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dc.contributor.authorVacquie-Garcia, Jade
dc.contributor.authorLydersen, Christian
dc.contributor.authorBiuw, Martin
dc.contributor.authorHaug, Tore
dc.contributor.authorFedak, Mike A.
dc.contributor.authorKovacs, Kit M.
dc.date.accessioned2017-12-07T15:30:16Z
dc.date.available2017-12-07T15:30:16Z
dc.date.issued2017-12-06
dc.identifier.citationVacquie-Garcia , J , Lydersen , C , Biuw , M , Haug , T , Fedak , M A & Kovacs , K M 2017 , ' Hooded seal Cystophora cristata f oraging areas in the Northeast Atlantic Ocean— investigated using three complementary methods ' , PLoS One , vol. 12 , no. 12 , e0187889 . https://doi.org/10.1371/journal.pone.0187889en
dc.identifier.issn1932-6203
dc.identifier.otherPURE: 251709604
dc.identifier.otherPURE UUID: 3bf2cd9d-d579-4fbb-87f7-27f65eb3d9a9
dc.identifier.otherScopus: 85037330532
dc.identifier.otherORCID: /0000-0002-9569-1128/work/47136225
dc.identifier.otherWOS: 000417212200021
dc.identifier.urihttp://hdl.handle.net/10023/12288
dc.descriptionThis work was funded by the Norwegian Research Council (grant number 176477/S30), within the Norwegian International Polar Year programme and the Norwegian Polar Institute.en
dc.description.abstractIdentifying environmental characteristics that define the ecological niche of a species is essential to understanding how changes in physical conditions might affect its distribution and other aspects of its ecology. The present study used satellite relay data loggers (SRDLs) to study habitat use by Northeast Atlantic hooded seals (N = 20; 9 adult females, 3 adult males, and 8 juveniles). Three different methods were used in combination to achieve maximum insight regarding key foraging areas for hooded seals in this region, which have decline by 85% in recent decades: 1) first passage time (FPT); 2) vertical transit rate and; 3) change in dive drift rate. Generalized additive mixed models (GAMM) were applied to each method to determine whether specific habitat haracteristics were associated with foraging. Separate models were run for the post-molting and the post-breeding seasons; sex and age classes were included in the GAMMs. All three methods highlighted a few common geographic areas as being important foraging zones; however, there were also some different areas identified by the different methods, which highlights the importance of using multiple indexes when analyzing tracking and diving data to study foraging behavior. Foraging occurred most commonly in relatively shallow areas with high Sea Surface Temperatures (SST), corresponding to continental shelf areas with Atlantic Water masses. All age and sex classes overlapped spatially to some extent, but the different age and sex groups showed differences in the bathymetry of their foraging areas as well as in their vertical use of the water column. When foraging, pups dove in the upper part of the water column in relatively deep areas. Adult females foraged relatively shallowly in deep water areas too, though in shallower areas than pups. Adult males foraged close to the bottom in shallower areas.
dc.format.extent23
dc.language.isoeng
dc.relation.ispartofPLoS Oneen
dc.rights© 2017 Vacquie-Garcia et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en
dc.subjectQH301 Biologyen
dc.subjectDASen
dc.subject.lccQH301en
dc.titleHooded seal Cystophora cristata foraging areas in the Northeast Atlantic Ocean— investigated using three complementary methodsen
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/10.1371/journal.pone.0187889
dc.description.statusPeer revieweden


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