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dc.contributor.authorBaktoft, Henrik
dc.contributor.authorGjelland, Karl Øystein
dc.contributor.authorSzabo-Meszaros, Marcell
dc.contributor.authorSilva, Ana T.
dc.contributor.authorRiha, Milan
dc.contributor.authorØkland, Finn
dc.contributor.authorAlfredsen, Knut
dc.contributor.authorForseth, Torbjørn
dc.date.accessioned2020-09-11T11:57:36Z
dc.date.available2020-09-11T11:57:36Z
dc.date.created2020-09-07T18:01:47Z
dc.date.issued2020
dc.identifier.issn2071-1050
dc.identifier.urihttps://hdl.handle.net/11250/2677425
dc.description.abstractRepeat spawners constitute an important component of Atlantic salmon populations, but survival of post-spawning individuals (kelts) are often compromised by anthropogenic structures such as hydropower plants (HPPs). Potential effects of HPPs include migration delays and associated increased energy depletion, which potentially results in increased overall mortality. We combined a detailed 3D hydraulic model with high-resolution 3D tracking of tagged kelts (length 73–104 cm) to obtain estimates of kelt movement through water. These estimates were then used in an energetics model to estimate hourly energy expenditure while negotiating the HPP area. Hourly kelt energy expenditure varied between 0.8 and 10.1 kJ × h−1 and was dependent on kelt length. Degree of additional energy depletion can amount to several percent of remaining energy content (our study indicates 4–5 percentage points) potentially leading to reduced post-spawning survival. In turn, this can nullify the iteroparous breeding strategy and jeopardize long-term stability and persistence of Atlantic salmon populations inhabiting HPP rivers.en_US
dc.language.isoengen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.subjecthigh-resolution 3D telemetryen_US
dc.subject3D hydraulic modelingen_US
dc.subjectanthropogenic structuresen_US
dc.subjectriver connectivityen_US
dc.subjectenergetics modelen_US
dc.subjectenergy expenditureen_US
dc.titleCan Energy Depletion of Wild Atlantic Salmon Kelts Negotiating Hydropower Facilities Lead to Reduced Survival?en_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.rights.holder© 2020 by the Authorsen_US
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.source.volume12en_US
dc.source.journalSustainabilityen_US
dc.source.issue18en_US
dc.identifier.doihttps://doi.org/10.3390/su12187341
dc.identifier.cristin1827896
dc.relation.projectNorges forskningsråd: 244022en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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