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dc.contributor.authorDavidsen, Jan Grimsrud
dc.contributor.authorBordeleau, Xavier
dc.contributor.authorEldøy, Sindre Håvarstein
dc.contributor.authorWhoriskey, Frederick G.
dc.contributor.authorPower, Michael John
dc.contributor.authorCrossin, Glenn T
dc.contributor.authorBuhariwalla, Colin
dc.contributor.authorGaudin, Philippe
dc.date.accessioned2021-10-14T11:56:20Z
dc.date.available2021-10-14T11:56:20Z
dc.date.created2021-05-28T18:52:30Z
dc.date.issued2021
dc.identifier.issn2045-2322
dc.identifier.urihttps://hdl.handle.net/11250/2823034
dc.description.abstractIn 1954, brown trout were introduced to the Kerguelen archipelago (49°S, 70°E), a pristine, sub-Antarctic environment previously devoid of native freshwater fishes. Trout began spreading rapidly via coastal waters to colonize adjacent watersheds, however, recent and unexpectedly the spread has slowed. To better understand the ecology of the brown trout here, and why their expansion has slowed, we documented the marine habitat use, foraging ecology, and environmental conditions experienced over one year by 50 acoustically tagged individuals at the colonization front. Trout mainly utilized the marine habitat proximate to their tagging site, ranging no further than 7 km and not entering any uncolonized watersheds. Nutritional indicators showed that trout were in good condition at the time of tagging. Stomach contents and isotope signatures in muscle of additional trout revealed a diet of amphipods (68%), fish (23%), isopods (6%), and zooplankton (6%). The small migration distances observed, presence of suitable habitat, and rich local foraging opportunities suggest that trout can achieve their resource needs close to their home rivers. This may explain why the expansion of brown trout at Kerguelen has slowed.en_US
dc.language.isoengen_US
dc.publisherNature Researchen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleMarine habitat use and feeding ecology of introduced anadromous brown trout at the colonization front of the sub-Antarctic Kerguelen archipelagoen_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.description.versionpublishedVersionen_US
dc.source.volume11en_US
dc.source.journalScientific Reportsen_US
dc.identifier.doi10.1038/s41598-021-91405-x
dc.identifier.cristin1912626
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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