When parents play favorites: brood demand shapes parental preference for offspring UV color

Parents might initially produce more offspring than they might be able to raise. However, when offspring demand exceeds their parents´ rearing capacity, parents might shift care towards the offspring which yield greater fitness returns to achieve their optimal brood size via brood reduction. Such fa...

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Autores: García-Campa, Jorge, Müller, Wendt, Rodríguez-Juncá, Alicia, Morales, Judith
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/331938
Acceso en línea:http://hdl.handle.net/10261/331938
Access Level:acceso abierto
Palabra clave:Offspring quality signals
Parental care
Parental favoritism
Parent-offspring conflict
UV coloration
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spelling When parents play favorites: brood demand shapes parental preference for offspring UV colorGarcía-Campa, JorgeMüller, WendtRodríguez-Juncá, AliciaMorales, JudithOffspring quality signalsParental careParental favoritismParent-offspring conflictUV colorationParents might initially produce more offspring than they might be able to raise. However, when offspring demand exceeds their parents´ rearing capacity, parents might shift care towards the offspring which yield greater fitness returns to achieve their optimal brood size via brood reduction. Such favoritism could rely on offspring signaling traits if these inform parents about offspring quality and hence about the pay-offs of their investment. Here we investigated whether favoritism of blue tit (Cyanistes caeruleus) parents for an offspring signal (i.e., ultraviolet (UV) plumage coloration) varies with brood demand. To test this, we experimentally blocked the UV reflectance of yellow breast feathers in half of the nestlings of each brood, and then we sequentially performed two opposing brood size manipulations to vary nestling demand below or above parental rearing capacity. In reduced broods, nestlings begged overall less intensely and gained more body mass, supporting that parental rearing capacities sufficed to satisfy brood demand. Moreover, in reduced broods, UV-blocked nestlings (i.e., low-quality offspring) were fed and prey-tested more often. Yet, they begged more than control nestlings, suggesting that they were perhaps treated differently by other family members or which they may exploit parental preferences beyond actual need (at least in reduced nests). Parents flexibly shifted their feeding rate and favoritism in response to short-term changes in family size, as there was no parental preference for enlarged broods. Such flexible parental feeding rules may allow parents to gain the upper hand in parent-offspring conflict. However, we did not find evidence that parental favoritism facilitated brood reduction, at least in conditions where demand was temporally enhanced.Grant PID2019-106032GB-I00 (to JM) funded by MCIN/AEI/https://doi.org/10.13039/501100011033 and by “ERDF A way of making Europe.” JG-C was supported by Grant BES-2017-079750 and JM by a Ramón y Cajal contract RYC-2014-15145 funded by MCIN/AEI/ https://doi.org/10.13039/501100011033 and “ESF Investing in your future.”Peer reviewedOxford University PressMinisterio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/331938reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-106032GB-I00https://doi.org/10.1093/beheco/arad040Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3319382026-05-22T06:33:51Z
dc.title.none.fl_str_mv When parents play favorites: brood demand shapes parental preference for offspring UV color
title When parents play favorites: brood demand shapes parental preference for offspring UV color
spellingShingle When parents play favorites: brood demand shapes parental preference for offspring UV color
García-Campa, Jorge
Offspring quality signals
Parental care
Parental favoritism
Parent-offspring conflict
UV coloration
title_short When parents play favorites: brood demand shapes parental preference for offspring UV color
title_full When parents play favorites: brood demand shapes parental preference for offspring UV color
title_fullStr When parents play favorites: brood demand shapes parental preference for offspring UV color
title_full_unstemmed When parents play favorites: brood demand shapes parental preference for offspring UV color
title_sort When parents play favorites: brood demand shapes parental preference for offspring UV color
dc.creator.none.fl_str_mv García-Campa, Jorge
Müller, Wendt
Rodríguez-Juncá, Alicia
Morales, Judith
author García-Campa, Jorge
author_facet García-Campa, Jorge
Müller, Wendt
Rodríguez-Juncá, Alicia
Morales, Judith
author_role author
author2 Müller, Wendt
Rodríguez-Juncá, Alicia
Morales, Judith
author2_role author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Offspring quality signals
Parental care
Parental favoritism
Parent-offspring conflict
UV coloration
topic Offspring quality signals
Parental care
Parental favoritism
Parent-offspring conflict
UV coloration
description Parents might initially produce more offspring than they might be able to raise. However, when offspring demand exceeds their parents´ rearing capacity, parents might shift care towards the offspring which yield greater fitness returns to achieve their optimal brood size via brood reduction. Such favoritism could rely on offspring signaling traits if these inform parents about offspring quality and hence about the pay-offs of their investment. Here we investigated whether favoritism of blue tit (Cyanistes caeruleus) parents for an offspring signal (i.e., ultraviolet (UV) plumage coloration) varies with brood demand. To test this, we experimentally blocked the UV reflectance of yellow breast feathers in half of the nestlings of each brood, and then we sequentially performed two opposing brood size manipulations to vary nestling demand below or above parental rearing capacity. In reduced broods, nestlings begged overall less intensely and gained more body mass, supporting that parental rearing capacities sufficed to satisfy brood demand. Moreover, in reduced broods, UV-blocked nestlings (i.e., low-quality offspring) were fed and prey-tested more often. Yet, they begged more than control nestlings, suggesting that they were perhaps treated differently by other family members or which they may exploit parental preferences beyond actual need (at least in reduced nests). Parents flexibly shifted their feeding rate and favoritism in response to short-term changes in family size, as there was no parental preference for enlarged broods. Such flexible parental feeding rules may allow parents to gain the upper hand in parent-offspring conflict. However, we did not find evidence that parental favoritism facilitated brood reduction, at least in conditions where demand was temporally enhanced.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023
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/10261/331938
url http://hdl.handle.net/10261/331938
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-106032GB-I00
https://doi.org/10.1093/beheco/arad040
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
repository.mail.fl_str_mv
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