Per Gunnar Fjelldal

Researcher

E-mail: pergf@hi.no

Telephone: 95402479

Department: Reproduksjon og utviklingsbiologi

Publications

Academic articles

2024

Chromosomal aberrations and early mortality in a non-mammalian vertebrate: example from pressure-induced triploid Atlantic salmon

Aurelien Nicolas Delaval, Kevin Alan Glover, Monica Favnebøe Solberg, Per Gunnar Fjelldal, Tom Johnny Hansen, Alison C. Harvey

Heredity

2024

Deciphering the pathogenesis of melanized focal changes in the white skeletal muscle of farmed Atlantic salmon (Salmo salar)

Håvard Bjørgen, Malin Brimsholm, Charlotte Finstad Asserson, Kirstin Skaar, Geir Magne Knutsen, Øyvind Oaland, Randi Haldorsen, Per Gunnar Fjelldal, Tom Johnny Hansen, Espen Rimstad, Britta Kleist, Marius Lund-Iversen, Mariusz Pawel Kowalewski, Erling Olaf Koppang

Journal of Fish Diseases

2024

Vgll3 regulates the timing of puberty in farmed Atlantic salmon, but it does not explain family discordance in male maturation following different smolt production regimes

Thomas Fraser, Aslak Tjølsen, Angelico Madaro, Tom Johnny Hansen, Per Gunnar Fjelldal

Aquaculture 593

2024

A new method for regionalization of the vertebral column in salmonids based on radiographic hallmarks

Sankar Murugesan, Harald Kryvi, Thomas Fraser, Antony Jesu Prabhu Philip, Sofie C. Remø, Tom Johnny Hansen, Paul Eckhard Witten, Per Gunnar Fjelldal

Journal of Fish Biology

2024

Loss of bmp15 function in the seasonal spawner Atlantic salmon results in ovulatory failure

Diego Crespo, Per Gunnar Fjelldal, Tom Johnny Hansen, Erik Nordtorp Kjærner-Semb, Kai Ove Skaftnesmo, Anders Thorsen, Birgitta Norberg, Rolf Brudvik Edvardsen, Eva Andersson, Rüdiger W. Schulz, Anna Wargelius, Lene Kleppe

The FASEB Journal 38

2024

A genetic method to infer ploidy and aberrant inheritance in triploid organisms

Aurelien Nicolas Delaval, Kevin Alan Glover, Monica Favnebøe Solberg, John B. Taggart, Francois Besnier, Anne Grete Eide Sørvik, Johanne Øyro, Sofie Nordaune Garnes-Gutvik, Per Gunnar Fjelldal, Tom Johnny Hansen, Alison C. Harvey

Molecular Ecology Resources

2024

Organisation of the Atlantic salmon (Salmo salar) thymus and its content of Ig-expressing cells

Håvard Bjørgen, Fran Barac, Per Gunnar Fjelldal, Tom Johnny Hansen, Ivar Hordvik, Erling Olaf Koppang

Fish and Shellfish Immunology 150

2024

Exogenous growth hormone (GH) increases dimension and reduces strength of vertebrae in Atlantic salmon (Salmo salar)

Per Gunnar Fjelldal, Takaya Saito, Björn Thrandur Björnsson, Peng Yin, Tom Johnny Hansen, Audun Østby Pedersen, Kristin Hamre

Aquaculture 589

2024

Comparing physiological responses of acute and chronically stressed diploid and triploid Atlantic salmon (Salmo salar)

Angelico Madaro, Floriana Lai, Per Gunnar Fjelldal, Tom Johnny Hansen, Virginie Gelebart, Brynjar Muren, Ivar Rønnestad, Rolf-Erik Olsen, Lars Helge Stien

Aquaculture Reports 36

2024

Loss of Fshr Prevents Testicular Maturation in Atlantic Salmon (Salmo salar L.)

Eva Andersson, Rüdiger W. Schulz, Fernanda Almeida, Lene Kleppe, Kai Ove Skaftnesmo, Erik Nordtorp Kjærner-Semb, Diego Crespo, Per Gunnar Fjelldal, Tom Johnny Hansen, Birgitta Norberg, Rolf Brudvik Edvardsen, Anna Wargelius

Endocrinology 165

2024

Louse-induced mortality thresholds in Atlantic salmon of wild-origin

Samantha Bui, Per Gunnar Fjelldal, Malthe Hvas, Ørjan Karlsen, Sussie Trine Dalvin

Conservation Science and Practice (CSP)

2024

Regional and temporal variation in escape history of Norwegian farmed Atlantic salmon

Nina Strand, Kevin Alan Glover, Sonnich Meier, Fernando Ayllon, Vidar Wennevik, Abdullah Sami Madhun, Øystein Skaala, Kristin Hamre, Per Gunnar Fjelldal, Tom Johnny Hansen, Eero Niemelä, Sofie Knutar, Per Tommy Andersen-Fjeldheim, Monica Favnebøe Solberg

ICES Journal of Marine Science 81 p. 119-129

2024

Environmentally driven changes in Atlantic salmon oxidative status interact with physiological performance

Peng Yin, Takaya Saito, Per Gunnar Fjelldal, Björn Thrandur Björnsson, Sofie C. Remø, Sandeep Sharma, Rolf-Erik Olsen, Kristin Hamre

Aquaculture 581

2024

Spawning manipulation, broodfish diet feeding and egg production in farmed Atlantic salmon

Per Gunnar Fjelldal, Anne-Catrin Adam, Gerd Marit Berge, Ingrid Lein, Ernst Morten Hevrøy, Ingun Næve, Rudi R. Seim, Maren Mommens, Kaja Helvik Skjærven, Tom Johnny Hansen, Kristin Hamre

Aquaculture 580

2023

Experimental transmission of piscine orthoreovirus-1 (PRV-1) in different life stages of Atlantic salmon (Salmo salar) and brown trout (Salmo trutta)

Dhamotharan Kannimuthu, HyeongJin Roh, Hugh Craig Morton, Ma Michelle Demogina Penaranda, Anne Vossgård, Tom Johnny Hansen, Per Gunnar Fjelldal, Egil Erlingsson Karlsbakk, Ingrid Uglenes Fiksdal, Maria Dahle, Hakon Schau Berg-Rolness, Stig Mæhle, Dawit Berhe Ghebretnsae, Joachim Nordbø, Sonal Patel, Abdullah Sami Madhun, Søren Grove, Bjørn Olav Kvamme

Frontiers in Marine Science 10

2023

The Distribution of IgT mRNA+ Cells in the Gut of the Atlantic Salmon (Salmo salar L.)

Pedro Luis Castro, Fran Barac, Tom Johnny Hansen, Per Gunnar Fjelldal, Ivar Hordvik, Håvard Bjørgen, Erling Olaf Koppang

Animals 13

2023

Effects of temperature and feeding regime on cortisol concentrations in scales of Atlantic salmon post-smolts

Christina O'Toole, Philip White, Katie Thomas, Niall O'Maoiléidigh, Per Gunnar Fjelldal, Tom Johnny Hansen, Conor T. Graham, Deirdre Brophy

Journal of Experimental Marine Biology and Ecology 569

2023

Anatomical and pathological characteristics of ribs in the Atlantic salmon (Salmo salar L.) and its relevance to soft tissue changes

Malin Helen Brimsholm, Per Gunnar Fjelldal, Tom Johnny Hansen, Cathrine Trangerud, Geir Magne Knutsen, Charlotte Finstad Asserson, Erling Olaf Koppang, Håvard Bjørgen

Anatomia, Histologia, Embryologia. Journal of Veterinary Medicine Series C

2023

Long term effects of smolt production strategy and early seawater phase rearing environment on mortality, growth, sexual maturation, and vertebra deformities in farmed Atlantic salmon (Salmo salar L.)

Lars Eirik Myklatun, Thomas Fraser, Per Gunnar Fjelldal, Audun Østby Pedersen, Tom Johnny Hansen

Aquaculture 569

2023

Dietary beauvericin and enniatin B exposure cause different adverse health effects in farmed Atlantic salmon

Marc HG Berntssen, Per Gunnar Fjelldal, P.J. Gavaia, V. Laizé, Kristin Hamre, Carey Donald, J.V. Jakobsen, A. Omdal, Karin Sofie Søderstrøm, Kai Kristoffer Lie

Food and Chemical Toxicology (FCT) 174

2023

Red and melanized focal changes in white skeletal muscle in Atlantic salmon (Salmo salar): Comparative analysis of farmed, wild and hybrid fish reared under identical conditions

Malin Helen Brimsholm, Per Gunnar Fjelldal, Tom Johnny Hansen, Thomas Fraser, Monica Favnebøe Solberg, Kevin Alan Glover, Erling Olaf Koppang, Håvard Bjørgen

Journal of Fish Diseases

2023

Seasonal Changes in Photoperiod: Effects on Growth and Redox Signaling Patterns in Atlantic Salmon Postsmolts

Peng Yin, Takaya Saito, Per Gunnar Fjelldal, Björn Thrandur Björnsson, Sofie C. Remø, Tom Johnny Hansen, Sandeep Sharma, Rolf-Erik Olsen, Kristin Hamre

Antioxidants 12

2023

Experimental transmission of piscine orthoreovirus-1 (PRV-1) in different life stages of Atlantic salmon (Salmo salar) and brown trout (Salmo trutta)

Dhamotharan Kannimuthu, HyeongJin Roh, Hugh Craig Morton, Ma Michelle Demogina Penaranda, Anne Vossgård, Tom Johnny Hansen, Per Gunnar Fjelldal, Egil Erlingsson Karlsbakk, Ingrid Uglenes Fiksdal, Maria Dahle, Håkon Berg-Rolness, Stig Mæhle, Dawit Berhe Ghebretnsae, Joachim Nordbø, Sonal Patel, Abdullah Sami Madhun, Søren Grove, Bjørn Olav Kvamme

Frontiers in Marine Science 10

2023

Environmental and Genetic (vgll3) Effects on the Prevalence of Male Maturation Phenotypes in Domesticated Atlantic Salmon

Thomas Fraser, Tom Johnny Hansen, Per Gunnar Fjelldal

Fishes 8

2023

Elevated Water CO2 Can Prevent Dietary-Induced Osteomalacia in Post-Smolt Atlantic Salmon (Salmo salar, L.)

Lucia Drábiková, Per Gunnar Fjelldal, Muhammad Naveed Yousaf, Thea Morken, Adelbert De Clercq, Charles McGurk, Paul Eckhard Witten

Biomolecules 13

2023

Long term effects of smolt production strategy and early seawater phase rearing environment on mortality, growth, sexual maturation, and vertebra deformities in farmed Atlantic salmon (Salmo salar L.)

