2024
Unlocking the secret life of blue mussels: Exploring connectivity in the Skagerrak through biophysical modeling and population genomics
Malin Gustafsson, Åsa Strand, Ane Timenes Laugen, Jon Albretsen, Carl André, Göran Broström, Per Erik Jorde, Halvor Knutsen, Olga Ortega-Martinez, Marte Sodeland, Malin Waern, Anna-Lisa Wrange, Pierre De Wit
Evolutionary Applications
17
2024
The International Union for Conservation of Nature Red List does not account for intraspecific diversity
Kjell Magnus Norderhaug, Halvor Knutsen, Karen Filbee-Dexter, Marte Sodeland, Per Erik Jorde, Thomas Wernberg, Rebekah Alice Oomen, Even Moland
ICES Journal of Marine Science
2024
Genetic analyses verify sexually mature escaped farmed Atlantic cod and farmed cod eggs in the natural environment
Per Erik Jorde, Terje van der Meeren, María Quintela, Geir Dahle, Alejandro Mateos-Rivera, Marit Aase, Birgitta Norberg, Pål Næverlid Sævik, Pål Arne Bjørn, Kevin Alan Glover
Evolutionary Applications
17
2023
Contrasting management regimes indicative of mesopredator release in temperate coastal fish assemblages
Ann-Elin Synnes, Esben Moland Olsen, Per Erik Jorde, Halvor Knutsen, Even Moland
Ecology and Evolution
13
2022
Stabilizing selection on Atlantic cod supergenes through a millennium of extensive exploitation
Marte Sodeland, Sissel Jentoft, Per Erik Jorde, Morten Mattingsdal, Jon Albretsen, Alf Ring Kleiven, Ann-Elin Synnes, Sigurd Heiberg Espeland, Esben Moland Olsen, Carl André, Nils Christian Stenseth, Halvor Knutsen
Proceedings of the National Academy of Sciences of the United States of America
119
2022
Combining population genomics with demographic analyses highlights habitat patchiness and larval dispersal as determinants of connectivity in coastal fish species
Halvor Knutsen, Diana Sofia de Oliveira Catarino, Lauren Rogers, Marte Sodeland, Morten Mattingsdal, Marlene Jahnke, Jeffrey Hutchings, Ida Kristin Mellerud, Sigurd Heiberg Espeland, Kerstin Johanneson, Olivia Roth, Michael Møller Hansen, Sissel Jentoft, Carl Andre, Per Erik Jorde
Molecular Ecology
31
p. 2562-2577
2022
Geographic variation in gene flow from a genetically distinct migratory ecotype drives population genetic structure of coastal Atlantic cod (Gadus morhua L.)
Bjørghild Breistein Seliussen, Geir Dahle, Torild Johansen, Francois Besnier, Maria Quintela, Per Erik Jorde, Halvor Knutsen, Jon-Ivar Westgaard, Kjell Harald Nedreaas, Eva Farestveit, Kevin Alan Glover
Evolutionary Applications
15
p. 1162-1176
2021
Genetic differentiation between inshore and offshore populations of northern shrimp (Pandalus borealis)
Agneta Hansen, Jon-Ivar Westgaard, Guldborg Søvik, Tanja Lexau Hanebrekke, Einar Magnus Nilssen, Per Erik Jorde, Jon Albretsen, Torild Johansen
ICES Journal of Marine Science
78
p. 3135-3146
2021
Local recruitment of Atlantic cod and putative source spawning areas in a coastal seascape
Ann-Elin Synnes, Mats Brockstedt Olsen Huserbråten, Halvor Knutsen, Per Erik Jorde, Marte Sodeland, Even Moland
ICES Journal of Marine Science
78
p. 3767-3779
2021
The making of a genetic cline: introgression of oceanic genes into coastal cod populations in the Northeast Atlantic
Per Erik Jorde, Mats Brockstedt Olsen Huserbråten, Bjørghild Breistein Seliussen, Mari Skuggedal Myksvoll, Frode Bendiksen Vikebø, Geir Dahle, Asgeir Aglen, Torild Johansen
Canadian Journal of Fisheries and Aquatic Sciences
