The gateway to Africa: what determines sea crossing performance of a migratory soaring bird at the strait of Gibraltar?

Detalhes bibliográficos
Autor(a) principal: Santos, Carlos David
Data de Publicação: 2020
Outros Autores: Silva, João Paulo, Munõz, Antonio-Román, Onrubia, Alejandro, Wikelski, Martin
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/20290
Resumo: Research Article
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spelling The gateway to Africa: what determines sea crossing performance of a migratory soaring bird at the strait of Gibraltar?animal trackingbird migrationcrosswindecological barrierspowered flightsea crossingsoaring flightthermal updraftsResearch Article1. Large bodies of water represent major obstacles for the migration of soaring birds because thermal updrafts are absent or weak over water. Soaring birds are known to time their water crossings with favourable weather conditions and there are records of birds falling into the water and drowning in large numbers. However, it is still unclear how environmental factors, individual traits and trajectory choices affect their water crossing performance, this being important to understand the fitness consequences of water barriers for this group of birds. 2. We addressed this problem using the black kite Milvus migrans as model species at a major migration bottleneck, the Strait of Gibraltar. 3. We recorded high-resolution GPS and triaxial accelerometer data for 73 birds while crossing the Strait of Gibraltar, allowing the determination of sea crossing duration, length, altitude, speed and tortuosity, the flapping behaviour of birds and their failed crossing attempts. These parameters were modelled against wind speed and direction, time of the day, solar irradiance (proxy of thermal uplift), starting altitude and distance to Morocco, and age and sex of birds. 4. We found that sea crossing performance of black kites is driven by their age, the wind conditions, the starting altitude and distance to Morocco. Young birds made longer sea crossings and reached lower altitude above the sea than adults. Crosswinds promoted longer sea crossings, with birds reaching lower altitudes and with higher flapping effort. Birds starting at lower altitudes were more likely to quit or made higher flapping effort to complete the crossing. The location where birds started the sea crossings impacted crossing distance and duration. 5. We present evidence that explains why migrating soaring birds accumulate at sea passages during adverse weather conditions. Strong crosswinds during sea crossings force birds to extended flap-powered flight at low altitude, which may increase their chances of falling in the water. We also showed that juvenile birds assume more risks than adults. Finally, the way in which birds start the sea crossing is crucial for their success, particularly the starting altitude, which dictates how far birds can reach with reduced flapping effortJohn Wiley and SonsRepositório da Universidade de LisboaSantos, Carlos DavidSilva, João PauloMunõz, Antonio-RománOnrubia, AlejandroWikelski, Martin2020-09-15T08:47:13Z20202020-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/20290engJ Anim Ecol. 2020;89:1317–132810.1111/1365-2656.13201info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:49:44Zoai:www.repository.utl.pt:10400.5/20290Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:05:04.069239Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv The gateway to Africa: what determines sea crossing performance of a migratory soaring bird at the strait of Gibraltar?
title The gateway to Africa: what determines sea crossing performance of a migratory soaring bird at the strait of Gibraltar?
spellingShingle The gateway to Africa: what determines sea crossing performance of a migratory soaring bird at the strait of Gibraltar?
Santos, Carlos David
animal tracking
bird migration
crosswind
ecological barriers
powered flight
sea crossing
soaring flight
thermal updrafts
title_short The gateway to Africa: what determines sea crossing performance of a migratory soaring bird at the strait of Gibraltar?
title_full The gateway to Africa: what determines sea crossing performance of a migratory soaring bird at the strait of Gibraltar?
title_fullStr The gateway to Africa: what determines sea crossing performance of a migratory soaring bird at the strait of Gibraltar?
title_full_unstemmed The gateway to Africa: what determines sea crossing performance of a migratory soaring bird at the strait of Gibraltar?
title_sort The gateway to Africa: what determines sea crossing performance of a migratory soaring bird at the strait of Gibraltar?
author Santos, Carlos David
author_facet Santos, Carlos David
Silva, João Paulo
Munõz, Antonio-Román
Onrubia, Alejandro
Wikelski, Martin
author_role author
author2 Silva, João Paulo
Munõz, Antonio-Román
Onrubia, Alejandro
Wikelski, Martin
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Santos, Carlos David
Silva, João Paulo
Munõz, Antonio-Román
Onrubia, Alejandro
Wikelski, Martin
dc.subject.por.fl_str_mv animal tracking
bird migration
crosswind
ecological barriers
powered flight
sea crossing
soaring flight
thermal updrafts
topic animal tracking
bird migration
crosswind
ecological barriers
powered flight
sea crossing
soaring flight
thermal updrafts
description Research Article
publishDate 2020
dc.date.none.fl_str_mv 2020-09-15T08:47:13Z
2020
2020-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/20290
url http://hdl.handle.net/10400.5/20290
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv J Anim Ecol. 2020;89:1317–1328
10.1111/1365-2656.13201
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv John Wiley and Sons
publisher.none.fl_str_mv John Wiley and Sons
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799131143153385472

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