Thomas Fraser

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

Fraser TWK, A Tjølsen, A Madaro, TJ Hansen, PG Fjelldal

Aquaculture 593

2024

The behavioral and neurobiological response to sound stress in salmon

Oppedal F, LT Barrett, TWK Fraser, T Vågseth, G Zhang, OG Andersen, L Jacson, M-A Dieng, MA Vindas

Brain, Behavior and Evolution

2024

Behavioral and neurophysiological effects of buspirone in healthy and depression-like state juvenile salmon

Shapouri S, A Sharifi, O Folkedal, TWK Fraser, MA Vindas

Frontiers in Behavioral Neuroscience 18 p. 1285413

2024

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

Sankar M, H Kryvi, TWK Fraser, AJP Philip, S Remø, TJ Hansen, PE Witten, PG Fjelldal

Journal of Fish Biology

2023

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

Fraser TWK, TJ Hansen, PG Fjelldal

Fishes 8 p. 275

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.)

Myklatun LE, TWK Fraser, PG Fjelldal, AØ Pedersen, TJ Hansen

Aquaculture 569 p. 739346

2023

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

Fraser TWK, TJ Hansen, B Norberg, TO Nilsen, RW Schulz, PG Fjelldal

Aquaculture 562 p. 738772

2022

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

Fjelldal PG, TWK Fraser, TJ Hansen, Ø Karlsen, S Bui

ICES Journal of Marine Science 79 p. 1530-1538

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

Fraser TWK, TJ Hansen, SC Remø, RErik Olsen, PG Fjelldal

Aquaculture 552 p. 737975

2022

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

Fraser TWK, TJ Hansen, SC Remø, PG Fjelldal

Aquaculture 547 p. 737465

2022

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

de Fonseka R, PG Fjelldal, F Sambraus, TO Nilsen, SC Remø, LH Stien, HC Reinardy, A Madaro, TJ Hansen, TWK Fraser

Aquaculture 546 p. 737350

2021

Lamotrigine effects on immune gene expression in larval zebrafish

Mochol M, P Whatmore, E Taubøll, CJ Landmark, E Ropstad, S Svalheim, TWK Fraser

Epilepsy Research 178 p. 106823

2021

Developmental exposure to a POPs mixture or PFOS increased body weight and reduced swimming ability but had no effect on reproduction or behavior in zebrafish adults

Christou M, E Ropstad, S Brown, JH Kamstra, TWK Fraser

Aquatic Toxicology 237 p. 105882

2021

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

Fraser TWK, H Lerøy, TJ Hansen, JE Skjæraasen, V Tronci, CP Pedrosa, PG Fjelldal, Tom Ole Nilsen

Aquaculture 540 p. 736698

2021

Vertebral deformities in interspecific diploid and triploid salmonid hybrids

Fraser TWK, TJ Hansen, F Sambraus, PG Fjelldal

Journal of Fish Biology 98 p. 1059-1070

2021

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

Fjelldal PG, A Madaro, M Hvas, LH Stien, F Oppedal, TWK Fraser

Journal of fish biology 98 p. 1049-1058

2020

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

Fjelldal PG, TJ Hansen, A Wargelius, F Ayllon, KA Glover, RW Schulz, TWK Fraser

BMC genetics 21 p. 1-13

2020

DMSO effects larval zebrafish (Danio rerio) behavior, with additive and interaction effects when combined with positive controls

Christou M, A Kavaliauskis, E Ropstad, TWK Fraser

Science of the Total Environment 709 p. 134490

2020

Is it advantageous for Atlantic salmon to be triploid at lower temperatures

Riseth EN, TWK Fraser, F Sambraus, LH Stien, M Hvas

Journal of Thermal Biology 89 p. 102548

2020

Triploid Atlantic salmon Salmo salar have a higher dietary phosphorus requirement for bone mineralisation during the very early stages of development

Sambraus F, TJ Hansen, BS Daae, A Thorsen, R Sandvik, LH Stein, TWK Fraser, PG Fjelldal

Journal of Fish Biology 97 p. 137-147

2020

Calcium signaling as a possible mechanism behind increased locomotor response in zebrafish larvae exposed to a human relevant persistent organic pollutant mixture or PFOS

Christou M, TWK Fraser, V Berg, E Ropstad, JH Kamstra

Environmental Research 187 p. 109702

2020

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

Fraser TWK, PG Fjelldal, I Sommerset, T Støfteland, O Høstmark, MD Powell, V Heen, TJ Hansen

Aquaculture Environment Interactions 12 p. 327-338

2020

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

Hansen TJ, C Real, D Penman, KA Glover, TWK Fraser, T Vågseth, A Thorsen, AGE Sørvik, PG Fjelldal

