bortolotti, G. R.. University of Saskatchewan; Canadá
Fil: Sánchez Zapata, J. A.. Universidad de Miguel Hernández; España
Fil: Delgado, A.. Instituto Andaluz de Ciencias de la Tierra; España
Fil: Cortés Avizanda, A.. Consejo Superior de Investigaciones Científicas; España
Fil: Grande, Juan Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Pampa. Facultad de Ciencia Exactas y Naturales. Departamento de Recursos Naturales. Centro para el Estudio y Conservación de Aves Rapaces; Argentina. University of Saskatchewan; Canadá
Fil: Donázar, J. A.. Consejo Superior de Investigaciones Científicas; España
Materia
Corticosterone
Sahel Region
Trans-Saharan Migratory Species
Winter Mortality
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:11336/81569
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Stressful conditions experienced by endangered Egyptian vultures on African wintering areasCarrete, M.Bortolotti, G. R.Sánchez Zapata, J. A.Delgado, A.Cortés Avizanda, A.Grande, Juan ManuelDonázar, J. A.CorticosteroneSahel RegionTrans-Saharan Migratory SpeciesWinter Mortalityhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Among European breeding birds, those wintering in the Sahel region have undergone a sustained and severe decline. Long-term data show that variation in primary production of the Sahelian staging area significantly affects survival of many species, a relationship probably mediated by trophic resource availability. However, the physiological, hormonal and behavioural responses underlying this relationship remain unexplored. We present a potential explanation for the importance of prevailing conditions during winter to understand the population ecology and current trends of migratory species. We measured corticosterone levels in feathers of Egyptian vultures Neophron percnopterus grown in Africa and Europe, showing how conditions faced by birds during wintering periods result in the release of more corticosterone over time than when those individuals were on their summering grounds. This pattern was concordant with home-range size differences (c. 33 times larger in Africa than in Europe). We suggest that as wintering habitat of Egyptian vultures in the Sahel region has degraded during recent times, food availability has also been reduced. An increase in corticosterone during winter with a consequent increase in locomotor activity, for example, food searching behaviour, may normally be adaptive. However, enlarging home ranges could be futile if conditions are not better in the dispersal area, and costs of the higher corticosterone level, including energy expenditure from enhanced activity, may pose a significant trade-off. These physiological responses may be characteristic of other European trans-Saharan migrant birds that have undergone significant population declines.Fil: Carrete, M.. Universidad Pablo de Olavide; EspañaFil: Bortolotti, G. R.. University of Saskatchewan; CanadáFil: Sánchez Zapata, J. A.. Universidad de Miguel Hernández; EspañaFil: Delgado, A.. Instituto Andaluz de Ciencias de la Tierra; EspañaFil: Cortés Avizanda, A.. Consejo Superior de Investigaciones Científicas; EspañaFil: Grande, Juan Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Pampa. Facultad de Ciencia Exactas y Naturales. Departamento de Recursos Naturales. Centro para el Estudio y Conservación de Aves Rapaces; Argentina. University of Saskatchewan; CanadáFil: Donázar, J. A.. Consejo Superior de Investigaciones Científicas; EspañaWiley Blackwell Publishing, Inc2013-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/81569Carrete, M.; Bortolotti, G. R.; Sánchez Zapata, J. A.; Delgado, A.; Cortés Avizanda, A.; et al.; Stressful conditions experienced by endangered Egyptian vultures on African wintering areas; Wiley Blackwell Publishing, Inc; Animal Conservation; 16; 3; 6-2013; 353-3581367-9430CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1111/acv.12001info:eu-repo/semantics/altIdentifier/url/https://zslpublications.onlinelibrary.wiley.com/doi/abs/10.1111/acv.12001info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:51:59Zoai:ri.conicet.gov.ar:11336/81569instacron: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 09:51:59.449CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Stressful conditions experienced by endangered Egyptian vultures on African wintering areas
title Stressful conditions experienced by endangered Egyptian vultures on African wintering areas
spellingShingle Stressful conditions experienced by endangered Egyptian vultures on African wintering areas
Carrete, M.
Corticosterone
Sahel Region
Trans-Saharan Migratory Species
Winter Mortality
title_short Stressful conditions experienced by endangered Egyptian vultures on African wintering areas
title_full Stressful conditions experienced by endangered Egyptian vultures on African wintering areas
title_fullStr Stressful conditions experienced by endangered Egyptian vultures on African wintering areas
title_full_unstemmed Stressful conditions experienced by endangered Egyptian vultures on African wintering areas
title_sort Stressful conditions experienced by endangered Egyptian vultures on African wintering areas
dc.creator.none.fl_str_mv Carrete, M.
Bortolotti, G. R.
Sánchez Zapata, J. A.
Delgado, A.
Cortés Avizanda, A.
Grande, Juan Manuel
Donázar, J. A.
author Carrete, M.
author_facet Carrete, M.
