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dc.contributor.authorCasas-Mulet, Roser
dc.contributor.authorAlfredsen, Knut
dc.contributor.authorBrabrand, Åge
dc.contributor.authorSaltveit, Svein Jakob
dc.date.accessioned2018-01-31T14:15:37Z
dc.date.available2018-01-31T14:15:37Z
dc.date.created2016-02-04T07:40:54Z
dc.date.issued2016
dc.identifier.citationFisheries Management and Ecology. 2016, 23 (2), 144-151.nb_NO
dc.identifier.issn0969-997X
dc.identifier.urihttp://hdl.handle.net/11250/2481052
dc.description.abstractDuring their early life stages (egg maturation, hatching, alevin development), between late autumn and early spring, young Atlantic salmon are exposed to surface-groundwater interactions in the hyporheic zone and may depend on influx of subsurface water during periods of regulated low discharge for survival. Two studies, one in a seasonally regulated river and one in a river exposed to hydropeaking, displayed unexpectedly high survival of eggs in surface de-watered areas because of the influx of oxygen-rich subsurface water. Field observations of newly hatched alevins in these two rivers showed them to be more sensitive (i.e. suffered higher mortality from) to surface de-watering than were eggs. Exposure to dry conditions in drawdown areas was highlighted as the main cause for alevin mortality. Therefore, shorter periods of surface de-watering in the river with hydropeaking resulted in higher alevin survival than the seasonally regulated river when still permanently drained after egg hatching. Greater consideration should be given to all early life-history stages when implementing discharge release strategies, and the extent of groundwater influence and the potential for flexible hydropower operations should be taken into account.nb_NO
dc.language.isoengnb_NO
dc.publisherWileynb_NO
dc.titleHydropower operations in groundwater-influenced rivers: implications for Atlantic salmon, Salmo salar, early life stage development and survivalnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber144-151nb_NO
dc.source.volume23nb_NO
dc.source.journalFisheries Management and Ecologynb_NO
dc.source.issue2nb_NO
dc.identifier.doi10.1111/fme.12165
dc.identifier.cristin1331781
dc.relation.projectNorges forskningsråd: 193818nb_NO
dc.description.localcodeThis is the peer reviewed version of the following article: [Hydropower operations in groundwater-influenced rivers: implications for Atlantic salmon, Salmo salar, early life stage development and survival], which has been published in final form at [http://onlinelibrary.wiley.com/doi/10.1111/fme.12165/abstract]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.nb_NO
cristin.unitcode194,64,91,0
cristin.unitnameInstitutt for bygg- og miljøteknikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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