78
p. 958-968
2021
Genetic structuring in Atlantic haddock contrasts with current management regimes
Paul R. Berg, Per E. Jorde, Kevin A. Glover, Geir Dahle, John B. Taggart, Knut Korsbrekke, Gjert E. Dingsør, Jon E. Skjæraasen, Peter J. Wright, Steven X. Cadrin, Halvor Knutsen, Jon-Ivar Westgaard
ICES Journal of Marine Science
78
p. 1-13
2020
First measurements of field metabolic rate in wild juvenile fishes show strong thermal sensitivity but variations between sympatric ecotypes
Ming-Tsung Chung, Kris-Emil Mose Jørgensen, Clive N. Trueman, Halvor Knutsen, Per Erik Jorde, Peter Grønkjær
Oikos
130
p. 287-299
2020
Genomic analysis reveals neutral and adaptive patterns that challenge the current management regime for East Atlantic cod Gadus morhua L
Torild Johansen, Francois Besnier, Maria Quintela Sanchez, Per Erik Jorde, Kevin Glover, Jon-Ivar Westgaard, Geir Dahle, Sigbjørn Lien, Matthew Peter Kent
Evolutionary Applications
p. 1-16
2020
Settlement processes induce differences in daily growth rates between two co-existing ecotypes of juvenile cod Gadus morhua
Kris-Emil M. Jørgensen, Anna B. Neuheimer, Per Erik Jorde, Halvor Knutsen, Peter Grønkjær
Marine Ecology Progress Series
650
p. 175-189
2019
Demographic history has shaped the strongly differentiated corkwing wrasse populations in Northern Europe
Morten Mattingsdal, Per Erik Jorde, Halvor Knutsen, Sissel Jentoft, Nils Christian Stenseth, Marte Sodeland, Joana I. Robalo, Michael Møller Hansen, Carl André, Enrique Blanco Gonzalez
Molecular Ecology
2019
Demographic history has shaped the strongly differentiated corkwing wrasse populations in Northern Europe
Morten Mattingsdal, Per Erik Jorde, Halvor Knutsen, Sissel Jentoft, Nils Christian Stenseth, Marte Sodeland, Joana I. Robalo, Michael M. Hansen, Carl André, Enrique Blanco Gonzalez
Molecular Ecology
p. 1-12
2019
Interbreeding between local and translocated populations of a cleaner fish in an experimental mesocosm predicts risk of disrupted local adaptation
Enrique Blanco Gonzalez, Sigurd Heiberg Espeland, Sissel Jentoft, Michael Møller Hansen, Joana I. Robalo, Nils Christian Stenseth, Per Erik Jorde
Ecology and Evolution
9
p. 6665-6677
2018
Inferring genetic connectivity in real populations, exemplified by coastal and oceanic Atlantic cod
Ingrid Spies, Lorenz Hauser, Per Erik Jorde, Halvor Knutsen, André E. Punt, Lauren Rogers, Nils Christian Stenseth
Proceedings of the National Academy of Sciences of the United States of America
115
p. 4945-4950
2018
Stable coexistence of genetically divergent Atlantic cod ecotypes at multiple spatial scales
Halvor Knutsen, Per Erik Jorde, Jeffrey Hutchings, Jakob Hemmer-Hansen, Peter Grønkjær, Kris-Emil Mose Jørgensen, Carl André, Marte Sodeland, Jon Albretsen, Esben Moland Olsen
Evolutionary Applications
11
p. 1527-1539
2018
Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod
Per Erik Jorde, Ann-Elin Synnes, Sigurd Heiberg Espeland, Marte Sodeland, Halvor Knutsen
Ecology and Evolution
8
p. 12547-12558
2018
Who is fishing on what stock: Population-of-origin of individual cod (Gadus morhua) in commercial and recreational fisheries
Per Erik Jorde, Alf Ring Kleiven, Marte Sodeland, Esben Moland Olsen, Keno Ferter, Sissel Jentoft, Halvor Knutsen
ICES Journal of Marine Science
75
p. 2153-2162
2018
Are we underestimating the occurrence of sympatric populations?
