Blar i Brage IMR på forfatter "Knutsen, Halvor"
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Genome architecture enables local adaptation of Atlantic cod despite high connectivity
Barth, Julia Maria Isis; Berg, Paul Ragnar; Jonsson, Per R; Bonanomi, Sara; Corell, Hanna; Hemmer-Hansen, Jakob; Jakobsen, Kjetill Sigurd; Johannesson, Kerstin; Jorde, Per Erik; Knutsen, Halvor; Moksnes, Per-Olav; Star, Bastiaan; Stenseth, Nils Christian; Svedang, Henrik; Jentoft, Sissel; Andre, Carl (Journal article; Peer reviewed, 2017)Adaptation to local conditions is a fundamental process in evolution; however, mechanisms maintaining local adaptation despite high gene flow are still poorly understood. Marine ecosystems provide a wide array of diverse ... -
Genotype Reconstruction of Paternity in European Lobsters (Homarus gammarus)
Ellis, Charlie; Hodgson, DJ; Andre, Carl; Sørdalen, Tonje Knutsen; Knutsen, Halvor; Griffiths, Amber (Peer reviewed; Journal article, 2015) -
Geographic variation in gene flow from a genetically distinct migratory ecotype drives population genetic structure of coastal Atlantic cod (Gadus morhua L.)
Seliussen, Bjørghild Breistein; Dahle, Geir; Johansen, Torild; Besnier, Francois; Quintela, Maria; Jorde, Per Erik; Knutsen, Halvor; Westgaard, Jon-Ivar; Nedreaas, Kjell Harald; Farestveit, Eva; Glover, Kevin Alan (Peer reviewed; Journal article, 2022)Identifying how physical and biotic factors shape genetic connectivity among populations in time and space is essential to our understanding of the evolutionary trajectory as well as the management of marine species. ... -
Geographic variation in gene-flow from a genetically distinct migratory ecotype drives population genetic structure of coastal Atlantic cod (Gadus morhua L.)
Seliussen, Bjørghild Breistein; Dahle, Geir; Johansen, Torild; Besnier, Francois; Sanchez, Maria Quintela; Jorde, Per Erik; Knutsen, Halvor; Westgaard, Jon-Ivar; Nedreaas, Kjell; Farestveit, Eva; Glover, Kevin (Dataset, 2022)This is the final dataset used in the Breistein et al. (in review) study “Geographic variation in gene-flow from a genetically distinct migratory ecotype drives population genetic structure of coastal Atlantic cod (Gadus ... -
Habitat discontinuities separate genetically divergent populations of a rocky shore marine fish
Blanco Gonzalez, Enrique; Knutsen, Halvor; Jorde, Per Erik (Journal article, 2016) -
Harvest pressure on coastal atlantic cod (Gadus morhua) from recreational fishing relative to commercial fishing assessed from tag-recovery data
Kleiven, Alf Ring; Chacon, Albert Fernandez; Nordahl, Jan-Harald; Moland, Even; Espeland, Sigurd Heiberg; Knutsen, Halvor; Olsen, Esben Moland (Journal article; Peer reviewed, 2016-03-09)Marine recreational fishing is a popular outdoor activity. However, knowledge about the magnitude of recreational catches relative to commercial catches in coastal fisheries is generally sparse. Coastal Atlantic cod (Gadus ... -
Harvesting changes mating behaviour in European lobster
Sørdalen, Tonje Knutsen; Halvorsen, Kim Aleksander Tallaksen; Harrison, Hugo B.; Ellis, Charlie D.; Vøllestad, Leif Asbjørn; Knutsen, Halvor; Moland, Even; Olsen, Esben Moland (Journal article; Peer reviewed, 2018)Removing individuals from a wild population can affect the availability of prospective mates and the outcome of competitive interactions, with subsequent effects on mating patterns and sexual selection. Consequently, the ... -
