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dc.contributor.author
Fiorini, Vanina Dafne  
dc.contributor.author
Gloag, Ros  
dc.contributor.author
Kacelnik, Alex  
dc.contributor.author
Reboreda, Juan Carlos  
dc.date.available
2017-12-27T20:01:16Z  
dc.date.issued
2014-06  
dc.identifier.citation
Reboreda, Juan Carlos; Gloag, Ros; Fiorini, Vanina Dafne; Kacelnik, Alex; Strategic egg destruction by brood-parasitic cowbirds?; Elsevier; Animal Behaviour; 93; 6-2014; 229-235  
dc.identifier.issn
0003-3472  
dc.identifier.uri
http://hdl.handle.net/11336/31718  
dc.description.abstract
Obligate avian brood parasites do not provide direct care to their young but can indirectly increase their offspring's success in host nests. One way in which parasitic cowbirds (Molothrus sp.) could achieve this is through egg puncturing, whereby, prior to laying in a nest, females puncture the eggs that are already present in the nest to reduce the competition that their offspring will later face for food. In this study we investigated whether cowbirds strategically increase their puncturing effort with increasing competitiveness of the future brood. We filmed egg-puncturing behaviour by shiny cowbirds, Molothrus bonariensis, at nests of chalk-browed mockingbirds, Mimus saturninus, a large host whose nests often receive multiple cowbird eggs. We presented cowbirds with large (4 eggs) or small (1 egg) clutches of either mockingbird or cowbird eggs, where large clutch sizes predict greater intrabrood competition than small clutch sizes, and mockingbird eggs (which are larger) predict greater competition than other cowbird eggs. Cowbirds delivered more pecks and punctured more eggs per visit to larger clutches, and mockingbird eggs were broken more often than cowbird eggs, but pecked less per visit. The higher number of pecks aimed at cowbird eggs, despite these producing less competitive nestmates, could reflect responses to eggshell strength rather than egg size, as cowbird eggs are harder to break because of their thicker shells and so require more effort to puncture. Our results show that cowbird puncturing behaviour is not rigid and varies with nest contents. We suggest this variation is consistent with females increasing their offspring's chance of survival.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/  
dc.subject
Brood Parasitism  
dc.subject
Shiny Cowbird  
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Egg Pecking  
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Egg Strength  
dc.subject.classification
Otras Ciencias Biológicas  
dc.subject.classification
Ciencias Biológicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Strategic egg destruction by brood-parasitic cowbirds?  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2017-12-27T15:19:07Z  
dc.journal.volume
93  
dc.journal.pagination
229-235  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Fiorini, Vanina Dafne. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina  
dc.description.fil
Fil: Gloag, Ros. University of Oxford; Reino Unido  
dc.description.fil
Fil: Kacelnik, Alex. University of Oxford; Reino Unido  
dc.description.fil
Fil: Reboreda, Juan Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina  
dc.journal.title
Animal Behaviour  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.anbehav.2014.04.038  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0003347214002097