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dc.contributor.authorRuiz-Raya, Francisco
dc.contributor.authorSoler Cruz, Manuel 
dc.contributor.authorSánchez-Pérez, Lucía Ll.
dc.contributor.authorIbáñez-Álamo, Juan Diego
dc.identifier.citationRuiz-Raya, F.; et al. Could a Factor That Does Not Affect Egg Recognition Influence the Decision of Rejection?. Plos One, 10(8): e0135624 (2015). []es_ES
dc.description.abstractRejection of the parasitic egg is the most important defence of hosts against brood parasites. However, this response is variable among and within species, and egg discrimination is not always followed by egg rejection. Low risk of parasitism and high risk of rejection costs may lead to the acceptance of the parasitic egg even if it has been previously recognized. The main aim of this paper is to answer a relevant question: can a single egg trait provoke the acceptance of an experimental egg previously recognized as foreign? Increased egg mass should hamper the ejection of an egg that has been discriminated because ejection of a heavy egg may imply higher rejection costs for hosts. We have tested this prediction by experimentally parasitizing natural nests of Common Blackbirds (Turdus merula) with non-mimetic model eggs of different mass (heavy, normal-weight, and light) while controlling for potential confounding factors such as egg size and colour. Our results showed that blackbirds more frequently accepted heavy eggs, even when previously recognized. This differential acceptance may be related to insufficient motivation to assume the higher costs that the ejection of a heavy egg could impose.es_ES
dc.description.sponsorshipFinancial support has been provided by the Consejería Economía, Innovación, Ciencia y Empleo, Junta de Andalucia (research project CVI-6653).es_ES
dc.publisherPublic Library of Science (PLOS)es_ES
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivs 3.0 Licensees_ES
dc.subjectParasite evolutiones_ES
dc.subjectBirds es_ES
dc.subjectGeneralized linear modeles_ES
dc.subjectImitation es_ES
dc.subjectEvolutionary adaptationes_ES
dc.subjectEvolutionary geneticses_ES
dc.titleCould a Factor That Does Not Affect Egg Recognition Influence the Decision of Rejection?es_ES

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