Per Erik Jorde, Anastasia Andersson, Nils Ryman, Linda Laikre
Molecular Ecology
27
p. 4011-4025
2017
The role of the Strait of Gibraltar in shaping the genetic structure of the Mediterranean Grenadier, Coryphaenoides mediterraneus, between the Atlantic and Mediterranean Sea
Diana Catarino, Sergio Stefanni, Per Erik Jorde, Gui Menezes, Joan B. Company, Francis Neat, Halvor Knutsen
PLOS ONE
12
p. 1-24
2017
Genome architecture enables local adaptation of Atlantic cod despite high connectivity
Julia Maria Isis Barth, Paul Ragnar Berg, Per R Jonsson, Sara Bonanomi, Hanna Corell, Jakob Hemmer-Hansen, Kjetill Sigurd Jakobsen, Kerstin Johannesson, Per Erik Jorde, Halvor Knutsen, Per-Olav Moksnes, Bastiaan Star, Nils Christian Stenseth, Henrik Svedang, Sissel Jentoft, Carl Andre
Molecular Ecology
26
p. 4452-4466
2016
Population structure in Atlantic cod in the eastern North Sea-Skagerrak-Kattegat: early life stage dispersal and adult migration
Carl André, Hendrik Svedang, Halvor Knutsen, Geir Dahle, Patrik Jonsson, Anna-Karin Ring, Mattias Sköld, Per Erik Jorde
BMC Research Notes
9
2016
"Islands of divergence" in the Atlantic cod genome represent polymorphic chromosomal rearrangements
Marte Sodeland, Per Erik Jorde, Sigbjørn Lien, Sissel Jentoft, Paul Ragnar Berg, Harald Grove, Matthew Peter Kent, Mariann Arnyasi, Esben Moland Olsen, Halvor Knutsen
Genome Biology and Evolution (GBE)
8
p. 1012-1022
2016
Habitat discontinuities separate genetically divergent populations of a rocky shore marine fish
Enrique Blanco Gonzalez, Halvor Knutsen, Per Erik Jorde
PLOS ONE
11
2015
Does population genetic structure support present management regulations of the northern shrimp (Pandalus borealis)in Skagerrak and the North Sea?
Halvor Knutsen, Per Erik Jorde, Enrique Blanco Gonzalez, Ole Ritzau Eigaard, Ricardo T. Pereyra, Hanne Sannæs, Mikael Dahl, Carl André, Guldborg Søvik
ICES Journal of Marine Science
72
p. 863-871
2015
Genetically distinct populations of northern shrimp, Pandalus borealis, in the North Atlantic: adaptation to different temperatures as an isolation factor
Per Erik Jorde, Guldborg Søvik, Jon-Ivar Westgaard, Jon Albretsen, Carl André, Carsten Hvingel, Torild Johansen, Anne Dagrun Sandvik, Michael Charles Kingsley, Knut Eirik Jørstad
Molecular Ecology
24
p. 1742-1757
2015
The Pillars of Hercules as a bathymetric barrier to gene flow promoting isolation in a global deep-sea shark (Centroscymnus coelolepis)
Diana Catarino, Halvor Knutsen, Ana Verissimo, Esben Moland Olsen, Per Erik Jorde, Gui Menezes, Hanne Sannæs, David Stanković, Joan Baptista Company, Francis Neat, Roberto Danovaro, Antonio Dell'Anno, Bastien Rochowski, Sergio Stefanni
Molecular Ecology
24
p. 6061-6079
2014
Samples from subdivided populations yield biased estimates of effective size that overestimate the rate of loss of genetic variation
Nils Ryman, Fred W. Allendorf, Per Erik Jorde, Linda Laikre, Ola Hössjer
Molecular Ecology Resources
14
p. 87-99
2014
Genetic analyses of ling (Molva molva) in the Northeast Atlantic reveal patterns relevant to stock assessments and management advice
Enrique Blanco Gonzalez, Halvor Knutsen, Per Erik Jorde, Kevin Glover, Odd Aksel Bergstad
ICES Journal of Marine Science
72
p. 635-641
2014
Does population genetic structure support present management regulations of the northern shrimp (Pandalus borealis) in Skagerrak and the North Sea?
