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University of Bergen
Tom Ole Nilsen's picture

Tom Ole Nilsen

Associate Professor
Department of Biological Sciences (BIO)
  • E-mailtom.nilsen@uib.no
  • Phone+47 55 58 44 16
  • Visitor Address
    Thormøhlens gate 53 A/B
    5006 Bergen
    Room 
    340A2
  • Postal Address
    Postboks 7803
    5020 Bergen
Academic article
  • Show author(s) (2023). Atlantic salmon male post-smolt maturation can be reduced by using a 3-hour scotophase when inducing smoltification. Aquaculture.
  • Show author(s) (2022). Increased Thermal Challenges Differentially Modulate Neural Plasticity and Stress Responses in Post-Smolt Atlantic Salmon (Salmo salar). Frontiers in Marine Science. 16 pages.
  • Show author(s) (2022). Exposure to cold temperatures differentially modulates neural plasticity and stress responses in post-smolt Atlantic salmon (Salmo salar). Aquaculture. 11 pages.
  • Show author(s) (2022). Changes in circulating insulin-like growth factor-1 and its binding proteins in yearling rainbow trout during spring under natural and manipulated photoperiods and their relationships with gill Na+, K+-ATPase and body size. Comparative Biochemistry and Physiology A. 10 pages.
  • Show author(s) (2021). Validating timing of salmon smolt runs obtained by telemetry studies. Fisheries Management and Ecology. 428-436.
  • Show author(s) (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. Aquaculture. 13 pages.
  • Show author(s) (2021). Triploid Atlantic salmon and triploid Atlantic salmon × brown trout hybrids have better freshwater and early seawater growth than diploid counterparts. Aquaculture. 11 pages.
  • Show author(s) (2021). Sulfate homeostasis in Atlantic salmon is associated with differential regulation of salmonid-specific paralogs in gill and kidney. Physiological Reports. 1-21.
  • Show author(s) (2020). Physiological changes in off-season smolts induced by photoperiod manipulation in masu salmon (Oncorhynchus masou). Aquaculture. 1-9.
  • Show author(s) (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.
  • Show author(s) (2020). Molecular and physiological responses to long-term carbon dioxide exposure in Atlantic salmon (Salmo salar). Aquaculture. 1-9.
  • Show author(s) (2020). Intact rather than total circulating insulin-like growth factor binding protein-1a is a negative indicator of growth in masu salmon. American Journal of Physiology. Regulatory Integrative and Comparative Physiology. R329-R337.
  • Show author(s) (2020). Hypothalamic agrp and pomc mRNA Responses to Gastrointestinal Fullness and Fasting in Atlantic Salmon (Salmo salar, L.). Frontiers in Physiology.
  • Show author(s) (2020). Expression and localization of the aryl hydrocarbon receptors and cytochrome P450 1A during early development of Atlantic cod (Gadus morhua). Aquatic Toxicology. 10 pages.
  • Show author(s) (2020). Comparison of anadromous and landlocked Atlantic salmon genomes reveals signatures of parallel and relaxed selection across the Northern Hemisphere. Evolutionary Applications. 1-16.
  • Show author(s) (2019). The use of photoperiods to provide year round spawning in lumpfish Cyclopterus lumpus. Comparative Biochemistry and Physiology A. 62-70.
  • Show author(s) (2019). The effects of carbon dioxide on growth performance, welfare, and health of Atlantic salmon post-smolt (Salmo salar) in recirculating aquaculture systems. Aquaculture. 578-586.
  • Show author(s) (2019). Effects of temperature and photoperiod on rainbow trout (Oncorhynchus mykiss) smoltification and haematopoiesis. Aquaculture.
  • Show author(s) (2019). Effects of different photoperiod regimes on the smoltification and seawater adaptation of seawater-farmed rainbow trout (Oncorhynchus mykiss): Insights from Na+, K+-ATPase activity and transcription of osmoregulation and growth regulation genes. Aquaculture. 282-292.
  • Show author(s) (2018). Sexual maturation and smoltification in domesticated Atlantic salmon (Salmo salar L.) - is there a developmental conflict? Physiological Reports. 1-18.
  • Show author(s) (2018). Oxygen Uptake and Osmotic Balance of Atlantic Salmon in Relation to Exercise and Salinity Acclimation. Frontiers in Marine Science. 1-11.
  • Show author(s) (2018). Comparison between Atlantic salmon Salmo salar post-smolts reared in open sea cages and in the Preline raceway semi-closed containment aquaculture system. Journal of Fish Biology. 567-579.
  • Show author(s) (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.
  • Show author(s) (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.
  • Show author(s) (2017). Water temperature and dietary histidine affect cataract formation in Atlantic salmon (Salmo salar L.) diploid and triploid yearling smolt. Journal of Fish Diseases. 1195-1212.
  • Show author(s) (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.
  • Show author(s) (2017). Stocking density limits for post-smolt Atlantic salmon (Salmo salar L.) emphasis on production performance and welfare. Aquaculture. 363-370.
  • Show author(s) (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.
  • Show author(s) (2017). How do individuals cope with stress? Behavioural, physiological and neuronal differences between proactive and reactive coping styles in fish. Journal of Experimental Biology. 1524-1532.
  • Show author(s) (2016). The two-step development of a duplex retina involves distinct events of cone and rod neurogenesis and differentiation. Developmental Biology. 389-401.
  • Show author(s) (2016). Impact of fish density and specific water flow on skin properties in Atlantic salmon (Salmo salar L.) post-smolts. Aquaculture. 629-637.
  • Show author(s) (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.
  • Show author(s) (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 pages.
  • Show author(s) (2015). Functional divergence of type 2 deiodinase paralogs in the Atlantic salmon. Current Biology. 936-941.
  • Show author(s) (2015). Effects of mining chemicals on fish: exposure to tailings containing Lilaflot D817M induces CYP1A transcription in Atlantic salmon smolt. BMC Research Notes.
  • Show author(s) (2015). Androgens directly stimulate spermatogonial differentiation in juvenile Atlantic salmon (Salmo salar). General and Comparative Endocrinology. 52-61.
  • Show author(s) (2014). Plasma growth hormone-binding protein levels in Atlantic salmon Salmo salar during smoltification and seawater transfer. Journal of Fish Biology. 1279-1296.
  • Show author(s) (2014). Osmoregulation in Atlantic salmon Salmo salar smolts transferred to seawater at different temperatures. Journal of Fish Biology. 1163-1176.
  • Show author(s) (2014). Osmoregulation and growth in offspring of wild Atlantic salmon at different temperatures. Environmental Biology of Fishes. 285-296.
  • Show author(s) (2014). Long‐term hypo‐osmoregulatory capacity in downstream migrating Atlantic salmon Salmo salar L. smolts. Journal of Fish Biology. 1131-1144.
  • Show author(s) (2014). Effects of cortisol on the intestinal mucosal immune response during cohabitant challenge with IPNV in Atlantic salmon (Salmo salar). PLOS ONE.
  • Show author(s) (2014). Development of seawater tolerance and subsequent downstream migration in wild and stocked young-of-the-year derived Atlantic salmon Salmo salar smolts. Journal of Fish Biology. 178-192.
  • Show author(s) (2014). Development of intestinal ion-transporting mechanisms during smoltification and seawater acclimation in Atlantic salmon Salmo salar. Journal of Fish Biology. 1227-1252.
  • Show author(s) (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.
  • Show author(s) (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.
  • Show author(s) (2013). Low light intensity can reduce Atlantic salmon smolt quality. Aquaculture. 19-24.
  • Show author(s) (2013). Environmental enrichment promotes neural plasticity and cognitive ability in fish. Proceedings of the Royal Society of London. Biological Sciences. 7 pages.
  • Show author(s) (2013). Environmental enrichment promotes neural plasticity and cognative behaviour in fish. Proceedings of the Royal Society of Edinburgh Section B.
