Hjem
Sigurd Stefanssons bilde

Sigurd Stefansson

Professor
  • E-postSigurd.Stefansson@uib.no
  • Telefon+47 55 58 44 70+47 930 84 646
  • Besøksadresse
    Thormøhlens gate 53 A/B
  • Postadresse
    Postboks 7803
    5020 Bergen

Professor Sigurd O. Stefansson (Januar, 2015 ISI statistic 146, H-index 38) har lang forskningserfaring innen vekst og utvikling hos fisk, reproduksjon og tilpasning til miljøet, både i laksefisk og marine arter, med bruk av en rekke metoder. Sentralt i Stefanssons forskning er laksens smoltifiseringsprosess, og forskningen omfatter både grunnleggende studier og samarbeid med havbruksnæringen. Forskningstemaene omfatter miljømessig, genetisk og hormonelle kontrollen av smoltifiseringen, og grunnleggende mekanismer for tilpasning til sjøvann.

BIO 104 Komparativ fysiologi

BIO 203 Innføring i havbruk

BIO 291 Fiskebiologi II - Fiskefysiologi

BIO 304 Spesialisering i havbruksbiologi

BIO 375 Fiskesjukdommar - Vannkvalitet

Cand. scient. og Master studenter:

41 studenter som har tatt graden

Dr. scient og PhD studenter:

10 studenter som har tatt graden, 2 studenter under veiledning

Post-doc forskere:

