Blar i Brage IMR på forfatter "Jorde, Per Erik"
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Are low but statistically significant levels of genetic differentiation in marine fishes ‘biologically meaningful’? A case study of coastal Atlantic cod
Knutsen, Halvor; Olsen, Esben Moland; Jorde, Per Erik; Espeland, Sigurd Heiberg; André, Carl (Journal article; Peer reviewed, 2010-12-29)A key question in many genetic studies on marine organisms is how to interpret a low but statistically significant level of genetic differentiation. Do such observations reflect a real phenomenon, or are they caused by ... -
Are low but statistically significant levels of genetic differentiation in marine fishes ‘biologically meaningful’? A case study of coastal Atlantic cod
Knutsen, Halvor; Olsen, Esben Moland; Jorde, Per Erik; Espeland, Sigurd Heiberg; André, Carl (Journal article; Peer reviewed, 2010-12-29)A key question in many genetic studies on marine organisms is how to interpret a low but statistically significant level of genetic differentiation. Do such observations reflect a real phenomenon, or are they caused by ... -
Are we underestimating the occurrence of sympatric populations?
Jorde, Per Erik; Andersson, Anastasia; Ryman, Nils; Laikre, Linda (Journal article; Peer reviewed, 2018)Sympatric populations are conspecific populations that coexist spatially. They are of interest in evolutionary biology by representing the potential first steps of sympatric speciation and are important to identify and ... -
Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod
Jorde, Per Erik; Synnes, Ann-Elin; Espeland, Sigurd Heiberg; Sodeland, Marte; Knutsen, Halvor (Journal article; Peer reviewed, 2018)The use of genetic markers under putative selection in population studies carries the potential for erroneous identification of populations and misassignment of individuals to population of origin. Selected markers are ... -
Climate Change and Genetic Structure of Leading Edge and Rear End Populations in a Northwards Shifting Marine Fish Species, the Corkwing Wrasse (Symphodus melops)
Knutsen, Halvor; Jorde, Per Erik; Gonzalez, Enrique Blanco; Robalo, Joana; Albretsen, Jon; Almada, Vitor (Journal article; Peer reviewed, 2013-06-26)One mechanism by which marine organisms may respond to climate shifts is range shifts. The corkwing wrasse (Symphodus melops) is a temperate fish species, inhabiting the coasts of Europe, that show strong indications of ... -
Climate Change and Genetic Structure of Leading Edge and Rear End Populations in a Northwards Shifting Marine Fish Species, the Corkwing Wrasse (Symphodus melops)
Knutsen, Halvor; Jorde, Per Erik; Blanco Gonzalez, Enrique; Robalo, Joana I.; Albretsen, Jon; Almada, Vitor C. (Peer reviewed; Journal article, 2013)One mechanism by which marine organisms may respond to climate shifts is range shifts. The corkwing wrasse (Symphodus melops) is a temperate fish species, inhabiting the coasts of Europe, that show strong indications of ... -
Combining population genomics with demographic analyses highlights habitat patchiness and larval dispersal as determinants of connectivity in coastal fish species
Knutsen, Halvor; de Oliveira Catarino, Diana Sofia; Rogers, Lauren; Sodeland, Marte; Mattingsdal, Morten; jahnke, marlene; Hutchings, Jeffrey; Mellerud, Ida Kristin; Espeland, Sigurd Heiberg; Johanneson, Kerstin; Roth, Olivia; Hansen, Michael Møller; Jentoft, Sissel; Andre, Carl; Jorde, Per Erik (Peer reviewed; Journal article, 2022)Gene flow shapes spatial genetic structure and the potential for local adaptation. Among marine animals with nonmigratory adults, the presence or absence of a pelagic larval stage is thought to be a key determinant in ... -
Combining population genomics with demographic analyses highlights habitat patchiness and larval dispersal as determinants of connectivity in coastal fish species
Knutsen, Halvor; de Oliveira Catarino, Diana Sofia; Rogers, Lauren; Sodeland, Marte; Mattingsdal, Morten; jahnke, marlene; Hutchings, Jeffrey; Mellerud, Ida Kristin; Espeland, Sigurd Heiberg; Johanneson, Kerstin; Roth, Olivia; Hansen, Michael Møller; Jentoft, Sissel; Andre, Carl; Jorde, Per Erik (Peer reviewed; Journal article, 2022)Gene flow shapes spatial genetic structure and the potential for local adaptation. Among marine animals with nonmigratory adults, the presence or absence of a pelagic larval stage is thought to be a key determinant in ... -
Contrasting management regimes indicative of mesopredator release in temperate coastal fish assemblages
Synnes, Ann-Elin; Olsen, Esben Moland; Jorde, Per Erik; Knutsen, Halvor; Moland, Even (Peer reviewed; Journal article, 2023)The absence of functional top predators has been proposed as a mechanism acting to shape fish assemblages in temperate marine ecosystems, with cascading effects on lower trophic levels. We explore this scenario by comparing ... -
Demographic history has shaped the strongly differentiated corkwing wrasse populations in Northern Europe.