Lars Eirik Myklatun, Thomas Fraser, Per Gunnar Fjelldal, A.O. Pedersen, T.J. Hansen

Aquaculture 569

2023

Adaptive photoperiod interpretation modulates phenological timing in Atlantic salmon

Tina Marie Wier Oldham, Frode Oppedal, Per Gunnar Fjelldal, Tom Johnny Hansen

Scientific Reports 13

2023

Atlantic salmon male post-smolt maturation can be reduced by using a 3-hour scotophase when inducing smoltification

Thomas Fraser, Tom Johnny Hansen, Birgitta Norberg, Tom Ole Nilsen, Rüdiger W. Schulz, Per Gunnar Fjelldal

Aquaculture 562

2023

In sea trout, the physiological response to salmon louse is stronger in female than in males

Per Gunnar Fjelldal, Sussie Trine Dalvin, Mathias Stølen Ugelvik, Audun Østby Pedersen, Tom Johnny Hansen, Bjørnar Skjold, Lise Dyrhovden, Ann-Kathrin Jakobsen Kroken, Ørjan Karlsen

Conservation Physiology 11

2023

Dietary zinc, selenium and water temperature during early seawater phase influences the development of vertebral deformities and cataract in adult Atlantic salmon

Antony Jesu Prabhu Philip, Per Gunnar Fjelldal, Sofie C. Remø, Marta Sofia Silva, May-Helen Holme, Erik Jan Robert Lock, Rune Waagbø

Aquaculture 572

2023

Anatomical and pathological characteristics of ribs in the Atlantic salmon (Salmo salar L.) and its relevance to soft tissue changes

Malin Helen Brimsholm, Per Gunnar Fjelldal, Tom Hansen, Cathrine Trangerud, Geir Magne Knutsen, Charlotte Finstad Asserson, Erling Olaf Koppang, Håvard Bjørgen

Anatomia, Histologia, Embryologia. Journal of Veterinary Medicine Series C

2022

Triploid Atlantic salmon × brown trout hybrids have similar seawater growth and welfare issues as triploid Atlantic salmon, but both were heavier at harvest than their diploid counterparts

Thomas Fraser, Tom Johnny Hansen, Sofie C. Remø, Rolf Erik Olsen, Per Gunnar Fjelldal

Aquaculture 552

2022

Dietary electrolyte balance of Atlantic salmon (Salmo salar) freshwater feeds: Impact on osmoregulation, mineral metabolism and performance in seawater

P. Antony Jesu Prabhu, Per Gunnar Fjelldal, Sofie C. Remø, Chandrasekar Selvam, Kristin Hamre, Marit Espe, Elisabeth Holen, Kaja Helvik Skjærven, Vibeke Vikså, Saravanan Subramanian, Johan W. Schrama, Nini Sissener

Aquaculture 546

2022

Tailoring freshwater diets towards boosted immunity and pancreas disease infection robustness in Atlantic salmon post smolts

Elisabeth Holen, M Chen, Per Gunnar Fjelldal, Kaja Helvik Skjærven, Nini Sissener, Sofie C. Remø, P. Antony Jesu Prabhu, Kristin Hamre, Vibeke Vikeså, S. Subramanian, Marit Espe

Fish and Shellfish Immunology 120 p. 377-391

2022

Dietary plant oil supplemented with arachidonic acid and eicosapentaenoic acid affects the fatty acid composition and eicosanoid metabolism of Atlantic salmon (Salmo salar L.) during smoltification

L. Miao, Sofie C. Remø, Marit Espe, P. Antony Jesu Prabhu, Kristin Hamre, Per Gunnar Fjelldal, Kaja Helvik Skjærven, Elisabeth Holen, Vibeke Vikeså, Nini Sissener

Fish and Shellfish Immunology 123 p. 194-206

2022

Pituitary Gonadotropin Gene Expression During Induced Onset of Postsmolt Maturation in Male Atlantic Salmon: In Vivo and Tissue Culture Studies

Diego Crespo, Kai Ove Skaftnesmo, Erik Nordtorp Kjærner-Semb, Ozlem Yilmaz, Birgitta Norberg, Sara Olausson, Petra Vogelsang, Jan Bogerd, Lene Kleppe, Rolf Brudvik Edvardsen, Eva Andersson, Anna Wargelius, Tom Johnny Hansen, Per Gunnar Fjelldal, Rüdiger W. Schulz

Frontiers in Endocrinology 13

2022

Warm water treatment increased mortality risk in salmon

Samantha Bui, Angelico Madaro, Jonatan Nilsson, Per Gunnar Fjelldal, Martin Haugmo Iversen, Monica Fengsrud Brinchmann, Birger Venås, Merete Bjørgan Schrøder, Lars Helge Stien

Veterinary and Animal Science 17

2022

Impact of atioxidant feed and growth manipulation on the redox regulation of Atlantic salmon smolts

Peng Yin, Bjørn Thrandur Bjørnsson, Per Gunnar Fjelldal, Takaya Saito, Sofie C. Remø, Rolf Brudvik Edvardsen, Tom Johnny Hansen, Sandeep Sharma, Rolf Erik Olsen, Kristin Hamre

Antioxidants 11 p. 1-18

2022

Vertebral column deformity in six species of wild fish at the Coromandel coast, Bay of Bengal India

Yosuva Mariasingarayan, Jeyapragash Danaraj, Bharathidasan Veeraiyan, Per Gunnar Fjelldal, Kannan Karuppiah, Rajendran Narayanasamy

Aquaculture and Fisheries

2022

What will happen to my smolt at harvest? Individually tagged Atlantic salmon help to understand possible progression and regression of vertebral deformities

Lucia Drábiková, Per Gunnar Fjelldal, Adelbert De Clercq, Muhammad Naveed Yousaf, Thea Morken, Charles McGurk, P. Eckhard Witten

Aquaculture 559

2022

Full production cycle performance of gene-edited, sterile Atlantic salmon - growth, smoltification, welfare indicators and fillet composition

Lene Kleppe, Per Gunnar Fjelldal, Eva Andersson, Tom Johnny Hansen, Monica Sanden, Aina Bruvik, Kai Ove Skaftnesmo, Tomasz Furmanek, Erik Nordtorp Kjærner-Semb, Diego Crespo, Simon Flavell, Audun Østby Pedersen, Petra Vogelsang, Anja Torsvik, Karen Anita Kvestad, Sara Olausson, Birgitta Norberg, Rüdiger W. Schulz, J. Bogerd, N. Santi, Rolf Brudvik Edvardsen, Anna Wargelius

Aquaculture 560

2022

Effects of laboratory salmon louse infection on mortality, growth, and sexual maturation in Atlantic salmon

Per Gunnar Fjelldal, Thomas Fraser, Tom Johnny Hansen, Ørjan Karlsen, Samantha Bui

ICES Journal of Marine Science 79 p. 1530-1538

2022

The Piwil1 N domain is required for germ cell survival in Atlantic salmon

Fernanda Loureiro Almeida, Kai Ove Skaftnesmo, Eva Andersson, Lene Kleppe, Rolf Brudvik Edvardsen, Birgitta Norberg, Per Gunnar Fjelldal, Tom Johnny Hansen, Rüdiger W. Schulz, Anna Wargelius

Frontiers in Cell and Developmental Biology 10

2022

Mapping the pattern of essential neuroendocrine cells related to puberty and VA opsin expression provides further insight in the photoreceptive regulation of the BPG axis in Atlantic salmon (Salmo salar)

Christine Horne, Jon Vidar Helvik, Mitchell Stewart Fleming, Per Gunnar Fjelldal, Mariann Eilertsen

Brain, Behavior and Evolution 98 p. 32-43

2021

Full compensatory growth before harvest and no impact on fish welfare in Atlantic salmon after an 8-week fasting period

Malthe Hvas, Jonatan Nilsson, Tone Vågseth, Velimir Nola, Per Gunnar Fjelldal, Tom Johnny Hansen, Frode Oppedal, Lars Helge Stien, Ole Folkedal

Aquaculture 546

2021

Wild Atlantic salmon enter aquaculture sea-cages: A case study

Per Gunnar Fjelldal, Samantha Bui, Tom Johnny Hansen, Frode Oppedal, Gunnar O Bakke, Lea Marie Hellenbrecht, Sofie Knutar, Abdullah Sami Madhun

Conservation Science and Practice (CSP) 3 p. 1-7

2021

Vertebral column adaptations in juvenile Atlantic salmon Salmo salar, L. as a response to dietary phosphorus

Lucia Drábiková, Per Gunnar Fjelldal, Adelbert De Clercq, Muhammad Naveed Yousaf, Thea Morken, Charles McGurk, P. Eckhard Witten

Aquaculture 541

2021

A comparison of triploid and diploid Atlantic salmon (Salmo salar) performance and welfare under commercial farming conditions in Norway

Angelico Madaro, Sissel Kjøglum, Tom Johnny Hansen, Per Gunnar Fjelldal, Lars Helge Stien

Journal of Applied Aquaculture

2021

Triploidy effects growth, life history strategies, and bone health in Arctic char (Salvelinus alpinus), but does not impact cataract incidence

Thomas Fraser, Tom Johnny Hansen, Sofie C. Remø, Per Gunnar Fjelldal

Aquaculture 547

2021

Triploidy leads to a mismatch of smoltification biomarkers in the gill and differences in the optimal salinity for post-smolt growth in Atlantic salmon

Raneesha de Fonseka, Per Gunnar Fjelldal, Florian Sambraus, Tom Ole Nilsen, Sofie C. Remø, Lars Helge Stien, Helena Reinardy, Angelico Madaro, Tom Johnny Hansen, Thomas Fraser

Aquaculture 546

2021

Wild Atlantic salmon enter aquaculture sea-cages: A case study

Per Gunnar Fjelldal, Samantha Bui, Tom Johnny Hansen, Frode Oppedal, Gunnar O Bakke, Lea Hellenbrecht, Sofie Knutar, Abdullah Sami Madhun

Conservation Science and Practice (CSP) 3 p. 1-7

2021

Triploid Atlantic salmon and triploid Atlantic salmon × brown trout hybrids have better freshwater and early seawater growth than diploid counterparts

Thomas Fraser, Hilde Lerøy, Tom Johnny Hansen, Jon Egil Skjæraasen, Valentina Tronci, Cindy Pinto Pedrosa, Per Gunnar Fjelldal, Tom Ole Nilsen

Aquaculture 540

2021

Loss of stra8 Increases Germ Cell Apoptosis but Is Still Compatible With Sperm Production in Atlantic Salmon (Salmo salar)

Kai Ove Skaftnesmo, Diego Crespo, Lene Kleppe, Eva Andersson, Rolf Brudvik Edvardsen, Birgitta Norberg, Per Gunnar Fjelldal, Tom Johnny Hansen, Rüdiger W. Schulz, Anna Wargelius

Frontiers in Cell and Developmental Biology 9

2021

The genome sequence of the brown trout, Salmo trutta Linnaeus 1758

Tom Johnny Hansen, Per Gunnar Fjelldal, Sigbjørn Lien, Michelle Smith, Craig Corton, Karen Oliver, Jason Skelton, Emma Betteridge, Jale Doulcan, Oliver Fedrigo, Jaquelyn Mountcastle, Erich Jarvis, Shane A. McCarthy, William Chow, Kerstin Howe, James Torrance, Jonathan Wood, Ying Sims, Leanne Haggerty, Richard Challis, Jonathan Threlfall, Daniel Mead, Richard Durbin, Mark Blaxter

Wellcome Open Research 6

2021

Ontogeny-Specific Skeletal Deformities in Atlantic Haddock Caused by Larval Oil Exposure

Pål Asgeir Olsvik, Elin Sørhus, Sonnich Meier, Ingrid Torvanger, Maja Thorbjørnsen, Anders Thorsen, Lisbet Sørensen, Per Gunnar Fjelldal, Ørjan Karlsen, Igo G. Guimaraes, Kai Kristoffer Lie

Frontiers in Marine Science 8 p. 1-16

2021

The effect of fasting period on swimming performance, blood parameters and stress recovery in Atlantic salmon post molts

Malthe Hvas, Jonatan Nilsson, Tone Vågseth, Velimir Nola, Per Gunnar Fjelldal, Tom Johnny Hansen, Frode Oppedal, Lars Helge Stien, Ole Folkedal

Aquaculture 546

2021

Can improved nutrition for Atlantic salmon in freshwater increase fish robustness, survival and growth after seawater transfer?

