Migratory and resident Blackcaps Sylvia atricapilla wintering in southern Spain show no resource partitioning

When different populations of the same bird species share non-breeding habitats, competition for food may promote resource partitioning. We studied food choice by resident and migratory Blackcaps Sylvia atricapilla in sympatric wintering grounds in southern Spain. Resident Blackcaps may know the dis...

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Detalles Bibliográficos
Autores: Tellería Jorge, José Luis, Blázquez Santos, María Ángeles, Hera Fernández, Iván de la, Pérez Tris, Javier
Tipo de recurso: artículo
Fecha de publicación:2013
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/34521
Acceso en línea:https://hdl.handle.net/20.500.14352/34521
Access Level:acceso abierto
Palabra clave:598.2:591.91
Body condition
Food selection
Foraging ecology
Frugivory
migration
Morphology
Sympatry
Aves
Ecología (Biología)
Evolución
Zoología
2401.20 Ornitología
2401.06 Ecología animal
2401 Biología Animal (Zoología)
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oai_identifier_str oai:docta.ucm.es:20.500.14352/34521
network_acronym_str ES
network_name_str España
repository_id_str
spelling Migratory and resident Blackcaps Sylvia atricapilla wintering in southern Spain show no resource partitioningTellería Jorge, José LuisBlázquez Santos, María ÁngelesHera Fernández, Iván de laPérez Tris, Javier598.2:591.91Body conditionFood selectionForaging ecologyFrugivorymigrationMorphologySympatryAvesEcología (Biología)EvoluciónZoología2401.20 Ornitología2401.06 Ecología animal2401 Biología Animal (Zoología)When different populations of the same bird species share non-breeding habitats, competition for food may promote resource partitioning. We studied food choice by resident and migratory Blackcaps Sylvia atricapilla in sympatric wintering grounds in southern Spain. Resident Blackcaps may know the distribution of food better than migrants, and have a larger bill that may allow them to feed on a broader range of fruit sizes. Based on fruit and bird counts, we transformed both fruit crop and bird abundance to a common energy currency. During two winters with low and high fruit production, available energy from fruit in mid-January was estimated to be 80 and 1300 times the daily requirements of Blackcaps, respectively. Furthermore, Blackcap numbers did not track between-winter changes in fruit abundance during ten consecutive years of monitoring, further suggesting that fruit food is not limiting. Analysis of food items from 760 samples of 717 individuals showed that migrants and residents fed primarily on fruits of Wild Olive Olea europaea sylvestris, the most energetic fruit resource. In addition, there was no evidence that the larger bills of resident Blackcaps provided any foraging benefit. Migratory Blackcaps fed on Wild Olives and invertebrates, two resources with high energetic and structural value, more frequently than residents. This food choice could be more important for migratory Blackcaps because they have lower body mass to reduce wing load. Our results suggest that the wintering grounds of Blackcaps in Iberia provide abundant food, which is used by sympatric migrants and residents without resource partitioning. Slight differences in food choice suggest that migrants might benefit from feeding on more nutritive food than residents to counteract the energetic constraints associated with a smaller body size.WileyUniversidad Complutense de Madrid20132013-10-0120132013-10-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/34521reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttps://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/345212026-06-02T12:44:21Z
dc.title.none.fl_str_mv Migratory and resident Blackcaps Sylvia atricapilla wintering in southern Spain show no resource partitioning
title Migratory and resident Blackcaps Sylvia atricapilla wintering in southern Spain show no resource partitioning
spellingShingle Migratory and resident Blackcaps Sylvia atricapilla wintering in southern Spain show no resource partitioning
Tellería Jorge, José Luis
598.2:591.91
Body condition
Food selection
Foraging ecology
Frugivory
migration
Morphology
Sympatry
Aves
Ecología (Biología)
Evolución
Zoología
2401.20 Ornitología
2401.06 Ecología animal
2401 Biología Animal (Zoología)
title_short Migratory and resident Blackcaps Sylvia atricapilla wintering in southern Spain show no resource partitioning
title_full Migratory and resident Blackcaps Sylvia atricapilla wintering in southern Spain show no resource partitioning
title_fullStr Migratory and resident Blackcaps Sylvia atricapilla wintering in southern Spain show no resource partitioning
title_full_unstemmed Migratory and resident Blackcaps Sylvia atricapilla wintering in southern Spain show no resource partitioning
title_sort Migratory and resident Blackcaps Sylvia atricapilla wintering in southern Spain show no resource partitioning
dc.creator.none.fl_str_mv Tellería Jorge, José Luis
Blázquez Santos, María Ángeles
Hera Fernández, Iván de la
Pérez Tris, Javier
author Tellería Jorge, José Luis
author_facet Tellería Jorge, José Luis
Blázquez Santos, María Ángeles
Hera Fernández, Iván de la
Pérez Tris, Javier
author_role author
author2 Blázquez Santos, María Ángeles
Hera Fernández, Iván de la
Pérez Tris, Javier
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 598.2:591.91
Body condition
Food selection
Foraging ecology
Frugivory
migration
Morphology
Sympatry
Aves
Ecología (Biología)
Evolución
Zoología
2401.20 Ornitología
2401.06 Ecología animal
2401 Biología Animal (Zoología)
topic 598.2:591.91
Body condition
Food selection
Foraging ecology
Frugivory
migration
Morphology
Sympatry
Aves
Ecología (Biología)
Evolución
Zoología
2401.20 Ornitología
2401.06 Ecología animal
2401 Biología Animal (Zoología)
description When different populations of the same bird species share non-breeding habitats, competition for food may promote resource partitioning. We studied food choice by resident and migratory Blackcaps Sylvia atricapilla in sympatric wintering grounds in southern Spain. Resident Blackcaps may know the distribution of food better than migrants, and have a larger bill that may allow them to feed on a broader range of fruit sizes. Based on fruit and bird counts, we transformed both fruit crop and bird abundance to a common energy currency. During two winters with low and high fruit production, available energy from fruit in mid-January was estimated to be 80 and 1300 times the daily requirements of Blackcaps, respectively. Furthermore, Blackcap numbers did not track between-winter changes in fruit abundance during ten consecutive years of monitoring, further suggesting that fruit food is not limiting. Analysis of food items from 760 samples of 717 individuals showed that migrants and residents fed primarily on fruits of Wild Olive Olea europaea sylvestris, the most energetic fruit resource. In addition, there was no evidence that the larger bills of resident Blackcaps provided any foraging benefit. Migratory Blackcaps fed on Wild Olives and invertebrates, two resources with high energetic and structural value, more frequently than residents. This food choice could be more important for migratory Blackcaps because they have lower body mass to reduce wing load. Our results suggest that the wintering grounds of Blackcaps in Iberia provide abundant food, which is used by sympatric migrants and residents without resource partitioning. Slight differences in food choice suggest that migrants might benefit from feeding on more nutritive food than residents to counteract the energetic constraints associated with a smaller body size.
publishDate 2013
dc.date.none.fl_str_mv 2013
2013-10-01
2013
2013-10-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/34521
url https://hdl.handle.net/20.500.14352/34521
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
https://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
https://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300724

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