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dc.contributor.authorBøhn, Thomas
dc.contributor.authorAmundsen, Per-Arne
dc.date.accessioned2019-03-11T08:26:02Z
dc.date.available2019-03-11T08:26:02Z
dc.date.issued2004-02-26
dc.description.abstractPopulation biology changes in native dimorphic whitefish <i>Coregonus lavaretus</i> were studied over a decade in the subarctic Pasvik watercourse, where large biotric changes occurred due to an invasion by vendace <i> C. albula</i>. Although initially recorded in the upstream part of the watercourse, where it is now the dominant pelagic species, the vendace subsequently also colonised the downstream area. We hypothesized that the impact of the invader would affect the population biology (density, habitat choice, growth, size- and age-structure and size and age at maturation) of the native whitefish populations, especially upstream in the watercourse, late in the invasion phase, and in the pelagic whitefish morph. Strong effects from the invading vendace were observed on the native dimorphic whitefish populations. Effects on the densely-rakered white-fish, which are ecologically similar to vendace, ranged from numerical responses (strong density decline in the population), habitat use (shift from pelagic to littoral) and indivudual growth (significant growth reduction in zooplanktivorous life stages). For the benthic sparsely-rakered whitefish, effects were more restricted and recorded mainly on growth.en_US
dc.description.sponsorshipThe Norwegian Research Council The Directorate for Nature Management The Governor of Finnmark Countyen_US
dc.descriptionSource at <a href=https://www.jstor.org/publisher/fzb> https://www.jstor.org/publisher/fzb</a>.en_US
dc.identifier.citationBøhn, T. & Amundsen, P. (2004). Invasion-mediated changes in the population biology of a dimorphic whitefish <i>Coregonus lavaretus</i> population. <i>Annales Zoologici Fennici, 41</i>, 125-136.en_US
dc.identifier.cristinIDFRIDAID 418786
dc.identifier.issn0003-455X
dc.identifier.issn1797-2450
dc.identifier.urihttps://hdl.handle.net/10037/14924
dc.language.isoengen_US
dc.publisherFinnish Zoological and Botanical Publishing Boarden_US
dc.relation.journalAnnales Zoologici Fennici
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920en_US
dc.subjectVDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920en_US
dc.titleInvasion-mediated changes in the population biology of a dimorphic whitefish Coregonus lavaretus populationen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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