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dc.contributor.authorGlew, Katie St. John
dc.contributor.authorWanless, Sarah
dc.contributor.authorHarris, Michael P.
dc.contributor.authorDaunt, Francis
dc.contributor.authorErikstad, Kjell E
dc.contributor.authorStrøm, Hallvard
dc.contributor.authorTrueman, Clive N.
dc.coverage.spatialIsle of May, Scotland, East coast of England, Southern North Sea, East coast of Sctlandnb_NO
dc.identifier.citationMarine Ecology Progress Series. 2018, 599 239-251.nb_NO
dc.description.abstractMany pelagic seabirds moult their feathers while at sea, which is an energetically costly behaviour. Mortality rates during moult can be high, so spatial and trophic ecology during this critical period is important for understanding demographic patterns. Unfortunately, individual foraging behaviours specifically linked to at-sea moulting are commonly unclear. This paper combines 2 different approaches to geolocation: data from bird-borne geolocation loggers and stableisotope assignment using carbon and nitrogen isotope maps (isoscapes). Coupling 2 geolocation processes allows some uncertainties associated with isotope-based assignment to be constrained. We applied this approach to quantify species-specific foraging locations and individual trophic variability during feather regrowth in 3 sympatric auk populations breeding on the Isle of May, Scotland (common guillemot Uria aalge, razorbill Alca torda and Atlantic puffin Fratercula arctica). Inferred foraging areas during moult differed between species and feather types. Guillemots likely underwent moult within the southern North Sea, razorbills along the east coast of England and into the southern North Sea and puffins off the east coast of Scotland. Estimates of individual trophic position varied considerably within feather types (up to 1 trophic level difference between individuals), among feather types grown during different time periods and across the 3 species, with guillemots consistently foraging at higher trophic positions than razorbills and puffins. Used in combination, these methods better constrain foraging areas during moulting, and provide a technique to explore individual differences and flexibility in foraging strategy, which is valuable information for both seabird conservation and marine spatial planning.nb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.subjectTrophic ecologynb_NO
dc.subjectAtlantic puffinnb_NO
dc.subjectCommon guillemotnb_NO
dc.titleMoult location and diet of auks in the North Sea inferred from coupled light-based and isotope-based geolocationnb_NO
dc.title.alternativeMoult location and diet of auks in the North Sea inferred from coupled light-based and isotope-based geolocationnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480nb_NO
dc.source.journalMarine Ecology Progress Seriesnb_NO
dc.relation.projectAndre: SPITFIRENERC DTP partnership 1498919nb_NO
dc.relation.projectAndre: SEATRACK ( seatrack/)nb_NO
dc.relation.projectAndre: SMMInb_NO
dc.relation.projectAndre: Natural Environment Research Council (NERC)nb_NO

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal