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Testing the usefulness of hydrogen and compound-specific stable isotope analyses in seabird feathers : a case study in two sympatric Antarctic storm-petrels

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dc.contributor.authorQuillfeldt, Petra
dc.contributor.authorThorn, Simon
dc.contributor.authorRichter, Benjamin
dc.contributor.authorNabte, Marcela
dc.contributor.authorCoria, Nestor
dc.contributor.authorMasello, Juan F.
dc.contributor.authorMassaro, Melanie
dc.contributor.authorNeves, Verónica C.
dc.contributor.authorLibertelli, Marcela
dc.date.accessioned2017-12-13T16:44:41Z
dc.date.available2017-12-13T16:44:41Z
dc.date.issued2017
dc.description.abstractNitrogen and carbon stable isotopes provide tools to investigate ecological segregation, prey choice and spatial distribution in seabirds. However, the interpretation of stable isotopes is frequently hampered by a lack of isotopic baseline data. In this study, two techniques proposed to overcome such shortages were tested: compound-specific isotope analyses of amino acids (AA-CSIA) and the analysis of hydrogen stable isotope ratios (HSIA). Feathers of two sympatric storm-petrels were compared. The two species, Black-bellied storm-petrels Fregetta tropicaand Wilson’s storm-petrels Oceanites oceanicus, moult in oceanic waters and differ in diet composition. For HSIA, a range of species with broad diet and non-breeding distribution was also investigated. Differences in carbon isotope values suggested differences in the spatial distribution and thus, in isotopic baseline values, during moult. Bulk nitrogen analyses of adult feathers did not detect species differences in trophic level. However, AA-CSIA detected clear differences in trophic levels in line with expectations: Black-bellied storm-petrels fed at a higher trophic level than Wilson‘s storm-petrels. Hydrogen values also differed between the species, but contrary to expectations were highly enriched in Black-bellied storm-petrels, but much less enriched in Wilson’s storm-petrels. Hydrogen data of seven petrel species challenge the suggestion that depleted δD values indicate a higher percentage of isosmotic fish. The present results suggest that the difference in hydrogen ratios may be explained by these petrels moulting in different ocean zones. Amino acid-specific stable isotope analyses were useful for estimating isotopic baselines and thus true trophic levels, whereas hydrogen isotopes were not.en
dc.description.sponsorshipDeutsche Forschungsgemeinschaft (DFG) in the framework of the priority programme SPP1154, Qu148/16pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationQuillfeldt P, Thorn S, Richter B, Nabte M, Coria N, Masello JF, Massaro M, Neves VC, Libertelli M. (2017). Testing the usefulness of hydrogen and compound-specific stable isotope analyses in seabird feathers: a case study in two sympatric Antarctic storm-petrels. Marine Biology, 164(9):192. DOI: https://doi.org/10.1007/s00227-017-3224-8pt_PT
dc.identifier.doi10.1007/s00227-017-3224-8pt_PT
dc.identifier.issn0025-3162 (Print)
dc.identifier.issn1432-1793 (Online)
dc.identifier.urihttp://hdl.handle.net/10400.3/4500
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringer Verlagpt_PT
dc.relationSOCIAL CHEMOSIGNALS OF PROCELLARIIFORMES USING CORY´S SHEARWATER AS A MODEL SPECIES
dc.subjectStable Isotope Analysisen
dc.subjectSeabird Feathersen
dc.subjectCarbon Stableen
dc.subjectHydrogen Stableen
dc.titleTesting the usefulness of hydrogen and compound-specific stable isotope analyses in seabird feathers : a case study in two sympatric Antarctic storm-petrelsen
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleSOCIAL CHEMOSIGNALS OF PROCELLARIIFORMES USING CORY´S SHEARWATER AS A MODEL SPECIES
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F88914%2F2012/PT
oaire.citation.endPage192pt_PT
oaire.citation.issue(9)pt_PT
oaire.citation.startPage164pt_PT
oaire.citation.titleMarine Biologyen
oaire.citation.volume164pt_PT
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isProjectOfPublication92b07319-d7a7-4038-8c64-128824d04992
relation.isProjectOfPublication.latestForDiscovery92b07319-d7a7-4038-8c64-128824d04992

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