  • Show author(s) (2013). Atlantic salmon (Salmo salar L.) smolts require more than two weeks to recover from acidic water and aluminium exposure. Aquatic Toxicology. 33-44.
  • Show author(s) (2013). Aluminum exposure impacts brain plasticity and behavior in Atlantic salmon (Salmo salar). Journal of Experimental Biology. 3148-3155.
  • Show author(s) (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.
  • Show author(s) (2012). Salmon lice-induced mortality of Atlantic salmon postsmolts experiencing episodic acidification and recovery in freshwater. Aquaculture. 193-199.
  • Show author(s) (2012). Recovery of Atlantic salmon smolts following aluminum exposure defined by changes in blood physiology and seawater tolerance. Aquaculture. 232-240.
  • Show author(s) (2012). Growth, osmoregulation and endocrine changes in wild Atlantic salmon smolts and post-smolts during marine migration. Aquaculture. 127-136.
  • Show author(s) (2011). Leptin reduces Atlantic salmon growth through the central pro-opiomelanocortin pathway. Comparative Biochemistry and Physiology A. 79-86.
  • Show author(s) (2011). Corticotropin-Releasing Factor Neurogenesis during Midlife Development in Salmon: Genetic, Environmental and Thyroid Hormone Regulation. Journal of neuroendocrinology. 733-741.
  • Show author(s) (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.
  • Show author(s) (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.
  • Show author(s) (2009). Ghrelin, cholecystokinin, and peptide YY in Atlantic salmon (Salmo salar): Molecular cloning and tissue expression. General and Comparative Endocrinology. 223-235.
  • Show author(s) (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.
  • Show author(s) (2008). Endocrine systems in juvenile anadromous and landlocked Atlantic salmon (Salmo salar): Seasonal development and seawater acclimation. General and Comparative Endocrinology. 762-772.
  • Show author(s) (2008). Branchial expression patterns of claudin isoforms in Atlantic salmon during seawater acclimation and smoltification. American Journal of Physiology. Regulatory Integrative and Comparative Physiology. R1563-R1574.
  • Show author(s) (2007). Salmon lice or suboptimal water quality - Reasons for reduced postsmolt survival? Aquaculture. 374-383.
  • Show author(s) (2007). Oligopeptide transporter PepT1 in Atlantic cod (Gadus morhua L.): cloning, tissue expression and comparative aspects. Journal of Experimental Biology. 3883-3896.
  • Show author(s) (2007). Molecular mechanisms of contiuous light inhibition of Atlantic salmon parr-smolt transformation. Aquaculture. 235-245.
  • Show author(s) (2007). Molecular mechanisms of continuous light inhibition of Atlantic salmon parr-smolt transformation. Aquaculture. 235-245.
  • Show author(s) (2007). Exposure to moderate acid water and aluminum reduces Atlantic salmon post-smolt survival. Aquaculture. 360-373.
  • Show author(s) (2007). Exposure to continuous light disrupts retinal innervation of the preoptic nucleus during parr-smolt transformation in Atlantic salmon. Aquaculture. 345-349.
  • Show author(s) (2007). Differential expression of gill Na+,K+-ATPase alpha- and beta-subunits, Na+,K+,2Cl(-) cotransporter and CFTR anion channel in juvenile anadromous and landlocked Atlantic salmon Salmo salar. Journal of Experimental Biology.
  • Show author(s) (2005). Nitric oxide synthase in the gill of Atlantic salmon: colocalization with and inhibition of Na+,K+-ATPase. Journal of Experimental Biology. 1011-1017.
  • Show author(s) (2005). Evaluation of potential reference genes in real-time RT-PCR studies of Atlantic salmon. BMC Molecular Biology. 1-9.
  • Show author(s) (2003). Smolting in anadromous and landlocked strains of Atlantic salmon (Salmo salar). Aquaculture. 71-82.
Report
  • Show author(s) (2017). Vandringsmønsteret til laksesmolt i Vossovassdraget med vekt på detaljert kartlegging av åtferd i innsjøsystema og effektar av miljøtilhøve. 41. 41. .
  • Show author(s) (2011). Påvirkes laksesmolt av aluminium i brakkvann? Telemetriundersøkelser i Storelva i Holt, Aust-Agder, 2007. 6245. 6245. .
  • Show author(s) (2011). Are salmon smolt affected by aluminum in estuaries? Results from River Storelva, 2008. 6246. 6246. .
Lecture
  • Show author(s) (2019). INFLUENCE OF WATER TEMPERATURE AND FEEDING REGIME ON THE INCIDENCE OF EARLY SEXUAL MATURATION IN ATLANTIC SALMON (Salmo salar L.) POSTSMOLTS DURING THE FRESHWATER STAGE.
  • Show author(s) (2018). Plasma proteome during smoltification and seawater adaptation of steelhead trout (Oncorhynchus mykiss).
  • Show author(s) (2018). Plasma and liver proteome of an unwanted phenotype of seawater-transferred rainbow trout (Oncorhynchus mykiss).
  • Show author(s) (2018). Mass Spectrometry-Based Plasma Proteomics for Steelhead Trout (Oncorrhynchus mykiss) Aquaculture.
  • Show author(s) (2018). Effects of high environmental CO2 levels on Atlantic salmon post-smolts .
  • Show author(s) (2018). Changes in plasma proteome and peptidome during smoltification and seawater adaptation of steelhead trout (Oncorhynchus mykiss).
  • Show author(s) (2017). Muscle development and heart condition in Atlantic salmon (Salmo salar) post-­smolts reared in Preline S-CCS.
  • Show author(s) (2017). Infection of Diploid and Triploid Atlantic Salmon with Salmonid Alpha Virus Subtype 3 (SAV3).
  • Show author(s) (2017). A comparative study of diploid and triploid Atlantic salmon post-smolts upon SAV-3 bath challenge and their immune transcriptomatic responses.
  • Show author(s) (2016). Immune responses in Atlantic salmon bath infected with salmonid alphavirus.
  • Show author(s) (2016). Effect of stress on wound healing and gene regulation in skin of posts-smolts (Salmo salar L.) in closed-containment aquaculture systems (in Norwegian). In Abstracts RCN Program conference Mariculture 2016.
  • Show author(s) (2016). Atlantisk laks er mer utsatt ved 2 uker enn ved 9 uker etter sjøvannutsett til SAV3 infeksjon.
Academic lecture
  • Show author(s) (2022). Assessing the effects of water temperature on precocious maturation in Atlantic salmon Salmo salar post-smolts .
  • Show author(s) (2020). Hvilke CO2-nivå kan anbefales for oppdrett av laks i RAS?
  • Show author(s) (2019). The effect of carbon dioxide exposure on Atlantic Salmon.
  • Show author(s) (2019). The Freshwater Institute & CtrlAQUA, Norway: A multi-year research collaboration on RAS-based Atlantic salmon production. .
  • Show author(s) (2019). Genomic regions under selection in landlocked Atlantic salmon.
  • Show author(s) (2018). The effect of carbon dioxide on fish growth performance in recirculating aquaculture systems. .
  • Show author(s) (2018). Examining attitudes towards scientific teaching practice across culture. .
  • Show author(s) (2018). Adaptive immune responses of Atlantic salmon (Salmo salar L.) to stimulation by Salmonid alphavirus subtype 3 infection or vaccination.
  • Show author(s) (2017). The effects of photoperiod on Atlantic salmon post-smolt in freshwater closed-containment systems.
  • Show author(s) (2017). The effect of carbon dioxide on performance, health and welfare of Atlantic salmon post-smolts in recirculating aquaculture systems.
  • Show author(s) (2017). Effects of processed fine-fraction iron ore on smoltification parameters and seawater tolerance in Atlantic salmon smolt.
  • Show author(s) (2016). What is parr, smolt, large smolts, postsmolt, juveniles? Are you confused?
  • Show author(s) (2016). Welfare and performance of Atlantic salmon post-smolts during exposure to mild chronic stress in recirculation aquaculture system (RAS). .
  • Show author(s) (2016). Welfare and performance of Atlantic salmon post-smolts during exposure to mild chronic stress in closed-containment systems. In Aquaculture Europe 2016 Abstracts, pp 533-534.
  • Show author(s) (2016). The impact of chronic stress on the barrier function of the skin in Atlantic salmon Salmo salar reared in closed containment systems. In Aquaculture Europe 2016 Abstracts, pp 992-993.
  • Show author(s) (2016). Semi-closed sea systems for postsmolt Atlantic salmon. (Abstract ID 42049).
  • Show author(s) (2016). Osmoregulatory changes in sexually maturing Atlantic salmon post-smolt and adults.
  • Show author(s) (2016). Effects of androgens on osmoregulatory mechanisms in Atlantic salmon (Salmo salar L.).
  • Show author(s) (2016). Androgens up-regulate freshwater ion transporters in seawater acclimated Atlantic salmon (Salmo salar).
  • Show author(s) (2015). Vanntemperatur og histidin i fôret påvirker utviklingen av katarakt hos diploid og triploid laksesmolt i ferskvann og sjøvann.
  • Show author(s) (2015). Physiological and immunological parameters affecting salmonid alphavirus infection in Atlantic salmon at post-smolt stages.
  • Show author(s) (2015). Immunological parameters correlating with viraemic period of salmonid alphavirus infection in Atlantic Salmon post-smolts.
  • Show author(s) (2015). Atlantic salmon, salmo salar I., post-smolts are more susceptible to salmonid alphavirus infection during the initial phase after seawater transfer.
  • Show author(s) (2015). Atlantic salmon, Salmon salar1, post-smolts are more susceptible to salmon alphavirus infection during the initial phase after sea water transfer.
  • Show author(s) (2014). Tidlig kjønnsmodning påvirker laksens evne til å regulere vann- og salt balansen i sjø - et velferdsproblem?
  • Show author(s) (2014). The effects of increased CO2 on postsmolt Atlantic salmon Salmo salar growth, physiology and stress responsiveness.
  • Show author(s) (2014). Saltholdighet og fotoperiode påvirker postsmoltmodning og genuttrykk hos laksehanner.
  • Show author(s) (2014). Oppdrett av postsmolt laks i semilukkede system; Krav til fisketetthet og vannforbruk.
  • Show author(s) (2014). Nutrient transport in the Atlantic salmon (Salmo salar) is affected by environmental salinity.
  • Show author(s) (2014). Neural characterization of coping styles in farmed Atlantic salmon.
  • Show author(s) (2014). Migratory behaviour and physiological status of post-spawners of Atlantic salmon (Salmo salar L.) in River Lærdalselva, Norway.
  • Show author(s) (2014). Effects of androgens and cortisol on gill ion transporters and osmoregulatory capacity in atlantic salmon.
  • Show author(s) (2014). EXPLORING PHYSIOLOGICAL FUNCTIONS OF THE PLEIOTROPHIC MELANOCORTIN ALPHA-MSH IN ATLANTIC SALMON.
  • Show author(s) (2013). Effects of salinity and exercise on Atlantic salmon postsmolts reared in land-based RAS.
  • Show author(s) (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)".
  • Show author(s) (2009). Salmon lice induced mortality of Atlantic salmon postsmolts experiencing a previous history of poor water quality in freshwater.
  • Show author(s) (2009). Atlantic salmon smolt recovery rates following short term aluminum exposure.
  • Show author(s) (2008). Exploring the roles of leptin in fish.
  • Show author(s) (2007). Expression of the digestive hormone cholecystokinin, CCK, in developing Atlantic cod (Gadus morhua).
Editorial
  • Show author(s) (2018). Advances in our understanding of the parr-smolt transformation of juvenile salmon: a summary of the 10th International Workshop on Salmon Smoltification. Journal of Fish Biology. 437-439.
Thesis at a second degree level
  • Show author(s) (2002). Smolting in anadromous and landlocked strains of Atlantic salmon (Salmo salar).
Popular scientific article
  • Show author(s) (2015). Utvikling av osmoreguleringssystemet hos torskelarver startfôret på rotatorier eller naturlig zooplankton. Norsk Fiskeoppdrett. 36-38.
  • Show author(s) (2010). Ny metode kan påvise skader hos laksesmolt som er utsatt for aluminiumsrikt surt vann. pH-status : forum for sur nedbør og kalking. 12-13.
Interview
  • Show author(s) (2017). – Forskning på laksens behov er nøkkelen til bærekraftig lakseoppdrett i lukkede oppdrettsanlegg.
  • Show author(s) (2017). International collaboration gives better fish farming.
  • Show author(s) (2017). Internasjonalt samarbeid om lukkede anlegg.
  • Show author(s) (2015). Satser på histologi, rognkjeks og ny smoltanalyse.
