Even Jørgensen
Stillingsbeskrivelse
Research and teaching
Research: Fish physiology and aquaculture
Teaching: Bio-3528, Bio-3503, Bio-2504, Bio-2310
Pasqualina Gaetano,
Vilma Duarte,
Anja Striberny,
David Hazlerigg,
Even Hjalmar Jørgensen,
Marco A. Campinho
m.fl.:
Photoperiod and dietary treatment in freshwater modulate the short-term intestinal response to seawater in Atlantic salmon (Salmo salar)
Vilma Duarte,
Pasqualina Gaetano,
Anja Striberny,
David Hazlerigg,
Even Hjalmar Jørgensen,
Juan Fuentes
m.fl.:
Modulation of intestinal growth and differentiation by photoperiod and dietary treatment during smoltification in Atlantic salmon (Salmo salar, L.)
Alexander Christopher West,
Yasutaka Mizoro,
Shona Wood,
Louise M. Ince,
Marianne Iversen,
Even Hjalmar Jørgensen
m.fl.:
Immunologic Profiling of the Atlantic Salmon Gill by Single Nuclei Transcriptomics
Marianne Iversen,
Teshome Dagne Mulugeta,
Alexander Christopher West,
Even Hjalmar Jørgensen,
Samuel A. M. Martin,
Simen Rød Sandve
m.fl.:
Photoperiod-dependent developmental reprogramming of the transcriptional response to seawater entry in Atlantic salmon (Salmo salar)
Anja Striberny,
Daniel Lauritzen,
Juan Fuentes,
Marco A. Campinho,
Gaetano Pasqualina,
Vilma Duarte
m.fl.:
More than one way to smoltify a salmon? Effects of dietary and light treatment on smolt development and seawater growth performance in Atlantic salmon
Aquaculture 2021 DOI
Marianne Iversen,
Teshome Dagne Mulugeta,
Børge Gellein Blikeng,
Alexander Christopher West,
Even Hjalmar Jørgensen,
Simen Rød Sandve
m.fl.:
RNA profiling identifies novel, photoperiodhistory dependent markers associated with enhanced saltwater performance in juvenile Atlantic salmon
Alexander Christopher West,
Yasutaka Mizoro,
Shona Hiedi Wood,
Marianne Iversen,
Louise Ince,
Even Jørgensen
m.fl.:
A single nuclei transcriptomic analysis of the Atlantic salmon gill through smoltification and seawater transfer
bioRxiv 2020 DOI
Alexander Christopher West,
Marianne Iversen,
Even Hjalmar Jørgensen,
Simen Rød Sandve,
David Hazlerigg,
Shona Hiedi Wood
:
Diversified regulation of circadian clock gene expression following whole genome duplication
Madison M. Bradley,
Megan Perra,
Øystein Ahlstrøm,
Bjørn Munro Jenssen,
Even Hjalmar Jørgensen,
Eva Fuglei
m.fl.:
Mandibular shape in farmed Arctic foxes (Vulpes lagopus) exposed to persistent organic pollutants
Anja Striberny,
Even Hjalmar Jørgensen,
Christophe Klopp,
Elodie Magnanou
:
Arctic charr brain transcriptome strongly affected by seasonal summer growth, but only subtly by feed deprivation.
Jo Espen Tau Strand,
David Hazlerigg,
Even Hjalmar Jørgensen
:
Photoperiod revisited: is there a critical day length for triggering a complete
parr–smolt transformation in Atlantic salmon Salmo salar?