3 ferdige

Vitenskapelig artikkel
  • Vis forfatter(e) 2020. Performance and welfare of Atlantic salmon, Salmo salar L. post-smolts in recirculating aquaculture systems: Importance of salinity and water velocity. Journal of the World Aquaculture Society. 373-392.
  • Vis forfatter(e) 2019. The use of photoperiods to provide year round spawning in lumpfish Cyclopterus lumpus. Comparative Biochemistry and Physiology A. 62-70.
  • Vis forfatter(e) 2019. Improving sea lice grazing of lumpfish (Cyclopterus lumpus L.) by feeding live feeds prior to transfer to Atlantic salmon (Salmo salar L.) net-pens. Aquaculture.
  • Vis forfatter(e) 2019. Flesh quality of Atlantic salmon smolts reared at different temperatures and photoperiods. Aquaculture Research. 1795-1801.
  • Vis forfatter(e) 2018. The effect of continuous light and compressed photoperiods on growth and maturation in lumpfish Cyclopterus lumpus. Aquaculture. 166-172.
  • Vis forfatter(e) 2018. High fish density delays wound healing in Atlantic salmon (Salmo salar). Scientific Reports. 13 sider.
  • Vis forfatter(e) 2018. Atlantic salmon post-smolts adapted for a longer time to seawater develop an effective humoral and cellular immune response against Salmonid alphavirus. Fish and Shellfish Immunology. 579-590.
  • Vis forfatter(e) 2018. Atlantic salmon adapted to seawater for 9 weeks develop a robust immune response to salmonid alphavirus upon bath challenge. Fish and Shellfish Immunology. 573-583.
  • Vis forfatter(e) 2017. Triploid atlantic salmon (Salmo salar L.) postsmolts accumulate prevalence more slowly than diploid salmon following bath challenge with salmonid alphavirus subtype 3. PLOS ONE. 1-12.
  • Vis forfatter(e) 2017. The effect of continuous light at low temperatures on growth in Atlantic salmon reared in commercial size sea pens. Aquaculture. 645-651.
  • Vis forfatter(e) 2017. Stocking density limits for post-smolt Atlantic salmon (Salmo salar L.) emphasis on production performance and welfare. Aquaculture. 363-370.
  • Vis forfatter(e) 2017. Immune gene profiles in Atlantic salmon (salmo salar L.) post-smolts infected with SAV3 by bath-challenge show a delayed response and lower levels of gene transcription compared to injected fish. Fish and Shellfish Immunology. 320-331.
  • Vis forfatter(e) 2016. The effect of low temperatures and photoperiods on growth and vertebra morphometry in Atlantic salmon. Aquaculture International. 1421-1434.
  • Vis forfatter(e) 2016. Relationship between viral dose and outcome of infection in Atlantic salmon, Salmo salar L., post-smolts bath-challenged with salmonid alphavirus subtype 3. Veterinary research (VR). 1-13.
  • Vis forfatter(e) 2016. Impact of fish density and specific water flow on skin properties in Atlantic salmon (Salmo salar L.) post-smolts. Aquaculture. 629-637.
  • Vis forfatter(e) 2016. Identification of a novel leptin receptor duplicate in Atlantic salmon: Expression analyses in different life stages and in response to feeding status. General and Comparative Endocrinology. 108-119.
  • Vis forfatter(e) 2016. Growth and Smoltification of Three Norwegian Strains of Atlantic Salmon Salmo salar Reared under Different Thermal Regimes. Rivers Research and Applications: an international journal devoted to river research and management. 1800-1807.
  • Vis forfatter(e) 2016. Effects of temperature on the final stages of sexual maturation in Atlantic salmon (Salmo salar L.). Fish Physiology & Biochemistry. 895-907.
  • Vis forfatter(e) 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). Virology Journal. 14 sider.
  • Vis forfatter(e) 2015. Roles of leptin and ghrelin in adipogenesis and lipid metabolism of rainbow trout adipocytes in vitro. Comparative Biochemistry and Physiology A. 40-48.
  • Vis forfatter(e) 2014. Plasma growth hormone-binding protein levels in Atlantic salmon Salmo salar during smoltification and seawater transfer. Journal of Fish Biology. 1279-1296.
  • Vis forfatter(e) 2014. Photoperiod and temperature effects on growth and maturation of pre- and post-smolt Atlantic salmon. Aquaculture International. 1331-1345.
  • Vis forfatter(e) 2014. Osmoregulation in Atlantic salmon Salmo salar smolts transferred to seawater at different temperatures. Journal of Fish Biology. 1163-1176.
  • Vis forfatter(e) 2014. Osmoregulation and growth in offspring of wild Atlantic salmon at different temperatures. Environmental Biology of Fishes. 285-296.
  • Vis forfatter(e) 2014. Development of intestinal ion-transporting mechanisms during smoltification and seawater acclimation in Atlantic salmon Salmo salar. Journal of Fish Biology. 1227-1252.
  • Vis forfatter(e) 2013. Seawater tolerance and post-smolt migration of wild Atlantic salmon Salmo salar × brown trout S. trutta hybrid smolts. Journal of Fish Biology. 206-227.
  • Vis forfatter(e) 2013. Physiology during smoltification in Atlantic salmon: effect of melatonin implants. Fish Physiology & Biochemistry. 1079-1088.
  • Vis forfatter(e) 2013. Molecular cloning and genomic characterization of novel Leptin-like genes in salmonids provide new insight into the evolution of the Leptin gene family. General and Comparative Endocrinology. 48-59.
  • Vis forfatter(e) 2013. Long-term effects of photoperiod, temperature and their interaction on growth, gill Na+, K+-ATPase activity, seawater tolerance and plasma growth-hormone levels in Atlantic salmon Salmo salar. Journal of Fish Biology. 1197-1209.
  • Vis forfatter(e) 2013. Atlantic salmon (Salmo salar L.) smolts require more than two weeks to recover from acidic water and aluminium exposure. Aquatic Toxicology. 33-44.
  • Vis forfatter(e) 2013. Aluminum exposure impacts brain plasticity and behavior in Atlantic salmon (Salmo salar). Journal of Experimental Biology. 3148-3155.
  • Vis forfatter(e) 2012. The role of growth hormone in growth, lipid homeostasis, energy utilization and partitioning in rainbow trout: Interactions with leptin, ghrelin and insulin-like growth factor I. General and Comparative Endocrinology. 153-162.
  • Vis forfatter(e) 2012. Salmon lice-induced mortality of Atlantic salmon postsmolts experiencing episodic acidification and recovery in freshwater. Aquaculture. 193-199.
  • Vis forfatter(e) 2012. Recovery of Atlantic salmon smolts following aluminum exposure defined by changes in blood physiology and seawater tolerance. Aquaculture. 232-240.
  • Vis forfatter(e) 2012. Larval rearing environment influences the physiological adaptation in juvenile Atlantic cod, Gadus morhua. Aquaculture International. 467-479.
  • Vis forfatter(e) 2012. Isolation and characterization of melanopsin photoreceptors of atlantic salmon (Salmo salar). Journal of Comparative Neurology. 3727-3744.
  • Vis forfatter(e) 2012. Growth, osmoregulation and endocrine changes in wild Atlantic salmon smolts and post-smolts during marine migration. Aquaculture. 127-136.
  • Vis forfatter(e) 2011. Leptin reduces Atlantic salmon growth through the central pro-opiomelanocortin pathway. Comparative Biochemistry and Physiology A. 79-86.
  • Vis forfatter(e) 2011. Involvement of Prop1 homeobox gene in the early development of fish pituitary gland. General and Comparative Endocrinology. 332-340.
  • Vis forfatter(e) 2011. Growth and osmoregulation in Atlantic salmon (Salmo salar ) smolts in response to different feeding frequencies and salinities. Aquaculture Research. 469-479.
  • Vis forfatter(e) 2011. Environmental endocrinology of salmon smoltification. General and Comparative Endocrinology. 290-298.
  • Vis forfatter(e) 2011. Effect of rearing temperatures on the growth and maturation of Arctic charr (Salvelinus alpinus) during juvenile and on-growing periods. Aquaculture Research. 221-229.
  • Vis forfatter(e) 2011. Corticotropin-Releasing Factor Neurogenesis during Midlife Development in Salmon: Genetic, Environmental and Thyroid Hormone Regulation. Journal of neuroendocrinology. 733-741.
  • Vis forfatter(e) 2011. A retrospective approach to fractionize variation in body mass of Atlantic cod Gadus morhua. Journal of Fish Biology. 251-264.
  • Vis forfatter(e) 2010. The influence of first-feeding diet on the Atlantic cod Gadus morhua phenotype: survival, development and long-term consequences for growth. Journal of Fish Biology. 1-19.
  • Vis forfatter(e) 2010. Physiological effects of normbaric environmental hyperoxia on Atlantic salmon (Salmo solar L.) presmolts. Aquaculture. 28-33.
  • Vis forfatter(e) 2010. Ontogenetic effects of diet during early development on growth performance, myosin mRNA expression and metabolic enzyme activity in Atlantic cod juveniles reared at different salinities. Comparative Biochemistry and Physiology A. 102-109.
  • Vis forfatter(e) 2010. Leptin and leptin receptor genes in Atlantic salmon: Cloning, phylogeny, tissue distribution and expression correlated to long-term feeding status. General and Comparative Endocrinology. 55-70.
  • Vis forfatter(e) 2010. Effects of acidic water and aluminum exposure on gill Na+, K+-ATPase alpha-subunit isoforms, enzyme activity, physiology and return rates in Atlantic salmon (Salmo salar L.). Aquatic Toxicology. 250-259.
  • Vis forfatter(e) 2009. Long-term effect of photoperiod manipulation on growth, maturation and flesh quality in Atlantic halibut. Aquaculture Research. 1260-1269.
  • Vis forfatter(e) 2009. Influence of sea temperature and initial marine feeding on survival of Atlantic salmon Salmo salar post-smolts from the Rivers Orkla and Hals, Norway. Journal of Fish Biology. 1532-1548.
  • Vis forfatter(e) 2009. Food-deprivation, compensatory growth and hydro-mineral balance in Atlantic salmon (Salmo salar) post-smolts in sea water. Aquaculture. 243-249.
  • Vis forfatter(e) 2009. Effects of fish density on growth and smoltification in intensive production of Atlantic salmon (Salmo salar L.). Aquaculture. 236-241.
  • Vis forfatter(e) 2009. Compensatory growth in Atlantic halibut: Effect of starvation and subsequent feeding on growth, maturation, feed utilization and flesh quality. Aquaculture. 304-310.
  • Vis forfatter(e) 2008. Nutritional status of Atlantic salmon (Salmo salar) broodstock. Maternal effects on early expression of leptin, IGF-I, IGF-IR, and GHR. Cybium. 62-63.
  • Vis forfatter(e) 2007. Impacts of elevated water carbon dioxide partial pressure at two temperatures on Atlantic salmon (Salmo salar L.) parr growth and haematology. Aquaculture. 241-249.
  • Vis forfatter(e) 2006. Short- and long-term differences in growth, feed conversion efficiency and deformities in juvenile Atlantic cod (Gadus morhua) startfed on rotifers or zooplankton. Aquaculture Research. 1015-1027.
  • Vis forfatter(e) 2006. Growth, feed conversion efficiency and growth heterogeneity in Atlantic halibut (Hippoglossus hippoglossus) reared at three different photoperiods. Aquaculture Research. 1099-1106.
  • Vis forfatter(e) 2006. Effects of dietary soybeanmeal and photoperiod cycle on osmoregulation following seawater exposure in Atlantic salmon smolts. Journal of Fish Biology. 1396-1426.
  • Vis forfatter(e) 2006. Does malpigmentation improve growth in juvenile turbot (Scophthalmus maximus Rafinesque) and halibut (Hippoglossus hippoglossus L.)? Aquaculture Research. 306-312.
  • Vis forfatter(e) 2006. Compensatory growth and fillet crude composition in juvenile Atlantic halibut: Effects of short term starvation periods and subsequent feeding. Aquaculture. 109-117.
  • Vis forfatter(e) 2005. The interrelation between temperature regimes and fish size in juvenile Atlantic cod (Gadus morhua): effects on growth and feed conversion efficiency. Fish Physiology & Biochemistry. 347-361.
  • Vis forfatter(e) 2005. Genotypic response to photoperiod treatment in Atlantic cod (Gadus morhua). Aquaculture. 525-532.
  • Vis forfatter(e) 2004. Variations in growth in haemoglobin genotypes of Atlantic cod. Fish Physiology & Biochemistry. 47-55.
  • Vis forfatter(e) 2004. Temperature influence on the development and loss of seawater tolerance in two fast-growing strains of Atlantic salmon. Aquaculture. 513-529.
  • Vis forfatter(e) 2004. Plasma levels of vitamin D-3 metabolites during parr-smolt transformation of Atlantic salmon Salmo salar L. Aquaculture. 617-622.
  • Vis forfatter(e) 2004. Photoperiod and temperature affects seasonal ovarian gene expression of p450 aromatase and gonadotropin receptors in Atlantic Salmon (Salmo salar L.) broodstock. Fish Physiology & Biochemistry. 411-411.
  • Vis forfatter(e) 2004. Lack of long-term sublethal effects of reduced freshwater pH alone on Atlantic salmon (Salmo salar) smolts subsequently transferred to seawater. Canadian Journal of Fisheries and Aquatic Sciences. 511-518.
  • Vis forfatter(e) 2004. Influence of exogenous thyroxine on plasma melatonin in juvenile Atlantic salmon (Salmo salar). Comparative Biochemistry and Physiology - Part B: Biochemistry & Molecular Biology. 43-47.
  • Vis forfatter(e) 2004. Effects of photoperiod, temperature and GnRHa treatment on the reproductive physiology of Atlantic salmon (Salmo salar L.) broodstock. Fish Physiology & Biochemistry. 403-406.
  • Vis forfatter(e) 2004. Effects of 3-thia fatty acids on feed intake,growth, tissue fatty acid composition, beta-oxidation and Na,K-ATPase activity in Atlantic salmon. ?. 657-668.
  • Vis forfatter(e) 2003. The influence of temperature and ration on growth, feed conversion, body composition and nutrient retention of juvenile turbot (Scophthalmus maximus). Aquaculture. 547-558.
  • Vis forfatter(e) 2003. Smolting in anadromous and landlocked strains of Atlantic salmon (Salmo salar). Aquaculture. 71-82.
  • Vis forfatter(e) 2003. Neural circuits and their structural and chemical reorganization in the light-brain-pituitary axis during parr-smolt transformation in salmon. Aquaculture. 59-70.
  • Vis forfatter(e) 2003. Gill Na+, K+-ATPase activity, plasma chloride and osmolality in juvenile turbot (Scophthalmus maximus) reared at different temperatures and salinities. Aquaculture. 671-683.
  • Vis forfatter(e) 2003. Exposure to continuous light inhibits maturation in turbot (Scophthalmus maximus). Aquaculture. 911-919.
  • Vis forfatter(e) 2003. A major water quality problem in smolt farms: combined effects of carbon dioxide, reduced pH and aluminium on Atlantic Salmon (Salmo salar L) smolts: physiology and growth. Aquaculture. 339-357.
  • Vis forfatter(e) 2002. The interrelation of growth and disease resistance of different populations of juvenile Atlantic halibut (Hippoglossus hippoglossus L.). Aquaculture. 167-177.
  • Vis forfatter(e) 2002. Susceptibility of three different strains of juvenile Atlantic halibut (Hippoglossus hippoglossus L.) cultured at two different temperatures to Vibrio anguillarum and temperature effect on antibody response. Fish and Shellfish Immunology. 111-123.
  • Vis forfatter(e) 2002. Effects of salinity acclimation on pre-smolt growth, smolting and post-smolt performance in off-season Atlantic salmon smolts (Salmo salar L.). Aquaculture. 125-137.
  • Vis forfatter(e) 2002. Comparison of growth and RNA : DNA ratios in three populations of juvenile turbot reared at two salinities. Journal of Fish Biology. 288-300.
  • Vis forfatter(e) 2001. Variation in food intake, food conversion efficiency and growth of juvenile turbot from different geographic strains. Journal of Fish Biology. 449-454.
  • Vis forfatter(e) 2001. Three forms of GnRH in the brain and pituitary of the turbot, Scophtalmus maximus: immunological characterization and seasonal variation. Comparative Biochemistry and Physiology - Part B: Biochemistry & Molecular Biology. 551-558.
  • Vis forfatter(e) 2001. The interaction of temperature and salinity on growth and food conversion in juvenile turbot (Scophthalmus maximus). Aquaculture. 353-367.
  • Vis forfatter(e) 2001. Temperature, light intensity and plasma melatonin levels in juvenile Atlantic salmon. Journal of Fish Biology. 431-438.
  • Vis forfatter(e) 2001. Selection or adaptation: Differences in growth performance of juvenile turbot (Scophthalmus maximus Rafinesque) from two close-by localities off Norway. Sarsia. 43-51.
  • Vis forfatter(e) 2001. Selection or adaptation: Differences in growth performance of juvenile turbot (Scophthalmus maximus Rafinesque) from two close-by localities off Norway. Sarsia. 43-51.
  • Vis forfatter(e) 2001. Photoperiod control and influence of body size on off-season parr-smolt transformation and post-smolt growth. Aquaculture. 291-307.
  • Vis forfatter(e) 2001. Feeding and prey-selection of wild Atlantic salmon post-smolts. Journal of Fish Biology. 1667-1679.
  • Vis forfatter(e) 2001. Daily profiles of plasma free thyroxine, total thyroxine, total triiodothyronine, and growth hormone in Atlantic salmon parr and smolts. Fish Physiology & Biochemistry.
  • Vis forfatter(e) 2001. Comparisons of RNA/DNA ratios, growth and metabolism of different populations of juvenile turbot Scophthalmus maximus reared at four temperatures. Journal of the World Aquaculture Society. 1-10.
  • Vis forfatter(e) 2000. The effect of different initial size distribution on the growth of Atlantic halibut (Hippoglossus hippoglossus L.). Journal of Fish Biology. 826-836.
  • Vis forfatter(e) 2000. Seawater adaptation of Atlantic salmon (Salmo salar L.) at different temperatures. Aquaculture, 181: 377-396. Aquaculture. 377-396.
  • Vis forfatter(e) 2000. RNA/DNA ratios, growth and metabolism of different populations of juvenile turbot Scophthalmus maximus reared at four temperatures. Journal of the World Aquaculture Society.
  • Vis forfatter(e) 2000. Intraspecific differences in physiological efficiency of juvenile Atlantic halibut Hippoglossus hippoglossus L. Journal of the World Aquaculture Society. 285-296.
  • Vis forfatter(e) 2000. Interaction of temperature and photoperiod on growth of Atlantic halibut Hippoglossus hippoglossus L. Aquaculture Research. 219-227.
  • Vis forfatter(e) 2000. Hemoglobin genotypes of turbot (Schophthalmus maximus): consequences for growth and variations in optimal temperature for growth. Fish Physiology & Biochemistry. 75-81.
  • Vis forfatter(e) 2000. Growth of juvenile halibut (Hippoglossus hippoglossus) under different photoperiods. Aquaculture. 119-128.
  • Vis forfatter(e) 2000. Geographic variation in growth and food conversion efficiency of juvenile Atlantic halibut related to latitude. Journal of Fish Biology. 279-294.
  • Vis forfatter(e) 2000. Free plasma thyroxine levels in coho salmon, Oncorhynchus kisutch, during parr-smolt transformation: comparison with total thyroxine, total triiodothyronine and growth hormone levels. Fish Physiology & Biochemistry. 45-50.
  • Vis forfatter(e) 2000. Effects of continuous additional light on growth and sexual maturity in Atlantic salmon, Salmo salar, reared in sea cages. Aquaculture. 337-349.
  • Vis forfatter(e) 2000. Countergradient variation in growth and growth efficiency of juvenile turbot. Journal of Fish Biology. 1213-1226.
  • Vis forfatter(e) 1999. Temperature- and size-dependent growth of larval and early juvenile Atlantic cod (Gadus morhua): a comparative study of Norwegian coastal cod and northeast Arctic cod. Canadian Journal of Fisheries and Aquatic Sciences. 2099-2111.
  • Vis forfatter(e) 1999. Mechanisms underlying photoperiodic effects on age at sexual maturity in Atlantic salmon, Salmo salar. Aquaculture. 47-60.
  • Vis forfatter(e) 1999. Effects of carbon dioxide on Atlantic salmon (Salmo salar L. ) smolts at constant pH in bicarbonate rich freshwater. Aquaculture. 171-187.
  • Vis forfatter(e) 1998. Effekter av karbondioksyd på laksesmolt. Norsk Fiskeoppdrett. 40-41.
  • Vis forfatter(e) 1998. Effects of size grading on growth and survival of juvenile turbot at two temperatures. Aquaculture International. 19-32.
  • Vis forfatter(e) 1998. Abrupt changes in photoperiod affect age at maturity, timing of ovulation and plasma testosterone and oestradiol-17 profiles in Atlantic salmon, Salmo salar. Aquaculture. 85-98.
  • Vis forfatter(e) 1997. Effects of exposure to extended photoperiods during the first winter on long-term growth and age at first maturity in turbot (Scophthalmus macimus). Aquaculture. 125-141.
  • Vis forfatter(e) 1995. Photoperiod Regulation of Plasma Growth Hormone Levels during Parr-Smolt Transformation of Atlantic Salmon: Implications for Hypoosmoregulatiory Ability and Growth. General and Comparative Endocrinology. 73-82.
  • Vis forfatter(e) 1995. Growth, oxygen consumption and activity of juvenile turbot (Scophthalamus maximus) reared under different temperatures and photoperiods. Netherlands Journal of Sea Research. 149-159.
  • Vis forfatter(e) 1995. Growth of juvenile halibut (Hippoglossus hippoglossus L.) related to temperature, day length and feeding regime. Netherlands Journal of Sea Research. 139-147.
  • Vis forfatter(e) 1995. Development of salinity tolerance in underyearling smolts of Atlantic salmon (Salmo salar) reared under different photoperiods. Canadian Journal of Fisheries and Aquatic Sciences. 243-251.
  • Vis forfatter(e) 1995. Development of salinity tolerance in underyearling smolts of Atlantic salmon (Salmo salar) reared under different photoperiods. Canadian Journal of Fisheries and Aquatic Sciences. 243-251.
  • Vis forfatter(e) 1995. Changes in serum protein and IgM concentration during smolting and early post-smolt period in vaccinated and unvaccinated Atlantic salmon (Salmo salar L.). Fish and Shellfish Immunology. 211-221.
  • Vis forfatter(e) 1994. The interrelation between photo-period, growth hormone, and sexual maturation of adult Atlantic salmon (Salmo salar). General and Comparative Endocrinology. 70-81.
  • Vis forfatter(e) 1994. Predation and dietary habits as possible explanations for poor return rates of stocked seatrout from the river Aurland. Norsk Geografisk Tidsskrift. 51-53.
  • Vis forfatter(e) 1994. Effects of photoperiod and temperature on growth and parr-smolt transformation in Atlantic salmon (Salmo salar L.) and subsequent performance in seawater. Aquaculture. 13-27.
  • Vis forfatter(e) 1994. Effect of reduced daylength on growth, sexual maturation and smoltification in Atlantic salmon (Salmo salar) underyearlings. Aquaculture. 289-230.
  • Vis forfatter(e) 1994. Effect of a simulated winter of different duration on growth and smoltification in Atlantic salmon (Salmo salar) underyearlings (Abstract). Aquaculture. 294.
