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dc.contributor.author
Giudici, Paula Inés
dc.contributor.author
Quintana, Flavio Roberto
dc.contributor.author
Svagelj, Walter Sergio
dc.date.available
2018-08-22T18:56:15Z
dc.date.issued
2017-09
dc.identifier.citation
Giudici, Paula Inés; Quintana, Flavio Roberto; Svagelj, Walter Sergio; The Role of Hatching Asynchrony in a Seabird Species Exhibiting Obligate Brood Reduction; Waterbird Society; Waterbirds; 40; 3; 9-2017; 221-232
dc.identifier.issn
1524-4695
dc.identifier.uri
http://hdl.handle.net/11336/56666
dc.description.abstract
Brood reduction is a within-brood partial mortality due to sibling rivalry, and, in some species, the death of at least one sibling in the brood is almost guaranteed (obligate brood-reducers). Imperial Cormorants (Phalacrocorax atriceps) usually lay three-egg clutches that hatch asynchronously over 4-5 days. This species exhibits obligate brood reduction, and last-laid (marginal) eggs serve as insurance against early failure of elder (core) members. Within-brood sibling asymmetries were manipulated to analyze their effects on breeding success, brood reduction, parental body condition and chick growth. Two types of symmetrical broods containing three similar-sized chicks at the beginning of chick-rearing (3-days old) and close to the peak in brood reduction (8-days old) were generated to contrast the natural asymmetrical brood. Breeding success and parental condition were unrelated to sibling asymmetry levels. Asymptotic mass of fledglings from 8-day old broods was lower than those for natural and 3-day old broods. Our results suggest that hatching asynchrony favors early brood reduction and improves fledging condition. Regardless of asymmetry levels, Imperial Cormorants were obligate reducers, and the insurance value provided by the marginal chick was negligible. Therefore, the insurance value of the marginal offspring appears to serve mainly at the egg stage.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Waterbird Society
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Fledging Condition
dc.subject
Imperial Cormorant
dc.subject
Insurance
dc.subject
Marginal Offspring
dc.subject
Phalacrocorax Atriceps
dc.subject
Sibling Asymmetry
dc.subject.classification
Otras Ciencias Biológicas
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
The Role of Hatching Asynchrony in a Seabird Species Exhibiting Obligate Brood Reduction
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-08-21T13:45:56Z
dc.journal.volume
40
dc.journal.number
3
dc.journal.pagination
221-232
dc.journal.pais
Estados Unidos
dc.journal.ciudad
De Leon
dc.description.fil
Fil: Giudici, Paula Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biología de Organismos Marinos; Argentina
dc.description.fil
Fil: Quintana, Flavio Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biología de Organismos Marinos; Argentina
dc.description.fil
Fil: Svagelj, Walter Sergio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
dc.journal.title
Waterbirds
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1675/063.040.0304
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/10.1675/063.040.0304


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