Nini Sissener, Kristin Hamre, Per Gunnar Fjelldal, P. Antony Jesu Philip, Marit Espe, L. Miao, Erik Höglund, Christina Sørensen, Kaja Skjærven, Elisabeth Holen, S. Subramanian, V. Vikeså, Birgitta Norberg, Sofie Remø

Aquaculture 542

2020

Triploid Atlantic salmon Salmo salar have a higher dietary phosphorus requirement for bone mineralization during early development

Florian Sambraus, Tom Johnny Hansen, Britt Sværen Daae, Anders Thorsen, Roar Sandvik, Lars Helge Stien, Thomas Fraser, Per Gunnar Fjelldal

Journal of Fish Biology 97 p. 137-147

2020

Development of supermale and all-male Atlantic salmon to research the vgll3 allele - puberty link

Per Gunnar Fjelldal, Tom Johnny Hansen, Anna Wargelius, Fernando Ayllon, Kevin Alan Glover, Rüdiger W. Schulz, Thomas Fraser

BMC Genetics 21

2020

Vertebral deformities in interspecific diploid and triploid salmonid hybrids

Thomas Fraser, Tom Johnny Hansen, Florian Sambraus, Per Gunnar Fjelldal

Journal of Fish Biology

2020

Skeletal deformities in wild and farmed cleaner fish species used in Atlantic salmon Salmo salar aquaculture

Per Gunnar Fjelldal, Angelico Madaro, Malthe Hvas, Lars Helge Stien, Frode Oppedal, Thomas Fraser

Journal of Fish Biology p. 1-10

2020

Effects of laboratory salmon louse infection on osmoregulation, growth and survival in Atlantic salmon

Per Gunnar Fjelldal, Tom Johnny Hansen, Ørjan Karlsen

Conservation Physiology 8 p. 1-10

2020

Heads and tails: The notochord develops differently in the cranium and caudal fin of Atlantic Salmon (Salmo salar, L.)

Harald Kryvi, Kari Nordvik, Per Gunnar Fjelldal, Mariann Eilertsen, Jon Vidar Helvik, Eivind Wilhelm Nagel Støren, John H. Long

Stem Cell Reviews and Reports (SCRR) p. 1-21

2020

DNA damage and health effects in juvenile haddock (Melanogrammus aeglefinus) exposed to PAHs associated with oil-polluted sediment or produced water

Sonnich Meier, Ørjan Karlsen, Jérémie Le Goff, Lisbet Sørensen, Elin Sørhus, Daniela Maria Pampanin, Carey Donald, Per Gunnar Fjelldal, Evgenia Dunaevskaya, Marta Romano, Ilaria Caliani, Silvia Casini, André Sture Bogevik, Pål Asgeir Olsvik, Mark Myers, Bjørn Einar Grøsvik

PLOS ONE 15

2020

A transcriptomic analysis of diploid and triploid Atlantic salmon lenses with and without cataracts

Pål Asgeir Olsvik, Roderick Nigel Finn, Sofie C. Remø, Per Gunnar Fjelldal, Francois Chauvigné, Kevin Glover, Tom Johnny Hansen, Rune Waagbø

Experimental Eye Research 199 p. 1-14

2020

No environmental effect on vaccine-induced reduced growth in Atlantic salmon Salmo salar smolts

Thomas WB Fraser, Per Gunnar Fjelldal, Ingunn Sommerset, Tina Søfteland, Ole Høstmark, Mark D Powell, Vegar Heen, Tom Johnny Hansen

Aquaculture Environment Interactions 12 p. 327-338

2020

Autosomal sdY pseudogenes explain discordances between phenotypic sex and DNA marker for sex identification in Atlantic salmon

Fernando Ayllon, Monica Favnebøe Solberg, Francois Besnier, Per Gunnar Fjelldal, Tom Johnny Hansen, Anna Wargelius, Rolf Brudvik Edvardsen, Kevin Glover

Frontiers in Genetics 11 p. 1-10

2020

Unravelling an unexpectedly complex duplication history of deuterostome glycerol transporters.

Ozlem Yilmaz, Francois Chauvigné, Alba Ferré, Frank Nilsen, Per Gunnar Fjelldal, Joan Cerdà, Roderick Nigel Finn

Cells 9 p. 1-29

2020

Production and verification of the first Atlantic salmon (Salmo salar L.) clonal lines

Tom Johnny Hansen, David J. Penman, Kevin Glover, Thomas Fraser, Tone Vågseth, Anders Thorsen, Anne Grete Eide Sørvik, Per Gunnar Fjelldal

BMC Genetics 21

2020

Chromosome aberrations in pressure-induced triploid Atlantic salmon

Kevin Glover, Alison C. Harvey, Tom Johnny Hansen, Per Gunnar Fjelldal, Francois Besnier, J.B. Bos, Fernando Ayllon, John B. Taggart, Monica Favnebøe Solberg

BMC Genetics 21 p. 59

2019

Salmon lice threaten growth, osmoregulation and survival in anadromous Arctic char post-smolts

Per Gunnar Fjelldal, Tom Johnny Hansen, Ørjan Karlsen, Daniel William Wright

Conservation Physiology 7

2019

The vertebrate Aqp14 water channel is a neuropeptide-regulated polytransporter

Francois Chauvigné, Ozlem Yilmaz, Alba Ferré, Per Gunnar Fjelldal, Roderick Nigel Finn, Joan Cerdà

Communications Biology 2:462 p. 1-13

2019

Phosphorus nutrition in farmed Atlantic salmon (Salmo salar): Life stage and temperature effects on bone pathologies

Thomas Fraser, Paul Eckhard Witten, Sissel Albrektsen, Olav Breck, Ramón Fontanillas, Leo Nankervis, Tårn Helgøy Thomsen, Wolfgang Koppe, Florian Sambraus, Per Gunnar Fjelldal

Aquaculture 511 p. 1-12

2019

Visualization of CCL19-like transcripts in the ILT, thymus and head kidney of Atlantic salmon (Salmo salar L.)

Håvard Bjørgen, Oskar Mongstad Løken, Ida Bergva Aas, Per Gunnar Fjelldal, Tom Johnny Hansen, Lars Austbø, Erling Olaf Koppang

Fish and Shellfish Immunology 93 p. 763-765

2019

Evolutionary drivers of kype size in atlantic salmon (salmo salar): domestication, age and genetics

William Perry, Monica Favnebøe Solberg, Francois Besnier, Lise Dyrhovden, Ivar Helge Matre, Per Gunnar Fjelldal, Fernando Ayllon, Simon Creer, Martin Llewellyn, Martin I. Taylor, Gary Carvalho, Kevin Glover

Royal Society Open Science 6

2019

Flesh quality of Atlantic salmon smolts reared at different temperatures and photoperiods

Albert Imsland, Bjørn Roth, Inge Døskeland, Per Gunnar Fjelldal, Sigurd Olav Stefansson, Sigurd O Handeland, Bjørn Mikalsen

Aquaculture Research 50 p. 1795-1801

2019

The influence of vgll3 genotypes on sea age at maturity is altered in farmed mowi strain Atlantic salmon

Fernando Ayllon, Monica Favnebøe Solberg, Kevin Glover, Faezeh Mohammadi, Erik Nordtorp Kjærner-Semb, Per Gunnar Fjelldal, Eva Andersson, Tom Johnny Hansen, Rolf Edvardsen, Anna Wargelius

BMC Genetics 20:44 p. 1-8

2019

Experimental investigation of the effects of temperature and feeding regime on scale growth in Atlantic salmon Salmo salar post-smolts

Katie Thomas, Tom Johnny Hansen, Deirdre Brophy, Niall O Maoileidigh, Per Gunnar Fjelldal

Journal of Fish Biology 94 p. 896-908

2019

Bone without minerals and its secondary mineralization in atlantic salmon (Salmo salar): The recovery from phosphorus deficiency

Paul Eckhard Witten, Per Gunnar Fjelldal, Ann Huysseune, Charles McGurk, Alex Obach, Matthew A.G. Owen

Journal of Experimental Biology 222

2019

Termination of puberty in out-of-season male Atlantic salmon smolts

Thomas Fraser, Per Gunnar Fjelldal, Rüdiger W. Schulz, Birgitta Norberg, Tom Johnny Hansen

Comparative Biochemistry and Physiology A 232 p. 60-66

2018

Growth and welfare of submerged Atlantic salmon under continuous lighting

Michael Sievers, Øyvind Johan Korsøen, Timothy David Dempster, Per Gunnar Fjelldal, Tore S Kristiansen, Ole Folkedal, Frode Oppedal

Aquaculture Environment Interactions 10 p. 501-510

2018

Growth and welfare of submerged Atlantic salmon under continuous lightning

Michael Sievers, Øyvind Johan Korsøen, Timothy David Dempster, Per Gunnar Fjelldal, Tore S Kristiansen, Ole Folkedal, Frode Oppedal

Aquaculture Environment Interactions 10 p. 501-510

2018

Radiological changes during fracture and repair in neural and haemal spines of Atlantic cod (Gadus morhua)

Per Gunnar Fjelldal, Terje van der Meeren, Thomas Fraser, Florian Sambraus, Laith A. Jawad, Tom Johnny Hansen

Journal of Fish Diseases 41 p. 1871-1875

2018

Vertebral column deformity in adult wild haddock(Melanogrammus aeglefinus)

Laith A. Jawad, Tom Johnny Hansen, Sonnich Meier, Jon Egil Skjæraasen, Per Gunnar Fjelldal

Journal of Fish Diseases 41 p. 1909-1915

2018

Documentation of multiple species of marine fish trapped in Atlantic salmon sea-cages in Norway

Per Gunnar Fjelldal, Monica Favnebøe Solberg, Kevin Glover, Ole Folkedal, Jonatan Nilsson, Roderick Nigel Finn, Tom Johnny Hansen

Aquatic Living Resources 31

2018

Sexual maturation and smoltification in domesticated Atlantic salmon (Salmo salar L.) - is there a developmental conflict?

Per Gunnar Fjelldal, Rüdiger W. Schulz, Tom Ole Nilsen, Eva Andersson, Birgitta Norberg, Tom Johnny Hansen

Physiological Reports 6 p. 1-18

2018

Judging a salmon by its spots: Environmental variation is the primary determinant of spot patterns in Salmo salar

Katarina Mariann Jørgensen, Monica Favnebøe Solberg, Francois Besnier, Anders Thorsen, Per Gunnar Fjelldal, Øystein Skaala, Ketil Malde, Kevin Glover

BMC Ecology 18:14 p. 1-13

2018

Mineral nutrition and bone health in salmonids

Grete Bæverfjord, Antony Prabhu, Per Gunnar Fjelldal, Sissel Albrektsen, Bjarne Hatlen, Vegard Denstadli, Elisabeth Ytteborg, Harald Rune Takle, Erik-Jan Lock, Marc Berntssen, Anne-Katrine Lundebye, Torbjørn Einar Åsgård, Rune Waagbø

Reviews in Aquaculture p. 1-26

2018

Vgll3 and the Hippo pathway are regulated in Sertoli cells upon entry and during puberty in Atlantic salmon testis

Erik Nordtorp Kjærner-Semb, Fernando Ayllon, Lene Kleppe, Elin Sørhus, Kai Ove Skaftnesmo, Tomasz Furmanek, Frida Thyri Segafredo, Anders Thorsen, Per Gunnar Fjelldal, Tom Johnny Hansen, Geir Lasse Taranger, Eva Andersson, Rüdiger W. Schulz, Anna Wargelius, Rolf Edvardsen

Scientific Reports 8:1912 p. 1-11

2018

Changes in water temperature and oxygen: the effect of triploidy on performance and metabolism in large farmed Atlantic salmon

Florian Sambraus, Mette Remen, Rolf Erik Olsen, Tom Johnny Hansen, Rune Waagbø, Thomas Torgersen, Erik-Jan Lock, Albert Imsland, Thomas Fraser, Per Gunnar Fjelldal

Aquaculture Environment Interactions 10 p. 157-172

2018

Späte Laichreife und spontane Triploidie bei Saiblingen - hängt natürliche Aneuploidie mit Fehlentwicklungen und Absterben der Embryos zusammen?

