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dc.contributor.authorGrecian, W. James
dc.contributor.authorMcGill, Rona A. R.
dc.contributor.authorPhillips, Richard A.
dc.contributor.authorRyan, Peter G.
dc.contributor.authorFurness, Robert W.
dc.date.accessioned2017-05-15T14:30:12Z
dc.date.available2017-05-15T14:30:12Z
dc.date.issued2015-04
dc.identifier.citationGrecian , W J , McGill , R A R , Phillips , R A , Ryan , P G & Furness , R W 2015 , ' Quantifying variation in δ 13 C and δ 15 N isotopes within and between feathers and individuals : is one sample enough? ' , Marine Biology , vol. 162 , no. 4 , pp. 733-741 . https://doi.org/10.1007/s00227-015-2618-8en
dc.identifier.issn0025-3162
dc.identifier.otherPURE: 249954324
dc.identifier.otherPURE UUID: bd7be214-530a-408e-87d6-08374729764e
dc.identifier.otherScopus: 84925519537
dc.identifier.otherORCID: /0000-0002-6428-719X/work/32706776
dc.identifier.urihttps://hdl.handle.net/10023/10774
dc.descriptionThis study represents a contribution to the ecosystems component of the British Antarctic Survey Polar Science for Planet Earth Programme, funded by The Natural Environment Research Council and through a NERC standard grant NE/I02237X/1.en
dc.description.abstractStudies of avian migration increasingly use stable isotope analysis to provide vital trophic and spatial markers. However, when interpreting differences in stable isotope values of feathers, many studies are forced to make assumptions about the timing of moult. A fundamental question remains about the consistency of these values within and between feathers from the same individual. In this study, we examine variation in carbon and nitrogen isotopes by sub-sampling feathers collected from the wings of adults of two small congeneric petrel species, the broad-billed Pachyptila vittata and Antarctic prion P. desolata. Broad-billed prion feather vane material was enriched in 15N compared to feather rachis material, but there was no detectable difference in δ13C. Comparison of multiple samples taken from Antarctic prion feathers indicated subtle difference in isotopes; rachis material was enriched in 13C compared to vane material, and there were differences along the length of the feather, with samples from the middle and tip of the feather depleted in 15N compared to those from the base. While the greatest proportion of model variance was explained by differences between feathers and individuals, the magnitude of these within-feather differences was up to 0.5 ‰ in δ15N and 0.8 ‰ in δ13C. We discuss the potential drivers of these differences, linking isotopic variation to individual-level dietary differences, movement patterns and temporal dietary shifts. A novel result is that within-feather differences in δ13C may be attributed to differences in keratin structure within feathers, suggesting further work is required to understand the role of different amino acids. Our results highlight the importance of multiple sampling regimes that consider both within- and between-feather variation in studies using stable isotopes.
dc.format.extent9
dc.language.isoeng
dc.relation.ispartofMarine Biologyen
dc.rights© The Author(s) 2015. This article is published with open access at Springerlink.com. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.en
dc.subjectQH301 Biologyen
dc.subjectQD Chemistryen
dc.subjectNDASen
dc.subject.lccQH301en
dc.subject.lccQDen
dc.titleQuantifying variation in δ13C and δ15N isotopes within and between feathers and individuals : is one sample enough?en
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Biologyen
dc.contributor.institutionUniversity of St Andrews. Sea Mammal Research Uniten
dc.contributor.institutionUniversity of St Andrews. Scottish Oceans Instituteen
dc.identifier.doihttps://doi.org/10.1007/s00227-015-2618-8
dc.description.statusPeer revieweden
dc.identifier.urlhttp://link.springer.com/article/10.1007%2Fs00227-015-2618-8#SupplementaryMaterialen


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