Publication
Niche segregation between immature and adult seabirds: Does progressive maturation play a role?
| dc.contributor.author | Campioni, Letizia | |
| dc.contributor.author | Granadeiro, José Pedro | |
| dc.contributor.author | Catry, Paulo | |
| dc.date.accessioned | 2016-11-07T18:48:31Z | |
| dc.date.available | 2016-11-07T18:48:31Z | |
| dc.date.issued | 2016 | |
| dc.description.abstract | In long-lived species with slow maturation, prebreeders often represent a large percentage of the individuals alive at any moment, but their ecology is still understudied. Recent studies have found prebreeding seabirds to differ in their isotopic (and trophic) niche from adult breeders attending the same nesting colonies. These differences have been hypothesized to be linked to the less-developed foraging performance of younger and less-experienced immatures or perhaps to their inferior competitive abilities. Such differences from adults would wane as individuals mature (“the progressive ontogenetic shift hypothesis”) and could underpin the prolonged breeding deferral until adulthood displayed by those species. This study documents a marked difference in the nitrogen and carbon isotopic ratios measured in the whole blood of immatures and breeders in 2 pelagic seabird species (Cory’s shearwaters, Calonectris borealis, and black-browed albatrosses, Thalassarche melanophris) nesting in contrasting environments. However, blood isotopic values did not present a relationship with prebreeder age, suggesting no gradual ontogenetic shift from an immature toward an adult isotopic niche. Furthermore, isotopic signatures of sabbatical adults could not be separated from those of immatures attending the same colonies, but were clearly segregated from adult breeders. These results suggest that isotopic differentiation between immatures and breeders is mainly linked to a factor unrelated to previous experience and hence probably unrelated to a hypothetical gradual improvement of foraging competence or competitive abilities. Any ecological differentiation between breeders and nonbreeders is more likely related to the severity of the central-place foraging constraints and to the energetic requirements of reproduction (“the reproductive constraint hypothesis”). | pt_PT |
| dc.description.sponsorship | Fundação para a Ciência e a Tecnologia (FCT); Permissão formal e suporte financeiro recebido de Falkland Islands Government | pt_PT |
| dc.identifier.citation | Behavioral Ecology, 27, 426-433. Doi: 10.1093/beheco/arv167 | pt_PT |
| dc.identifier.doi | 10.1093/beheco/arv167 | pt_PT |
| dc.identifier.issn | 1045-2249 | |
| dc.identifier.uri | http://hdl.handle.net/10400.12/5033 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.publisher | Oxford University Press | pt_PT |
| dc.relation | THE MISSING LINK: UNRAVELING THE ECOLOGY AND BEHAVIOR OF LONG-LIVED PELAGIC SEABIRDS BEFORE THEY RECRUIT TO THE BREEDING POPULATION | |
| dc.relation | Strategic Project - UI 331 - 2011-2012 | |
| dc.relation | Foraging ecology, movements and abundance of an avian predator of mesopelagic prey: new and deeper insights using novel techniques and ideas | |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | pt_PT |
| dc.subject | Calonectris borealis | pt_PT |
| dc.subject | Isotopic niche | pt_PT |
| dc.subject | Nonbreeders | pt_PT |
| dc.subject | Thalassarche melanophris | pt_PT |
| dc.subject | Trophic segregation | pt_PT |
| dc.title | Niche segregation between immature and adult seabirds: Does progressive maturation play a role? | pt_PT |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.awardTitle | THE MISSING LINK: UNRAVELING THE ECOLOGY AND BEHAVIOR OF LONG-LIVED PELAGIC SEABIRDS BEFORE THEY RECRUIT TO THE BREEDING POPULATION | |
| oaire.awardTitle | Strategic Project - UI 331 - 2011-2012 | |
| oaire.awardTitle | Foraging ecology, movements and abundance of an avian predator of mesopelagic prey: new and deeper insights using novel techniques and ideas | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/5876/UID%2FMAR%2F04292%2F2013/PT | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F89904%2F2012/PT | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/PEst-OE%2FMAR%2FUI0331%2F2011/PT | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR%2F121071%2F2010/PT | |
| oaire.citation.conferencePlace | United Kingdom | pt_PT |
| oaire.citation.endPage | 433 | pt_PT |
| oaire.citation.issue | 2 | pt_PT |
| oaire.citation.startPage | 426 | pt_PT |
| oaire.citation.title | Behavioral Ecology | pt_PT |
| oaire.citation.volume | 27 | pt_PT |
| oaire.fundingStream | 5876 | |
| oaire.fundingStream | 6817 - DCRRNI ID | |
| oaire.fundingStream | 3599-PPCDT | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| rcaap.rights | restrictedAccess | pt_PT |
| rcaap.type | article | pt_PT |
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