Mattingsdal, Morten; Jorde, Per Erik; Knutsen, Halvor; Jentoft, Sissel; Stenseth, Nils Christian; Sodeland, Marte; Robalo, Joana I.; Hansen, Michael M.; André, Carl; Gonzalez, Enrique Blanco (Journal article; Peer reviewed, 2019)Understanding the biological processes involved in genetic differentiation and divergence between populations within species is a pivotal aim in evolutionary biology. One particular phenomenon that requires clarification ... -
Genetic analyses verify sexually mature escaped farmed Atlantic cod and farmed cod eggs in the natural environment
Jorde, Per Erik; van der Meeren, Terje; Quintela, Maria; Dahle, Geir; Mateos-Rivera, Alejandro; Aase, Marit; Norberg, Birgitta; Sævik, Pål Næverlid; Bjørn, Pål Arne; Glover, Kevin Alan (Dataset, 2024-03-07)Dataset for "Genetic analyses verify sexually mature escaped farmed Atlantic cod and farmed cod eggs in the natural environment" published in Evolutionary Applications, a Wiley journal. The information consists of an ... -
Genetic differentiation between inshore and offshore populations of northern shrimp (Pandalus borealis)
Hansen, Agneta; Westgaard, Jon-Ivar; Søvik, Guldborg; Hanebrekke, Tanja; Nilssen, Einar Magnus; Jorde, Per Erik; Albretsen, Jon; Johansen, Torild (Dataset, 2021-07-18)This is the dataset used in Hansen et al study " Genetic differentiation between inshore and offshore populations of northern shrimp (Pandalus borealis)", published in ICES Journal of Marine Science. File Contents F1 ... -
Genetic differentiation between inshore and offshore populations of northern shrimp (Pandalus borealis)
Hansen, Agneta; Westgaard, Jon-Ivar; Søvik, Guldborg; Hanebrekke, Tanja Lexau; Nilssen, Einar Magnus; Jorde, Per Erik; Albretsen, Jon; Johansen, Torild (Peer reviewed; Journal article, 2021)Many marine organisms have a permanent presence both inshore and offshore and spawn in multiple areas, yet their status as separate populations or stocks remain unclear. This is the situation for the northern shrimp (Pandalus ... -
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 ... -
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 ... -
Genomic analysis reveals neutral and adaptive patterns that challenge the current management regime for East Atlantic cod Gadus morhua L
Johansen, Torild; Besnier, Francois; Sanchez, Maria Quintela; Jorde, Per Erik; Glover, Kevin; Westgaard, Jon-Ivar; Dahle, Geir; Lien, Sigbjørn; Kent, Matthew Peter (Peer reviewed; Journal article, 2020)Challenging long‐held perceptions of fish management units can help to protect vulnerable stocks. When a fishery consisting of multiple genetic stocks is managed as a single unit, overexploitation and depletion of minor ... -
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) -
Hver fjord, sin torskebestand?
Jorde, Per Erik (Havforskningsnytt, Working paper, 2004)