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dc.contributor.authorHavn, Torgeir Børresen
dc.contributor.authorThorstad, Eva Bonsak
dc.contributor.authorBorcherding, Jost
dc.contributor.authorHeermann, Lisa
dc.contributor.authorTeichert, Maxim A. K.
dc.contributor.authorIngendahl, Detlev
dc.contributor.authorTambets, Meelis
dc.contributor.authorSæther, Stein Are
dc.contributor.authorØkland, Finn
dc.description.abstractWeirs are barriers built across rivers for a wide range of other purposes than hydropower production. Like hydropower installations, weirs can negatively impact fish migrations. Downstream migration and mortality of Atlantic salmon smolts were studied during passage of a weir and power station by tagging 227 smolts with radio transmitters. Extra loss of smolts due to the weir and adjacent reservoir was 5.2%. Mortality was likely related to physical damage imposed to the smolts and/or increased predation risk. Extra loss of smolts did not differ between the weir and the power station (7.2%). Migration speeds were reduced at the power station but not at the weir. We conclude that mortality at one power station site may differ considerably among years, because the mortality was more than four times higher in a previous year than in this study. Increased river discharge seemed to decrease mortality and increase migration speeds at the power station.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.subjectdownstream migrationen_US
dc.subjectmigration speeden_US
dc.subjectpower stationen_US
dc.subjectradio telemetryen_US
dc.subjectsalmon smolten_US
dc.titleImpacts of a weir and power station on downstream migrating Atlantic salmon smolts in a German riveren_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© 2020 The Authors.en_US
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.source.journalRivers Research and Applications: an international journal devoted to river research and managementen_US

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