  • Show author(s) (2015). Nytt analyseverktøy skal sikre riktig tidspunkt for smoltutsett.
Academic chapter/article/Conference paper
  • Show author(s) (2018). The effect of carbon dioxide on fish growth performance in recirculating aquaculture systems. 1 pages.
  • Show author(s) (2018). Effects of high environmental CO2 levels on Atlantic salmon post-smolts. 1 pages.
  • Show author(s) (2007). Fysiologiske egenskaper ved rogn, yngel og smolt. 30 pages.
  • Show author(s) (2007). Fysiologiske egenskaper ved rogn, yngel og smolt. 31 pages.
Abstract
  • Show author(s) (2016). Effects of Intraperitoneal Administration of Leptin on Voluntary Feed Intake, Appetite Signaling Pathways and Metabolism in Atlantic salmon, Salmo salar. The FASEB Journal. 644-644.
Poster
  • Show author(s) (2019). The effect of temperature on stress disturbance and skin barrier functions in Atlantic salmon (Salmo salar L. ) post- smolts.
  • Show author(s) (2019). How Does Temperature Affect Primary Barrier Functions in Atlantic Salmon (Salmo Salar L.) Post-Smolts?
  • Show author(s) (2019). CtrlAQUA SFI – Contribution to Future Aquaculture.
  • Show author(s) (2016). Turning light into hormonal signalling: mapping the melatonin receptive cells in the brain of the juvenile Atlantic salmon (Salmo salar), and circadian and seasonal variations through smoltification.
  • Show author(s) (2016). How do individuals cope with stress? A neuroendocrine substrate for proactive and reactive coping styles in fish.
  • Show author(s) (2016). Farming intensification - impact on mental and physiological robustness of post-smolt Atlantic salmon (Salmo salar).
  • Show author(s) (2016). Elevated plasma cortisol Levels and decreased intestinal barrier function in Atlantic cod (Gadus Morhua) reared in brackish water - a result of acclimation to low salinity or chronic stress?
  • Show author(s) (2016). Effects of intraperitoneal administration of leptin on voluntary feed intake, appetite signaling pathways and metabolism in Atlantic salmon, Salmo salar.
  • Show author(s) (2016). Chronic ghrelin treatment stimulates food intake and growth in Atlantic salmon.
  • Show author(s) (2009). Increased susceptibility to metal mine discharges during the smolt stage of Atlantic salmon (Salmo salar L.).
  • Show author(s) (2008). Production of recombinant salmon leptin and its effects on growth in Atlantic salmon (Salmo salar).
  • Show author(s) (2008). Production of recombinant salmon leptin and its effects on growth in Atlantic salmon (Salmo salar).
  • Show author(s) (2008). Digestive function in Atlantic cod larvae- effects of intensive and extensive rearing systems and correlation with peaks in mortality.
  • Show author(s) (2007). Using different normalization strategies and reference genes when examining the expression of PepT1 in the developing digestive tract of larval Atlantic cod (Gadus morhua).
  • Show author(s) (2007). Ontogenetic expression of the oligopeptide transporter PepT1 in Atlantic cod (Gadus morhua) studied by in situ hybridization.
  • Show author(s) (2007). Nutritional status of Atlantic salmon (Salmo salar) broodstock- A preliminary study on the maternal effects on early expression of leptin, IGF-I, IGF-IR, GH and GHR.
  • Show author(s) (2007). Exploring the functions of leptin in fish.
  • Show author(s) (2001). Temporal and spatial expression of the oligopeptide transporter PepT1 in the digestive tract of larval Atlantic cod (Gadus morhua).
Academic literature review
  • Show author(s) (2021). Ion transporters and osmoregulation in the kidney of teleost fishes as a function of salinity. Frontiers in Physiology. 25 pages.
  • Show author(s) (2015). Stress in Atlantic salmon: Response to unpredictable chronic stress. Journal of Experimental Biology. 2538-2550.
Article in business/trade/industry journal
  • Show author(s) (2023). Statistical modelling of voluntary feed intake in individual Atlantic salmon (Salmo salar L.). Frontiers in Marine Science.
  • Show author(s) (2014). Krav til fisketetthet og vannforbruk. Norsk Fiskeoppdrett. 42-50.