Highly mixed impacts of near-future climate change on stock productivity proxies in the North East Atlantic
Kjesbu, Olav Sigurd; Sundby, Svein; Sandø, Anne Britt; Alix, Maud; Hjøllo, Solfrid Sætre; Tiedemann, Maik; Skern-Mauritzen, Mette; Junge, Claudia; Fossheim, Maria; Broms, Cecilie; Søvik, Guldborg; Zimmermann, Fabian; Nedreaas, Kjell Harald; Eriksen, Elena; Höffle, Hannes; Hjelset, Ann Merete; Kvamme, Cecilie; Reecht, Yves; Knutsen, Halvor; Aglen, Asgeir; Albert, Ole Thomas; Berg, Erik; Bogstad, Bjarte; Durif, Caroline; Halvorsen, Kim Aleksander Tallaksen; Høines, Åge Sigurd; Hvingel, Carsten; Johannesen, Edda; Johnsen, Espen; Moland, Even; Myksvoll, Mari Skuggedal; Nøttestad, Leif; Olsen, Erik Joel Steinar; Skaret, Georg; Skjæraasen, Jon Egil; Slotte, Aril; Staby, Arved; Stenevik, Erling Kåre; Stiansen, Jan Erik; Stiasny, Martina H.; Sundet, Jan Henry; Vikebø, Frode Bendiksen; Huse, Geir (Peer reviewed; Journal article, 2021)Impacts of climate change on ocean productivity sustaining world fisheries are predominantly negative but vary greatly among regions. We assessed how 39 fisheries resources—ranging from data-poor to data-rich stocks—in the ... -
Inferring genetic connectivity in real populations, exemplified by coastal and oceanic atlantic cod
Spies, Ingrid; Hauser, Lorenz; Jorde, Per Erik; Knutsen, Halvor; Punt, André E.; Rogers, Lauren; Stenseth, Nils Christian (Journal article; Peer reviewed, 2018)Genetic data are commonly used to estimate connectivity between putative populations, but translating them to demographic dispersal rates is complicated. Theoretical equations that infer a migration rate based on the genetic ... -
Inferring genetic connectivity in real populations, exemplified by coastal and oceanic Atlantic cod
Spies, Ingrid; Hauser, Lorenz; Jorde, Per Erik; Knutsen, Halvor; Punt, André E.; Rogers, Lauren; Stenseth, Nils Christian (Journal article; Peer reviewed, 2018)Genetic data are commonly used to estimate connectivity between putative populations, but translating them to demographic dispersal rates is complicated. Theoretical equations that infer a migration rate based on the genetic ... -
"Islands of divergence" in the Atlantic cod genome represent polymorphic chromosomal rearrangements
Sodeland, Marte; Jorde, Per Erik; Lien, Sigbjørn; Jentoft, Sissel; Berg, Paul Ragnar; Grove, Harald; Kent, Matthew Peter; Arnyasi, Mariann; Olsen, Esben Moland; Knutsen, Halvor (Peer reviewed; Journal article, 2016) -
"Islands of divergence" in the Atlantic cod genome represent polymorphic chromosomal rearrangements
Sodeland, Marte; Jorde, Per Erik; Lien, Sigbjørn; Jentoft, Sissel; Berg, Paul Ragnar; Grove, Harald; Kent, Matthew Peter; Arnyasi, Mariann; Olsen, Esben Moland; Knutsen, Halvor (Journal article; Peer reviewed, 2016-03-15)In several species genetic differentiation across environmental gradients or between geographically separate populations has been reported to center at “genomic islands of divergence,” resulting in heterogeneous differentiation ... -
Krafttak for kysttorsken - Kunnskap for stedstilpasset gjenoppbygging av bestander, naturtyper og økosystem i Færder- og Ytre Hvaler nasjonalparker