  • Vis forfatter(e) 1993. Growth and Parr-smolt tranformation of Atlantic Salmon (Salmo salar L.) under different light intensities and subsequent survival and growth in seawater. Aquacultural Engineering. 231-243.
  • Vis forfatter(e) 1992. The potential for development of salinity tolerance in underyearling Atlantic salmon (Salmo salar). Journal of the World Aquaculture Society. 52-55.
  • Vis forfatter(e) 1992. The potential for development of salinity tolerance in underyearling Atlantic salmon (Salmo salar L.). World Aquaculture. 52-55.
  • Vis forfatter(e) 1992. Growth and sexual maturation in Atlantic salmon, Salmo salar L. reared in sea cages at two different light regimes. Aquaculture and Fisheries Management. 275-280.
  • Vis forfatter(e) 1992. First feeding of Atlantic salmon (Salmo salar L.) under different photoperiods. J Appl Ichtyol. 251-256.
  • Vis forfatter(e) 1992. Advancement and synchronization of ovulation in Atlantic salmon (Salmo salar L.) following injections of LHRH analogue. Aquaculture. 169-175.
  • Vis forfatter(e) 1991. Growth, parr-smolt transformation and changes in growth hormone of Atlantic salmon (Salmo salar) reared under different photoperiods. Canadian Journal of Fisheries and Aquatic Sciences. 2100-2108.
  • Vis forfatter(e) 1991. Growth and sexual maturation in Atlantic salmon (Salmo salar) reared in sea cages at two different light regimes. Aquaculture and Fisheries Management. 275-280.
  • Vis forfatter(e) 1991. First feeding of Atlantic salmon (Salmo salar) under different photoperiods. Journal of Applied Ichthyology. 251-256.
  • Vis forfatter(e) 1991. Continous light increases growth of Atlantic salmon (Salmo salar) postsmolts in seacages. Aquaculture. 281-287.
  • Vis forfatter(e) 1990. First feeding of Atlantic salmon, Salmo salar L., under different photoperiods and light intensities. Aquaculture and Fisheries Management. 435-441.
  • Vis forfatter(e) 1989. The influence of three unchanging photoperiods on growth and parr-smolt transformation i Atlantic salmon, (Salmo salar L.). Journal of Fish Biology. 237-247.
  • Vis forfatter(e) 1989. The effect of spectral composition on growth and smoltification in Atlantic salmon (Salmo salar) and subsequent growth i sea cages. Aquaculture. 155-162.
  • Vis forfatter(e) 1989. Growth of different families of Atlantic salmon (Salmo salar) under three experimental photperiods. Aquaculture. 271-281.
  • Vis forfatter(e) 1989. Effects of tank colour on growth and smoltification of Atlantic salmon (Salmo salar L.). Aquaculture. 379-386.
Vitenskapelig foredrag
  • Vis forfatter(e) 2019. The Freshwater Institute & CtrlAQUA, Norway: A multi-year research collaboration on RAS-based Atlantic salmon production. .
  • Vis forfatter(e) 2018. Adaptive immune responses of Atlantic salmon (Salmo salar L.) to stimulation by Salmonid alphavirus subtype 3 infection or vaccination.
  • Vis forfatter(e) 2017. The effects of photoperiod on Atlantic salmon post-smolt in freshwater closed-containment systems.
  • Vis forfatter(e) 2017. My skin don't lie. .
  • Vis forfatter(e) 2017. Korleis få professorar med på ein kollegial SoTL-kultur?
  • Vis forfatter(e) 2016. Semi-closed sea systems for postsmolt Atlantic salmon. (Abstract ID 42049).
  • Vis forfatter(e) 2016. SAV3 infection and shedding rate is dose dependent.
  • Vis forfatter(e) 2016. Osmoregulatory changes in sexually maturing Atlantic salmon post-smolt and adults.
  • Vis forfatter(e) 2016. Effects of androgens on osmoregulatory mechanisms in Atlantic salmon (Salmo salar L.).
  • Vis forfatter(e) 2016. Androgens up-regulate freshwater ion transporters in seawater acclimated Atlantic salmon (Salmo salar).
  • Vis forfatter(e) 2015. Semi-closed sea systems for postsmolt Atlantic salmon. Conference Abstract p. 123.
  • Vis forfatter(e) 2015. Physiological and immunological parameters affecting salmonid alphavirus infection in Atlantic salmon at post-smolt stages.
  • Vis forfatter(e) 2015. Immunological parameters correlating with viraemic period of salmonid alphavirus infection in Atlantic Salmon post-smolts.
  • Vis forfatter(e) 2015. Atlantic salmon, salmo salar I., post-smolts are more susceptible to salmonid alphavirus infection during the initial phase after seawater transfer.
  • Vis forfatter(e) 2015. Atlantic salmon, Salmon salar1, post-smolts are more susceptible to salmon alphavirus infection during the initial phase after sea water transfer.
  • Vis forfatter(e) 2015. Atlantic salmon post-smolts in RAS: effects of salinity, exercise and timing of seawater transfer on performance, physiology and welfare. In Book of abstracts, p. 39.
  • Vis forfatter(e) 2015. Atlantic salmon post-smolts in RAS: Effects of salinity, exercise and timing of seawater transfer on performance, physiology and welfare.
  • Vis forfatter(e) 2014. Tidlig kjønnsmodning påvirker laksens evne til å regulere vann- og salt balansen i sjø - et velferdsproblem?
  • Vis forfatter(e) 2014. The effects of increased CO2 on postsmolt Atlantic salmon Salmo salar growth, physiology and stress responsiveness.
  • Vis forfatter(e) 2014. Saltholdighet og fotoperiode påvirker postsmoltmodning og genuttrykk hos laksehanner.
  • Vis forfatter(e) 2014. Nutrient transport in the Atlantic salmon (Salmo salar) is affected by environmental salinity.
  • Vis forfatter(e) 2014. MitSAV: Mitigating the challenges in the Atlantic salmon aquaculture caused by salmonid alphavirus by unveiling the underlying immune mechanisms.
  • Vis forfatter(e) 2014. Effects of androgens and cortisol on gill ion transporters and osmoregulatory capacity in atlantic salmon.
  • Vis forfatter(e) 2014. EXPLORING PHYSIOLOGICAL FUNCTIONS OF THE PLEIOTROPHIC MELANOCORTIN ALPHA-MSH IN ATLANTIC SALMON.
  • Vis forfatter(e) 2013. Effects of salinity and exercise on Atlantic salmon postsmolts reared in land-based RAS.
  • Vis forfatter(e) 2012. Økende temperaturer fremskynder smoltutvikling hos Vosso laks. Resultat fra prosjektet: "The smolt probe - novel tools for assessment of smolt quality and marine performance in Atlantic salmon (SmoltProbe)".
  • Vis forfatter(e) 2009. Salmon lice induced mortality of Atlantic salmon postsmolts experiencing a previous history of poor water quality in freshwater.
  • Vis forfatter(e) 2009. Do exposure to saline water and intensive rearing during smoltification affect performance and disease resistance in Atlantic salmon?
  • Vis forfatter(e) 2009. Atlantic salmon smolt recovery rates following short term aluminum exposure.
  • Vis forfatter(e) 2008. Exploring the roles of leptin in fish.
  • Vis forfatter(e) 2006. Long-term separate and combined effects of environmental hypercapnia and hyperoxia in Atlantic Salmon Salmo salar L.smolts.
  • Vis forfatter(e) 2006. Long-term effects of reduced water flow, increased carbon dioxide and reduced pH(AI) on Atlantic Salmon welfare Salmo salar L.
  • Vis forfatter(e) 2005. Status og utfordringer innen vannkvalitet og vannbehandling for ulike livsstadier av laks ved intensivt oppdrett.
  • Vis forfatter(e) 2005. Salmon lice or suboptimal water quality ? reasons for reduced postsmolt survival?
  • Vis forfatter(e) 2005. Intensive rearing and welfare in juvenile Atlantic salmon.
  • Vis forfatter(e) 2005. Exposure to acid water and aluminium reduces Atlantic salmon postsmolt survival.
  • Vis forfatter(e) 2004. O2-overmetning. Fysiologi, helse og prestasjoner i sjøperioden.
  • Vis forfatter(e) 2004. Intensivt oppdrett av laksesmolt: konsekvenser for laksens prestasjoner i ferskvannsfasen og etter overføring til sjø.
  • Vis forfatter(e) 2004. Forsuring eller lakselus: effekter på postsmoltoverlevelse.
  • Vis forfatter(e) 2002. Smolting in anadromous and landlocked strains of Atlantic salmon (Salmo salar).
  • Vis forfatter(e) 2002. Effect of different dietary lipids on Atlantic salmon (Salmo salar) growth, fatty acid composition of Gills and Gill Na+, K+-ATPase Activity.
  • Vis forfatter(e) 2002. EFFECTS OF PHOTOPERIOD, TEMPERATURE AND GnRHa TREATMENT ON THE TIMING OF SPAWNING AND EGG AND SPERM QUALITY IN ATLANTIC SALMON (SALMO SALAR L.).
  • Vis forfatter(e) 2000. Three forms of GnRH in the brain and pituitary of the turbot, Scophthalmus maximus: immunological characterization and seasonal variation. Comp. Biochem. Physiol. 00, 000-000.
  • Vis forfatter(e) 1996. Lysregimet påvirker vekst hos ung kveite (Hippoglossus hippoglossus) i oppdrett.
  • Vis forfatter(e) 1994. Photoperiodic regulation of plasma growth hormone levels during parr-smolt transformation of Atlantic salmon: implications for hypoosmoregulatory ability and growth.
  • Vis forfatter(e) 1994. Photoperiod and temperature control of salinity tolerance, gill NA+, K+-ATPase activity and seawater performance underyearling Atlantic salmon (salmo salar L.).
  • Vis forfatter(e) 1993. Sammenheng mellom smoltkvalitet og immunsvar hos laks etter vaksinasjon med Vibrio salmonicida.
  • Vis forfatter(e) 1993. Growth of O%+ halibut related to temperature, light period and feeding regime.
  • Vis forfatter(e) 1992. The importance of fish size and photoperiod on growth in Atlantic salmon (Salmo salar) 0+ smolts.
  • Vis forfatter(e) 1992. Smolting in underyearling Atlantic salmon (Salmo salar).
  • Vis forfatter(e) 1992. Photoperiodic effects on growth, gonadal development and flesh colouring in Atlantic salmon (Salmo salar).
  • Vis forfatter(e) 1992. Photoperiodic control of sexual maturation in Atlantic salmon.
  • Vis forfatter(e) 1992. Parr-smolt transformation of Atlantic salmon (Salmo salar) at different water temperatures.
  • Vis forfatter(e) 1992. Growth and parr-smolt transformation of individually tagged Atlantic salmon (Salmo salar L.) transferred between continuous light and simulated natural photoperiod.
  • Vis forfatter(e) 1992. Effects of reduced daylength on growth and bimodality in Atlantic salmon (Salmo salar L.).
  • Vis forfatter(e) 1992. Effects of photoperiod and temperature on growth and parr-smolt transformation in Atlantic salmon (Salmo salar L.) and subsequent post-smolt performance in seawater.
  • Vis forfatter(e) 1991. Photoperiodic control of plasma growth hormone levels and sexual maturation of adult Atlantic salmon.
  • Vis forfatter(e) 1991. Photoperiodic control of growth, incidence of sexual maturation and ovulation in adult Atlantic salmon.
  • Vis forfatter(e) 1991. Growth and sexual maturation of Atlantic salmon under two temperature regimes in floating enclosures.
  • Vis forfatter(e) 1991. Growth and sexual maturation in reared Atlantic salmon (Salmo salar).
  • Vis forfatter(e) 1991. Factors affecting the quality of Atlantic salmon smolts for use in sea ranching.
  • Vis forfatter(e) 1991. Effects of photoperiod on plasma GtH 1 and GtH 2 levels during sexual maturation in Atlantic salmon.
  • Vis forfatter(e) 1991. Effect of photoperiod during parr-smolt transformation on sexual maturation in Atlantic salmon.
  • Vis forfatter(e) 1991. Consequences of seawater acclimation on the survival of Atlantic salmon (Salmo Salar L.) smolts in the presence of cod (Gadus morhua L.).
Sammendrag/abstract
  • Vis forfatter(e) 2005. Intensive rearing and welfare in juvenile Atlantic salmon. ?. 449-450.