Viktor Schwinger, Ronny Seyfried, Dennis M Kallert, Per Gunnar Fjelldal, Florian Baierl, Ievgen Lebeda, Thomas Speierl, Jens-Eike Täubert, Martin Flashans

2017

Effects of temperature on feed intake and plasma chemistry after exhaustive exercise in triploid brown trout (Salmo trutta L).

Andrew C. Preston, John F. Taylor, Per Gunnar Fjelldal, Tom Johnny Hansen, Hervé Migaud

43 p. 337-350

2017

The notochord in Atlantic salmon (Salmo salar L.) undergoes profound morphological and mechanical changes during development

Harald Kryvi, Iselin Rusten, Per Gunnar Fjelldal, Kari Nordvik, Geir Kåre Totland, Tine Veronica Karlsen, Helge Wiig, John H. Long

Journal of Anatomy 231 p. 639-654

2017

Sex steroid production associated with puberty is absent in germ cellfree salmon

Lene Kleppe, Eva Andersson, Kai Ove Skaftnesmo, Rolf Edvardsen, Per Gunnar Fjelldal, Birgitta Norberg, Jan Bogerd, Rüdiger W. Schulz, Anna Wargelius

Scientific Reports 7

2017

Rapid growth causes abnormal vaterite formation in farmed fish otoliths

Tormey Reimer, Timothy David Dempster, Anna Wargelius, Per Gunnar Fjelldal, Tom Johnny Hansen, Kevin Glover, Monica Favnebøe Solberg, Stephen E. Swearer

Journal of Experimental Biology 220 p. 2965-2969

2017

The effect of continuous light at low temperatures on growth in Atlantic salmon reared in commercial size sea pens

Albert Imsland, Bjørn Roth, Per Gunnar Fjelldal, Sigurd Olav Stefansson, Sigurd O Handeland, Bjørn Mikalsen

Aquaculture 479 p. 645-651

2017

Cloned and outbred Atlantic salmon display equal parasite dispersion when infected with the salmon louse

Kevin Glover, Tom Johnny Hansen, Francois Besnier, Monica Favnebøe Solberg, Per Gunnar Fjelldal, Anne Grete Eide Sørvik, Sussie Dalvin, Frank Nilsen

Aquaculture 480 p. 83-88

2017

Triploid atlantic salmon (Salmo salar L.) postsmolts accumulate prevalence more slowly than diploid salmon following bath challenge with salmonid alphavirus subtype 3

Lindsey Moore, Tom Ole Nilsen, Jiraporn Jarungsriapisit, Per Gunnar Fjelldal, Sigurd Olav Stefansson, Geir Lasse Taranger, Sonal Patel

PLOS ONE 12:e0175468 p. 1-12

2017

Effects of light source and intensity on sexual maturation, growth and swimming behaviour of Atlantic salmon in sea cages

Tom Johnny Hansen, Per Gunnar Fjelldal, Ole Folkedal, Tone Vågseth, Frode Oppedal

Aquaculture Environment Interactions p. 193-204

2017

Water temperature and dietary histidine affect cataract formation in Atlantic salmon (Salmo salar L.) diploid and triploid yearling smolt

Florian Sambraus, Per Gunnar Fjelldal, Sofie C. Remø, Ernst Morten Hevrøy, Tom Ole Nilsen, Anders Thorsen, Tom Johnny Hansen, Rune Waagbø

Journal of Fish Diseases 40 p. 1195-1212

2017

Water temperature and oxygen: The effect of triploidy on performance and metabolism in farmed Atlantic salmon (Salmo salar L.) post-smolts

Florian Sambraus, Rolf Erik Olsen, Mette Remen, Tom Johnny Hansen, Thomas Torgersen, Per Gunnar Fjelldal

Aquaculture 473 p. 1-12

2017

Ploidy elicits a whole-genome dosage effect: growth of triploid Atlantic salmon is linked to the genetic origin of the second maternal chromosome set

Alison C. Harvey, Per Gunnar Fjelldal, Monica Favnebøe Solberg, Tom Johnny Hansen, Kevin Glover

BMC Genetics 18:34 p. 1-12

2016

Pulse trawl fishing: characteristics of the electrical stimulation and the effect on behaviour and injuries of Atlantic cod(Gadus morhua)

Dick de Haan, Jan Erik Fosseidengen, Per Gunnar Fjelldal, Dirk Burggraaf, A.D. Rijnsdorp

ICES Journal of Marine Science 73 p. 1557-1569

2016

Exophthalmia in wild-caught cod (Gadus morhua L.): development of a secondary barotrauma effect in captivity

Odd Børre Humborstad, Keno Ferter, Harald Kryvi, Per Gunnar Fjelldal

Journal of Fish Diseases 40 p. 41-49

2016

The vertebral column and exercise in Atlantic salmon — Regional effects

Frida Solstorm, David Solstorm, Frode Oppedal, Per Gunnar Fjelldal

Aquaculture 461 p. 9-16

2016

Epithelial Label-Retaining Cells Are Absent during Tooth Cycling in Salmo salar and Polypterus senegalus

Sam Vandenplas, Maxime Willems, P. Eckhard Witten, Tom Johnny Hansen, Per Gunnar Fjelldal, Ann Huysseune

PLOS ONE

2016

Atlantic salmon (Salmo salar L.) post-smolts challenged two or nine weeks after seawater-transfer show differences in their susceptibility to salmonid alphavirus subtype 3 (SAV3)

Jiraporn Jarungsriapisit, Lindsey Moore, Geir Lasse Taranger, Tom Ole Nilsen, Hugh Craig Morton, Ingrid Uglenes Fiksdal, Sigurd Olav Stefansson, Per Gunnar Fjelldal, Øystein Evensen, Sonal Patel

Virology Journal 13

2016

Auto-Adhesion Potential of Extraocular Aqp0 during Teleost Development

Francois Chauvigné, Per Gunnar Fjelldal, Joan Cerdà, Roderick Nigel Finn

PLOS ONE 11

2016

The effect of low temperatures and photoperiods on growth and vertebra morphometry in Atlantic salmon

Inge Døskeland, Albert Imsland, Per Gunnar Fjelldal, Sigurd Olav Stefansson, Bjørn Roth, Katrine Eikeland Eriksen, Bjørn Mikalsen, Sigurd Olav Handeland

Aquaculture International 24 p. 1421-1434

2016

Effects of temperature on feed intake and plasma chemistry after exhaustive exercise in triploid brown trout (Salmo trutta L)

Andrew C. Preston, John F. Tylor, Per Gunnar Fjelldal, Tom Johnny Hansen, Hevré Migaud

Fish Physiology & Biochemistry p. 1-14

2016

Performance of triploid Atlantic cod (Gadus morhua L.) in commercial aquaculture

Håkon Magne Otterå, Anders Thorsen, Ørjan Karlsen, Per Gunnar Fjelldal, Hugh Craig Morton, Geir Lasse Taranger

Aquaculture 464 p. 699-709

2016

Record of Litter Ingestion by Cod (Gadus morhua) Collected from Masfjorden, Western Norway

Laith A. Jawad, Odd Børre Humborstad, Per Gunnar Fjelldal

International Journal of Marine Science

2016

First report on vertebral abnormality in the fivebeard rockling Ciliata mustela (Linnaeus, 1758) (Osteichthyes: Lotidae) from Masfjorden, Western Norway

L.A Jawad, Per Gunnar Fjelldal, Tom Johnny Hansen

Marine Biodiversity p. 1-5

2016

Salmonid fish: model organisms to study cardiovascular morphogenesis in conjoined twins?

Per Gunnar Fjelldal, Monica Favnebøe Solberg, Tom Johnny Hansen, Tone Vågseth, Kevin Glover, Harald Kryvi

BMC Developmental Biology 16:25

2016

Effects of temperature on the final stages of sexual maturation in Atlantic salmon (Salmo salar L.)

Erik J.M Vikingstad, Eva Andersson, Tom Johnny Hansen, Birgitta Norberg, Ian Mayer, Sigurd Olav Stefansson, Per Gunnar Fjelldal, Geir Lasse Taranger

Fish Physiology & Biochemistry 42 p. 895-907

2016

Increased dietary phosphorous prevents vertebral deformities in triploid Atlantic salmon (Salmo salar L.)

Per Gunnar Fjelldal, Tom Johnny Hansen, Erik-Jan Lock, Anna Wargelius, Thomas Fraser, Florian Sambraus, A. El-Mowafi, Sissel Albrektsen, Rune Waagbø, Robin Ørnsrud

Aquaculture Nutrition 22 p. 72-90

2015

Mass marking farmed Atlantic salmon with transgenerational isotopic fingerprints to trace farm fish escapees

Fletcher Warren-Myers, Timothy David Dempster, Per Gunnar Fjelldal, Tom Johnny Hansen, Stephen E. Swearer

Aquaculture Environment Interactions 7 p. 75-87

2015

Pug-headedness in the farmed triploid Atlantic cod, Gadus morhua Linnaeus, 1758 (Actinopterygii: Gadiformes: Gadidae) in Norway

Laith A. Jawad, Anders Thorsen, Håkon Magne Otterå, Per Gunnar Fjelldal

Acta Adriatica 56 p. 291-296

2015

Piscine orthoreovirus (PRV) in red and melanised foci in white muscle of Atlantic salmon (Salmo salar)

Håvard Bjørgen, Øystein Wessel, Per Gunnar Fjelldal, Tom Johnny Hansen, Harald Sveier, Håkon Rydland Sæbø, Katrine Bones Enger, Erik Monsen, Agnar Ståle Kvellestad, Espen Rimstad, Erling Olaf Koppang

Veterinary research (VR) 46:89

2015

Increased reactivity and monoamine dysregulation following stress in triploid Atlantic salmon (Salmo salar)

Thomas Fraser, Marco Antonio Vindas, Per Gunnar Fjelldal, Svante Winberg, Per-Ove Thörnqvist, Øyvind Øverli, Jon Egil Skjæraasen, Tom Johnny Hansen, Ian Mayer

Comparative Biochemistry and Physiology A 185 p. 125-131

2015

The frequency of spontaneous triploidy in farmed Atlantic salmon produced in Norway during the period 2007–2014

Kevin Glover, Abdullah Sami Madhun, Geir Dahle, Anne Grete Eide Sørvik, Vidar Wennevik, Øystein Skaala, Hugh Craig Morton, Tom Johnny Hansen, Per Gunnar Fjelldal

BMC Genetics 16

2015

A report on overripe female and spent male Atlantic salmon (Salmo salar) in August

