The Role of Hatching Asynchrony in a Seabird Species Exhibiting Obligate Brood Reduction
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...
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ftconicet:oai:ri.conicet.gov.ar:11336/56666 2023-10-09T21:55:15+02:00 The Role of Hatching Asynchrony in a Seabird Species Exhibiting Obligate Brood Reduction Giudici, Paula Inés Quintana, Flavio Roberto Svagelj, Walter Sergio application/pdf http://hdl.handle.net/11336/56666 eng eng Waterbird Society info:eu-repo/semantics/altIdentifier/doi/10.1675/063.040.0304 info:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/10.1675/063.040.0304 http://hdl.handle.net/11336/56666 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 1524-4695 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ FLEDGING CONDITION IMPERIAL CORMORANT INSURANCE MARGINAL OFFSPRING PHALACROCORAX ATRICEPS SIBLING ASYMMETRY https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1675/063.040.0304 2023-09-24T18:21:03Z 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. 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 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 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. ... Article in Journal/Newspaper Phalacrocorax atriceps CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentina Waterbirds 40 3 221 232 |
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Open Polar |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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ftconicet |
language |
English |
topic |
FLEDGING CONDITION IMPERIAL CORMORANT INSURANCE MARGINAL OFFSPRING PHALACROCORAX ATRICEPS SIBLING ASYMMETRY https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
FLEDGING CONDITION IMPERIAL CORMORANT INSURANCE MARGINAL OFFSPRING PHALACROCORAX ATRICEPS SIBLING ASYMMETRY https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Giudici, Paula Inés Quintana, Flavio Roberto Svagelj, Walter Sergio The Role of Hatching Asynchrony in a Seabird Species Exhibiting Obligate Brood Reduction |
topic_facet |
FLEDGING CONDITION IMPERIAL CORMORANT INSURANCE MARGINAL OFFSPRING PHALACROCORAX ATRICEPS SIBLING ASYMMETRY https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
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. 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 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 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. ... |
format |
Article in Journal/Newspaper |
author |
Giudici, Paula Inés Quintana, Flavio Roberto Svagelj, Walter Sergio |
author_facet |
Giudici, Paula Inés Quintana, Flavio Roberto Svagelj, Walter Sergio |
author_sort |
Giudici, Paula Inés |
title |
The Role of Hatching Asynchrony in a Seabird Species Exhibiting Obligate Brood Reduction |
title_short |
The Role of Hatching Asynchrony in a Seabird Species Exhibiting Obligate Brood Reduction |
title_full |
The Role of Hatching Asynchrony in a Seabird Species Exhibiting Obligate Brood Reduction |
title_fullStr |
The Role of Hatching Asynchrony in a Seabird Species Exhibiting Obligate Brood Reduction |
title_full_unstemmed |
The Role of Hatching Asynchrony in a Seabird Species Exhibiting Obligate Brood Reduction |
title_sort |
role of hatching asynchrony in a seabird species exhibiting obligate brood reduction |
publisher |
Waterbird Society |
url |
http://hdl.handle.net/11336/56666 |
geographic |
Argentina |
geographic_facet |
Argentina |
genre |
Phalacrocorax atriceps |
genre_facet |
Phalacrocorax atriceps |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1675/063.040.0304 info:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/10.1675/063.040.0304 http://hdl.handle.net/11336/56666 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 1524-4695 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1675/063.040.0304 |
container_title |
Waterbirds |
container_volume |
40 |
container_issue |
3 |
container_start_page |
221 |
op_container_end_page |
232 |
_version_ |
1779319105500741632 |