Se fullstendig oversikt over publikasjoner i CRIStin.

2005 – nå

2014

Sundh, H., Nilsen, T.O., Lindström, J., Hasselberg-Frank, L., Stefansson, S.O., McCormick, S.D., Sundell, K. (2014).  Development of intestinal transport mechanisms during smoltification in Atlantic salmon smoltification and acclimation to seawater. J. Fish Biol. 85, 1227-1252. doi:10.1111/jfb.12531

Handeland, S.O., Imsland, A.K., Nilsen, T.O., Ebbesson, L.O.E., Hosfeld, C.D., Pedrosa, C., Stefansson, S.O., (2014). Osmoregulation in wild Atlantic salmon smolts transferred to seawater at different temperatures. J. Fish Biol., 85, 1163-1176. doi:10.1111/jfb.12481

Einarsdóttir, I.E., Gong, N., Jönsson-Bergman, E., Sundh, H., Hasselberg Frank, L., Nilsen, T.O., Stefansson, S.O., Sundell, K., Björnsson, B.Th., (2014). Plasma growth hormone binding protein levels in Atlantic salmon (Salmo salar L.) during smoltification and seawater transfer. J. Fish Biol. 85, 1279-1296. doi: 10.1111/jfb.12473

Imsland, AK, Handeland, SO and Stefansson, SO, 2014. Photoperiod and temperature effects on growth and maturation of pre- and post-smolt Atlantic salmon. Aquaculture International, 22, 1331-1345. doi: 10.1007/s10499-014-9750-1

Handeland, SO, Imsland, AK, Ebbesson, LOE, Nilsen, TO, Hosfeld, CD, Teien, HC and Stefansson, SO, 2014. Osmoregulation and growth in offspring of wild Atlantic salmon at different temperatures. Env. Biol. Fishes, 97, 285-296. doi: 10.1007/s10641-013-0151-5

2013

Nilsen, TO, LOE Ebbesson, SO Handeland, F Kroglund, B Finstad, AR Angotzi, SO Stefansson, 2013. Atlantic salmon (Salmo salar L.) smolts require more than two weeks to recover from acidic water and aluminum exposure. Aquatic Toxicol., 00, 000-000. doi.org/10.1016/j.aquatox.2013.07.016

Imsland, A. K., Handeland, S. O., Björnsson, B. Th. and Stefansson, S. O., 2013. Long-term effects of photoperiod and temperature and their interaction on growth, gill Na+,K+-ATPase activity, seawater tolerance and plasma growth hormone levels in Atlantic salmon. J. Fish Biol., 00, 000-000, MS 12-594.

Grassie, C., V.A. Braithwaite, J. Nilsson, T.O. Nilsen, H-C. Teien, S.O. Handeland, S.O. Stefansson, V. Tronci, M. Gorissen, G. Flik & L.O.E. Ebbesson, 2013. Aluminum exposure impacts brain plasticity and behavior in Atlantic salmon (Salmo salar). J. Exp. Biol., 216, 3148-3155, doi:10.1242/jeb.083550

Angotzi, A. R., Stefansson, S., Nilsen, T. O., Rathore, R. M. and Rønnestad, I. 2013. Molecular cloning and genomic characterization of novel Leptin-like genes in salmonids provide new insight into the evolution of the Leptin gene family. Gen. Comp. Endocrinol., 00, 000-000.

Handeland, S. O., Imsland, A. K., Ebbesson, L. O. E., Nilsen, T. O., Hosfeld, C. D., Teien, H. C. and Stefansson, S. O., 2013. Osmoregulation and growth in offspring of wild Atlantic salmon at different temperatures. Environmental Biology of Fishes, 00, 000-000.

Handeland, S. O., Imsland, A. K., Ebbesson, L. O. E., Nilsen, T. O., Hosfeld, C. D., Baeverfjord, G., Espmark, Å., Rosten, T., Skilbrei, O. T., Hansen, T., Gunnarsson, G. S., Breck, O. and Stefansson, S. O., 2013. Low light intensity can reduce Atlantic salmon smolt quality. Aquaculture, 384-387, 19-24. doi: org/10.1016/j.aquaculture.2012.12.016

Handeland, S. O., Imsland, A. K, Björnsson, B. Th., Stefansson, S. O. and Porter, M. 2013. Physiology during smoltification in Atlantic salmon: effect of melatonin implants. Fish Physiol. Biochem., 39, 1079-1088. doi: 10.1007/s10695-012-9765-3

Urke, H.A., Kristensen, T., Arnekleiv, J.V., Haugen, T.O., Kjærstad, G., Stefansson, S.O., Ebbesson, L.O.E. and Nilsen, T.O., 2013. Seawater tolerance and post-smolt migration of wild Atlantic salmon Salmo salar × brown trout S. trutta hybrid smolts, J. Fish Biol., 82, 206–227, doi:10.1111/j.1095-8649.2012.03481.x

2012

Koedijk, R., Imsland, A. K., Folkvord, A., Stefansson, S. O., Jonassen, T. M. and Foss, A., 2012. Larval rearing environment influences the physiological adaptation in juvenile Atlantic cod, Gadus morhua. Aquaculture International, 20, 467-479. doi: 10.1007/s10499-011-9478-0

