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dc.contributor.authorStrand, Kjersti Opstad
dc.contributor.authorSundby, Svein
dc.contributor.authorAlbretsen, Jon
dc.contributor.authorVikebø, Frode Bendiksen
dc.PublishedStrand KO, Sundby S, Albretsen J, Vikebø FB. The Northeast Greenland shelf as a potential habitat for the Northeast Arctic cod. Frontiers in Marine Science. 2017;4:304eng
dc.description.abstractObservations (1978–1991) of distributions of pelagic juvenile Northeast Arctic cod (Gadus morhua L.) show that up to 1/3 of the year class are dispersed off the continental shelf and into the deep Norwegian Sea while on the way from the spring-spawning areas along the Norwegian coast to the autumn-settlement areas in the Barents Sea. The fate of this variable fraction of pelagic juveniles off-shelf has been an open question ever since Johan Hjort's (1914) seminal work. We have examined both the mechanisms causing offspring off-shelf transport, and their subsequent destiny using an individual-based biophysical model applied to quantify growth and dispersal. Our results show, consistently with the observations, that total off-shelf transport is highly variable between years and may be up to 27.4%. Offspring from spawning grounds around Lofoten have a higher chance of being displaced off the shelf. The off-shelf transport is dominated by episodic events where frequencies and dates vary between years. Northeasterly wind conditions over a 3–7-day period prior to the off-shelf events are a good proxy for dispersal of offspring off the shelf. Offspring transported into the open ocean are on average carried along three following routes: back onto the adjacent eastern shelves and into the Barents Sea (36.9%), recirculating within the Lofoten Basin (60.7%), or drifting northwest to the northeast Greenland shelf (2.4%). For the latter fraction the transport may exceed 12% depending on year. Recent investigations have discovered distributions of young cod on the northeast Greenland shelf indicating that conditions may support survival for Northeast Arctic cod offspring.en_US
dc.rightsAttribution CC BYeng
dc.subjectpelagic juvenileeng
dc.subjectspawning groundeng
dc.subjectnursery groundeng
dc.subjectnortheast arctic codeng
dc.titleThe Northeast Greenland shelf as a potential habitat for the Northeast Arctic coden_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright 2017 The Author(s)en_US
dc.source.journalFrontiers in Marine Science
dc.relation.projectNorges forskningsråd: 244262

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