Tom Johnny Hansen, Mette Remen, Florian Sambraus, Per Gunnar Fjelldal

Aquaculture 444 p. 114-116

2015

Androgens directly stimulate spermatogonial differentiation in juvenile Atlantic salmon (Salmo salar)

Michelle C. Melo, Petra van Dijk, Eva Andersson, Tom Ole Nilsen, Per Gunnar Fjelldal, Rune Male, Wouter Nijenhuis, Jan Bogerd, Luiz Renato de França, Geir Lasse Taranger, Rüdiger W. Schulz

General and Comparative Endocrinology 211 p. 52-61

2015

Dive to survive: effects of capture depth on barotrauma and post-release survival of Atlantic cod (Gadus morhua) in recreational fisheries

Keno Ferter, Marc Simon Weltersbach, Odd Børre Humborstad, Per Gunnar Fjelldal, Florian Sambraus, Harry Vincent Strehlow, Jon Helge Vølstad

ICES Journal of Marine Science 72 p. 2467-2481

2015

The interbranchial lymphoid tissue of Atlantic Salmon (Salmo salar L) extends as a diffuse mucosal lymphoid tissue throughout the trailing edge of the gill filament

Alf Seljenes Dalum, Lars Austbø, Håvard Bjørgen, Karsten Skjødt, Ivar Hordvik, Tom Johnny Hansen, Per Gunnar Fjelldal, Charles McLean Press, David Griffiths, Erling Olaf Koppang

Journal of morphology 276 p. 1075-1088

2015

An Industry-Scale Mass Marking Technique for Tracing Farmed Fish Escapees

Fletcher Warren-Myers, Tim Demster, Per Gunnar Fjelldal, Tom Johnny Hansen, Stephen E. Swearer

PLOS ONE 10

2015

Immersion during egg swelling results in rapid uptake of stable isotope markers in salmonid otoliths

Fletcher Warren-Myers, Tim Dempster, Per Gunnar Fjelldal, Tom Johnny Hansen, Stephen E. Swearer

Canadian Journal of Fisheries and Aquatic Sciences 72 p. 722-727

2015

The prevalence of vertebral deformities is increased with higher egg incubation temperatures and triploidy in Atlantic salmon Salmo salar L.

Thomas Fraser, Tom Johnny Hansen, Mitchell Fleming, Per Gunnar Fjelldal

Journal of Fish Diseases 38 p. 75-89

2015

Effect of water oxygen level on performance of diploid and triploid Atlantic salmon post-smolts reared at high temperature

Tom Johnny Hansen, Rolf Erik Olsen, Lars Helge Stien, Frode Oppedal, Thomas Torgersen, Olav Breck, Mette Remen, Tone Vågseth, Per Gunnar Fjelldal

Aquaculture 435 p. 354-360

2015

Vaccination and triploidy increase relative heart weight in farmed Atlantic salmon, Salmo salar L

Tom Fraser, Ian Mayer, Tom Johnny Hansen, Trygve Poppe, Jon Egil Skjæraasen, Erling Olaf Koppang, Per Gunnar Fjelldal

Journal of Fish Diseases 38 p. 151-160

2014

Hatching time and alevin growth prior to the onset of exogenous feeding in farmed, wild and hybrid Norwegian Atlantic salmon

Monica Favnebøe Solberg, Per Gunnar Fjelldal, Frank Nilsen, Kevin Glover

PLOS ONE 9

2014

Developmental stability in vaccinated Atlantic salmon (Salmo salar L.): Deformities and fluctuating asymmetry of bone structures

A. O. Yurtseva, D. L. Lajus, Arne Erik Berg, Per Gunnar Fjelldal, Tom Johnny Hansen

Paleontological journal 48 p. 1266-1274

2014

The effect of triploidy on the efficacy and physiological response to anesthesia with MS 222 and isoeugenol in Atlantic salmon post-smolts

Tom Fraser, Ian Mayer, Jon Egil Skjæraasen, Tom Johnny Hansen, Per Gunnar Fjelldal

Aquaculture International 22 p. 1347-1359

2014

Triploid and diploid Atlantic salmon show similar susceptibility to infection with salmon lice Lepeophtheirus salmonis

Benedikt Frenzl, Herve Migaud, Per Gunnar Fjelldal, Andrew P. Shinn, John F. Taylor, Randolph H. Richards, Kevin Glover, David Cockerill, James Emmanuel Bron

Pest Management Science 70 p. 982-988

2014

Triploid (sterile) farmed Atlantic salmon males attempt to spawn with wild females

Per Gunnar Fjelldal, Vidar Wennevik, I.A Fleming, Tom Johnny Hansen, Kevin Glover

Aquaculture Environment Interactions 5

2014

Vertebra deformities in wild Atlantic salmon caught in the Figgjo River, southwest Norway

Florian Sambraus, Kevin Glover, Tom Johnny Hansen, Tom Fraser, Monica Favnebøe Solberg, Per Gunnar Fjelldal

Journal of Applied Ichthyology 30 p. 777-782

2014

Hybrid salmonids: Ploidy effect on skeletal meristic characteristics and sea lice infection susceptibility

Mitchell Fleming, Tom Johnny Hansen, Ole Fredrik Skulstad, Kevin Glover, Hugh Craig Morton, Leif Asbjørn Vøllestad, Per Gunnar Fjelldal

Journal of Applied Ichthyology 30 p. 746-752

2014

On the record of pug-headedness in cultured Atlantic salmon, Salmo salar Linnaeus, 1758 (Salmoniformes, Salmonidae) from Norway

Laith A. Jawad, Armin Kousha, Florian Sambraus, Per Gunnar Fjelldal

Journal of Applied Ichthyology 30 p. 537-539

2014

Aplasia of the septum transversum has no effect on plasma biochemistry following an acute hypoxic event in Atlantic salmon

Tom Fraser, Per Gunnar Fjelldal, Tom Johnny Hansen, Frode Oppedal, Rolf Erik Olsen, Tone Vågseth, Mette Remen

Diseases of Aquatic Organisms 111 p. 87-92

2014

The effect of triploidy on vaccine side-effects in Atlantic salmon

Tom Fraser, Tom Johnny Hansen, Ian Mayer, Jon Egil Skjæraasen, Kevin Glover, Florian Sambraus, Per Gunnar Fjelldal

Aquaculture 433 p. 481-490

2014

Osmotic induction improves batch marking of larval Fish otoliths with enriched stable isotopes

Emmanuel de Braux, Fletcher Warren-Myers, Tim Demster, Per Gunnar Fjelldal, Tom Johnny Hansen, Stephen E. Swearer

ICES Journal of Marine Science 71 p. 2530-2538

2014

Immune parameters in the intestine of wild and reared unvaccinated and vaccinated Atlantic salmon (Salmo salar L.)

Guro Løkka, Lars Austbø, Knut Falk, Erin Bromage, Per Gunnar Fjelldal, Tom Johnny Hansen, Ivar Hordvik, Erling Olaf Koppang

Developmental and Comparative Immunology 47 p. 6-16

2014

Salinity and photoperiod modulate pubertal development in Atlantic salmon (Salmo salar)

Michelle Melo, Eva Andersson, Per Gunnar Fjelldal, Jan Bogerd, Luiz R. Franca, Geir Lasse Taranger, RW Schulz

Journal of Endocrinology 220 p. 319-332

2014

The effect of ploidy and incubation temperature on survival and the prevalence of aplasia of the septum transversum in Atlantic salmon, Salmo salar L

Tom Fraser, Mitchell Fleming, Trygve Poppe, Tom Johnny Hansen, Per Gunnar Fjelldal

Journal of Fish Diseases 37 p. 189-200

2014

The effect of vaccination, ploidy and smolt production regime on pathological melanin depositions in muscle tissue of Atlantic salmon, Salmo salar L

Hilde Larsen, Lars Austbø, Ane Nødtvedt, Tom Fraser, Espen Rimstad, Per Gunnar Fjelldal, Tom Johnny Hansen, Erling Olaf Koppang

Journal of Fish Diseases 37 p. 327-340

2013

The effect of triploidy on the culture performance, deformity prevalence, and heart morphology in Atlantic salmon

Tom Fraser, Tom Johnny Hansen, Jon Egil Skjæraasen, Ian Mayer, Florian Sambraus, Per Gunnar Fjelldal

Aquaculture 416-417 p. 255-264

2013

Establishing an upper level of intake for vitamin A in Atlantic salmon (Salmo salar L.) postsmolts

Robin Ørnsrud, Erik-Jan Lock, Rune Waagbø, Christel Krossøy, Per Gunnar Fjelldal

Aquaculture Nutrition 19 p. 651-664

2013

Regional changes in vertebra morphology during ontogeny reflect the life history of Atlantic cod (Gadus morhua L.)

Per Gunnar Fjelldal, Geir Kåre Totland, Tom Johnny Hansen, Harald Kryvi, Xiyuan Wang, Jens L. Søndergaard, Sindre Grotmol

Journal of Anatomy 222 p. 615-624

2013

The effect of triploidization of Atlantic cod (Gadus morhua L.) on survival, growth and deformities during early life stages

Ingegjerd Opstad, Per Gunnar Fjelldal, Ørjan Karlsen, Anders Thorsen, Tom Johnny Hansen, Geir Lasse Taranger

Aquaculture 388 p. 54-59

2013

Comparative analysis of IgM sub-variants in salmonid fish and identification of a residue in mu 3 which is essential for MAb4C10 reactivity

Atif Kamil, Arnt Johan Raae, Per Gunnar Fjelldal, Erling Olaf Koppang, Kari Espolin Fladmark, Ivar Hordvik

Fish and Shellfish Immunology 34 p. 667-672

2012

Triploidy alters brain morphology in pre-smolt Atlantic salmon Salmo salar: possible implications for behaviour

Tom Fraser, Per Gunnar Fjelldal, Jon Egil Skjæraasen, Tom Johnny Hansen, Ian Mayer

Journal of Fish Biology 81 p. 2199-2212

2012

Vaccination and elevated dietary phosphorus reduces the incidence of early sexual maturation in Atlantic salmon (Salmo salar L.)

Per Gunnar Fjelldal, Albert Imsland, Tom Johnny Hansen

Aquaculture 364 p. 333-337

2012

Dietary phosphorus does not reduce the risk for spinal deformities in a model of adjuvant-induced inflammation in Atlantic salmon (Salmo salar) postsmolts

Laura Gil Martens, Per Gunnar Fjelldal, Erik-Jan Lock, Anna Sofie Troedsson Wargelius, Heidrun Inger Wergeland, P. Eckhard Witten, Tom Johnny Hansen, Rune Waagbø, Robin Ørnsrud

Aquaculture Nutrition 18 p. 12-20

2012

The effect of triploidy and vaccination on neutrophils and B-cells in the peripheral blood and head kidney of 0+ and 1+ Atlantic salmon (Salmo salar L.) post-smolts

Tom Fraser, Anita Rønneseth, Gyri Teien Haugland, Per Gunnar Fjelldal, Ian Mayer, Heidrun Inger Wergeland

Fish and Shellfish Immunology 33 p. 60-66

2012

Inadequate phosphorus nutrition in juvenile Atlantic salmon has a negative effect on long-term bone health

Per Gunnar Fjelldal, Tom Johnny Hansen, Sissel Albrektsen

Aquaculture 334 p. 117-123

2012

Welfare Considerations of Triploid Fish

Tom Fraser, Per Gunnar Fjelldal, Tom Johnny Hansen, Ian Mayer

Reviews in fisheries science 20 p. 192-211

2012

Continuous light induces bone resorption and affects vertebral morphology in Atlantic salmon (Salmo salar L.) fed a phosphorous deficient diet

Per Gunnar Fjelldal, Erik-Jan Lock, Tom Johnny Hansen, Rune Waagbø, Anna Wargelius, Laura Gil Martens, Adel El-Mowafi, Robin Ørnsrud

Aquaculture Nutrition 18 p. 610-619

2012

The pattern of the lower jaw dentition in farmed Atlantic salmon (Salmo salar): a tool to study mechanisms of tooth replacement?