Sandbakken, M., Helvik, J. V., Ebbesson, L. and Stefansson, S., 2012. Isolation and characterization of melanopsin photoreceptors of Atlantic salmon (Salmo salar). J. Comp. Neurology, 520, 3727-3744, doi: 10.1002/cne.23125

Kroglund, K., Finstad, B., Pettersen, K., Teien, H.C., Salbu, B., Rosseland, B.O., Nilsen, T.O., Stefansson, S.O., Ebbesson, L.O.E., Nilsen, R., Bjørn, P.A., Kristensen, T., 2012. Recovery rates in Atlantic salmon smolts following aluminum exposure defined by changes in blood physiology and salmon lice resistance. Aquaculture, 362-363, 232-240. doi:10.1016/j.aquaculture.2011.04.041

Finstad, B., Kroglund, K., Bjørn, P.A., Pettersen, K., Rosseland, B.O., Teien, H.C., Nilsen, T.O., Stefansson, S.O., Salbu, B., Nilsen, R., Fiske, P., Ebbesson, L.O.E., 2012. Salmon lice induced mortality of Atlantic salmon postsmolts experiencing episodic acidification and recovery in freshwater. Aquaculture, 362-363, 193-199. doi:10.1016/j.aquaculture.2010.10.037

Stefansson, S.O., Haugland, M., Björnsson, B.Th., McCormick, S.D., Holm, M., Ebbesson, L.O.E., Holst, J.C., Nilsen, T.O., 2012. Growth, osmoregulation and endocrine changes in wild Atlantic salmon post-smolts during marine migration. Aquaculture, 362-363, 127-136. doi:10.1016/j.aquaculture.2011.07.002

Kling, P., Jönsson, E., Nilsen, T. O., Einarsdottir, I. E., Rønnestad, I., Stefansson, S. O. and Björnsson, B. Th., 2012. The role of growth hormone in growth, lipid homeostasis, energy utilization and partitioning in rainbow trout: interactions with leptin, ghrelin and insulin-like growth factor I. Gen. Comp. Endocrinol., 175, 153-162 (doi.org/10.1016/j.ygcen.2011.10.014).

2011

Ebbesson, L.O.E., Nilsen, T.O., Helvik, J.V., Tronci, V. and Stefansson, S.O., 2011. Corticotropin-releasing factor neurogenesis during midlife development in salmon: genetic, environment and thyroid hormone regulation. J. Neuroendocrinol., 8, 733-741. doi:10.1111/j.1365-2826.2011.02164.x.

Angotzi, A. R., S. Mungpakdee, S. Stefansson, R. Male, D. Chourrout, 2011. Involvement of Prop1 homeobox gene in fish pituitary early development. Gen. Comp. Endocrinol., 171, 332–340. doi:10.1016/j.ygcen.2011.02.026

Imsland, A. K., Våge, K. A., Handeland, S. O. and Stefansson, S. O., 2011. Growth and osmoregulation in Atlantic salmon (Salmo salar) smolts in response to different feeding frequencies and salinities. Aquaculture Research, 42, 469-479. doi:10.1111/j.1365-2109.2010.02640.x

Imsland, A. K., R. Koedijk, S. O. Stefansson, A. Foss, S. Hjörleifsdóttir, G. Ó. Hreggvidsson, E. Otterlei and A. Folkvord, 2011. A retrospective approach to fractionize variation in body mass of Atlantic cod Gadus morhua. J. Fish Biol., 78, 251–264. doi:10.1111/j.1095-8649.2010.02860.x

Murashita, K., A.-E. Olderbakk Jordal, T. O. Nilsen, S. O. Stefansson, T. Kurokawa, B. Th. Björnsson, A.-G. Gamst Moen and I. Rønnestad, 2011. Leptin reduces Atlantic salmon growth through the central pro-opiomelanocortin pathway. Comp. Biochem. Physiol., 158, 79-86. doi:10.1016/j.cbpa.2010.09.001

Gunnarsson, S., A. K. Imsland, J. Arnason, A. Gustavsson, I. Arnarson, J. Kjartannsson, A. Foss, S. Stefansson and H. Thorarensen, 2011. Effect of rearing temperatures on the growth and maturation of Arctic charr (Salvelinus alpinus) during juvenile and on-growing periods. Aquaculture Research, 42, 221-229. doi:10.1111/j.1365-2109.2010.02615.x

Björnsson, B. Th., S. O. Stefansson and S. D. McCormick, 2011. Environmental endocrinology of salmon smoltification. Gen. Comp. Endocrinol., 170, 290-298. doi:10.1016/j.ygcen.2010.07.003

2010

Hosfeld, C. D., S. O. Handeland, S. Fivelstad and S. O. Stefansson, 2010. Physiological effects of normbaric environmental hyperoxia on Atlantic salmon (Salmo salar L.) presmolts. Aquaculture, 308, 28-33. doi:10.1016/j.aquaculture.2010.08.003

Koedijk, R. M., A. Folkvord, A. Foss, K. Pittman, S. O. Stefansson, S. Handeland and A. K. Imsland, 2010. The influence of first-feeding diet on the Atlantic cod Gadus morhua phenotype: survival, development and long-term consequences for growth. J. Fish Biol., 77, 1-19.

Koedijk R. M., Le Francois N. R., Blier P. U., Foss, A., Folkvord, A., Ditlecadet, D., Lamarre, S. G., Stefansson, S. O. and Imsland, A. K., 2010. Ontogenetic effects of diet during early development on growth performance, myosin mRNA expression and metabolic enzyme activity in Atlantic cod juveniles reared at different salinities. Comp. Biochem. Physiol., 156, 102-109.

Nilsen, T. O., Ebbesson, L. O. E., Kverneland, O. G., Kroglund, F., Finstad, B. and Stefansson, S. O., 2010. Effects of acidic water and aluminum exposure on gill Na+, K+-ATPase α-subunit isoforms, enzyme activity, physiology and return rates in Atlantic salmon (Salmo salar L.). Aquatic Toxicol., 97, 250–259.

Rønnestad, I., Nilsen, T. O., Murashita, K., Angotzi, A. R., Gamst-Moen, A-G., Stefansson, S. O., Kling, P., Björnsson, B. Th. and Kurokawa, T., 2010. Leptin and leptin receptor genes in Atlantic salmon: cloning, phylogeny, tissue distribution and expression correlated to long-term feeding status. Gen. Comp. Endocrinol., 168, 55-70.

2009

Stefansson, S. O., Imsland, A. K. and Handeland, S. O., 2009. Food-deprivation, compensatory growth and hydro-mineral balance in Atlantic salmon (Salmo salar) post-smolts in sea water. Aquaculture, 290, 243-249.

Hvidsten, N. A., Jensen, A. J., Rikardsen, A. H., Finstad, B., Aure, J., Stefansson, S., Fiske, P. and Johnsen, B. O., 2009. Influence of sea temperature and initial marine feeding on survival of Atlantic salmon Salmo salar post-smolts from the Rivers Orkla and Hals, Norway. J. Fish Biol., 74, 1532-1548.

Foss, A., Imsland, A. K., Vikingstad, E., Stefansson, S. O., Norberg, B., Pedersen, S., Sandvik, T. and Roth, B., 2009. Compensatory growth in Atlantic halibut: Effect of starvation and subsequent feeding on growth, maturation, feed utilization and flesh quality. Aquaculture, 290, 304-310.

Imsland, A. K, Jenssen, M. D., Jonassen, T. M. and Stefansson, S. O., 2009. Best among unequals? Effect of size grading and different social environments on the growth performance of juvenile Atlantic halibut. Aquaculture International, 17, 217-227.

Murashita, K., Kurokawa, T., Ebbesson, L. O. E., Stefansson, S. O., Rønnestad, I., 2009. Characterization, tissue distribution, and regulation of agouti-related protein (AgRP), cocaine- and amphetamine-regulated transcript (CART) and neuropeptide Y (NPY) in Atlantic salmon (Salmo salar). Gen. Comp. Endocrinol., 162, 160-171.

Kling, P., Rønnestad, I., Stefansson, S. O., Murashita, K., Kurokawa, T. and Bjornsson, B. Th., 2009. A homologous salmonid leptin radioimmunoassay indicates elevated plasma leptin levels during fasting of rainbow trout. Gen. Comp. Endocrinol., 162, 307-312.