BMC Genetics 21 p. 71

2019

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

Fraser TWK, E Witten, S Albrektsen, O Breck, R Fontanillas, L Nankervis, TH Thomsen, W Koppe, F Sambraus, PG Fjelldal

Aquaculture 511 p. 734246

2019

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

Fraser TWK, PG Fjelldal, R Schulz, B Norberg, T Hansen

Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 185 p. 125-131

2018

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

Fjelldal PG, T van der Meeren, TWK Fraser, F Sambraus, L Jawad, TJ Hansen

Journal of Fish Diseases 41 p. 1871-1875

2018

Sub-lethal UV radiation during early life stages alters the behaviour, heart rate and oxidative stress parameters in zebrafish (Danio rerio).

Hurem S, TWK Fraser, T Gomes, I Mayer, T Christensen

Ecotoxicology and Environmental Safety 166 p. 359-365

2018

Mycotoxins induce developmental toxicity and behavioural aberrations in zebrafish larvae

Khezri A, JGH Jusdado, E Ropstad, TWK Fraser

Environmental Pollution 242 p. 500-506

2018

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

Sambraus F, M Remen, RE Olsen, TJ Hansen, R Waagbø, T Torgersen, EJ Lock, A Imsland, TWK Fraser, PG Fjelldal

Aquaculture Environment Interactions 10 p. 157-172

2018

A human based mixture of persistent organic pollutants (POPs) alters the stress response in female mice and their offspring

Hudecova AM, KEA Hansen, S Mandel, HF Berntsen, A Khezri, T Bale, TWK Fraser, KE Zimmer, E Ropstad

Chemosphere 197 p. 585-593

2017

Endocrine disruptors effect larval zebrafish behavior: Testing potential mechanisms and comparisons of behavioral sensitivity to alternative biomarkers

Fraser TWK, A Khezri, AM Lewandowska-Sabat, T Henry, E Ropstad

Aquatic Toxicology 193 p. 128-135

2017

Uncontrollable chronic stress reduces growth disparities in farmed Atlantic salmon

Vindas MA, A Madaro, TWK Fraser, E Höglund, RE Olsen, TS Kristiansen, Ø Øverli

Physiology & Behavior 179 p. 246-252

2017

Toxicant induced behavioural aberrations in larval zebrafish are dependent on minor methodological alterations

Fraser TWK, A Khezri, JGH Jusdado, AM Lewandowska-Sabat, T Henry, E Ropstad

Toxicology Letters 276 p. 62-68

2017

A mixture of persistant organic pollutants and PFOS induce similar behavioural responses, but have different gene expression profiles in zebrafish larvae

Khezri A, TWF Fraser, R Nourizadeh-Lilabadi, J Kamstra, V Berg, K Zimmer, E Ropstad

International Journal of Molecular Toxicology 18 p. 291

2016

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

Fjelldal PG, TJ Hansen, EJ Lock, A Wargelius, TWK Fraser, F Sambraus, A El-Mowafi, S Albrektsen, R Waagbø, R Ørnsrud

Aquaculture Nutrition 22 p. 72-90

2016

Coping with a changing environment: the effects of early-life stress

Vindas, MA, A Madaro, TWK Fraser, E Höglund, RE Olsen, Ø Øverli, TS Kristiansen

Royal Society Open Science 3 p. 160382

2015

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

Fraser TWK, T Hansen, MS Fleming, PG Fjelldal

Journal of Fish Diseases 38 p. 75-89

2015

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

Fraser TWK, I Mayer, T Hansen, TT Poppe, JE Skjæraasen, EO Koppang, PG Fjelldal

Journal of Fish Diseases 38 p. 151-160

2015

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

Fraser TWK, M Vindas, PG Fjelldal, S Winberg, P Thörnqvist, Ø Øverli, JE Skjæraasen, T Hansen, I Mayer

Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology 185 p. 125-131

2015

Fast water currents reduce production performance of post-smolt Atlantic salmon Salmo salar

Solstorm F, D Solstorm, F Oppedal, A Fernö, TWK Fraser, RE Olsen

Aquaculture Environment Interactions 7 p. 125-134

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

Fraser TWK, MS Fleming, TT Poppe, T Hansen, PG 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)

Larsen HAS, L Austbø, A Nødvedt, TWK Fraser, E Rimstad, PG Fjelldal, T Hansen, EO Koppang

Journal of Fish Diseases 37 p. 327-340

2014

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

Fraser TWK, I Mayer, JE Skjæraasen, T Hansen, PG Fjelldal

Aquaculture International 22 p. 1347-1359

2014

Vertebra deformities in wild Atlantic salmon caught in river Figgjo, southwest Norway

