Breeding latitude predicts timing but not rate of spring migration in a widespread migratory bird in South America

Autores
Jahn, Alex E.; Cereghetti, Joaquín; Cueto, Víctor R.; Hallworth, Michael T.; Levey, Douglas J.; Marini, Miguel Â; Masson, Diego Aníbal; Pizo, Marco A; Sarasola, José Hernán; Tuero, Diego T.
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
1. Identifying the processes that determine avian migratory strategies in different environmental contexts is imperative to understanding the constraints to survival and reproduction faced by migratory birds across the planet. 2. We compared the spring migration strategies of Fork‐tailed Flycatchers (Tyrannus s. savana) that breed at south‐temperate latitudes (i.e., austral migrants) vs. tropi‐ cal latitudes (i.e., intratropical migrants) in South America. We hypothesized that austral migrant flycatchers are more time‐selected than intratropical migrants during spring migration. As such, we predicted that austral migrants, which mi‐ grate further than intratropical migrants, will migrate at a faster rate and that the rate of migration for austral migrants will be positively correlated with the onset of spring migration. 3. We attached light‐level geolocators to Fork‐tailed Flycatchers at two tropical breeding sites in Brazil and at two south‐temperate breeding sites in Argentina and tracked their movements until the following breeding season. 4. Of 286 geolocators that were deployed, 37 were recovered ~1 year later, of which 28 provided useable data. Rate of spring migration did not differ significantly between the two groups, and only at one site was there a significantly positive relationship between date of initiation of spring migration and arrival date. 5. This represents the first comparison of individual migratory strategies among con‐ specific passerines breeding at tropical vs. temperate latitudes and suggests that austral migrant Fork‐tailed Flycatchers in South America are not more time‐se‐ lected on spring migration than intratropical migrant conspecifics. Low sample sizes could have diminished our power to detect differences (e.g., between sexes), such that further research into the mechanisms underpinning migratory strategies in this poorly understood system is necessary.
Facultad de Ciencias Naturales y Museo
Materia
Zoología
Argentina
Brazil
Cerrado
Life history
Light‐level geolocator
Pampas
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/107626

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network_name_str SEDICI (UNLP)
spelling Breeding latitude predicts timing but not rate of spring migration in a widespread migratory bird in South AmericaJahn, Alex E.Cereghetti, JoaquínCueto, Víctor R.Hallworth, Michael T.Levey, Douglas J.Marini, Miguel ÂMasson, Diego AníbalPizo, Marco ASarasola, José HernánTuero, Diego T.ZoologíaArgentinaBrazilCerradoLife historyLight‐level geolocatorPampas1. Identifying the processes that determine avian migratory strategies in different environmental contexts is imperative to understanding the constraints to survival and reproduction faced by migratory birds across the planet. 2. We compared the spring migration strategies of Fork‐tailed Flycatchers (Tyrannus s. savana) that breed at south‐temperate latitudes (i.e., austral migrants) vs. tropi‐ cal latitudes (i.e., intratropical migrants) in South America. We hypothesized that austral migrant flycatchers are more time‐selected than intratropical migrants during spring migration. As such, we predicted that austral migrants, which mi‐ grate further than intratropical migrants, will migrate at a faster rate and that the rate of migration for austral migrants will be positively correlated with the onset of spring migration. 3. We attached light‐level geolocators to Fork‐tailed Flycatchers at two tropical breeding sites in Brazil and at two south‐temperate breeding sites in Argentina and tracked their movements until the following breeding season. 4. Of 286 geolocators that were deployed, 37 were recovered ~1 year later, of which 28 provided useable data. Rate of spring migration did not differ significantly between the two groups, and only at one site was there a significantly positive relationship between date of initiation of spring migration and arrival date. 5. This represents the first comparison of individual migratory strategies among con‐ specific passerines breeding at tropical vs. temperate latitudes and suggests that austral migrant Fork‐tailed Flycatchers in South America are not more time‐se‐ lected on spring migration than intratropical migrant conspecifics. Low sample sizes could have diminished our power to detect differences (e.g., between sexes), such that further research into the mechanisms underpinning migratory strategies in this poorly understood system is necessary.Facultad de Ciencias Naturales y Museo2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/107626enginfo:eu-repo/semantics/altIdentifier/url/http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC6540664&blobtype=pdfinfo:eu-repo/semantics/altIdentifier/issn/2045-7758info:eu-repo/semantics/altIdentifier/pmid/31160996info:eu-repo/semantics/altIdentifier/doi/10.1002/ece3.5159info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:23:52Zoai:sedici.unlp.edu.ar:10915/107626Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:23:53.019SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Breeding latitude predicts timing but not rate of spring migration in a widespread migratory bird in South America
title Breeding latitude predicts timing but not rate of spring migration in a widespread migratory bird in South America
spellingShingle Breeding latitude predicts timing but not rate of spring migration in a widespread migratory bird in South America
Jahn, Alex E.