Ann Huysseune, Sam Vandenplas, B. De Groeve, Per Gunnar Fjelldal, Tom Johnny Hansen

Journal of Applied Ichthyology 28 p. 330-335

2012

Vaccinated farmed Atlantic salmon are susceptible to spinal and skull deformities

Arne Erik Berg, Anastasia Yurtseva, Tom Johnny Hansen, Dmitry Lajus, Per Gunnar Fjelldal

Journal of Applied Ichthyology 28 p. 446-452

2012

Vertebral deformities in farmed Atlantic salmon (Salmo salar L.) - etiology and pathology

Per Gunnar Fjelldal, Tom Johnny Hansen, Olav Breck, Robin Ørnsrud, Erik-Jan Lock, Rune Waagbø, Anna Wargelius, Paul Eckhard Witten

Journal of Applied Ichthyology 28 p. 433-440

2011

The culturable intestinal microbiota of triploid and diploid juvenile Atlantic salmon (Salmo salar) - a comparison of composition and drug resistance

Leon Cantas, Tom Fraser, Per Gunnar Fjelldal, Ian Mayer, Henning Sørum

BMC Veterinary Research 7

2011

Sustained swimming increases the mineral content and osteocyte density of salmon vertebral bone

Geir Kåre Totland, Per Gunnar Fjelldal, Harald Kryvi, Guro Løkka, Anna Sofie Troedsson Wargelius, Anita Sagstad, Tom Johnny Hansen, Sindre Grotmol

Journal of Anatomy 219 p. 490-501

2011

Dietary decontaminated fish oil has no negative impact on fish performance, flesh quality or production-related diseases in Atlantic salmon (Salmo salar)

Erik-Jan Lock, Per Gunnar Fjelldal, Bente Elisabeth Torstensen, Marit Bjørnevik, Olav Breck, J. Johansen, P. Reynolds, Trygve Sigholt, Nanne Joerum, Jan Vidar Jakobsen, Kari Ruohonen, Rune Waagbø, Marc Berntssen

Aquaculture Nutrition 17 p. E760-E772

2011

Continuous light and elevated temperature can trigger maturation both during and immediately after smoltification in male Atlantic salmon (Salmo salar)

Per Gunnar Fjelldal, Tom Johnny Hansen, Tien-Sheng Huang

Aquaculture 321 p. 93-100

2011

Comparative seawater performance and deformity prevalence in out-of-season diploid and triploid Atlantic salmon (Salmo salar) post-smolts

E Leclercq, J. Taylor, D Fison, Per Gunnar Fjelldal, M Diez-Padrisa, Tom Johnny Hansen, H Migaud

Comparative Biochemistry and Physiology - Part A: Comparative Physiology 158 p. 116-125

2011

The effect of water temperature on vertebral deformities and vaccine-induced abdominal lesions in Atlantic salmon, Salmo salar L

Ane Grini, Tom Johnny Hansen, Arne Berg, Anna Wargelius, Per Gunnar Fjelldal

Journal of Fish Diseases 34 p. 531-546

2010

Growth and tissue mineralisation of Atlantic cod (Gadus Morhua) fed soluble P and Ca salts in the diet

Katerina Kousoulaki, Per Gunnar Fjelldal, Anders Aksnes, Sissel Albrektsen

Aquaculture 309 p. 181-192

2010

Effects of vegetable feed ingredients on bone health in Atlantic salmon

Per Gunnar Fjelldal, Ulla Nordgarden, Anna Wargelius, Geir Lasse Taranger, Rune Waagbø, Rolf Erik Olsen

Journal of Applied Ichthyology 26 p. 327-333

2010

Dietary fatty acids and inflammation in the vertebral column of Atlantic salmon, Salmo salar L., smolts: a possible link to spinal deformities

Laura Gil Martens, ERIK-JAN LOCK, Per Gunnar Fjelldal, Anna Wargelius, HERNANDEZ PEDRO W ARAUJO, BENTE ELISABETH TORSTENSEN, P. Eckhard Witten, Tom Hansen, Rune Waagbø, ROBIN ØRNSRUD

Journal of Fish Diseases 33 p. 957-972

2010

Diurnal expression of clock genes in pineal gland and brain and plasma levels of melatonin and cortisol in atlantic salmon parr and smolts

Tien-Sheng Huang, Peter Ruoff, Per G. Fjelldal

Chronobiology International 27 p. 1697-1714

2010

MMP-13 (Matrix MetalloProteinase 13) expression might be an indicator for increased ECM remodeling and early signs of vertebral compression in farmed Atlantic salmon (Salmo salar L.)

Anna Wargelius, Per Gunnar Fjelldal, Ane Grini, Laura Gil-Martens, Bjørn Olav Kvamme, Tom Hansen

Journal of Applied Ichthyology 26 p. 366-371

2010

EFFECT OF CONTINUOUS LIGHT ON DAILY LEVELS OF PLASMA MELATONIN AND CORTISOL AND EXPRESSION OF CLOCK GENES IN PINEAL GLAND, BRAIN, AND LIVER IN ATLANTIC SALMON POSTSMOLTS

Tien-Sheng Huang, Peter Ruoff, Per G. Fjelldal

Chronobiology International 27 p. 1715-1734

2010

Vertebral deformities in triploid Atlantic salmon (Salmo salar L.) underyearling smolts

Per Gunnar Fjelldal, Tom Johnny Hansen

Aquaculture 309 p. 131-136

2010

A possible relation between growth and number of deformed vertebrae in Atlantic Salmon (Salmo salar L.)

Tom Johnny Hansen, Per Gunnar Fjelldal, Anastasia Yurtseva, Arne Erik Berg

Journal of Applied Ichthyology 26 p. 355-359

2010

Collagen type XI alpha 1 may be involved in the structural plasticity of the vertebral column in Atlantic salmon (Salmo salar L.)

Anna Wargelius, Per Gunnar Fjelldal, Ulla Nordgarden, Ane Grini, Christel Krossøy, Sindre Grotmol, Geir Kåre Totland, Tom Hansen

Journal of Experimental Biology 213 p. 1207-1216

2009

Supplementation of dietary minerals during the early seawater phase increase vertebral strength and reduce the prevalence of vertebral deformities in fast-growing under-yearling Atlantic salmon (Salmo salar L.) smolt

P.G. Fjelldal, Tom Johnny Hansen, Olav Breck, R. Sandvik, Rune Waagbø, A. Berg, ROBIN ØRNSRUD

Aquaculture Nutrition 15 p. 366-378

2009

Long-term culture of Atlantic salmon (Salmo salar L.) in submerged cages during winter affects behaviour, growth and condition

Øyvind Johan Korsøen, Timothy David Dempster, Per Gunnar Fjelldal, Frode Oppedal, Tore S Kristiansen

Aquaculture 296 p. 373-381

2009

Continuous light affects mineralization and delays osteoid incorporation in vertebral bone of Atlantic salmon (Salmo Salar L.)

Anna Wargelius, Per Gunnar Fjelldal, Ulla Nordgarden, Tom Johnny Hansen

Journal of Experimental Biology 212 p. 656-661

2009

A radiological study on vertebral deformities in cultured and wild Atlantic cod (Gadus morhua, L.)

Per Gunnar Fjelldal, Terje van der Meeren, Knut Eirik Jørstad, Tom Johnny Hansen

Aquaculture 289 p. 6-12

2009

Digestive efficiency, free amino acid pools and quality of growth performance in Atlantic salmon (Salmo salar L.) affected by light regimes and vaccine types

Krisna Rungruangsak-Torrissen, Jan Sunde, Arne Erik Berg, Ulla Nordgarden, Per Gunnar Fjelldal, Frode Oppedal

Fish Physiology & Biochemistry 35 p. 255-272

2009

Vertebral body mineralization and deformities in cultured Atlantic salmon (Salmo salar L.): Effects of genetics and off-season smolt production

Per Gunnar Fjelldal, Kevin A. Glover, Øystein Skaala, Albert Imsland, Tom Johnny Hansen

Aquaculture 296 p. 36-44

2009

Dietary menadione nicotinamide bisulphite (vitamin K-3) does not affect growth or bone health in first-feeding fry of Atlantic salmon (Salmo salar L.)

Christel Krossøy, Rune Waagbø, Per Gunnar Fjelldal, Anna Wargelius, ERIK-JAN LOCK, Ingvild Eide Graff, ROBIN ØRNSRUD

Aquaculture Nutrition 15 p. 638-649

2007

A radiological study on the development of vertebral deformities in cultured Atlantic salmon (Salmo salar L)

Arne Erik Berg, Tom Johnny Hansen, Per Gunnar Fjelldal

Aquaculture 273 p. 721-728

2007

The mineral content affects vertebral morphology in underyearling smolt of Atlantic salmon (Salmo salar L.)

Per Gunnar Fjelldal, Tom Johnny Hansen, Ulla Nordgarden

Aquaculture 270 p. 231-239

2006

Growth hormone and insulin-like growth factor-I act together and independently when regulating growth in vertebral and muscle tissue of Atlantic salmon postsmolts

Ulla Nordgarden, Per Gunnar Fjelldal, Tom Johnny Hansen, Bjørn Thrandur Bjørnsson, Anna Wargelius

General and Comparative Endocrinology 149 p. 253-260

2006

Impact of smolt production strategy on vertebral growth and mineralisation during smoltification and the early seawater phase in Atlantic salmon (Salmo salar, L.)

