English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/122001
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Could a Factor That Does Not Affect Egg Recognition Influence the Decision of Rejection?

AuthorsRuiz-Raya, Francisco; Soler, Manuel; Sánchez-Pérez, Lucía Ll.; Ibáñez-Álamo, Juan Diego
Issue Date2015
PublisherPublic Library of Science
CitationPLoS ONE, 10(8): e0135624 (2015)
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.
Publisher version (URL)http://dx.doi.org/10.1371/ journal.pone.0135624
DOI10.1371/ journal.pone.0135624
Appears in Collections:(EBD) Artículos
Files in This Item:
File Description SizeFormat 
journal.pone.0135624.pdf9,7 MBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.