Halvor Knutsen, Per Erik Jorde, Enrique Blanco, Eigaard Ole, Ricardo T. Pereyra, Hanne Sannæs, Mikael Dahl, Carl Andre, Guldborg Søvik
ICES Journal of Marine Science
72
p. 863-871
2014
Ocean-scale connectivity and life cycle reconstruction in a deep-sea fish
Craig Longmore, Clive N. Trueman, Francis Neat, Per Erik Jorde, Halvor Knutsen, Sergio Stefanni, Diana Catarino, James A. Milton, Stefano Mariani
Canadian Journal of Fisheries and Aquatic Sciences
71
p. 1312-1323
2013
Quasi equilibrium approximations of the fixation index under neutrality: The finite and infinite island models
Ola Hössjer, Per Erik Jorde, Nils Ryman
Theoretical Population Biology
84
p. 9-24
2013
Climate Change and Genetic Structure of Leading Edge and Rear End Populations in a Northwards Shifting Marine Fish Species, the Corkwing Wrasse (Symphodus melops)
Halvor Knutsen, Per Erik Jorde, Enrique Blanco Gonzalez, Joana I. Robalo, Jon Albretsen, Vitor C. Almada
PLOS ONE
8
2012
Northern refugia and recent expansion in the North Sea: the case of the wrasse Symphodus melops (Linnaeus, 1758)
Joana I. Robalo, Rita Castilho, Sara M. Francisco, Frederico Almada, Halvor Knutsen, Per Erik Jorde, Ana M. Pereira, Vitor C. Almada
Ecology and Evolution
2
p. 153-164
2012
Population genetic structure in a deepwater fish Coryphaenoides rupestris: patterns and processes
Halvor Knutsen, Per Erik Jorde, Odd Aksel Bergstad, Morten D. Skogen
Marine Ecology Progress Series
460
p. 233-246
2012
Allele frequency covariance among cohorts and its use in estimating effective size of age-structured populations
Jorde, Per Erik
Molecular Ecology Resources
12
p. 476-480
2012
Life history and demographic determinants of effective/census size ratios as exemplified by brown trout (Salmo trutta)
Dimitar Serbezov, Per Erik Jorde, L Bernatchez, Esben Moland Olsen, Leif Asbjørn Vøllestad
Evolutionary Applications
5
p. 607-618
2012
Short-Term Genetic Changes: Evaluating Effective Population Size Estimates in a Comprehensively Described Brown Trout (Salmo trutta) Population
Dimitar Serbezov, Per Erik Jorde, L Bernatchez, Esben Moland Olsen, Leif Asbjørn Vøllestad
Genetics
191
p. 579-592
2011
Are low but statistically significant levels of genetic differentiation in marine fishes 'biologically meaningful'? A case study of coastal Atlantic cod
Halvor Knutsen, Esben Moland Olsen, Per Erik Jorde, Sigurd Heiberg Espeland, C. André, Nils Christian Stenseth
Molecular Ecology
20
p. 768-783
2009
Isolation and characterisation of 11 microsatellite loci in the abyssal carapine grenadier Coryphaenoides carapinus (Actinoperygii, Macrouridae) and cross-amplification in two other deep-sea macrourid species
M Schneider, H Sannaes, Per Erik Jorde, Halvor Knutsen
Conservation Genetics
10
p. 1869-1871
2009
Bathymetric barriers promoting genetic structure in the deepwater demersal fish tusk (Brosme brosme)
Halvor Knutsen, Per Erik Jorde, Hanne Sannæs, A. Rus Hoelzel, Odd Aksel Bergstad, Sergio Stefanni, Torild Johansen, Nils Christian Stenseth
Molecular Ecology
18
p. 3151-3162
2009
Dynamic micro-geographic and temporal genetic diversity in vertebrates: the case of lake-spawning populations of brown trout (Salmo trutta)
Jan Heggenes, KH Roed, Per Erik Jorde, Åge Brabrand
Molecular Ecology
18
p. 1100-1111
2009
Dynamic micro-geographic and temporal genetic diversity in vertebrates: the case of lake-spawning populations of brown trout (Salmo trutta)
Jan Heggenes, Knut Røed, Knut Røed, Per Erik Jorde, Åge Brabrand
Molecular Ecology
18
p. 1100-1111
2008
Small-scale biocomplexity in coastal Atlantic cod supporting a Darwinian perspective on fisheries management
Esben Moland Olsen, Halvor Knutsen, Jakob Gjøsæter, Per Erik Jorde, Jan Atle Knutsen, Nils Christian Stenseth
Evolutionary Applications
1
p. 524-533
2007
Population genetic structure in the North Atlantic Greenland halibut (Reinhardtius hippoglossoides): influenced by oceanic current systems?