P.G. Fjelldal, E.J. Lock, Sindre Grotmol, Geir Kåre Totland, U. Nordgarden, G. Flik, T. Hansen

Aquaculture 261 p. 715-728

2005

A peak in gh-receptor expression is associated with growth activation in Atlantic salmon vertebrae, while upregulation of igf-I receptor expression is related to increased bone density

Anna Wargelius, Per Gunnar Fjelldal, Tom Johnny Hansen, Bjørn Thrandur Bjørnsson, Ulla Nordgarden, Susana Benedet

General and Comparative Endocrinology 142 p. 163-168

2005

Heat shock during early somitogenesis induces caudal vertebral column defects in Atlantic salmon (Salmo salar)

Anna Wargelius, Per Gunnar Fjelldal, Tom Johnny Hansen

Development, Genes and Evolution 215 p. 350-357

2005

Vertebrae of the trunk and tail display different growth rates in response to photoperiod in Atlantic salmon, Salmo salar L., post-smolts

Per Gunnar Fjelldal, Ulla Nordgarden, Arne Erik Berg, Anna Wargelius, Sindre Grotmol, Geir Kåre Totland, Tom Johnny Hansen

Aquaculture 250 p. 516-524

2004

Spring growth in the vertebrae of Atlantic salmon (Salmo salar) is characterized by a gradual increase in ihh expression, while a certain photoperiod triggers shh induction

Tom Johnny Hansen, Arne Erik Berg, Per Gunnar Fjelldal, Anna Wargelius, Ulla Nordgarden

Journal of Bone and Mineral Research 19 p. 217

2004

Pinealectomy induces malformation of the spine and reduces the mechanical strength of the vertebrae in Atlantic salmon, Salmo salar

PG Fjelldal, Sindre Grotmol, Harald Kryvi, Nils Roar Gjerdet, GL Taranger, Tom Hansen, MJR Porter, Geir Kåre Totland

Journal of Pineal Research 36 p. 132-139

2001

Three forms of GnRH in the brain and pituitary of the turbot, Scophtalmus maximus: immunological characterization and seasonal variation

Eva Andersson, Per Gunnar Fjelldal, Ulrike Klenke, Erik J.M Vikingstad, Geir Lasse Taranger, Yonathan Zohar, Sigurd Stefansson

Comparative Biochemistry and Physiology - Part B: Biochemistry & Molecular Biology 129 p. 551-558

Other journal contributions

2019

Corrigendum to “Termination of puberty in out-of-season male Atlantic salmon smolts” (Comparative Biochemistry and Physiology, Part A (2019) 232 (60–66), (S1095643318302010), (10.1016/j.cbpa.2019.03.011))

Thomas Fraser, Per Gunnar Fjelldal, Rüdiger W. Schulz, Birgitta Norberg, Tom Johnny Hansen

Comparative Biochemistry and Physiology A 235 p. 227-228

2017

Verification of isogenic nature of clonal lines in the altantic salmon (Salmo Salar) through ddRADseq

Münevver Oral, John B. Taggart, Brendan J. McAndrew, David J Penman, Per Gunnar Fjelldal, Tom Johnny Hansen

Aquaculture 472 p. 116-116

2013

Characterization of serum IgM in teleost fish, with emphasis on salmonids

Ivar Hordvik, Atif Kamil, Sumaira Bilal, Arnt Johan Raae, Per Gunnar Fjelldal, Erling Olaf Koppang

Fish and Shellfish Immunology 34 p. 1656-1656

Scientific lectures

2024

Uses of biotechnology to control reproduction in Atlantic salmon

Lene Kleppe, Anna Sofie Troedsson Wargelius, Diego Crespo, Erik Nordtorp Kjærner-Semb, Kai Ove Skaftnesmo, Eva Andersson, Per Gunnar Fjelldal, Tom Johnny Hansen, Rolf Brudvik Edvardsen, Anders Thorsen, Rüdiger W. Schulz, Anne Torsvik, Grethe Beate Thorsheim, Anne Hege Straume, Petra Vogelsang, Ivar Helge Matre, Ann-Kathrin Jakobsen Kroken, Lise Dyrhovden, Audun Østby Pedersen, Simon Flavell, Florian Sambraus, Arnor Gullanger, Tone Knappskog

2024

Moving sterile Crispr salmon from the tank to sea cages - regulatory barriers and social impacts

Anna Sofie Troedsson Wargelius, Erik Nordtorp Kjærner-Semb, Anne Hege Straume, Per Gunnar Fjelldal, Jonatan Nilsson, Hilal Guralp, Kai Ove Skaftnesmo, Dorothy Jane Dankel, Eva Andersson, Lene Kleppe, Rolf Brudvik Edvardsen

2022

Performance of Salmo salar smolt in sulfate reduced nanofiltered water

Pablo Balseiro Vigo, Erlend Nordvoll, Sara Calabrese, Cindy Pinto Pedrosa, Paula Andrea Rojas-Tirado, Enrique Pino Martinez, Mark Darryn Powell, Per Gunnar Fjelldal, Sigurd Olav Handeland, Åse Åtland

2022

Mortality thresholds for salmon lice infections in Atlantic salmon

Sussie Dalvin, Per Gunnar Fjelldal, Malthe Hvas, Ørjan Karlsen, Samantha Bui

2022

VGLL3A ALLELES AFFECT THE BRAIN-PITUITARY-GONAD AXIS IN ATLANTIC SALMON (SALMO SALAR) VIA REGULATION OF FSHB

Diego Crespo, Per Gunnar Fjelldal, Thomas Fraser, Rolf Brudvik Edvardsen, Anna Sofie Troedsson Wargelius

2022

Salmon lice in wild and cultured salmonids

Sussie Dalvin, Malthe Hvas, Per Gunnar Fjelldal, Ørjan Karlsen, Samantha Bui

2022

PERFORMANCE OF SALMO SALAR SMOLT IN SULFATE REDUCED NANOFILTERED WATER

2022

Consequence of enniatin B and beauvericin on salmon intestinal health

Kai Kristoffer Lie, Sofie Karin Söderström, Åsne Omdal, Øystein Sæle, Per Gunnar Fjelldal, Marc Berntssen

2018

Adaptive immune responses of Atlantic salmon (Salmo salar L.) to stimulation by Salmonid alphavirus subtype 3 infection or vaccination

Noelia Nuñez-Ortiz, Lindsey Moore, Jiraporn Jarungsriapisit, Stig Mæhle, Geir Lasse Taranger, Tom Ole Nilsen, Per Gunnar Fjelldal, Sigurd Olav Stefansson, Hugh Craig Morton, Tomás Korytár, Bernd Köllner, Samuel A. M. Martin, Sonal Patel

2018

Susceptibility to salmonid alphavirus (SAV) of different salmon breed lines.

Noelia Nuñez-Ortiz, Rasmus Skern-Mauritzen, Stig Mæhle, Lindsey Moore, Tom Johnny Hansen, Per Gunnar Fjelldal, Tomasz Furmanek, Rolf Edvardsen, Samuel A. M. Martin, Sonal Patel

2018

Hvordan fungerer laksens pubertetsgen?

2017

A comparative study of diploid and triploid Atlantic salmon post-smolts upon SAV-3 bath challenge and their immune transcriptomatic responses

Noelia Nuñez-Ortiz, Lindsey Moore, Tomasz Furmanek, Rolf Edvardsen, Samuel A. M. Martin, Tom Ole Nilsen, Jiraporn Jarungsriapisit, Per Gunnar Fjelldal, Sigurd Olav Stefansson, Geir Lasse Taranger, Sonal Patel

2017

Infection of Diploid and Triploid Atlantic Salmon with Salmonid Alpha Virus Subtype 3 (SAV3)

Lindsey Moore, Tom Ole Nilsen, Jiraporn Jarungsriapisit, Per Gunnar Fjelldal, Sigurd Olav Stefansson, Geir Lasse Taranger, Sonal Patel

2016

Adaptive plasticity in Atlantic salmon- genetic predisposition of time at maturity and environmental triggers

Rolf Edvardsen, Erik Nordtorp Kjærner-Semb, Fernando Ayllon, Tomasz Furmanek, Tom Johnny Hansen, Per Gunnar Fjelldal, Carl Johan Rubin, Lene Kleppe, Kai Ove Skaftnesmo, Elin Sørhus, Faezeh Mohammadi, Geir Dahle, Vidar Wennevik, Monica Favnebøe Solberg, Kevin Glover, Birgitta Norberg, Geir Lasse Taranger, Eva Andersson, Rüdiger W. Schulz, Anna Wargelius

2016

Osmoregulatory changes in sexually maturing Atlantic salmon post-smolt and adults

Tom Ole Nilsen, H. Sundh, Eva Andersson, Sigurd Olav Stefansson, Stephen D. McCormick, Geir Lasse Taranger, Rüdiger W. Schulz, Per Gunnar Fjelldal, Lars O.E. Ebbesson, Sigurd O Handeland, K. Sundell

2016

Androgens up-regulate freshwater ion transporters in seawater acclimated Atlantic salmon (Salmo salar)

Tom Ole Nilsen, Eva Andersson, Stephen D. McCormick, Sigurd Olav Stefansson, Michelle C. Melo, Geir Lasse Taranger, Per Gunnar Fjelldal, Lars O.E. Ebbesson, Birgitta Norberg, H. Sundh, K. Sundell, Sigurd O Handeland, Rüdiger Schultz

2016

Atlantisk laks er mer utsatt ved 2 uker enn ved 9 uker etter sjøvannutsett til SAV3 infeksjon

Jiraporn Jarungsriapisit, Lindsey Moore, Ingrid Uglenes Fiksdal, Ann Cathrine B. Einen, Per Gunnar Fjelldal, Tom Ole Nilsen, Sigurd Olav Stefansson, Geir Lasse Taranger, Øystein Evensen, Hugh Craig Morton, Sonal Patel

2015

Vanntemperatur og histidin i fôret påvirker utviklingen av katarakt hos diploid og triploid laksesmolt i ferskvann og sjøvann.

Florian Sambraus, Per Gunnar Fjelldal, Tom Hansen, Ernst Morten Hevrøy, Tom Ole Nilsen, Sofie C. Remø

2015

Atlantic salmon, salmo salar I., post-smolts are more susceptible to salmonid alphavirus infection during the initial phase after seawater transfer.

Jiraporn Jarungsriapisit, Lindsey Moore, Tom Ole Nilsen, Sigurd Olav Stefansson, Per Gunnar Fjelldal, Hugh Craig Morton, Øystein Evensen, Sonal Patel

2015

Physiological and immunological parameters affecting salmonid alphavirus infection in Atlantic salmon at post-smolt stages

Jiraporn Jarungsriapisit, Lindsey Moore, Miriam Furne, Per Gunnar Fjelldal, Tom Ole Nilsen, Sigurd Olav Stefansson, Geir Lasse Taranger, Øystein Evensen, Hugh Craig Morton, Sonal Patel

2015

Atlantic salmon, Salmon salar1, post-smolts are more susceptible to salmon alphavirus infection during the initial phase after sea water transfer.

Jiraporn Jarungsriapisit, Lindsey Moore, Geir Lasse Taranger, Tom Ole Nilsen, Sigurd Olav Stefansson, Per Gunnar Fjelldal, Hugh Craig Morton, Sonal Patel

2014

The speed of pubertal development in Atlantic salmon (Salmo salar) post-smolts is modulated by salinity and photoperiod.

Michelle Melo, Eva Andersson, Per Gunnar Fjelldal, Jan Bogerd, Luiz R. Franca, Geir Lasse Taranger, RW Schulz

2014

Tidlig kjønnsmodning påvirker laksens evne til å regulere vann- og salt balansen i sjø - et velferdsproblem?

Tom Ole Nilsen, Eva Andersson, Henrik Sundh, Kristina Sundell, Geir Lasse Taranger, RW Schulz, Birgitta Norberg, Per Gunnar Fjelldal, Lars O.E. Ebbesson, Sigurd Olav Stefansson

2014

Saltholdighet og fotoperiode påvirker postsmoltmodning og genuttrykk hos laksehanner.

Eva Andersson, Michelle Melo, Per Gunnar Fjelldal, Tom Ole Nilsen, Sigurd Olav Stefansson, Jan Bogerd, RW Schulz, Geir Lasse Taranger

2014

Svakt lys holder laksen dypt, sterkt lys gir best vekst.

Frode Oppedal, Tom Johnny Hansen, Per Gunnar Fjelldal, Ole Folkedal, Morten Malm, Harald Sveier, Thomas Torgersen, Lars Helge Stien

2014

Use of artificial light (LL) to prevent sexual maturation and increase growth in salmon sea cages.

Frode Oppedal, Per Gunnar Fjelldal, Tom Johnny Hansen, Thomas Torgersen, Ole Folkedal

2014

Use of artificial light (LL) to prevent sexual maturation and increase growth in salmon sea cages.

