Nestling sex ratio is unaffected by individual and population traits in the griffon vulture

Variation in offspring sex ratios is a central topic in animal demography and population dynamics. Most studies have focused on bird species with marked sexual dimorphism and multiple-nestling broods, where the offspring sex ratio is often biased due to different individual or environmental variable...

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Autores: Gómez-López, Guillermo, Martínez, Félix, Sanz-Aguilar, Ana, Carrete, Martina, Blanco, Guillermo
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/279589
Acceso en línea:http://hdl.handle.net/10261/279589
Access Level:acceso abierto
Palabra clave:Offspring sex ratio
Nestling sex
Gyps fulvus
Monomorphism
Mad-cow crisis
Demography
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spelling Nestling sex ratio is unaffected by individual and population traits in the griffon vultureGómez-López, GuillermoMartínez, FélixSanz-Aguilar, AnaCarrete, MartinaBlanco, GuillermoOffspring sex ratioNestling sexGyps fulvusMonomorphismMad-cow crisisDemographyVariation in offspring sex ratios is a central topic in animal demography and population dynamics. Most studies have focused on bird species with marked sexual dimorphism and multiple-nestling broods, where the offspring sex ratio is often biased due to different individual or environmental variables. However, biases in offspring sex ratios have been far less investigated in monomorphic and single-egg laying species, and few studies have evaluated long-term and large-scale variations in the sex ratio of nestling vultures. Here, we explore individual and environmental factors potentially affecting the secondary sex ratio of the monomorphic griffon vulture Gyps fulvus. We used information collected at three breeding nuclei from central Spain over a 30-year period (1990–2020) to analyse the effects of nestling age, parental age, breeding phenology, conspecific density, population reproductive parameters, and spatial and temporal variability on nestling sex. Sex ratio did not differ from parity either at the population or the nuclei level. No significant between-year differences were detected, even under highly changing conditions of food availability associated with the mad-cow crisis. We found that tree nesting breeders tend to have more sons than daughters, but as this nesting behavior is rare and we consequently have a small sample size, this issue would require additional examination. Whereas further research is needed to assess the potential effect of breeder identity on nestling sex ratio, this study contributes to understanding the basic ecology and population dynamics of Griffon Vultures, a long-lived species with deferred maturity and low fecundity, whose minor deviations in the offspring sex ratio might imply major changes at the population level.Research was funded by the Spanish Ministry of Economy, Industry, and Competitiveness through projects CGL2007-61395, CGL2010-15726, CGL2013-42451-P and PID2019-109685GB-I00 of the Spanish Ministry of Science and Innovation. G.G.L. was supported by a FPU fellowship of the Spanish Ministry of Science, Innovation and Universities (FPU19/06511). A.S.A. was supported by a Ramón y Cajal fellowship of the Spanish Ministry of Science (RYC-2017-22796).Peer reviewedOxford University PressMinisterio de Economía y Competitividad (España)Ministerio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/279589reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO//CGL2013-42451-Pinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-109685GB-I00Gómez-López, Guillermo; Martínez, Félix; Sanz-Aguilar, Ana; Carrete, Martina; Blanco, Guillermo; 2023; Supplementary materials. Nestling sex ratio is unaffected by individual and population traits in the griffon vultur [Dataset]; Oxford University Press; https://doi.org/10.1093/cz/zoac046https://doi.org/10.1093/cz/zoac046Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2795892026-05-22T06:33:51Z
dc.title.none.fl_str_mv Nestling sex ratio is unaffected by individual and population traits in the griffon vulture
title Nestling sex ratio is unaffected by individual and population traits in the griffon vulture
spellingShingle Nestling sex ratio is unaffected by individual and population traits in the griffon vulture
Gómez-López, Guillermo
Offspring sex ratio
Nestling sex
Gyps fulvus
Monomorphism
Mad-cow crisis
Demography
title_short Nestling sex ratio is unaffected by individual and population traits in the griffon vulture
title_full Nestling sex ratio is unaffected by individual and population traits in the griffon vulture
title_fullStr Nestling sex ratio is unaffected by individual and population traits in the griffon vulture
title_full_unstemmed Nestling sex ratio is unaffected by individual and population traits in the griffon vulture
title_sort Nestling sex ratio is unaffected by individual and population traits in the griffon vulture
dc.creator.none.fl_str_mv Gómez-López, Guillermo
Martínez, Félix
Sanz-Aguilar, Ana
Carrete, Martina
Blanco, Guillermo
author Gómez-López, Guillermo
author_facet Gómez-López, Guillermo
Martínez, Félix
Sanz-Aguilar, Ana
Carrete, Martina
Blanco, Guillermo
author_role author
author2 Martínez, Félix
Sanz-Aguilar, Ana
Carrete, Martina
Blanco, Guillermo
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Ministerio de Ciencia e Innovación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Offspring sex ratio
Nestling sex
Gyps fulvus
Monomorphism
Mad-cow crisis
Demography
topic Offspring sex ratio
Nestling sex
Gyps fulvus
Monomorphism
Mad-cow crisis
Demography
description Variation in offspring sex ratios is a central topic in animal demography and population dynamics. Most studies have focused on bird species with marked sexual dimorphism and multiple-nestling broods, where the offspring sex ratio is often biased due to different individual or environmental variables. However, biases in offspring sex ratios have been far less investigated in monomorphic and single-egg laying species, and few studies have evaluated long-term and large-scale variations in the sex ratio of nestling vultures. Here, we explore individual and environmental factors potentially affecting the secondary sex ratio of the monomorphic griffon vulture Gyps fulvus. We used information collected at three breeding nuclei from central Spain over a 30-year period (1990–2020) to analyse the effects of nestling age, parental age, breeding phenology, conspecific density, population reproductive parameters, and spatial and temporal variability on nestling sex. Sex ratio did not differ from parity either at the population or the nuclei level. No significant between-year differences were detected, even under highly changing conditions of food availability associated with the mad-cow crisis. We found that tree nesting breeders tend to have more sons than daughters, but as this nesting behavior is rare and we consequently have a small sample size, this issue would require additional examination. Whereas further research is needed to assess the potential effect of breeder identity on nestling sex ratio, this study contributes to understanding the basic ecology and population dynamics of Griffon Vultures, a long-lived species with deferred maturity and low fecundity, whose minor deviations in the offspring sex ratio might imply major changes at the population level.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/279589
url http://hdl.handle.net/10261/279589
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO//CGL2013-42451-P
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-109685GB-I00
Gómez-López, Guillermo; Martínez, Félix; Sanz-Aguilar, Ana; Carrete, Martina; Blanco, Guillermo; 2023; Supplementary materials. Nestling sex ratio is unaffected by individual and population traits in the griffon vultur [Dataset]; Oxford University Press; https://doi.org/10.1093/cz/zoac046
https://doi.org/10.1093/cz/zoac046
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
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