Carryover effects of long-distance avian migration are weaker than effects of breeding environment in a partially migratory bird

Abstract Migration may expose individuals to a wide range of increasing anthropogenic threats. In addition to direct mortality effects, this exposure may influence post-migratory reproductive fitness. Partial migration—where a population comprises migrants and residents—represents a powerful opportu...

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Autores principales:	Claire Buchan, James J. Gilroy, Inês Catry, Javier Bustamante, Alina D. Marca, Philip W. Atkinson, Juan Miguel González, Aldina M. A. Franco
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c2dd69a7ba2f48a698ce0c87a51d1757
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spelling	oai:doaj.org-article:c2dd69a7ba2f48a698ce0c87a51d17572021-12-02T14:12:10ZCarryover effects of long-distance avian migration are weaker than effects of breeding environment in a partially migratory bird10.1038/s41598-020-80341-x2045-2322https://doaj.org/article/c2dd69a7ba2f48a698ce0c87a51d17572021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80341-xhttps://doaj.org/toc/2045-2322Abstract Migration may expose individuals to a wide range of increasing anthropogenic threats. In addition to direct mortality effects, this exposure may influence post-migratory reproductive fitness. Partial migration—where a population comprises migrants and residents—represents a powerful opportunity to explore carryover effects of migration. Studies of partial migration in birds typically examine short-distance systems; here we studied an unusual system where residents breed in mixed colonies alongside long-distance trans-Saharan migrants (lesser kestrels (Falco naumanni) in Spain). Combining geolocator data, stable isotope analysis and resighting data, we examined the effects of this stark difference in migratory strategy on body condition, breeding phenology and breeding success. We monitored four colonies in two regions of southern Spain for five consecutive years (2014–2018), yielding 1962 captures, determining migratory strategy for 141 adult bird-years. Despite a 3000-km difference in distance travelled, we find no effect of strategy on breeding parameters. We find weak evidence for a short-term negative carryover effect of migration on body condition, but this was only apparent in the breeding region with lower primary productivity. Our results indicate that carryover effects of even highly divergent migratory strategies may be minimal relative to effects of conditions experienced on breeding grounds.Claire BuchanJames J. GilroyInês CatryJavier BustamanteAlina D. MarcaPhilip W. AtkinsonJuan Miguel GonzálezAldina M. A. FrancoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Claire Buchan James J. Gilroy Inês Catry Javier Bustamante Alina D. Marca Philip W. Atkinson Juan Miguel González Aldina M. A. Franco Carryover effects of long-distance avian migration are weaker than effects of breeding environment in a partially migratory bird
description	Abstract Migration may expose individuals to a wide range of increasing anthropogenic threats. In addition to direct mortality effects, this exposure may influence post-migratory reproductive fitness. Partial migration—where a population comprises migrants and residents—represents a powerful opportunity to explore carryover effects of migration. Studies of partial migration in birds typically examine short-distance systems; here we studied an unusual system where residents breed in mixed colonies alongside long-distance trans-Saharan migrants (lesser kestrels (Falco naumanni) in Spain). Combining geolocator data, stable isotope analysis and resighting data, we examined the effects of this stark difference in migratory strategy on body condition, breeding phenology and breeding success. We monitored four colonies in two regions of southern Spain for five consecutive years (2014–2018), yielding 1962 captures, determining migratory strategy for 141 adult bird-years. Despite a 3000-km difference in distance travelled, we find no effect of strategy on breeding parameters. We find weak evidence for a short-term negative carryover effect of migration on body condition, but this was only apparent in the breeding region with lower primary productivity. Our results indicate that carryover effects of even highly divergent migratory strategies may be minimal relative to effects of conditions experienced on breeding grounds.
format	article
author	Claire Buchan James J. Gilroy Inês Catry Javier Bustamante Alina D. Marca Philip W. Atkinson Juan Miguel González Aldina M. A. Franco
author_facet	Claire Buchan James J. Gilroy Inês Catry Javier Bustamante Alina D. Marca Philip W. Atkinson Juan Miguel González Aldina M. A. Franco
author_sort	Claire Buchan
title	Carryover effects of long-distance avian migration are weaker than effects of breeding environment in a partially migratory bird
title_short	Carryover effects of long-distance avian migration are weaker than effects of breeding environment in a partially migratory bird
title_full	Carryover effects of long-distance avian migration are weaker than effects of breeding environment in a partially migratory bird
title_fullStr	Carryover effects of long-distance avian migration are weaker than effects of breeding environment in a partially migratory bird
title_full_unstemmed	Carryover effects of long-distance avian migration are weaker than effects of breeding environment in a partially migratory bird
title_sort	carryover effects of long-distance avian migration are weaker than effects of breeding environment in a partially migratory bird
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c2dd69a7ba2f48a698ce0c87a51d1757
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Carryover effects of long-distance avian migration are weaker than effects of breeding environment in a partially migratory bird

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