H Knutsen, Per Erik Jorde, OT Albert, AR Hoelzel, Nils Christian Stenseth
Canadian Journal of Fisheries and Aquatic Sciences
64
2007
Unbiased estimator for genetic drift and effective population size
Per Erik Jorde, Nils Ryman
Genetics
177
p. 927-935
2007
Detecting genetic structure in migrating bowhead whales off the coast of Barrow, Alaska
Per Erik Jorde, Tore Schweder, JW Bickham, GH Givens, R Suydam, D Hunter, Nils Christian Stenseth
Molecular Ecology
16
p. 1993-2004
2007
Spatial scale of genetic structuring in coastal cod Gadus morhua and geographic extent of local populations
Per Erik Jorde, Halvor Knutsen, Sigurd Heiberg Espeland, Nils Christian Stenseth
Marine Ecology Progress Series
343
p. 229-237
2007
Population genetic structure in the North Atlantic Greenland halibut: influenced by oceanic current systems?
Halvor Knutsen, Per Erik Jorde, Ole Thomas Albert, AR Hoelzel, Nils Christian Stenseth
Canadian Journal of Fisheries and Aquatic Sciences
64
p. 857-866
2006
Ecological and genetic impact of Atlantic cod larval drift in the Skagerrak
Nils Christian Stenseth, Per Erik Jorde, Kung-Sik Chan, E Hansen, Halvor Knutsen, Carl André, Morten Skogen, Kyrre Lekve
Proceedings of the Royal Society of London. Biological Sciences
273
p. 1085-1092
2006
Power for detecting genetic divergence: differences between statistical methods and marker loci
N Ryman, S Palm, C Andre, GR Carvalho, TG Dahlgren, Per Erik Jorde, L Laikre, LC Larsson, A Palme, DE Ruzzante
Molecular Ecology
15
2005
High genetic variability despite high-amplitude population cycles in lemmings
Dorothee Ehrich, Per Erik Jorde
Journal of Mammalogy
86
p. 380-385
2004
Transport of North Sea cod larvae into the Skagerrak coastal populations
Halvor Knutsen, Carl André, Per Erik Jorde, Morten Skogen, E. Thuróczy, Nils Christian Stenseth
Proceedings of the Royal Society of London. Biological Sciences
271
p. 1337-1344
2004
Life-history variation among local populations of Atlantic cod from the Norwegian Skagerrak coast
Esben Moland Olsen, Halvor Knutsen, Jakob Gjøsæter, Per Erik Jorde, Jan Atle Knutsen, Nils Christian Stenseth
Journal of Fish Biology
64
p. 1725-1730
2003
Cryptic population structure in a large, mobile mammalian predator: the Scandinavian lynx
Eli Knispel Rueness, Per Erik Jorde, L. Hellborg, Nils Christian Stenseth, H. Ellegren, Kjetill Sigurd Jakobsen
Molecular Ecology
12
p. 2623-2633
2003
Effective population size and temporal genetic change in stream resident brown trout (Salmo trutta, L.)
