Drivers of clutch-size in Fork-tailed Flycatchers (Tyrannus savana) at temperate and tropical latitudes in South America
- Autores
- Jahn, Alex; Tuero, Diego Tomas; Mamani, Ana Maria; Bejarano, Vanesa; Masson, Diego Anibal; Aguilar, Eluney
- Año de publicación
- 2014
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Many species of birds exhibit a latitudinal gradient in annual reproductive investment, laying more eggs and producing more nestlings at higher latitudes. However, few studies have evaluated the mechanisms that underlie such patterns and such differences in grassland birds specifically. We monitored nests of Fork-tailed Flycatchers (Tyrannus savana) over two breeding seasons at a tropical site in Bolivia (in 2010-11 and 2011-12) and three breeding seasons at a southern temperate site in Argentina (2010-11, 2011-12 and 2012-13), testing two hypotheses explaining variation in clutch-size among populations: the food-limitation hypothesis and the nest-predation hypothesis. Mean clutch-size and mean brood-size were significantly larger at the temperate study site than at the tropical site. Availability of arthropod food per individual bird was significantly higher at the temperate site. There was no relationship, positive or negative, between rates of nest predation and either clutch- or brood-size, and thus no support for the nest-predation hypothesis. We conclude that food availability explains much of the latitudinal variation in clutch-size in this species. We discuss avenues for future research on the mechanisms underlying geographical variation in the life histories of Neotropical birds.
Fil: Jahn, Alex. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Tuero, Diego Tomas. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina
Fil: Mamani, Ana Maria. Museo de Historia Natural "Noel Kempff Mercado"; Bolivia
Fil: Bejarano, Vanesa. Museo de Historia Natural "Noel Kempff Mercado"; Bolivia
Fil: Masson, Diego Anibal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina
Fil: Aguilar, Eluney. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina - Materia
-
HISTORIA DE VIDA
TAMANO DE PUESTA
TYRANNUS SAVANA
TIJERETA - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/86054
Ver los metadatos del registro completo
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3498 |
network_name_str |
CONICET Digital (CONICET) |
spelling |
Drivers of clutch-size in Fork-tailed Flycatchers (Tyrannus savana) at temperate and tropical latitudes in South AmericaJahn, AlexTuero, Diego TomasMamani, Ana MariaBejarano, VanesaMasson, Diego AnibalAguilar, EluneyHISTORIA DE VIDATAMANO DE PUESTATYRANNUS SAVANATIJERETAhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Many species of birds exhibit a latitudinal gradient in annual reproductive investment, laying more eggs and producing more nestlings at higher latitudes. However, few studies have evaluated the mechanisms that underlie such patterns and such differences in grassland birds specifically. We monitored nests of Fork-tailed Flycatchers (Tyrannus savana) over two breeding seasons at a tropical site in Bolivia (in 2010-11 and 2011-12) and three breeding seasons at a southern temperate site in Argentina (2010-11, 2011-12 and 2012-13), testing two hypotheses explaining variation in clutch-size among populations: the food-limitation hypothesis and the nest-predation hypothesis. Mean clutch-size and mean brood-size were significantly larger at the temperate study site than at the tropical site. Availability of arthropod food per individual bird was significantly higher at the temperate site. There was no relationship, positive or negative, between rates of nest predation and either clutch- or brood-size, and thus no support for the nest-predation hypothesis. We conclude that food availability explains much of the latitudinal variation in clutch-size in this species. We discuss avenues for future research on the mechanisms underlying geographical variation in the life histories of Neotropical birds.Fil: Jahn, Alex. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Tuero, Diego Tomas. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; ArgentinaFil: Mamani, Ana Maria. Museo de Historia Natural "Noel Kempff Mercado"; BoliviaFil: Bejarano, Vanesa. Museo de Historia Natural "Noel Kempff Mercado"; BoliviaFil: Masson, Diego Anibal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; ArgentinaFil: Aguilar, Eluney. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaCsiro Publishing2014-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/86054Jahn, Alex; Tuero, Diego Tomas; Mamani, Ana Maria; Bejarano, Vanesa; Masson, Diego Anibal; et al.; Drivers of clutch-size in Fork-tailed Flycatchers (Tyrannus savana) at temperate and tropical latitudes in South America; Csiro Publishing; Emu; 114; 4; 9-2014; 337-3420158-4197CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/abs/10.1071/MU13084info:eu-repo/semantics/altIdentifier/doi/10.1071/MU13084info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:31:14Zoai:ri.conicet.gov.ar:11336/86054instacron: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:34982025-09-29 10:31:14.906CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Drivers of clutch-size in Fork-tailed Flycatchers (Tyrannus savana) at temperate and tropical latitudes in South America |
title |
Drivers of clutch-size in Fork-tailed Flycatchers (Tyrannus savana) at temperate and tropical latitudes in South America |
spellingShingle |
Drivers of clutch-size in Fork-tailed Flycatchers (Tyrannus savana) at temperate and tropical latitudes in South America Jahn, Alex HISTORIA DE VIDA TAMANO DE PUESTA TYRANNUS SAVANA TIJERETA |
