Browsing AURA by Author "Knutsen, Halvor"
Now showing items 21-40 of 62
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Evidence of hybridization between genetically distinct Baltic cod stocks during peak population abundance(s)
Helmerson, Cecilia; Weist, Peggy; Brieuc, Marine Servane Ono; Maurstad, Marius Filomeno; Schade, Franziska Maria; Dierking, Jan; Petereit, Christoph; Knutsen, Halvor; Metcalfe, Julian; Righton, David; André, Carl; Krumme, Uwe; Jentoft, Sissel; Hanel, Reinhold (Peer reviewed; Journal article, 2023)Range expansions can lead to increased contact of divergent populations, thus increasing the potential of hybridization events. Whether viable hybrids are produced will most likely depend on the level of genomic divergence ... -
Evidence of hybridization between genetically distinct Baltic cod stocks during peak population abundance(s)
Helmerson, Cecilia; Weist, Peggy; Brieuc, Marine Servane Ono; Maurstad, Marius Filomeno; Schade, Franziska Maria; Dierking, Jan; Petereit, Christoph; Knutsen, Halvor; Metcalfe, Julian; Righton, David; André, Carl; Krumme, Uwe; Jentoft, Sissel; Hanel, Reinhold (Peer reviewed; Journal article, 2023)Range expansions can lead to increased contact of divergent populations, thus increasing the potential of hybridization events. Whether viable hybrids are produced will most likely depend on the level of genomic divergence ... -
Fine-Scale Population Differences in Atlantic Cod Reproductive Success: A Potential Mechanism for Ecological Speciation in a Marine Fish
Roney, Nancy; Oomen, Rebekah Alice; Knutsen, Halvor; Olsen, Esben Moland; Hutchings, Jeffrey (Journal article; Peer reviewed, 2018) -
Fine-scale population dynamics in a marine fish species inferred from dynamic state-space models
Rogers, Lauren; Storvik, Geir Olve; Knutsen, Halvor; Olsen, Esben Moland; Stenseth, Nils Christian (Journal article; Peer reviewed, 2017)Identifying the spatial scale of population structuring is critical for the conservation of natural populations and for drawing accurate ecological inferences. However, population studies often use spatially aggregated ... -
Genetic analysis of goldsinny wrasse reveals evolutionary insights into population connectivity and potentialevidence of inadverent translocationvia aquaculture.
Jansson, Eeva; Sanchez, Maria Quintela; Dahle, Geir; Albretsen, Jon; Knutsen, Halvor; André, Carl; Strand, Åsa; Mortensen, Stein; Taggart, John B.; Karlsbakk, Egil; Kvamme, Bjørn Olav; Glover, Kevin (Journal article; Peer reviewed, 2017)The salmon industry is heavily dependent on wrasse for delousing infected fish. The goldsinny wrasse is numerically the most important, and each year, millions are harvested from the wild and transported large distances ... -
Genetic structuring in Atlantic haddock contrasts with current management regimes
Berg, Paul Ragnar; Jorde, Per Erik; Glover, Kevin; Dahle, Geir; Taggart, John B.; Korsbrekke, Knut; Dingsør, Gjert E.; Skjæraasen, Jon Egil; Wright, Peter J.; Cadrin, Steven X.; Knutsen, Halvor; Westgaard, Jon-Ivar (Peer reviewed; Journal article, 2020)The advent of novel genetic methods has made it possible to investigate population structure and connectivity in mobile marine fish species: knowledge of which is essential to ensure a sustainable fishery. Haddock ... -
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) -
Habitat discontinuities separate genetically divergent populations of a rocky shore marine fish
Blanco Gonzalez, Enrique; Knutsen, Halvor; Jorde, Per Erik (Journal article; Peer reviewed, 2016) -
Habitat effects on population connectivity in a coastal seascape
Rogers, Lauren A; Olsen, Esben Moland; Knutsen, Halvor; Stenseth, Nils Chr. (Journal article; Peer reviewed, 2014)Knowing how population connectivity varies across heterogeneous habitats can provide insight into the mechanisms underlying population structuring, and ultimately help to inform conservation and management actions. We ... -
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) -
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) -
Impact of harvesting cleaner fish for salmonid aquaculture assessed from replicated coastal marine protected areas
Halvorsen, Kim Aleksander Tallaksen; Larsen, Torkel; Sørdalen, Tonje Knutsen; Vøllestad, Leif Asbjørn; Knutsen, Halvor; Olsen, Esben Moland (Journal article; Peer reviewed, 2017) -
In deep water: Long-term trends in demersal fish diversity in Skagerrak and the Norwegian trench
Paulsen, Aina (Master thesis, 2023)Throughout history, human activities have had profound impacts on marine ecosystems, with clear evidence of these consequences observable in the Skagerrak region. Oceans have historically been a critical resource for ... -
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) -
"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) -
Isolation and characterization of nuclear microsatellite loci in the northern shrimp, Pandalus borealis
Pereyra, Ricardo T.; Westgaard, Jon-Ivar; Dahl, Mikael; Johansen, Torild; Knutsen, Halvor; Ring, Anna-Karin; Søvik, Guldborg; André, Carl (Journal article; Peer reviewed, 2012)We developed and characterized 20 microsatellite primer loci for the northern shrimp Pandalus borealis. All 20 loci were polymorphic with number of alleles ranging from 3 to 36 and with observed heterozygosity between 0.04 ... -
Isolation and characterization of twenty microsatellite loci for the ballan wrasse, Labrus bergylta
Quintela, María; Danielsen, Elin Annie; Svåsand, Terje; Knutsen, Halvor; Skiftesvik, Anne Berit; Glover, Kevin A. (Journal article; Peer reviewed, 2014)We developed 20 nuclear microsatellite DNA markers from tri- and tetra-nucleotide enriched libraries in the ballan wrasse. In our dataset (N = 241), the detected number of alleles per locus ranged from 2 to 12, and the ... -
Lobster and cod benefit from small-scale northern marine protected areas : inference from an empirical before - after control-impact study
Moland, Even; Olsen, Esben Moland; Knutsen, Halvor; Garrigou, Pauline; Espeland, Sigurd Heiberg; Kleiven, Alf Ring; André, Carl; Knutsen, Jan Atle (Journal article; Peer reviewed, 2013)Marine protected areas (MPAs) are increasingly implemented as tools to conserve and manage fisheries and target species. Because there are opportunity costs to conservation, there is a need for science-based assessment of ...