Bortolotti, G. R.
Sánchez Zapata, J. A.
Delgado, A.
Cortés Avizanda, A.
Grande, Juan Manuel
Donázar, J. A.
author_role author
author2 Bortolotti, G. R.
Sánchez Zapata, J. A.
Delgado, A.
Cortés Avizanda, A.
Grande, Juan Manuel
Donázar, J. A.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Corticosterone
Sahel Region
Trans-Saharan Migratory Species
Winter Mortality
topic Corticosterone
Sahel Region
Trans-Saharan Migratory Species
Winter Mortality
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Among European breeding birds, those wintering in the Sahel region have undergone a sustained and severe decline. Long-term data show that variation in primary production of the Sahelian staging area significantly affects survival of many species, a relationship probably mediated by trophic resource availability. However, the physiological, hormonal and behavioural responses underlying this relationship remain unexplored. We present a potential explanation for the importance of prevailing conditions during winter to understand the population ecology and current trends of migratory species. We measured corticosterone levels in feathers of Egyptian vultures Neophron percnopterus grown in Africa and Europe, showing how conditions faced by birds during wintering periods result in the release of more corticosterone over time than when those individuals were on their summering grounds. This pattern was concordant with home-range size differences (c. 33 times larger in Africa than in Europe). We suggest that as wintering habitat of Egyptian vultures in the Sahel region has degraded during recent times, food availability has also been reduced. An increase in corticosterone during winter with a consequent increase in locomotor activity, for example, food searching behaviour, may normally be adaptive. However, enlarging home ranges could be futile if conditions are not better in the dispersal area, and costs of the higher corticosterone level, including energy expenditure from enhanced activity, may pose a significant trade-off. These physiological responses may be characteristic of other European trans-Saharan migrant birds that have undergone significant population declines.
Fil: Carrete, M.. Universidad Pablo de Olavide; España
Fil: Bortolotti, G. R.. University of Saskatchewan; Canadá
Fil: Sánchez Zapata, J. A.. Universidad de Miguel Hernández; España
Fil: Delgado, A.. Instituto Andaluz de Ciencias de la Tierra; España
Fil: Cortés Avizanda, A.. Consejo Superior de Investigaciones Científicas; España
Fil: Grande, Juan Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Pampa. Facultad de Ciencia Exactas y Naturales. Departamento de Recursos Naturales. Centro para el Estudio y Conservación de Aves Rapaces; Argentina. University of Saskatchewan; Canadá
Fil: Donázar, J. A.. Consejo Superior de Investigaciones Científicas; España
description Among European breeding birds, those wintering in the Sahel region have undergone a sustained and severe decline. Long-term data show that variation in primary production of the Sahelian staging area significantly affects survival of many species, a relationship probably mediated by trophic resource availability. However, the physiological, hormonal and behavioural responses underlying this relationship remain unexplored. We present a potential explanation for the importance of prevailing conditions during winter to understand the population ecology and current trends of migratory species. We measured corticosterone levels in feathers of Egyptian vultures Neophron percnopterus grown in Africa and Europe, showing how conditions faced by birds during wintering periods result in the release of more corticosterone over time than when those individuals were on their summering grounds. This pattern was concordant with home-range size differences (c. 33 times larger in Africa than in Europe). We suggest that as wintering habitat of Egyptian vultures in the Sahel region has degraded during recent times, food availability has also been reduced. An increase in corticosterone during winter with a consequent increase in locomotor activity, for example, food searching behaviour, may normally be adaptive. However, enlarging home ranges could be futile if conditions are not better in the dispersal area, and costs of the higher corticosterone level, including energy expenditure from enhanced activity, may pose a significant trade-off. These physiological responses may be characteristic of other European trans-Saharan migrant birds that have undergone significant population declines.
publishDate 2013
dc.date.none.fl_str_mv 2013-06
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/11336/81569
Carrete, M.; Bortolotti, G. R.; Sánchez Zapata, J. A.; Delgado, A.; Cortés Avizanda, A.; et al.; Stressful conditions experienced by endangered Egyptian vultures on African wintering areas; Wiley Blackwell Publishing, Inc; Animal Conservation; 16; 3; 6-2013; 353-358
1367-9430
CONICET Digital
CONICET
url http://hdl.handle.net/11336/81569
identifier_str_mv Carrete, M.; Bortolotti, G. R.; Sánchez Zapata, J. A.; Delgado, A.; Cortés Avizanda, A.; et al.; Stressful conditions experienced by endangered Egyptian vultures on African wintering areas; Wiley Blackwell Publishing, Inc; Animal Conservation; 16; 3; 6-2013; 353-358
1367-9430
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1111/acv.12001
info:eu-repo/semantics/altIdentifier/url/https://zslpublications.onlinelibrary.wiley.com/doi/abs/10.1111/acv.12001
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_ 1842269128602157056
score 13.13397

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