Zoología
Argentina
Brazil
Cerrado
Life history
Light‐level geolocator
Pampas
title_short Breeding latitude predicts timing but not rate of spring migration in a widespread migratory bird in South America
title_full Breeding latitude predicts timing but not rate of spring migration in a widespread migratory bird in South America
title_fullStr Breeding latitude predicts timing but not rate of spring migration in a widespread migratory bird in South America
title_full_unstemmed Breeding latitude predicts timing but not rate of spring migration in a widespread migratory bird in South America
title_sort Breeding latitude predicts timing but not rate of spring migration in a widespread migratory bird in South America
dc.creator.none.fl_str_mv Jahn, Alex E.
Cereghetti, Joaquín
Cueto, Víctor R.
Hallworth, Michael T.
Levey, Douglas J.
Marini, Miguel Â
Masson, Diego Aníbal
Pizo, Marco A
Sarasola, José Hernán
Tuero, Diego T.
author Jahn, Alex E.
author_facet Jahn, Alex E.
Cereghetti, Joaquín
Cueto, Víctor R.
Hallworth, Michael T.
Levey, Douglas J.
Marini, Miguel Â
Masson, Diego Aníbal
Pizo, Marco A
Sarasola, José Hernán
Tuero, Diego T.
author_role author
author2 Cereghetti, Joaquín
Cueto, Víctor R.
Hallworth, Michael T.
Levey, Douglas J.
Marini, Miguel Â
Masson, Diego Aníbal
Pizo, Marco A
Sarasola, José Hernán
Tuero, Diego T.
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Zoología
Argentina
Brazil
Cerrado
Life history
Light‐level geolocator
Pampas
topic Zoología
Argentina
Brazil
Cerrado
Life history
Light‐level geolocator
Pampas
dc.description.none.fl_txt_mv 1. Identifying the processes that determine avian migratory strategies in different environmental contexts is imperative to understanding the constraints to survival and reproduction faced by migratory birds across the planet. 2. We compared the spring migration strategies of Fork‐tailed Flycatchers (Tyrannus s. savana) that breed at south‐temperate latitudes (i.e., austral migrants) vs. tropi‐ cal latitudes (i.e., intratropical migrants) in South America. We hypothesized that austral migrant flycatchers are more time‐selected than intratropical migrants during spring migration. As such, we predicted that austral migrants, which mi‐ grate further than intratropical migrants, will migrate at a faster rate and that the rate of migration for austral migrants will be positively correlated with the onset of spring migration. 3. We attached light‐level geolocators to Fork‐tailed Flycatchers at two tropical breeding sites in Brazil and at two south‐temperate breeding sites in Argentina and tracked their movements until the following breeding season. 4. Of 286 geolocators that were deployed, 37 were recovered ~1 year later, of which 28 provided useable data. Rate of spring migration did not differ significantly between the two groups, and only at one site was there a significantly positive relationship between date of initiation of spring migration and arrival date. 5. This represents the first comparison of individual migratory strategies among con‐ specific passerines breeding at tropical vs. temperate latitudes and suggests that austral migrant Fork‐tailed Flycatchers in South America are not more time‐se‐ lected on spring migration than intratropical migrant conspecifics. Low sample sizes could have diminished our power to detect differences (e.g., between sexes), such that further research into the mechanisms underpinning migratory strategies in this poorly understood system is necessary.
Facultad de Ciencias Naturales y Museo
description 1. Identifying the processes that determine avian migratory strategies in different environmental contexts is imperative to understanding the constraints to survival and reproduction faced by migratory birds across the planet. 2. We compared the spring migration strategies of Fork‐tailed Flycatchers (Tyrannus s. savana) that breed at south‐temperate latitudes (i.e., austral migrants) vs. tropi‐ cal latitudes (i.e., intratropical migrants) in South America. We hypothesized that austral migrant flycatchers are more time‐selected than intratropical migrants during spring migration. As such, we predicted that austral migrants, which mi‐ grate further than intratropical migrants, will migrate at a faster rate and that the rate of migration for austral migrants will be positively correlated with the onset of spring migration. 3. We attached light‐level geolocators to Fork‐tailed Flycatchers at two tropical breeding sites in Brazil and at two south‐temperate breeding sites in Argentina and tracked their movements until the following breeding season. 4. Of 286 geolocators that were deployed, 37 were recovered ~1 year later, of which 28 provided useable data. Rate of spring migration did not differ significantly between the two groups, and only at one site was there a significantly positive relationship between date of initiation of spring migration and arrival date. 5. This represents the first comparison of individual migratory strategies among con‐ specific passerines breeding at tropical vs. temperate latitudes and suggests that austral migrant Fork‐tailed Flycatchers in South America are not more time‐se‐ lected on spring migration than intratropical migrant conspecifics. Low sample sizes could have diminished our power to detect differences (e.g., between sexes), such that further research into the mechanisms underpinning migratory strategies in this poorly understood system is necessary.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
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dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/107626
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info:eu-repo/semantics/altIdentifier/issn/2045-7758
info:eu-repo/semantics/altIdentifier/pmid/31160996
info:eu-repo/semantics/altIdentifier/doi/10.1002/ece3.5159
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
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Creative Commons Attribution 4.0 International (CC BY 4.0)
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collection SEDICI (UNLP)
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
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