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dc.contributor.advisorKnudsen, Rune
dc.contributor.advisorAmundsen, Per-Arne
dc.contributor.authorSmalås, Aslak
dc.date.accessioned2013-11-12T12:46:31Z
dc.date.available2013-11-12T12:46:31Z
dc.date.issued2013-05-15
dc.description.abstractPolymorphisms are widespread throughout many different taxa of vertebrates. Discrete polymorphisms or morphs usually differentiate in morphology, ecology and life history, most likely driven by adaptations to different habitats and resources. For sympatric morphs to be able to maximize fitness in different niches and habitats, they may develop differences in several life history traits. Arctic charr (Salvelinus alpinus (L.)) is a good model species for verifying and understanding ecological driven polymorphism and speciation. Here, I address the life history traits of three sympatric living Arctic charr morphs in Skogsfjordvatn in northern Norway. The charr morphs differ in diet and habitat utilization; including one morph that feeds on benthic invertebrates and zooplankton in the littoral-pelagic zone (referred to as the LO-morph), a second that feeds on chironomids and small mussels in the profundal zone (PB-morph), and a third that also inhabits the profundal zone, but has a piscivorous diet (PP-morph). The littoral and the two profundal spawning morphs are differentiated in time and place of spawning and all morphs are genetically differentiated, indicating complete reproductive isolation. These morphs also had contrasting differences in numerous life history traits.en
dc.identifier.urihttps://hdl.handle.net/10037/5495
dc.identifier.urnURN:NBN:no-uit_munin_5198
dc.language.isoengen
dc.publisherUniversitetet i Tromsøen
dc.publisherUniversity of Tromsøen
dc.rights.accessRightsopenAccess
dc.rights.holderCopyright 2013 The Author(s)
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/3.0en_US
dc.rightsAttribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)en_US
dc.subject.courseIDBIO-3910en
dc.subjectlife history traitsen
dc.subjectArctic charren
dc.subjectSkogsfjordvatnen
dc.subjectPolymorphismen
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488en
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488en
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Limnology: 498en
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Limnologi: 498en
dc.titleLife history strategies of a trimorphic population of Arctic charr (Salvelinus alpinus (L.)) in Skogsfjordvatn, northern-Norwayen
dc.typeMaster thesisen
dc.typeMastergradsoppgaveen


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Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)
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