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dc.contributor.authorDiserud, Ola Håvard
dc.contributor.authorHedger, Richard David
dc.contributor.authorFinstad, Bengt
dc.contributor.authorHendrichsen, Ditte Katrine
dc.contributor.authorJensen, Arne Johan
dc.contributor.authorUgedal, Ola
dc.identifier.citationAquaculture Environment Interactions. 2020, 12 447-456.en_US
dc.description.abstractFor successful evaluation of the overall effects of salmon louse infestation on brown trout population dynamics, it is crucial to have a realistic understanding of how lice infestation distributions are generated and how they should be interpreted. Here, we simulated the potential effects of spatio-temporal variance in lice larvae densities, temporal variance in sea trout marine migration timing and spatial variance in marine habitat use on lice infestation distributions. We show that, when sampling populations with individual variation in marine behaviour, e.g. from post-smolts to veteran migrants, we must expect multi-modal mixture lice infestation distributions. Applying standard statistical distributions, such as the Poisson, negative binomial or zeroinflated distributions, can be too simplistic and give biased results. Temporary increases in salmon lice load in a given area may have inconsistent effects among individuals of a population and may be critical for vulnerable groups such as post-smolts, dependent on timing. For many analyses, it will be necessary to resolve the contributions from groups of fish with different lice infestation expectations due to spatio-temporal differences in habitat use within the overall mixture distribution. Another consequence is that different data sources, obtained by different methods or sampled at different locations and periods, must be expected to give different lice infestation distributions, even when sampling the same population. We also discuss additional factors that may complicate the interpretation of salmon lice infestation distributions on sea trout, such as lice-induced mortality, and behavioural changes, such as premature return to less saline water for delousing. Salmo trutta · Lepeophtheirus salmonis · Anadromy · Marine migration · Aquaculture · Negative binomial distribution · Zero-inflated modelsen_US
dc.publisherInter Researchen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleSalmon louse infestation in wild brown trout populations generates multi-modal mixture distributionsen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.subject.nsiVDP::Zoologiske og botaniske fag: 480en_US
dc.subject.nsiVDP::Zoology and botany: 480en_US
dc.source.journalAquaculture Environment Interactionsen_US
dc.relation.projectAndre: Environment Agency of Norwayen_US
dc.relation.projectAndre: Ministry of Trade, Industry and Fisheriesen_US
dc.relation.projectEgen institusjon: Norwegian institute for nature research (NINA)en_US
dc.description.localcode© The authors 2020. Open Access under Creative Commons by Attribution Licence. Use, distribution and reproduction are un - restricted. Authors and original publication must be credited.en_US

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