Age-Specific Demographic Response of a Long-Lived Scavenger Species to Reduction of Organic Matter in a Landfill

Food availability shapes demographic parameters and population dynamics. Certain species have adapted to predictable anthropogenic food resources like landfills. However, abrupt shifts in food availability can negatively impact such populations. While changes in survival are expected, the age-relate...

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Detalles Bibliográficos
Autores: Arévalo-Ayala, Diego José, Real, Joan, Mañosa, Santi, Aymerich, Joan, Durà, Carles, Hernández Matías, Antonio, 1974-
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/221233
Acceso en línea:https://hdl.handle.net/2445/221233
Access Level:acceso abierto
Palabra clave:Rapinyaires
Alimentació animal
Estadística bayesiana
Migració d'ocells
Poblacions animals
Birds of prey
Animal feeding
Bayesian statistical decision
Birds migration
Animal populations
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spelling Age-Specific Demographic Response of a Long-Lived Scavenger Species to Reduction of Organic Matter in a LandfillArévalo-Ayala, Diego JoséReal, JoanMañosa, SantiAymerich, JoanDurà, CarlesHernández Matías, Antonio, 1974-RapinyairesAlimentació animalEstadística bayesianaMigració d'ocellsPoblacions animalsBirds of preyAnimal feedingBayesian statistical decisionBirds migrationAnimal populationsFood availability shapes demographic parameters and population dynamics. Certain species have adapted to predictable anthropogenic food resources like landfills. However, abrupt shifts in food availability can negatively impact such populations. While changes in survival are expected, the age-related effects remain poorly understood, particularly in long-lived scavenger species. We investigated the age-specific demographic response of a Griffon vulture (Gyps fulvus) population to a reduction in organic matter in a landfill and analyzed apparent survival and the probability of transience after initial capture using a Bayesian Cormack-Jolly-Seber model on data from 2012–2022. The proportion of transients among newly captured immatures and adults increased after the reduction in food. Juvenile apparent survival declined, increased in immature residents, and decreased in adult residents. These results suggest that there was a greater likelihood of permanent emigration due to intensified intraspecific competition following the reduction in food. Interestingly, resident immatures showed the opposite trend, suggesting the persistence of high-quality individuals despite the food scarcity. Although the reasons behind the reduced apparent survival of resident adults in the final four years of the study remain unclear, non-natural mortality potentially plays a part. In Europe landfill closure regulations are being implemented and pose a threat to avian scavenger populations, which underlines the need for research on food scarcity scenarios and proper conservation measures.MDPI2025202520232025info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion20 p.application/pdfhttps://hdl.handle.net/2445/221233Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.3390/ani13223529Animals, 2023, vol. 13, num.22, p. 1-20https://doi.org/10.3390/ani13223529cc-by (c) Arévalo-Ayala, D.J. et al., 2023http://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/2212332026-05-29T05:05:01Z
dc.title.none.fl_str_mv Age-Specific Demographic Response of a Long-Lived Scavenger Species to Reduction of Organic Matter in a Landfill
title Age-Specific Demographic Response of a Long-Lived Scavenger Species to Reduction of Organic Matter in a Landfill
spellingShingle Age-Specific Demographic Response of a Long-Lived Scavenger Species to Reduction of Organic Matter in a Landfill
Arévalo-Ayala, Diego José
Rapinyaires
Alimentació animal
Estadística bayesiana
Migració d'ocells
Poblacions animals
Birds of prey
Animal feeding
Bayesian statistical decision
Birds migration
Animal populations
title_short Age-Specific Demographic Response of a Long-Lived Scavenger Species to Reduction of Organic Matter in a Landfill
title_full Age-Specific Demographic Response of a Long-Lived Scavenger Species to Reduction of Organic Matter in a Landfill
title_fullStr Age-Specific Demographic Response of a Long-Lived Scavenger Species to Reduction of Organic Matter in a Landfill
title_full_unstemmed Age-Specific Demographic Response of a Long-Lived Scavenger Species to Reduction of Organic Matter in a Landfill
title_sort Age-Specific Demographic Response of a Long-Lived Scavenger Species to Reduction of Organic Matter in a Landfill
dc.creator.none.fl_str_mv Arévalo-Ayala, Diego José
Real, Joan
Mañosa, Santi
Aymerich, Joan
Durà, Carles
Hernández Matías, Antonio, 1974-
author Arévalo-Ayala, Diego José
author_facet Arévalo-Ayala, Diego José
Real, Joan
Mañosa, Santi
Aymerich, Joan
Durà, Carles
Hernández Matías, Antonio, 1974-
author_role author
author2 Real, Joan
Mañosa, Santi
Aymerich, Joan
Durà, Carles
Hernández Matías, Antonio, 1974-
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Rapinyaires
Alimentació animal
Estadística bayesiana
Migració d'ocells
Poblacions animals
Birds of prey
Animal feeding
Bayesian statistical decision
Birds migration
Animal populations
topic Rapinyaires
Alimentació animal
Estadística bayesiana
Migració d'ocells
Poblacions animals
Birds of prey
Animal feeding
Bayesian statistical decision
Birds migration
Animal populations
description Food availability shapes demographic parameters and population dynamics. Certain species have adapted to predictable anthropogenic food resources like landfills. However, abrupt shifts in food availability can negatively impact such populations. While changes in survival are expected, the age-related effects remain poorly understood, particularly in long-lived scavenger species. We investigated the age-specific demographic response of a Griffon vulture (Gyps fulvus) population to a reduction in organic matter in a landfill and analyzed apparent survival and the probability of transience after initial capture using a Bayesian Cormack-Jolly-Seber model on data from 2012–2022. The proportion of transients among newly captured immatures and adults increased after the reduction in food. Juvenile apparent survival declined, increased in immature residents, and decreased in adult residents. These results suggest that there was a greater likelihood of permanent emigration due to intensified intraspecific competition following the reduction in food. Interestingly, resident immatures showed the opposite trend, suggesting the persistence of high-quality individuals despite the food scarcity. Although the reasons behind the reduced apparent survival of resident adults in the final four years of the study remain unclear, non-natural mortality potentially plays a part. In Europe landfill closure regulations are being implemented and pose a threat to avian scavenger populations, which underlines the need for research on food scarcity scenarios and proper conservation measures.
publishDate 2023
dc.date.none.fl_str_mv 2023
2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/221233
url https://hdl.handle.net/2445/221233
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.3390/ani13223529
Animals, 2023, vol. 13, num.22, p. 1-20
https://doi.org/10.3390/ani13223529
dc.rights.none.fl_str_mv cc-by (c) Arévalo-Ayala, D.J. et al., 2023
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Arévalo-Ayala, D.J. et al., 2023
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 20 p.
application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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