title_short |
Drivers of clutch-size in Fork-tailed Flycatchers (Tyrannus savana) at temperate and tropical latitudes in South America |
title_full |
Drivers of clutch-size in Fork-tailed Flycatchers (Tyrannus savana) at temperate and tropical latitudes in South America |
title_fullStr |
Drivers of clutch-size in Fork-tailed Flycatchers (Tyrannus savana) at temperate and tropical latitudes in South America |
title_full_unstemmed |
Drivers of clutch-size in Fork-tailed Flycatchers (Tyrannus savana) at temperate and tropical latitudes in South America |
title_sort |
Drivers of clutch-size in Fork-tailed Flycatchers (Tyrannus savana) at temperate and tropical latitudes in South America |
dc.creator.none.fl_str_mv |
Jahn, Alex Tuero, Diego Tomas Mamani, Ana Maria Bejarano, Vanesa Masson, Diego Anibal Aguilar, Eluney |
author |
Jahn, Alex |
author_facet |
Jahn, Alex Tuero, Diego Tomas Mamani, Ana Maria Bejarano, Vanesa Masson, Diego Anibal Aguilar, Eluney |
author_role |
author |
author2 |
Tuero, Diego Tomas Mamani, Ana Maria Bejarano, Vanesa Masson, Diego Anibal Aguilar, Eluney |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
HISTORIA DE VIDA TAMANO DE PUESTA TYRANNUS SAVANA TIJERETA |
topic |
HISTORIA DE VIDA TAMANO DE PUESTA TYRANNUS SAVANA TIJERETA |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Many species of birds exhibit a latitudinal gradient in annual reproductive investment, laying more eggs and producing more nestlings at higher latitudes. However, few studies have evaluated the mechanisms that underlie such patterns and such differences in grassland birds specifically. We monitored nests of Fork-tailed Flycatchers (Tyrannus savana) over two breeding seasons at a tropical site in Bolivia (in 2010-11 and 2011-12) and three breeding seasons at a southern temperate site in Argentina (2010-11, 2011-12 and 2012-13), testing two hypotheses explaining variation in clutch-size among populations: the food-limitation hypothesis and the nest-predation hypothesis. Mean clutch-size and mean brood-size were significantly larger at the temperate study site than at the tropical site. Availability of arthropod food per individual bird was significantly higher at the temperate site. There was no relationship, positive or negative, between rates of nest predation and either clutch- or brood-size, and thus no support for the nest-predation hypothesis. We conclude that food availability explains much of the latitudinal variation in clutch-size in this species. We discuss avenues for future research on the mechanisms underlying geographical variation in the life histories of Neotropical birds. Fil: Jahn, Alex. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Tuero, Diego Tomas. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina Fil: Mamani, Ana Maria. Museo de Historia Natural "Noel Kempff Mercado"; Bolivia Fil: Bejarano, Vanesa. Museo de Historia Natural "Noel Kempff Mercado"; Bolivia Fil: Masson, Diego Anibal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina Fil: Aguilar, Eluney. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina |
description |
Many species of birds exhibit a latitudinal gradient in annual reproductive investment, laying more eggs and producing more nestlings at higher latitudes. However, few studies have evaluated the mechanisms that underlie such patterns and such differences in grassland birds specifically. We monitored nests of Fork-tailed Flycatchers (Tyrannus savana) over two breeding seasons at a tropical site in Bolivia (in 2010-11 and 2011-12) and three breeding seasons at a southern temperate site in Argentina (2010-11, 2011-12 and 2012-13), testing two hypotheses explaining variation in clutch-size among populations: the food-limitation hypothesis and the nest-predation hypothesis. Mean clutch-size and mean brood-size were significantly larger at the temperate study site than at the tropical site. Availability of arthropod food per individual bird was significantly higher at the temperate site. There was no relationship, positive or negative, between rates of nest predation and either clutch- or brood-size, and thus no support for the nest-predation hypothesis. We conclude that food availability explains much of the latitudinal variation in clutch-size in this species. We discuss avenues for future research on the mechanisms underlying geographical variation in the life histories of Neotropical birds. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-09 |
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/11336/86054 Jahn, Alex; Tuero, Diego Tomas; Mamani, Ana Maria; Bejarano, Vanesa; Masson, Diego Anibal; et al.; Drivers of clutch-size in Fork-tailed Flycatchers (Tyrannus savana) at temperate and tropical latitudes in South America; Csiro Publishing; Emu; 114; 4; 9-2014; 337-342 0158-4197 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/86054 |
identifier_str_mv |
Jahn, Alex; Tuero, Diego Tomas; Mamani, Ana Maria; Bejarano, Vanesa; Masson, Diego Anibal; et al.; Drivers of clutch-size in Fork-tailed Flycatchers (Tyrannus savana) at temperate and tropical latitudes in South America; Csiro Publishing; Emu; 114; 4; 9-2014; 337-342 0158-4197 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://www.tandfonline.com/doi/abs/10.1071/MU13084 info:eu-repo/semantics/altIdentifier/doi/10.1071/MU13084 |
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 application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Csiro Publishing |
publisher.none.fl_str_mv |
Csiro Publishing |
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 |
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1844614322261590016 |
score |
13.070432 |