More information in national current research information system (CRIStin)

Publications in Per-Review Journals

Urke, H.A., Arnekleiv, J.V., Nilsen, T.O., Nilssen, K.J. (2014). Development of seawater tolerance and subsequent downstream migration in wild and stocked young-of-the-year derived Atlantic salmon Salmo salar. Journal of Fish Biology 84, 178 - 192.

Handeland, S.O., Ebbesson, L.O.E., Nilsen, T.O., Hosfeld, C.D., Teien, H.C., Stefansson, S.O. (2014). Osmoregulation and growth in wild Atlantic salmon smolts at different temperatures. Environmental Biology of Fishes EBFI-D-12-02989 (in press).

Nilsen, T.O., Ebbesson, L.O.E., Handeland, S.O., Kroglund, K., Finstad, B., Angotzi, A.R., Stefansson, S.O. (2013) Atlantic salmon (Salmo salar L.) smolts require more than two weeks to recover from acidic water and aluminium exposure. Aquatic Toxicology 142-143, 33-34.

Salvanes, A.G.V., Moberg, O., Ebbesson, L.O.E., Nilsen, T.O., Jensen, K.H., Skorping, A., Braithwaite, V.A. (2013). Environmental enrichment promotes neural plasticity and cognitive ability in fish. Proceedings of the Royal Society B 280: 20131331. http://dx.doi.org/10.1098/rspb.2013.1331.

Grassie, C., Braithwaite, V.A., Nilsson, J., Nilsen, T.O., Teien, H.C., Handeland, S.O., Stefansson, S.O., Tronci, V., Ebbesson, L.O.E. (2012). Aluminum exposure impacts brain plasticity and behavior in Atlantic salmon (Salmo salar). Journal of Experimental Biology 216, 3148-3155.

Angotzi, A.R., Stefansson, S.O., Nilsen, T.O., Rathore, R.M., 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. General and comparative endocrinology 187, 48-59.

Urke, H.A., Kristensen, T., Arnekleiv, J.V., Haugen, T.O., Kjærstad, G., Stefansson, S.O., Ebbesson, L.O.E., Nilsen, T.O., (2013). Sea water tolerance and post smolt migration of wild Atlantic salmon Salmo salar x brown trout S. trutta hybrid smolts. Journal of Fish Biology 82, 206-227.

Handeland, S.O., Imsland, A., Ebbesson, L.O.E., Nilsen, T.O., Hosfeld, C.D., Baeverfjord, G., Espmark, Å., Rosten, T., Skilbrei, O., Hansen, T., Gunnarsson, G.S., Breck, O., Stefansson, S.O., (2013). Low light intensity can reduce Atlantic salmon smolt quality. Aquaculture 384-387, 19-24.

Urke, H.A., Kristensen, T., Arnekleiv, J.V., Haugen, T.O., Kjærstad, G., Stefansson, S.O., Ebbesson, L.O.E., Nilsen, T.O. (2013). Sea water tolerance and post smolt migration of wild Atlantic salmon x brown trout hybrid smolts. Journal of Fish Biology 82, 206-227.

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.

Kroglund, K., Finstad, B., Pettersen, K., Teien, H.C., Salbu, B., Rosseland, 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 smolt following aluminum exposure defined by changes in blood physiology and seawater tolerance. Aquaculture 362-363, 232-240.

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.

Kling, P., Bergman, E.J., Nilsen, T.O., Einarsdottir, I.E., Rønnestad, I., Stefansson, S.O., Björnsson, B.Th. (2012). The role of growth hormone in growth, lipid homeostasis, energy utilization and partitioning in rainbow trout: interactions with insulin-like growth factor I, ghrelin and leptin. General and comparative endocrinology 175, 153-162.

Ebbesson, L.O.E., Nilsen, T.O., Helvik, J.V., Tronci, V., Stefansson, S.O. (2011). Corticotropin-releasing factor neurogenesis during midlife development in salmon: genetic, environment and thyroid hormone regulation. Journal of Neuroendocrinology 23, 733-741.

Murashita, K., Jordal, A. E. O., Nilsen, T.O., Stefansson, S.O., Kurokawa, T., Björnsson, B.Th., Gamst-Moen, A.G., Rønnestad, I., (2010). Leptin reduces Atlantic salmon growth through the central pro-opiomelanocortin pathway. Comparative Biochemistry and physiology Part A 158, 79-86.

Nilsen, T.O., Ebbesson, L.O.E., Kverneland, O.G., Kroglund, F. Finstad, B., 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 Toxicology 97, 250-259.

Rønnestad, I., Nilsen, T.O., Murashita, K., Angotzi, A.R., Gamst Moen, A.G., Stefansson, S.O., Björnsson, B.Th., Kling, P., Kurokawa, T., (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 168, 55-70.

Murashita, K., Kurokawa, T., Nilsen, T.O., Rønnestad, I., (2009). Ghrelin, cholecystokinin and peptide YY in Atlantic salmon (Salmo salar): molecular cloning and tissue expression. General and comparative endocrinology 160, 223-235.