Imsland, A. K., Roth, B., Foss, A., Vikingstad, E., Stefansson, S. O., Pedersen, S., Sandvik, T. and Norberg, B., 2009. Long-term effect of photoperiod manipulation on growth, maturation and flesh quality in Atlantic halibut. Aquaculture Research, 40, 1260-1269.

Hosfeld, C. D., Hammer, J., Handeland, S. O., Fivelstad, S. and Stefansson S. O., 2009. Effects of fish density on growth and smoltification in intensive production of Atlantic salmon (Salmo salar L.). Aquaculture, 294, 236-241.

Foss, A., Imsland, A. K., Roth, B., Schram, E. and Stefansson, S. O., 2009. Effects of chronic and periodic exposure to ammonia on growth and blood physiology in juvenile turbot (Scophthalmus maximus). Aquaculture, 296, 45-50.

2008

Remen, M., Imsland, A. K., Stefansson, S. O., Jonassen, T. M. and Foss, A., 2008. Interactive effects of ammonia and oxygen on growth and physiological status of juvenile Atlantic cod (Gadus morhua). Aquaculture, 274, 292-299.

Nilsen, T. O., Ebbesson, L. O. E., Kiilerich, P., Björnsson, B. Th., Madsen, S. S., McCormick, S. D. and Stefansson, S. O., 2008. Endocrine systems in juvenile anadromous and landlocked Atlantic salmon (Salmo salar): Seasonal development and seawater acclimation. Gen. Comp. Endocrinol., 155, 762-772.

Tipsmark, C. K., Kiilerich, P., Nilsen, T. O., Ebbesson, L. O. E., Stefansson, S. O. and Madsen, S. S., 2008. Branchial expression patterns of claudin isoforms in Atlantic salmon during seawater acclimation and smoltification. Am. J. Physiol. Regul. Integr. Comp. Physiol., 294, R1563-R1574.

Vikingstad, E., Andersson, E., Norberg, B., Mayer, I., Klenke, U., Zohar, Y., Stefansson, S. O. and Taranger, G. L., 2008. The combined effects of temperature and GnRHa treatment on the final stages of sexual maturation in Atlantic salmon (Salmo salar L.) females. Fish Physiol. Biochem., 34, 289-298.

Kolding, J., Haug, L. and Stefansson, S., 2008. Effect of ambient oxygen on growth and reproduction in Nile tilapia (Oreochromis niloticus). Can. J. Fish. Aquat. Sci., 65, 1413-1424.

Angotzi, A. R., Ersland, K. M., Mungpakdee S., Stefansson, S. and Chourrout, D., 2008. Independent and dynamic reallocation of pitx gene expression during vertebrate evolution, with emphasis on fish pituitary development. Gene, 417, 19-26.

Imsland A. K., Foss A., Roth, B., Stefansson S. O., Vikingstad, E., Pedersen, S., Sandvik ,T. and Norberg, B., 2008. Plasma insulin-like growth factor-I concentrations and growth in juvenile halibut (Hippoglossus hippoglossus): Effects of photoperiods and feeding regimes. Comp. Biochem. Physiol. A, 151, 66-70.

Hosfeld C. D.Engevik, A., Mollan, T., Lunde, T. M., Waagbo, R., Olsen, A. B., Breck, O., Stefansson, S., Fivelstad, S., 2008. Long-term separate and combined effects of environmental hypercapnia and hyperoxia in Atlantic salmon (Salmo salar L.) smolts. Aquaculture, 280, 146-153.

Handeland S. O., Imsland, A. K. and Stefansson, S. O., 2008. The effect of temperature and fish size on growth, feed intake, food conversion efficiency and stomach evacuation rate of Atlantic salmon post-smolts. Aquaculture, 283, 36-42.

Ebbesson L. O. E., Björnsson, B. T., Ekstroem, P. and Stefansson, S. O., 2008. Daily endocrine profiles in parr and smolt Atlantic salmon. Comp. Biochem. Physiol. A, 151, 698-704.

Moen, A. G. G., Stefansson, S., Jordal, A. E. O., Nilsen, T. O., Kurokawa, T., Björnsson, B. Th. and Ronnestad, I., 2008. Nutritional status of Atlantic salmon (Salmo salar) broodstock. Maternal effects on early expression of leptin, IGF-I, IGF-IR, and GHR. Cybium, 32, 62-63, Suppl. S.

Stefansson, S. O., Björnsson, B. Th., Ebbesson, L. O. E. and McCormick, S. D. 2008. Smoltification. In: Fish Larval Physiology (Finn, R.N. and Kapoor, B.G., Eds). Science Publishers, Inc. Enfield (NH) & IBH Publishing Co. Pvt. Ltd., New Delhi ISBN 978-1-57808-388-6.

2007

Fivelstad, S., Waagbø, R., Stefansson, S. and Olsen, A. B., 2007. Impacts of elevated water carbon dioxide partial pressure at two temperatures on Atlantic salmon (Salmo salar L.) parr growth and haematology. Aquaculture, 269, 241-249.

Imsland, A. K., A. Foss, A., Alvseike, T., Folkvord, S. O. Stefansson and T. M. Jonassen, 2007. Interaction between temperature and photoperiod on growth and feeding of Atlantic cod (Gadus morhua): possible secondary effects. Can. J. Fish. Aquat. Sci., 64, 239-248.

Imsland, A. K., Foss, A., Nævdal, G., Johansen, T., Stefansson, S. O. and Jonassen, Th. M., 2007. New haemoglobin genotypes in Atlantic cod, Gadus morhua: Possible relation with growth. Comp. Biochem. Physiol., 147, 955-960

Nilsen, T. O., Ebbesson, L. O. E., Madsen, S. S., McCormick, S. D., Andersson, E., Björnsson, B. Th., Prunet, P. and Stefansson, S. O., 2007. Differential expression of gill Na+,K+-ATPase α- and β-subunits Na+,K+,2Cl--cotransporter and CFTR anion channel in juvenile anadromous and landlocked Atlantic salmon Salmo salar. J. Exp. Biol., 210, 2885-2896.

Imsland, A. K., Björnsson, B. Th., Gunnarsson, S., Foss, A. and Stefansson, S. O., 2007. Temperature and salinity effects on plasma insulin-like growth factor-I concentrations and growth in juvenile turbot (Scophthalmus maximus). Aquaculture, 271, 546-552.

Imsland, A. K., Foss, A., Koedijk, R., Folkvord, A., Stefansson, S. O. and Jonassen, T. M., 2007. Persistent growth effects of temperature and photoperiod in Atlantic cod Gadus morhua. J. Fish Biol., 71, 1371-1382

Stefansson, S. O., Nilsen, T. O., Ebbesson, L. O. E., Wargelius, A., Madsen, S. S., Björnsson, B. Th. and McCormick, S. D., 2007. Molecular mechanisms of continuous light inhibition of Atlantic salmon parr-smolt transformation. Aquaculture, 273, 235-245.

Ebbesson, L. O. E., Ebbesson, S. O. E., Nilsen, T. O., Stefansson, S. O. and Holmqvist, B., 2007. Exposure to continuous light disrupts retinal innervation of the preoptic nucleus during parr-smolt transformation in Atlantic salmon. Aquaculture, 273, 345-349.

Kroglund, F., Finstad, B., Stefansson, S. O., Nilsen, T. O., Kristensen, T., Rosseland, B. O., Teien, H. C. and Salbu, B., 2007. Exposure to moderate acid water and aluminum reduces Atlantic salmon post-smolt survival. Aquaculture, 273, 360-373.

Finstad, B., Kroglund, F., Strand, R., Stefansson, S. O., Björn, P. A., Rosseland, B. O., Nilsen, T. O. and Salbu, B., 2007. Salmon lice or suboptimal water quality - Reasons for reduced postsmolt survival? Aquaculture, 273, 374-383.

2006

Bakke-McKellep, A. M., Refstie, S., Stefansson, S. O., Vanthanouvong, V., Roomans, G., Hemre, G. -I., Krogdahl, A., 2006. Effects of dietary soybean meal and photoperiod cycle on osmoregulation following seawater exposure in Atlantic salmon smolts. J. Fish Biol., 69, 1396-1426.

Heide, A., Foss A., Stefansson S. O., Mayer, I., Norberg, B., Roth, B., Jensen, M. D., Nortvedt, R. and Imsland A. K., 2006. Compensatory growth and fillet crude composition in juvenile Atlantic halibut: Effects of short term starvation periods and subsequent feeding. Aquaculture, 261, 109-117.

Imsland A. K., Wergeland T., Jonassen T. M., Stefansson S. O., 2006. Does malpigmentation improve growth in juvenile turbot (Scophthalmus maximus Rafinesque) and halibut (Hippoglossus hippoglossus L.)? Aquaculture Research, 37, 306-312.