Frode Oppedal, Per Gunnar Fjelldal, Tom Johnny Hansen, Thomas Torgersen, Ole Folkedal

2014

Barotrauma and recovery of Atlantic cod (Gadus morhua) after rapid decompression: combining field observations and X-ray technology

Keno Ferter, Simon Weltersbach, Odd Børre Humborstad, Per Gunnar Fjelldal, Florian Sambraus, Harry Vincent Strehlow, Jon Helge Vølstad

2013

GLOBAL AND LOCAL METHYLATION PATTERN IN TRIPLOID AND DIPLOID AND TRIPLOID ATLANTIC SALMON

Anna Wargelius, Tomasz Furmanek, Rolf Edvardsen, Elin Sørhus, Per Gunnar Fjelldal, Tom Johnny Hansen

2012

Attempts to induce sterility in Atlantic salmon by morfolino and zink finger techniques

Anna Wargelius, Rolf Edvardsen, Trine Haugen, Ståle Ellingsen, Eva Andersson, Ketil Malde, Ørjan Karlsen, Per Gunnar Fjelldal, Geir Lasse Taranger, Øyvind Drivenes

2012

Knockdown of salmon dead-end affect gonad morphology in 10 months old Atlantic salmon (Salmo Salar L.)

Anna Wargelius, Øyvind Drivenes, Trine Haugen, Per Gunnar Fjelldal, Eva Andersson, Hans-Øyvind Svensvik, Rolf Edvardsen, Geir Lasse Taranger

2010

Continuous light induces bone resorption and affects vertebral morphology in Atlantic salmon (Salmo salar L.) fed a phosphorous deficient diet

Robin Ørnsrud, Erik-Jan Lock, Tom Johnny Hansen, Rune Waagbø, Anna Wargelius, Laura Gil Martens, Adel El-Mowafi, Per Gunnar Fjelldal

2009

Dietary Fatty Acids and Inflammation in the vertebral column of Atlantic salmon (Salmo salar) smolts: A possible link to spinal deformities

Laura Gil Martens, Erik-Jan Lock, Per Gunnar Fjelldal, Anna Wargelius, Pedro Araujo, Bente Elisabeth Torstensen, Paul Eckhard Witten, Tom Johnny Hansen, Rune Waagbø, Robin Ørnsrud

2009

Deformations of the spinal column in Atlantic salmon

Per Gunnar Fjelldal, Robin Ørnsrud, Olav Breck, Anna Wargelius, Arne Berg, Kevin A. Glover, Ane Grini, Roar Sandvik, Rune Waagbø, Tom Johnny Hansen

2008

Inflammation as a risk factor for spinal deformities in farmed Atlantic salmon (Salmo salar) 0+ smolts

Laura Gil Martens, Erik Jan Robert Lock, Robin Ørnsrud, Per Gunnar Fjelldal, Anna Sofie Troedsson Wargelius, Hernandez Pedro W Araujo, Bente Elisabeth Torstensen, Paul Eckhard Witten, Tom Johnny Hansen, Rune Waagbø

2008

Establishing an upper level of vitamin A in Atlantic salmon (Salmo salar)

Robin Ørnsrud, Erik-Jan Lock, Per Gunnar Fjelldal, Rune Waagbø

2006

Growth and tissue mineralization of Atlantic salmon (Salmo salar) smolt fed soluble phosphorus (P) salts, technologically treated fish bone meal and phytase in the diet - effect of available P on vertebra morphology and bone strength

Sissel Albrektsen, Per Gunnar Fjelldal, Tom Johnny Hansen, Jogeir Toppe

2000

Three forms of GnRH in the brain and pituitary of the turbot, Scophthalmus maximus; immunological characterization and seasonal variation

Eva Andersson, Per Gunnar Fjelldal, Ulrike Klenke

Poster

2023

A comparative study of the physiological responses of acute and chronically stressed diploid and triploid Atlantic salmon (Salmo salar).

Angelico Madaro, Floriana Lai, Per Gunnar Fjelldal, Tom HANSEN, Virginie Gelebart, Ivar Rønnestad, R.E. Olsen, Lars Helge Stien

2022

Mortality thresholds for Atlantic salmon with salmon lice infections

Samantha Bui, Per Gunnar Fjelldal, Malthe Hvas, Ørjan Karlsen, Sussie Dalvin

2021

Long-term performance of gene edited, sterile Atlantic salmon - growth, smoltification, welfare indicators and fillet composition.

Lene Kleppe, Per Gunnar Fjelldal, Eva Andersson, Tom Johnny Hansen, Monica Sanden, Aina Bruvik, Kai Ove Skaftnesmo, Tomasz Furmanek, Erik Nordtorp Kjærner-Semb, Diego Crespo, Simon Flavell, Audun Ø. Pedersen, Petra Vogelsang, Anne Torsvik, Sara Olausson, Birgitta Norberg, Rüdiger W. Schulz, Jan Bogerd, Nina Santi, Rolf Brudvik Edvardsen, Anna Wargelius

2018

VGLL3 AND THE HIPPO PATHWAY ARE REGULATED IN SERTOLI CELLS UPON ENTRY AND DURING PUBERTY IN ATLANTIC SALMON TESTIS.

2014

Functional and mutagenic analyses of four water channel paralogues (Aqp0) in relation to cataractogenesis in diploid and triploid Atlantic salmon

Francois Chauvigné, Jon Anders Stavang, Geir Lasse Taranger, Per Gunnar Fjelldal, Tom Johnny Hansen, Rune Waagbø, Joan Cerdà, Roderick Nigel Finn

2013

The use of triploid salmon in Norwegian Aquaculture

Thomas WK Fraser, Tom Johnny Hansen, Ian Mayer, Kevin A. Glover, Jon Egil Skjæraasen, Vidar Wennevik, Robin Ørnsrud, Florian Sambraus, Per Gunnar Fjelldal

2013

Dietary phosphorus in fresh and seawater - impacts on rapid growing farmed Atlantic salmon

Florian Sambraus, O. Breck, Sissel Albrektsen, Paul Eckhard Witten, Ramon Fontanillas, Per Gunnar Fjelldal

2013

The use of triploid salmon in Norwegian Aquaculture

Thomas WK Fraser, Tom Johnny Hansen, Ian Mayer, Jon Egil Skjæraasen, Robin Ørnsrud, Florian Sambraus, Per Gunnar Fjelldal

2013

Radiological studies on vertebral deformities in triploid Atlantic salmon (Salmo salar)

Thomas WK Fraser, Tom Johnny Hansen, M. Fleming, Florian Sambraus, Ian Mayer, Jon Egil Skjæraasen, Anna Wargelius, Robin Ørnsrud, Erik-Jan Lock, Per Gunnar Fjelldal

2013

Does triploidy affect brain morphology and neurochemistry in Atlantic salmon, Salmo salar?

Thomas WK Fraser, Joel Glover, Marco A. Vindas, Øyvind Øverli, Jon Egil Skjæraasen, Tom Johnny Hansen, Per Gunnar Fjelldal, Ian Mayer

2013

Phosphatase activities in Atlantic salmon (Salmo salar) vertebral bone and scales: our findings from the past years

Erik-Jan Lock, Per Gunnar Fjelldal, Robin Ørnsrud, Sissel Albrektsen, Tom Johnny Hansen, Rune Waagbø

2008

Inflammation as a risk factor for spinal deformities in farmed Atlantic salmon underyearling smolts

Laura Gil Martens, Erik-Jan Lock, Robin Ørnsrud, Per Gunnar Fjelldal, Anna Wargelius, Bente Elisabeth Torstensen, Paul Eckhard Witten, Tom Johnny Hansen, Rune Waagbø

2008

Dietary menadione nicotinamide bisulphite (vitamin K) does not affect growth or bone health in first feeding Atlantic salmon (Salmo salar)

Christel Krossøy, Rune Waagbø, Per Gunnar Fjelldal, Anna Wargelius, Erik-Jan Lock, Ingvild Eide Graff, Robin Ørnsrud

2007

Investigations on first feeding fry of Atlantic salmon (Salmo salar L.) fed diets with different levels of menadione nicotinamide bisulphite (MNB)

Christel Krossøy, Per Gunnar Fjelldal, Rune Waagbø, Anna Wargelius, Robin Ørnsrud

Reports and dissertations

2024

Nefrokalsinose og hemorragisk smoltsyndrom: Årsakssammenhenger og muligheter for forebygging. Sluttrapport FHF prosjekt 901588, Veterinærinstituttets rapportserie 6/2024, 78 pp.

Arve Nilsen, Sveinung Fivelstad, Camilla Diesen Hosfeld, Anne Berit Olsen, Kai-Inge Lie, Marianne Kraugerud, Per Gunnar Fjelldal, Ingunn Sommerset, Ian Mayer, Sofie Charlotte Remø

2023

Production, fasting and delousing of triploid and diploid salmon in Northern Norway - Report for the 2020-generation

Lars Helge Stien, Cameron Thompson, Per Gunnar Fjelldal, Frode Oppedal, Tore S Kristiansen, Per Anton Sæther, Per Magne Bølgen, Lisbeth Martinsen

2022

Effekt på dyrevelferd av gjentatte termiske behandlinger med ulik Δt, ulik utgangstemperatur og ulik behandlingstemperatur

Lars Helge Stien, Samantha Bui, Jonatan Nilsson, Angelico Madaro, Per Gunnar Fjelldal, Merete Bjørgan Schrøder, Birger Venås, Malin Johansen, Tore Seternes, Caroline Piercey Åkesson, Helene Wisløff, Monica Fengsrud Brinchmann, Deepti Manjari Patel, Martin Haugmo Iversen

2021

Andre samlerapport: velferd for triploid laks i Nord-Norge - Sluttrapport, utsett 2018

Lars Helge Stien, Florian Sambraus, Per Anton Sæther, Mattias Bendiksen Lind, Tore S Kristiansen, Jonatan Nilsson, Per Gunnar Fjelldal

2021

Tredje samlerapport: Velferd for triploid laks i Nord-Norge - Sluttrapport, utsett 2019

Lars Helge Stien, Florian Sambraus, Tore S Kristiansen, Per Gunnar Fjelldal, Per Anton Sæther, Lisbeth Martinsen

2019

Første samlerapport: Velferd for triploid laks i Nord-Norge

Lars Helge Stien, Per Anton Sæther, Tore S Kristiansen, Per Gunnar Fjelldal, Florian Sambraus

2017

DNA damage and health effects in juvenile haddock exposed to sediment or produced water associated PAHs

Sonnich Meier, Ørjan Karlsen, Jérémie Le Goff, Lisbet Sørensen, Rolf Edvardsen, Sissel Jentoft, Karianne Skogland, Per Gunnar Fjelldal, Daniela Maria Pampanin, Evgenia Dunaevskaya, Marta Romano, Mark Myers, Bjørn Einar Grøsvik

2016

Solving bottlenecks in triploid Atlantic salmon production: Temperature, hypoxia and die ary effects on performance, cataracts and metabolism

Florian Sambraus, Per Gunnar Fjelldal, Rune Waagbø

2014

Beinhelse og fosforbehov i laks: Sluttrapport

Per Gunnar Fjelldal, Sissel Albrektsen, Eckhard Witten, Ramon Fontanillas, Leo Nankervis, Tårn Helgøy Thomsen, Olav Breck

2000

Salmon gonadotropin-releasing hormone (sGnRH) in the brain and pituitary of turbot, Scophthalmus maximus: Immunological characterisation and seasonal variation

Fjelldal, Per Gunnar

Net reports

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