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

Tipsmark, C.K., Kiilerich, P., Nilsen, T.O., Ebbesson, L.O.E., Stefansson, S.O., 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.

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

Stefansson, S.O, Nilsen, T.O., Ebbesson, L.O.E., Wargelius, A., Madsen, S.S., Björnsson, B.Th., 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., Holmqvist, B., (2007). Exposure to continuous light disrupts retinal innervation of the preoptic nucleus during parr-smolt transformation in salmon. Aquaculture 273, 345-349.

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

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

Rønnestad, I., Gavaia, P.J., Viegas, C.S.B., Verri, T., Romano, A., Nilsen, T.O., Jordal, A.J., Kamisaka, Y., Cancela, M.L., (2007). Oligopeptide transporter PepT1 in Atlantic cod (Gadus morhua L.): cloning, tissue expression and comparative aspects. The Journal of Experimental Biology 210, 3883-3896.

Ebbesson, L.O.E., Tipsmark, C.K., Holmqvist, B., Nilsen, T.O., Andersson, E., Stefansson, S.O., Madsen, S.S., (2005). Nitric oxide producing cells in the gill of Atlantic salmon and their inhibition of Na+,K+-ATPase activity. The Journal of Experimental Biology 208, 1011-1017.

Olsvik, P. A., Lie, K. K., Jordal, A. E. O., Nilsen, T.O., Hordvik, I., (2005). Evaluation of potential reference genes in real-time RT-PCR studies of Atlantic salmon. Bmc Molecular Biology 6:21, 1-9.

Nilsen, T.O., Ebbesson, L.O.E., Stefansson, S. O., 2003. Smolting in anadromous and landlocked strains of Atlantic salmon (Salmo salar). Aquaculture 222, 71-82.

Book Chapter

Stefansson, S.O., Bjerknes, V., Bjørn, P.A., Bæverfjord, G., Finn, R.N., Finstad, B., Fivelstad, S., Handeland, S.O., Hosfeld, C.D., Kristensen, T., Kroglund, K., Nilsen, T.O., Rosseland, B.O., Rosten, T., Salbu, B., Teien, H.C., Toften, H., Åtland, Å. (2007). Fysiologiske egenskaper ved rogn, yngel og smolt. In: Bjerknes, V. (ed), Vannkvalitet og smoltproduksjon: Juul forlag 2007. ISBN 978-82-8090-018-0. s. 94-123. (In Norwegian).

Publications in popular Science Journals

Nilsen, T.O., Ebbesson, L.O.E., Kverneland, O.G., Kroglund, F., Finstad, B., Stefansson, S.O. (2010). Ny metode kan påvise skader hos laksesmolt som er utsatt for aluminiumsrikt surt vann. pH-status nr. 4, 12-13 (in norwegian)

Kroglund F., Finstad, B., Pettersen, K., Rosseland, B.O., Bjørn, P.A., Teien, T.C., Salbu, B., Nilsen, T.O., Stefansson, T.O., Ebbesson, L.O., Nilsen, R., Kristiansen, T., (2010) Forsurigsskader og helbredningstid for laksesmolt. pH-status nr.1, 6-7 (in Norwegian)

Stefansson, S.O. and Nilsen, T.O. (2012). The smolt probe – novel tools for assessment of smolt quality and marine performance in Atlantic salmon. Public Service Review: European Union, 23, page 472.

 

Education:

2007 Ph.D. University of Bergen, Department of Biology. Thesis title “Molecular and endocrine aspects of hypo-osmoregulatory development in Atlantic salmon (Salmo salar L.),” ISBN 978-82-308-0456-8.

2002 Cand. Cient., (M.Sc.), University of Bergen, Department of Fisheries and Marine Biology

1999 Høyskolekandidat (B.Sc.) in aquaculture biology, Sogndal College

Professional Experience:

University of Bergen, Dept. of Biology, Research Scientist, 2010 - present

Conte Anadromous Fish Research Center, USGS, Biological Resources Division, Turners Falls, MA, USA, Postdoctoral Fellow (with Stephen D. McCormick, 15 months), 2008 – 2009

University of Bergen, Dept. of Biology, Postdoctoral Fellow, 2007 – 2009