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dc.contributor.authorWollebæk, Jens
dc.contributor.authorHeggenes, Jan
dc.contributor.authorRøed, Knut H.
dc.identifier.citationEcology and Evolution. 2018, 8 (5), 2729-2745.nb_NO
dc.description.abstractEcotype variation in species exhibiting different life history strategies may reflect heritable adaptations to optimize reproductive success, and potential for speciation.Traditionally, ecotypes have, however, been defined by morphometrics and life history characteristics, which may be confounded with individual plasticity. Here, we use the widely distributed and polytypic freshwater fish species brown trout (Salmo trutta) as a model to study piscivorous life history and its genetic characteristics in environmentally contrasting habitats; a large lake ecosystem with one major large and stable tributary,and several small tributaries. Data from 550 fish and 13 polymorphic microsatellites (He = 0.67) indicated ecotype-specific genetic differentiation (θ = 0.0170, p < .0001) among Bayesian assigned small riverine resident and large, lake migrating brown trout (>35 cm), but only in the large tributary. In contrast, large trout did not constitute a distinct genetic group in small tributaries, or across riverine sites. Whereas life history data suggest a small, river resident and a large migratory piscivorous ecotype in all studied tributaries, genetic data indicated that a genetically distinct piscivorous ecotype is more likely to evolve in the large and relatively more stable river habitat. In the smaller tributaries, ecotypes apparently resulted from individual plasticity.Whether different life histories and ecotypes result from individual lasticity or define different genetic types, have important consequence for conservation strategies.nb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleLife histories and ecotype conservation in an adaptive vertebrate: Genetic constitution of piscivorous brown trout covaries with habitat stabilitynb_NO
dc.title.alternativeLife histories and ecotype conservation in an adaptive vertebrate: Genetic constitution of piscivorous brown trout covaries with habitat stabilitynb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.rights.holder© 2018 The Authors.nb_NO
dc.source.journalEcology and Evolutionnb_NO
cristin.unitnameInstitutt for natur, helse og miljø

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