Imsland A. K., Foss A., Koedijk R., Folkvord A., Stefansson S. O., Jonassen T. M., 2006. Short- and long-term differences in growth, feed conversion efficiency and deformities in juvenile Atlantic cod (Gadus morhua) startfed on rotifers or zooplankton. Aquaculture Research, 37, 1015-1027.

Imsland A. K., Foss A., Stefansson S. O., Mayer, I., Norberg, B., Roth, B., Jensen, M. D., 2006. Growth, feed conversion efficiency and growth heterogeneity in Atlantic halibut (Hippoglossus hippoglossus) reared at three different photoperiods. Aquaculture Research, 37, 1099-1106.

2005

Ebbesson, L. O. E., C. K. Tipsmark, B. Holmqvist, T. O. Nilsen, E. Andersson, S. O. Stefansson and S. S. Madsen, 2005. Nitric oxide synthase in the gill of Atlantic salmon: co-localization with and inhibition of the Na+,K+-ATPase. J. Exp. Biol., 208, 1011-1017.

Imsland, A. K., A. Foss, A. Folkvord, S. O. Stefansson and T. M. Jonassen, 2005. The interrelation between temperature regimes and fish size in juvenile Atlantic cod (Gadus morhua): effects on growth and feed conversion efficiency. Fish Physiol. Biochem., 31, 347-361.

Imsland, A. K., A. Foss, A. Folkvord, S. O. Stefansson and T. M. Jonassen, 2005. Genotypic response to photoperiod treatment in Atlantic cod (Gadus morhua). Aquaculture, 250, 525-532.

1995 – nå

Nasjonale prosjekter

NFR 108848 ‘Smoltkvalitet, sesonguavhengig utsetting og tidlig sjøvannsfase’, 1995 - 1998

NFR 108098 ‘Postsmoltøkologi – trofisk nivå og vandringer’, 1995 - 1997

NFR 110993 ‘Miljømessig og arvelig regulering av vekst hos ung kveite i oppdrett’, 1996 - 1999

NFR 122845 ‘Det arvelige grunnlaget for smoltifisering hos oppdrettslaks og villaks – en grunnleggende studie’, 1998 - 2000

NFR 133964 ’Vannbehov og vannkvalitet under intensiv smoltproduksjon. Hva er grenseverdiene og hvordan unngå skadelige effekter av lav vanngjennomstrømming, lav pH og høg CO2 under intensiv smoltproduksjon?’, 2000 – 2002

NFR 133937 ‘Control of age at first sexual maturity (puberty) in farmed Atlantic salmon’, 2000 – 2002

NFR 149790 'Distribution and ecology of post-smolt and salmon at sea', 2002 - 2005

NFR 149796 ‘The importance of early marine feeding on the growth and survival of Atlantic salmon post-smolt in Norwegian fjords’, 2002 - 2006

NFR 153230 ‘Environmental control of smolt brain development’, 2003 – 2005

NFR 165331 ‘Environmental impact and molecular regulation of the osmoregulatory gill during parr-smolt transformation in Atlantic salmon’, 2005 – 2007

NFR 172504 ’Nitric oxide regulation of development in fish: emphasis on the light-brain-pituitary axis and gill during salmon smoltification’, 2006 - 2008

NFR 163429 ‘Optimisation of harvested halibut by lowering maturation, increasing growth and improving flesh quality’ 2005 – 2007

NFR 165239 ‘Sjøvannsinnblanding i intensiv smoltproduksjon: effekter på helse, velferd og risiko for vintersår’, 2005 – 2007

NFR 1722630 ‘Progressive, modern production of juvenile Atlantic cod’ (PROCOD), 2006 - 2009

NFR 172514 ‘Moderne settefiskproduksjon av laks - normal utvikling og velferd i intensive oppdrettsystemer’, 2006 - 2009

NFR 184997 ‘Optimal smolt production and post smolt performance in the High North - Seawater intermixing, low temperatures and intensive rearing’ (NORSMOLT), 2008 – 2011

NFR 190469 ‘Fish welfare assessment through brain function: Impacts of environmental stress on brain plasticity and behaviour’, 2009 – 2011

NFR 199800 ‘The smolt probe - novel tools for assessment of smolt quality and marine performance in Atlantic salmon’, 2010 – 2012

NFR 199518 ‘Early puberty in salmon males in seawater - causes and consequences for hypoosmoregulatory ability and welfare’, 2010 – 2013

NFR 199482 ‘Cod Development CODE’, 2010 – 2013

NFR 217502 'Optimalisert postsmolt: et paradigmeskifte for norsk lakseindustri', 2012 - 2014

NFR 222215 'The smolt brain model: Unraveling nature´s regulation of neural plasticity', 2013 - 2015

Nasjonale strategiske program (Norges forskningsråd)

NFR 114646 ‘Teori- og eksperimentbasert studie av rekruttering hos marin fisk’, 1995 - 1998

NFR 136260 ‘Smolting in Atlantic salmon: the interrelationship between physiological, endocrine and immunological changes, and their genetic regulation’, 2000 - 2006

Andre nasjonale program (Fiskeri og havbruksnæringens forskningsfond, FHF)

FHF/NFR 155157 'Vannkvalitet – smoltkvalitet', 2003 – 2005

Internasjonale prosjekter

Nordisk Industri­fond 88.107 'Helårlig produksjon av atlantisk laks ved styrt kjønns­mo­dning og smoltifiser­ing', 1988 - 1991

EU, FAIR-CT96-1410 ‘Environmental and neuroendocrine control mechanisms in finfish reproduction and their application in broodstock management’, 1997 - 1999

EU, FAIR-CT97-3544 ‘A multidisciplinary evaluation and optimization of the production characteristics of different strains of commercially cultured flatfish’, 1998 - 2000

Wallenberg stiftelsen, 1997 - 2001

- ‘Aquaculture and Fisheries Development: Basic Research on Finfish Reproduction and Growth Enabling the Intensification of Aquaculture’

- ‘The Multiple Gonadotropin-Releasing Hormones (GnRH) of Fish: Functions and Potential Use for Spawning Manipulations in Commercially and Ecologically Important Fish Species’

EU, QoL, QLRT-2001-01801 ‘Photoperiod control of puberty in farmed fish: Development of new techniques and research into underlying physiological mechanisms’, 2002 - 2005

EU, LSF ‘Marine Pelagic Food Chain Research’, (Contract No ERBFMGECT950013)

Forskningssamarbeid/tema:

Professor Niall Bromage, University of Stirling, Skottland

- Temperature effects on melatonin in post-smolt Atlantic salmon (Salmo salar), 1997

Professor Sjoerd E. Wendelaar Bonga, Katholieke Universiteit Nijmegen, Nederland

- The effect of temperature on growth performance and stress resistance in two generations of turbot (Scophthalmus maximus Rafinesque), 1997

- Influence of temperature and feeding ration on the bioenergetics of juvenile turbot (Scophthalmus maximus) and Atlantic halibut (Hippoglossus hippoglossus), 1998

Dr. Richard FitzGerald, University College Cork, Irland

- The effect of different initial size distribution on the growth of Atlantic halibut (Hippoglossus hippoglossus L.), 1998

Dr. Ewa Kulczykowska, Marine Biology Center of Polish Academy of Sciences, Gdynia, Polen

- Melatonin – Arginine vasotocin relationship during development of Salmo salar, 2001

EU, Improving Human Potential, Access to Research Infrastructure, Institute of Aquaculture, University of Stirling, Skottland, Contract HPRI-CT-1999-00106

Professor Niall Bromage

- Endocrine regulation of growth and food intake in salmon smolts, 2000/2001

EU, FP7-KBBE-2007-2A, 222719, LIFECYCLE—Building a biological knowledge-base on fish lifecycles for competitive, sustainable European aquaculture (01.03.2009 – 28.02.2013)

Senter

Senter for forskningsdrevet innovasjon (SFI): Centre for Research-based Innovations in Controlled-environment Aquaculture (CtrlAQUA), finansiert, vil bli etablert i April 2015

Cand. scient., Institutt for fiskeribiologi, Universitetet i Bergen (UiB), 25.06.1986

Avhandling: Lysperiodens virkning på vekst og smoltifiser­ing hos laks (Salmo salar L.)

Dr. scient., Institutt for fiskeri- og marinbiologi, UiB, 10.12.1990

Avhandling: The influence of light on growth and parr-smolt trans­formation of Atlantic salmon (Salmo salar L.): Effects of spectral composition, light intensity and photoperiod

Forskergrupper