10. Sambraus F, KA Glover, T Hansen, TWK Fraser, MF Solberg, PG Fjelldal

Journal of Applied Ichthyology 30 p. 777-782

2014

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

Fraser TWK, PG Fjelldal, TJ Hansen, F Oppedal, RE Olsen, T Vågseth, M Remen

Diseases of Aquatic Organisms 111 p. 87-92

2014

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

Fraser TWK, T Hansen, I Mayer, JE Skjæraasen, KA Glover, F Sambraus, PG Fjelldal

Aquaculture 433 p. 481-490

2013

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

Fraser TWK, T Hansen, JE Skjæraasen, I Mayer, F Sambraus, PG Fjelldal

Aquaculture 416-417 p. 255-264

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

Fraser TWK, A Rønneseth, GT Haugland, PG Fjelldal, I Mayer, HI Wergeland

Fish and Shellfish Immunology 33 p. 60-66

2012

Welfare considerations of triploid fish

Fraser TWK, PG Fjelldal, T Hansen, I Mayer

Reviews in Fisheries Science 20 p. 192-211

2012

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

Fraser TWK, PG Fjelldal, JE Skjæraasen, T Hansen, I Mayer

Journal of Fish Biology 81 p. 2199-2212

2011

Dietary toxicity of single-walled carbon nanotubes and fullerenes (C60) in rainbow trout (Oncorhynchus mykiss)

Fraser TWK, HC Reinardy, BJ Shaw, TB Henry, RD Handy

Nanotoxicology 5 p. 98-108

2011

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

Cantas L, TWK Fraser, PG Fjelldal, I Mayer, H Sørum

BMC Veterinary Research 7 p. 71

2009

Modelling demersal fishing effort based on landings and days absence from port, to generate indicators of “activity”

Greenstreet SPR, GJ Holland, TWK Fraser, VJ Allen

ICES Journal of Marine Science 66 p. 886-901

2009

Nutritional requirements of cobia, Rachycentron canadum (Linnaeus) – a review

Fraser TWK, SJ Davies

Aquaculture Research 40 p. 1219-1234

Thomas Fraser

Publications

Academic articles

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

The behavioral and neurobiological response to sound stress in salmon

Behavioral and neurophysiological effects of buspirone in healthy and depression-like state juvenile salmon

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

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

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.)

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

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

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

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

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

Lamotrigine effects on immune gene expression in larval zebrafish

Developmental exposure to a POPs mixture or PFOS increased body weight and reduced swimming ability but had no effect on reproduction or behavior in zebrafish adults

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

Vertebral deformities in interspecific diploid and triploid salmonid hybrids

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

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

DMSO effects larval zebrafish (Danio rerio) behavior, with additive and interaction effects when combined with positive controls

Is it advantageous for Atlantic salmon to be triploid at lower temperatures

Triploid Atlantic salmon Salmo salar have a higher dietary phosphorus requirement for bone mineralisation during the very early stages of development

Calcium signaling as a possible mechanism behind increased locomotor response in zebrafish larvae exposed to a human relevant persistent organic pollutant mixture or PFOS

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

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

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

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

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

Sub-lethal UV radiation during early life stages alters the behaviour, heart rate and oxidative stress parameters in zebrafish (Danio rerio).

Mycotoxins induce developmental toxicity and behavioural aberrations in zebrafish larvae

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

A human based mixture of persistent organic pollutants (POPs) alters the stress response in female mice and their offspring

Endocrine disruptors effect larval zebrafish behavior: Testing potential mechanisms and comparisons of behavioral sensitivity to alternative biomarkers

Uncontrollable chronic stress reduces growth disparities in farmed Atlantic salmon

Toxicant induced behavioural aberrations in larval zebrafish are dependent on minor methodological alterations

A mixture of persistant organic pollutants and PFOS induce similar behavioural responses, but have different gene expression profiles in zebrafish larvae

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

Coping with a changing environment: the effects of early-life stress

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

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

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

Fast water currents reduce production performance of post-smolt Atlantic salmon Salmo salar

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

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

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

Vertebra deformities in wild Atlantic salmon caught in river Figgjo, southwest Norway

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

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

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

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

Welfare considerations of triploid fish

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

Dietary toxicity of single-walled carbon nanotubes and fullerenes (C60) in rainbow trout (Oncorhynchus mykiss)

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

Modelling demersal fishing effort based on landings and days absence from port, to generate indicators of “activity”

Nutritional requirements of cobia, Rachycentron canadum (Linnaeus) – a review

Reports and dissertations

Triploid Atlantic salmon in aquaculture-Consequences for fish health and welfare under farming conditions

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