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dc.contributor.authorMoccetti, Paolo Maria
dc.contributor.authorSiwertsson, Anna
dc.contributor.authorKjær, Runar
dc.contributor.authorAmundsen, Per-Arne
dc.contributor.authorPræbel, Kim
dc.contributor.authorTamayo, Ana-Maria Peris
dc.contributor.authorPower, Michael
dc.contributor.authorKnudsen, Rune
dc.coverage.spatialNorwayen_US
dc.date.accessioned2022-10-05T09:05:23Z
dc.date.available2022-10-05T09:05:23Z
dc.date.created2019-06-28T11:24:47Z
dc.date.issued2019-05-15
dc.identifier.citationHydrobiologia. 2019, 840 (1), 281-299.en_US
dc.identifier.issn0018-8158
dc.identifier.urihttps://hdl.handle.net/11250/3023958
dc.description.abstractParallelism in trophic niches of polymorphic populations of Arctic charr was investigated in two similar subarctic lakes, Tårnvatn and Skøvatn, in northern Norway. Analysis of eleven microsatellite loci confirmed, respectively, the existence of three and two genetically differentiated morphs. Three methods were used to describe their trophic niches: habitat choice and stomach contents for the recent feeding behaviour, and trophically transmitted parasites and stable isotopes (d13C and d15N) as proxies for the longer term trophic niche differences. The results showed a distinct segregation in trophic resource utilization of the different morphs. Tårnvatn has three morphs: a littoral omnivorous (LO), a small-sized profundal benthivorous (PB), and a large-sized profundal piscivorous (PP). In contrast, a novel Arctic charr morph was discovered in Skøvatn: a small-sized profundal zooplanktivorous-morph (PZ), which when compared to the sympatric LO-morph, had distinct stable isotope values and a contrasting parasite community. A parallelism in habitat choice and external morphology was found among the small sized, deep-water morphs and between the upper water, omnivorous LO-morphs in both lakes. There was a no parallel pattern in diet choice between the PB- and the PZ-morphs. These findings show how evolution can produce diverse outcomes, even among systems with apparently similar environmental and ecological conditions.en_US
dc.language.isoengen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.subjectSalvelinus alpinusen_US
dc.subjectPolymorphismen_US
dc.subjectGenetic differencesen_US
dc.subjectTrophic niche divergenceen_US
dc.subjectStomach contentsen_US
dc.subjectStable isotope analysesen_US
dc.subjectTrophically transmitted parasitesen_US
dc.titleContrasting patterns in trophic niche evolution of polymorphic Arctic charr populations in two subarctic Norwegian lakesen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.subject.nsiVDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920en_US
dc.source.pagenumber281-299en_US
dc.source.volume840en_US
dc.source.journalHydrobiologiaen_US
dc.source.issue1en_US
dc.identifier.doi10.1007/s10750-019-3969-9
dc.identifier.cristin1708577
cristin.unitcode209,2,3,0
cristin.unitnameInstitutt for skog- og utmarksfag
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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