Patric Gauthier,
Anita Evenset,
Guttorm N. Christiansen,
Even Hjalmar Jørgensen,
Mathilakath M Vijayan
:
Lifelong Exposure to PCBs in the Remote Norwegian Arctic Disrupts the Plasma Stress Metabolome in Arctic Charr
Environmental Science and Technology 2018 DOI
Anju M Philip,
Even Hjalmar Jørgensen,
Alec G Maule,
Mathilakath M Vijayan
:
Extended fasting does not affect the liver innate immune response in rainbow trout
Developmental and Comparative Immunology 2018 DOI
Even Hjalmar Jørgensen,
Ada Christine Haatuft,
Velmurugu Puvanendran,
Atle Mortensen
:
Effects of reduced water exchange rate and oxygen saturation on growth and stress indicators of juvenile lumpfish (Cyclopterus lumpus L.) in aquaculture
Aquaculture 2017 DOI
Christian Sonne,
Peter A Torjesen,
Eva Fuglei,
Derek C. G. Muir,
Bjørn Munro Jenssen,
Even Hjalmar Jørgensen
m.fl.:
Exposure to Persistent Organic Pollutants Reduces Testosterone Concentrations and Affects Sperm Viability and Morphology during the Mating Peak Period in a Controlled Experiment on Farmed Arctic Foxes (Vulpes lagopus)
Even Hjalmar Jørgensen,
Alec G Maule,
Anita Evenset,
Guttorm Christensen,
Jenny Bytningsvik,
Marianne Frantzen
m.fl.:
Biomarker response and hypothalamus-pituitary-interrenal axis functioning in Arctic charr from Bjørnøya (74°30′ N), Norway, with high levels of organohalogenated compounds
Aquatic Toxicology 2017 DOI
Anja Striberny,
Even Hjalmar Jørgensen
:
Feedback from Arctic charr: Feed flavour stimulation and re-feeding after feed deprivation stimulate genes encoding both orexigenic and anorexigenic neuropeptides
General and Comparative Endocrinology 2017 DOI
Hooman Moghadam,
Hanne Johnsen,
Nick Robinson,
Øivind Andersen,
Even Hjalmar Jørgensen,
Helge K. Johnsen
m.fl.:
Impacts of Early Life Stress on the Methylome and Transcriptome of Atlantic Salmon
Tonje W. Rogstad,
Christian Sonne,
Gro Dehli Villanger,
Øystein Ahlstrøm,
Eva Fuglei,
Derek C.G. Muir
m.fl.:
Concentrations of vitamin A, E, thyroid and testosterone hormones in blood plasma and tissues from emaciated adult male Arctic foxes (Vulpes lagopus) dietary exposed to persistent organic pollutants (POPs)
Marlene Lorgan,
Even Hjalmar Jørgensen,
William C. Jordan,
Samuel AM Martin,
David Hazlerigg
:
NFAT5 genes are part of the osmotic regulatory system in Atlantic salmon (Salmo salar)
Even Hjalmar Jørgensen,
Nicholas J Bernier,
Alec G Maule,
Mathilakath M Vijayan
:
Effect of long-term fasting and a subsequent meal on mRNA abundances of hypothalamic appetite regulators, central and peripheral leptin expression and plasma leptin levels in rainbow trout
Peptides 2016 DOI
Elodie Magnanou,
Celine Noirot,
Jack Falcòn,
Even Hjalmar Jørgensen
:
Sequencing and characterization of a multi-organ Arctic charr transcriptome: A toolbox for investigating polymorphism and seasonal life in a high Arctic fish
Marine Genomics 2016 DOI
Marlene Lorgen,
Elisa Casadei,
Elżbieta Król,
Alex Douglas,
Mike J. Birnie,
Lars O.E. Ebbesson
m.fl.:
Functional divergence of type 2 deiodinase paralogs in the Atlantic salmon
Current Biology 2015 DOI
Anja Striberny,
Chandra Sekhar Ravuri,
Malcolm Jobling,
Even Hjalmar Jørgensen
:
Seasonal differences in relative gene expression of putative central appetite regulators in arctic charr (Salvelinus alpinus) do not reflect its annual feeding cycle
Jack Falcòn,
Steven L Coon,
Laurence Besseau,
Damien Cazamea-Catalan,
Nichael Fuentes,
Elodie Magnanou
m.fl.:
Drastic neofunctionalization associated with evolution of the timezyme AANAT 500 Mya
Proceedings of the National Academy of Sciences of the United States of America (PNAS) 2014 DOI
Even Hjalmar Jørgensen,
Helge K. Johnsen
:
Rhythmic life of the Arctic charr: Adaptations to life at the edge
Marine Genomics 2014 DOI