Stefan Palm, Linda Laikre, Per Erik Jorde, Nils Ryman
Conservation Genetics
4
p. 249-264
2003
Fine-scaled geographic population structuring in a highly mobile marine species: the Atlantic cod
Halvor Knutsen, Per Erik Jorde, Carl Andre, Nils Christian Stenseth
Molecular Ecology
12
p. 385-394
2001
Statistical power when testing for genetic differentiation
Nils Ryman, Per Erik Jorde
Molecular Ecology
10
p. 2361-2374
2001
Spatial structure of lemming populations (Dicrostonyx groenlandicus) fluctuating in density
Dorothee Ehrich, Per Erik Jorde, C.J. Krebs, A.J. Kenney, John Erik Stacy, Nils Christian Stenseth
Molecular Ecology
10
p. 481-495
2001
Genetic evidence for mixed origin of recolonized sea-trout populations
Halvor Knutsen, Jan Atle Knutsen, Per Erik Jorde
Heredity
87
p. 207-214
2000
Genetic differentiation among populations of the beetle Bolitophagus reticulatus (Coleoptera: Tenebrionidae) in a fragmented and a continuous landscape
Halvor Knutsen, Bjørn Arne Rukke, Per Erik Jorde, Rolf Anker Ims
Heredity
6
p. 667-676
1999
Supportive breeding and inbreeding effective number: reply to Nomura
Nils Ryman, Per Erik Jorde, Linda Laikre
Conservation Biology
13
p. 673-676
1999
Estimating genetic drift and effective population size from temporal shifts of dominant gene marker frequencies
Per Erik Jorde, Stefan Palm, Nils Ryman
Molecular Ecology
8
p. 1171-1178
1998
Temporal change of mitochondrial DNA haplotype frequencies and female effective size in a brown trout (Salmo trutta) population
Linda Laikre, Per Erik Jorde, Nils Ryman
Evolution
52
p. 910-915
1998
Allozyme variation in allotetraploid Saxifraga osloensis and its diploid progenitors
Thomas Nilsson, Per Erik Jorde
Nordic Journal of Botany (NJB)
18
p. 425-430
1997
Inheritance and linkage of isozyme loci in the basket willow (Salix viminalis L.)
Johanna Thorsén, Per Erik Jorde, F. A. Aravanopoulos, U. Gullberg, L. Zsuffa
Journal of Heredity
88
p. 144-150
1997
Lack of concordance between mtDNA gene flow and population density fluctuations in the bank vole
John Erik Stacy, Per Erik Jorde, Harald Steen, Rolf Anker Ims, A. Purvis, Kjetill Sigurd Jakobsen
Molecular Ecology
6
p. 751-759
1996
Genetic variability at minisatellite and allozyme loci in brown trout (Salmo trutta} -A comparison
Linda Laikre, Paulo A. Prodöhl, Per Erik Jorde, Nils Ryman
Hereditas
123
p. 191-195
1996
Demographic genetics of brown trout (Salmo trutta) and estimation of effective population size from temporal change of allele frequencies
Per Erik Jorde, Nils Ryman
Genetics
143
p. 1369-1381
1995
Supportive breeding and variance effective population size
Nils Ryman, Per Erik Jorde, Linda Laikre
Conservation Biology
79
p. 1619-1628
1995
Temporal allele frequency change and estimation of effective size in populations with overlapping generations
Per Erik Jorde, Nils Ryman
Genetics
139
p. 1077-1090
1991
Allele frequency estimation at loci with incomplete co-dominant expression
Per Erik Jorde, Nils Ryman
Heredity
65
p. 429-433
1991
Management implications of genetic differentiation between native and hatchery populations of brown trout (Salmo trutta) in Spain
Jose Luis Garcia-Marin, Per Erik Jorde, Nils Ryman, Fred Utter, Charles Pla
Aquaculture
95
p. 235-249
1991
New biochemical genetic markers in the brown trout (Salmo trutta L.)
Per Erik Jorde, Andrew Gitt, Nils Ryman
Journal of Fish Biology
39
p. 451-454