Differential survival throughout the full annual cycle of a migratory bird presents a life-history trade-off.
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Differential survival throughout the full annual cycle of a migratory bird presents a life-history trade-off.

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Differential survival throughout the full annual cycle of a migratory bird presents a life-history trade-off.

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dc.contributor.author Buechley, E
dc.contributor.author Oppel, O
dc.contributor.author Efrat, R
dc.contributor.author Phipps, W.L
dc.contributor.author Carbonell, I
dc.contributor.author Álvarez, E
dc.contributor.author Andreotti, A
dc.contributor.author Arkumarev, V
dc.contributor.author Berger-Tal, O
dc.contributor.author Bermejo, A
dc.contributor.author Bounas, A
dc.contributor.author Ceccolini, G
dc.contributor.author Cenerini, A
dc.contributor.author Dobrev, V
dc.contributor.author Duriez, O
dc.contributor.author García, J
dc.contributor.author García-Ripollés, C
dc.contributor.author Galán, M
dc.contributor.author Gil, A
dc.contributor.author Giraud, L
dc.contributor.author Hatzofe, O
dc.contributor.author Iglesias, J.J
dc.contributor.author Karyakin, I
dc.contributor.author Kobierzycki, E
dc.contributor.author Kret, E
dc.contributor.author Loercher, F
dc.contributor.author López-López, P
dc.contributor.author Miller, Y
dc.contributor.author Mueller, T
dc.contributor.author Nikolov, S.C
dc.contributor.author De La Puente, J
dc.contributor.author Sapir, N
dc.contributor.author Saravia, V
dc.contributor.author Sekercioglu, C.H
dc.contributor.author Sillett, T.S
dc.contributor.author Tavares, J
dc.contributor.author Urios, V
dc.contributor.author Marra, P.P.
dc.date.accessioned 2022-02-09T12:06:23Z
dc.date.available 2022-02-09T12:06:23Z
dc.date.issued 2021
dc.identifier.uri https://hdl.handle.net/10550/81552
dc.description.abstract Long-distance migrations are among the most physically demanding feats animals perform. Understanding the potential costs and benefits of such behaviour is a fundamental question in ecology and evolution. A hypothetical cost of migration should be outweighed by higher productivity and/or higher annual survival, but few studies on migratory species have been able to directly quantify patterns of survival throughout the full annual cycle and across the majority of a species' range. Here, we use telemetry data from 220 migratory Egyptian vultures Neophron percnopterus, tracked for 3,186 bird months and across approximately 70% of the species' global distribution, to test for differences in survival throughout the annual cycle. We estimated monthly survival probability relative to migration and latitude using a multi-event capture-recapture model in a Bayesian framework that accounted for age, origin, subpopulation and the uncertainty of classifying fates from tracking data. We found lower survival during migration compared to stationary periods (β = −0.816; 95% credible interval: −1.290 to −0.318) and higher survival on non-breeding grounds at southern latitudes (<25°N; β = 0.664; 0.076-1.319) compared to on breeding grounds. Survival was also higher for individuals originating from Western Europe (β = 0.664; 0.110-1.330) as compared to further east in Europe and Asia, and improved with age (β = 0.030; 0.020-0.042). Anthropogenic mortalities accounted for half of the mortalities with a known cause and occurred mainly in northern latitudes. Many juveniles drowned in the Mediterranean Sea on their first autumn migration while there were few confirmed mortalities in the Sahara Desert, indicating that migration barriers are likely species-specific. Our study advances the understanding of important fitness trade-offs associated with long-distance migration. We conclude that there is lower survival associated with migration, but that this may be offset by higher non-breeding survival at lower latitudes. We found more human-caused mortality farther north, and suggest that increasing anthropogenic mortality could disrupt the delicate migration trade-off balance. Research to investigate further potential benefits of migration (e.g. differential productivity across latitudes) could clarify how migration evolved and how migrants may persist in a rapidly changing world.
dc.language.iso eng
dc.relation.ispartof Journal of Animal Ecology, 2021, vol. 90, num. 5, p. 1228-1238
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Buechley, E Oppel, O Efrat, R Phipps, W.L Carbonell, I Álvarez, E Andreotti, A Arkumarev, V Berger-Tal, O Bermejo, A Bounas, A Ceccolini, G Cenerini, A Dobrev, V Duriez, O García, J García-Ripollés, C Galán, M Gil, A Giraud, L Hatzofe, O Iglesias, J.J Karyakin, I Kobierzycki, E Kret, E Loercher, F López-López, P Miller, Y Mueller, T Nikolov, S.C De La Puente, J Sapir, N Saravia, V Sekercioglu, C.H Sillett, T.S Tavares, J Urios, V Marra, P.P. 2021 Differential survival throughout the full annual cycle of a migratory bird presents a life-history trade-off. Journal of Animal Ecology 90 5 1228 1238
dc.subject Zoologia
dc.subject Ornitologia
dc.title Differential survival throughout the full annual cycle of a migratory bird presents a life-history trade-off.
dc.type info:eu-repo/semantics/article
dc.date.updated 2022-02-09T12:06:23Z
dc.identifier.doi https://doi.org/10.1111/1365-2656.13449
dc.identifier.idgrec 150175

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