Moland, Even; Synnes, Ann-Elin; Naustvoll, Lars Johan; Freitas, Carla; Norderhaug, Kjell Magnus; Thormar, Jonas; Biuw, Martin; Jorde, Per Erik; Knutsen, Halvor; Dahle, Geir; Jelmert, Anders; Bosgraaf, Sebastian; Olsen, Esben Moland; Deininger, Anne; Haga, Atle (Rapport fra havforskningen;2021 - 2, Research report, 2021)Ytre Oslofjord har en unik kystnatur av svært stor verdi for både fastboende og tilreisende. Færder- og Ytre Hvaler nasjonalparker ligger side om side ytterst i fjorden, og skal sikre naturverdiene for kommende generasjoner. ... -
Kunnskapsstatus leppefisk : Utfordringer i et økende fiskeri
Espeland, Sigurd Heiberg; Nedreaas, Kjell Harald; Mortensen, Stein H.; Skiftesvik, Anne Berit; Agnalt, Ann-Lisbeth; Durif, Caroline M.F.; Harkestad, Lisbeth S.; Karlsbakk, Egil; Knutsen, Halvor; Thangstad, Trond; Jørstad, Knut Eirik; Bjordal, Åsmund; Gjøsæter, Jakob (Fisken og havet;7-2010, Research report, 2010-11-15)Over the past few years there has been a rapid increase in the use of wrasses as cleanerfish for sealice on salmon farms. During 2010, the landed catch of wrasse was 440 tons, more than twice the 2009 catch and nearly ten ... -
Kysttorsk: Genetiske analyser påviser lokale bestander
Knutsen, Halvor; Jorde, Per Erik; Stenseth, Nils Christian (Havforskningsnytt, Working paper, 2002) -
Kysttorskens egg blir i fjordene
Knutsen, Halvor (Havforskningsnytt, Working paper, 2006) -
Kysttorskforvaltning på Vestlandet og langs Skagerrakkysten : Vurdering av status for kysttorsk på strekningen svenskegrensen–Stad med forslag om forvaltningstiltak
Nedreaas, Kjell Harald; Aglen, Asgeir; Gjøsæter, Harald; Jørstad, Knut Eirik; Knutsen, Halvor; Smedstad, Odd M.; Svåsand, Terje; Ågotnes, Per (Fisken og havet, Research report, 2008)Sammendrag (norsk): Rapporten oppsummerer vår kunnskap om kysttorsk på kysten av Vestlandet og Skagerrak, diskuterer mangler ved denne, forsøker å kvantifisere ulike påvirkningsfaktorer og foreslår nødvendige forvaltningstiltak. ... -
Lobster reserves as a management tool in coastal waters: Two decades of experience in Norway
Knutsen, Jan Atle; Kleiven, Alf Ring; Olsen, Esben Moland; Knutsen, Halvor; Espeland, Sigurd Heiberg; Sørdalen, Tonje Knutsen; Thorbjørnsen, Susanna Huneide; Hutchings, Jeffrey; Chacon, Albert Fernandez; Huserbråten, Mats Brockstedt Olsen; Villegas-Ríos, David; Halvorsen, Kim Aleksander Tallaksen; Kleiven, Portia Joy Nillos; Langeland, Thomas Kiland; Moland, Even (Peer reviewed; Journal article, 2022)The positive effects of reduced fishing pressure in marine protected areas (MPAs) are now well documented globally. Yet, evidence of MPA benefits from long-term replicated before-after control-impact (BACI) studies and ... -
Local cod (Gadus morhua) revealed by egg surveys and population genetic analysis after longstanding depletion on the Swedish Skagerrak coast
Svedang, Hendrik; Barth, Julia Maria Isis; Svenson, Anders; Jonsson, Patrik; Jentoft, Sissel; Knutsen, Halvor; Andre, Carl (Journal article; Peer reviewed, 2018)Dramatic and persistent reductions in Atlantic cod (Gadus morhua) are common in many coastal areas. While offshore cod stocks still were abundant and productive, the Swedish west coast showed signs of diminishing adult cod ... -
Local recruitment of Atlantic cod and putative source spawning areas in a coastal seascape
Synnes, Ann-Elin; Huserbråten, Mats Brockstedt Olsen; Knutsen, Halvor; Jorde, Per Erik; Sodeland, Marte; Moland, Even (Peer reviewed; Journal article, 2021)Increased knowledge on connectivity is crucial to our understanding of the population dynamics, genetic structure, and biogeography of many coastal species. In coastal marine populations, the main factor for structuring ...