Anju M Philip,
Even Hjalmar Jørgensen,
Alec G. Maule,
Mathilakath M Vijayan
:
Tissue-specific molecular immune response to lipopolysaccharide challenge in emaciated anadromous Arctic charr
Developmental and Comparative Immunology 2014 DOI
Lisa Bjørnsdatter Helgason,
Hans Wolkers,
Eva Fuglei,
Øystein Jan Ahlstrøm,
Derek C. G. Muir,
Even Hjalmar Jørgensen
:
Seasonal emaciation causes tissue redistribution and an increased potential for toxicity of lipophilic pollutants in farmed arctic fox (Vulpes lagopus)
Environmental Toxicology and Chemistry 2013 DOI
Even Hjalmar Jørgensen,
Mads Martinsen,
Vidar Strøm,
Kristin Elisa Ruud Hansen,
Chandra Sekhar Ravuri,
Ningping Gong
m.fl.:
Long-term fasting in the anadromous Arctic charr is associated with downregulation of metabolic enzyme activity and upregulation of leptin A1 and SOCS expression in the liver
Journal of Experimental Biology 2013 DOI
D. Cazamea-Catalan,
E. Magnanou,
Ronny Helland,
L. Besseau,
Gilles Boeuf,
Jack Falcòn
m.fl.:
Unique arylalkylamine N-acetyltransferase-2 polymorphism in salmonids and profound variations in thermal stability and catalytic efficiency conferred by two residues
Journal of Experimental Biology 2013 DOI
Eirik Frøiland,
Malcolm Jobling,
Björn Thrandur Björnsson,
Peter Kling,
Chandra Sekhar Ravuri,
Even Hjalmar Jørgensen
:
Seasonal appetite regulation in the anadromous Arctic charr: Evidence for a role of adiposity in the regulation of appetite but not for leptin in signalling adiposity
General and Comparative Endocrinology 2012 DOI
Damien D. Cazamèa-Catalan,
Elodie Magnanou,
Ronny Helland,
Gilmer Vanegas,
Laurence Besseau,
Gilles Boeuf
m.fl.:
Functional diversity of Teleost arylalkylamine N-acetyltransferase-2: is the timezyme evolution driven by habitat temperature?
Molecular Ecology 2012 DOI
Ingeborg G. Hallanger,
Even Hjalmar Jørgensen,
Eva Fuglei,
Øystein Jan Ahlstrøm,
Derek C G Muir,
Bjørn Munro Jenssen
:
Dietary Contaminant Exposure Affects Plasma Testosterone, but not Thyroid Hormones, Vitamin A, and Vitamin E, in Male Juvenile Arctic Foxes (Vulpes lagopus)
Journal of Toxicology and Environmental Health, Part A 2012 DOI
Jo Espen Tau Strand,
Jan Grimsrud Davidsen,
Even Hjalmar Jørgensen,
Audun Rikardsen
:
Seaward migrating Atlantic salmon smolts with low levels of gill Na+, K+ -ATPase activity; is sea entry delayed?
Steve Wiseman,
Even Hjalmar Jørgensen,
Alec G. Maule,
Mathilakath M Vijayan
:
Contaminant loading in remote Arctic lakes affects cellular stress-related proteins expression in feral charr
Polar Biology 2011 DOI
Eirik Frøiland,
Koji Murashita,
Even Hjalmar Jørgensen,
Tadahide Kurokawa
:
Leptin and ghrelin in anadromous Arctic charr: Cloning and change in expressions during a seasonal feeding cycle
General and Comparative Endocrinology 2010 DOI
Robert J. Letcher,
Jan Ove Bustnes,
Rune Dietz,
Bjørn Munro Jenssen,
Even Hjalmar Jørgensen,
Christian Sonne
m.fl.:
Exposure and effects assessment of persistent organohalogen contaminants in arctic wildlife and fish
Science of the Total Environment 2010 DOI
Lisa Bjørnsdatter Helgason,
Augustine Arukwe,
Geir W. Gabrielsen,
Mikael Harju,
Marit Nøst Hegseth,
Eldbjørg Sofie Heimstad
m.fl.:
Biotransformation of PCBs in Arctic seabirds: Characterization of phase I and II pathways at transcriptional, translational and activity levels
Comparative Biochemistry and Physiology - Part C: Toxicology & Pharmacology 2010 DOI
Jo J Aarseth,
Eirik Frøiland,
Even Hjalmar Jørgensen
:
Melatonin implantation during spring and summer does not affect the seasonal rhythm of feeding in anadromous Arctic charr (Salvelinus alpinus)
Polar Biology 2010 DOI
Christian Sonne,
Hans Wolkers,
Pall S Leifsson,
Tine Iburg,
Bjørn Munro Jenssen,
Eva Fuglei
m.fl.:
Chronic dietary exposure to environmental organochlorine contaminants induces thyroid gland lesions in Arctic foxes (Vulpes lagopus)
Environmental Research 2009 DOI
Daisuke Ojima,
Roger Johan Pettersen,
Judith Wolkers,
Helge K. Johnsen,
Even Hjalmar Jørgensen
:
Growth hormone and cortisol treatment stimulate seawater tolerance in both anadromous and landlocked Arctic charr
Comparative Biochemistry and Physiology A 2009 DOI
Christian Sonne,
Hans Wolkers,
Frank F Riget,
JEB Jensen,
Jens-Erik Beck Jensen,
Jenni Teilmann
m.fl.:
Mineral density and biomechanical properties of bone tissue from male Arctic foxes (Vulpes lagopus) exposed to organochlorine contaminants and emaciation
Comparative Biochemistry and Physiology - Part C: Toxicology & Pharmacology 2009 DOI
Jo J Aarseth,
Eirik Frøiland,
Even Hjalmar Jørgensen
:
Melatonin implantation during spring and summer does not affect the seasonal rhythm of feeding in anadromous Arctic charr (Salvelinus alpinus)
Polar Biology 2009 DOI
Natacha Ann Lays,
Maren Marie Thode Iversen,
Marianne Frantzen,
Even Hjalmar Jørgensen
:
Physiological stress responses in spotted wolffish (Anarhichas minor) subjected to acute disturbance and progressive hypoxia
Aquaculture 2009 DOI
Lars Bottengård,
Even Hjalmar Jørgensen
:
Elevated spring temperature stimulates growth, but not smolt development, in anadromous Arctic charr
Comparative Biochemistry and Physiology A 2008 DOI
Jo Espen Tau Strand,
Jo Jorem Aarseth,
Tanja Lexau Hanebrekke,
Even Hjalmar Jørgensen
:
Keeping track of time under ice and snow in a sub-arctic lake: plasma melatonin rhythms in Arctic charr overwintering under natural conditions
Journal of Pineal Research 2008 DOI
Hanne Johnsen,
Hooman Moghadam,
Nicholas Andrew Robinson,
Øivind Andersen,
Even Hjalmar Jørgensen,
Helge K. Johnsen
m.fl.:
Stimulering av stressrespons i tidlige livsstadier hos laks har positiv effekt på vekst senere i livet
2018
Hanne Johnsen,
Hooman Moghadam,
Nick Robinson,
Øivind Andersen,
Even Hjalmar Jørgensen,
Helge K. Johnsen
m.fl.:
IMPACTS OF EARLY LIFE STRESS ON THE METHYLOME AND TRANSCRIPTOME OF ATLANTIC SALMON
2017
Atle Mortensen,
Ada Haatuft,
Velmurugu Puvanendran,
Even Hjalmar Jørgensen
:
Rognkjeksoppdrettere – ikke spar på vannet!
2016
Anja Striberny,
Malcolm Jobling,
Chandra Sekhar Ravuri,
Even Hjalmar Jørgensen
:
TRACKING SEASONAL CHANGES IN CENTRAL GENE EXPRESSION OF APPETITE REGULATORS IN ANADROMOUS ARCTIC CHARR
2014
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Forskningsinteresser
Min forskningsinteresse knytter seg til de fasinerende tilpasninger som er utviklet hos fisk som lever i et barskt og skiftende miljø ved høye breddegrader. Den anadrome (sjøvandrende) livsstrategien til røye (Salvelinus alpinus) er en dominerende og høyt skattet forskningsmodell. Denne modellen brukes til å fremskaffe kunnskap om hvordan hjernen regulerer appetitt og energibalanse i en art som gjennom året veksler mellom langtids fravær av appetitt (anoreksi) gjennom vinteren i ferskvann og intens spiseaktivitet gjennom det korte sjøvannsoppholdet om sommeren. Videre er det et fokus på hvordan hormonelle akser som regulerer smoltifisering (forberedelse til opphold i sjøen) og stress integrerer med de mekanismene som regulerer appetitt, siden disse mekanismene sammenfaller i tid. Sist, men ikke minst, er det viktig å skaffe tilveie kunnskap om hvordan sesongmessige prosesser som for eksempel smoltifisering “times” til den riktige tid på året. Studier gjennomføres både i felt og under kontrollerte betingelser i lab. Selv om mye av denne forskningen kan betegnes som grunnforskning, er det også klart at resultatene vil ha betydning både for fremtidig forvaltning av nordlige fiskebestander og for oppdrett av slike arter.