Head supervisor: BIO370 Cell- and developmental biology; MAR350 Advanced aquaculture

Academic article

• Jon Vidar Helvik; P. R. Flood; Bernt T. Walther et al. (1991). Morphogenesis of the hatching gland of Atlantic halibut (Hippoglossus hippoglossus). (external link)
• Jon Vidar Helvik; Øyvind Drivenes; Tore Næss et al. (2001). Molecular cloning and characterisation of five opsin genes from the marine flatfish Atlantic halibut (Hippoglossus hippoglossus). (external link)
• Jon Vidar Helvik; Øyvind Drivenes; Torstein Habroe et al. (2001). Topography of different photoreceptor cell types in the larval retina of Atlantic halibut (Hippoglossus hippoglossus). (external link)
• Xiaofeng Zhao; Anders Fjose; Natalia Larsen et al. (2008). Treatment with small interfering RNA affects the microRNA pathway and causes unspecific defects in zebrafish embryos. (external link)
• Mariann Eilertsen; Øyvind Drivenes; Rolf Edvardsen et al. (2014). The exorhodopsin and melanopsin systems in the pineal complex and brain at early developmental stages of Atlantic halibut (Hippoglossus hippoglossus). (external link)
• Mariann Eilertsen; Ragnhild Valen; Øyvind Drivenes et al. (2018). Transient photoreception in the hindbrain is permissive to the life history transition of hatching in Atlantic halibut. (external link)
• Øivind Bergh; Geir Høvik Hansen; Anders Jelmert et al. (1990). Bakterier på kveiteegg er en viktig årsak til dødelighet. (external link)
• S. J. Hyllner; D. O. Oppen-Berntsen; Jon Vidar Helvik et al. (1991). Oestradiol -17_b induces the major vitellin envelope proteins in both sexes in teleosts. (external link)
• Ørjan Karlsen; Anne Berit Skiftesvik; Jon Vidar Helvik (1998). The effect of light on activity and growth of Atlantic halibut, Hippoglossus hippoglossus L., yolk-sac larvae. (external link)
• Charlotte M. Bolton; Michaël Bekaert; Mariann Eilertsen et al. (2021). Rhythmic Clock Gene Expression in Atlantic Salmon Parr Brain. (external link)
• Jon Vidar Helvik; D. O. Oppen-Berntsen; Bernt T. Walther (1991). The hatching mechanism in Atlantic halibut (#_H#_i#_p#_p#_o#_g#_l#_o#_s#_s#_u#_s#_ #_h#_i#_p#_p#_o#_g#_l#_o#_s#_s#_u#_s). (external link)
• Sissel Norland; Ana S. Gomes; Ivar Rønnestad et al. (2023). Light conditions during Atlantic salmon embryogenesis affect key neuropeptides in the melanocortin system during transition from endogenous to exogenous feeding. (external link)
• Y Kamisaka; Øyvind Drivenes; T Kurokawa et al. (2005). Cholecystokinin mRNA in Atlantic herring, Clupea harengus - molecular cloning, characterization, and distribution in the digestive tract during the early life stages. (external link)
• Harald Kryvi; Kari Nordvik; Per Gunnar Fjelldal et al. (2020). Heads and tails: The notochord develops differently in the cranium and caudal fin of Atlantic Salmon (Salmo salar, L.). (external link)
• Lars O.E. Ebbesson; Tom Ole Nilsen; Jon Vidar Helvik et al. (2011). Corticotropin-Releasing Factor Neurogenesis during Midlife Development in Salmon: Genetic, Environmental and Thyroid Hormone Regulation. (external link)
• A. M. Kvenseth; Karin Pittman; Jon Vidar Helvik (1994). Når kan kveitelarven se? - en brikke i puslespillet omkring startforing av kveite. (external link)
• Finn Arne Weltzien; Birgitta Nordberg; Jon Vidar Helvik et al. (2003). Identification and localization of eight distinct hormone-producing cell types in the pituitary of male Atlantic halibut (Hippoglossus hippoglossus L.). (external link)
• D. O. Oppen-Berntsen; S. J. Hyllner; C. Haux et al. (1992). Eggshell zona radiat-proteins: Extra-ovarian origin and induction by estradiol-17_b. (external link)
• S. J. Hyllner; D. O. Oppen-Berntsen; Jon Vidar Helvik et al. (1991). Oestradiol 17_b induces the major vitelline envelope proteins in both sexes in teleosts. (external link)
• Mariann Eilertsen; Benjamin G.J. Clokie; Lars Ebbesson et al. (2021). Neural activation in photosensitive brain regions of Atlantic salmon (Salmo salar) after light stimulation. (external link)
• Verena Hoppmann; Jun J. Wu; Anne Mette Søviknes et al. (2008). Expression of the eight AMPA receptor subunit genes in the developing central nervous system and sensory organs of zebrafish. (external link)
• Mariann Eilertsen; Wayne I. L. Davies; Dharmeshkumar Patel et al. (2022). An EvoDevo Study of Salmonid Visual Opsin Dynamics and Photopigment Spectral Sensitivity. (external link)
• Fekadu Yadetie; Xiaokang Zhang; Anna Reboa et al. (2024). Transcriptome analysis reveals effects of ethynylestradiol and bisphenol A on multiple endocrine and metabolic pathways in the pituitary and liver of female Atlantic cod (Gadus morhua). (external link)
• Yuko Kamisaka; Jon Vidar Helvik; Masatomo Tagawa et al. (2013). Evidence for an ontogenetic change from pre-programmed to meal-responsive cck production in Atlantic herring, Clupea harengus L. (external link)
• Finn-Arne Weltzien; Øivind Andersen; Birgitta Norberg et al. (2003). Identification and localization of eight distinct hormone-producing cell types in the pituitary of male Atlantic halibut (hippoglossus hippoglossus). (external link)
• Mariann Eilertsen; Sissel Norland; David William Peter Dolan et al. (2024). Onset of circadian rhythmicity in the brain of Atlantic salmon is linked to exogenous feeding. (external link)
• Jon Vidar Helvik; Ørjan Karlsen (1996). The effect of light- and dark-rearing on the development of the eyes of Atlantic halibut (Hippoglossus hippoglossus) yolk sac larvae. (external link)
• Øyvind Drivenes; Anne Mette Søviknes; Lars O. E. Ebbesson et al. (2003). Isolation and characterization of two teleost melanopsin genes and their differential expression within the inner retina and brain. (external link)
• Jon Vidar Helvik; Bernt T. Walther (1992). Photo-regulation of the hatching process in halibut (Hippoglossus hippoglossus) eggs. (external link)
• Fanny Busserolles de; Fabio Cortesi; Jon Vidar Helvik et al. (2017). Pushing the limits of photoreception in twilight conditions: The rod-like cone retina of the deep-sea pearlsides. (external link)
• Jon Vidar Helvik; Eyvind Rødahl; Øyvind Drivenes et al. (2009). Identification and Characterization of Two Zebrafish Nectin-1 Genes That Are Differentially Expressed in the Developing Eye and Brain. (external link)
• Marius Karlsen; Are Nylund; Kuninori Watanabe et al. (2008). Characterization of 'Candidatus Clavochlamydia salmonicola': an intracellular bacterium infecting salmonid fish. (external link)
• Christine Horne; Jon Vidar Helvik; Mitchell Stewart Fleming et al. (2022). Mapping the pattern of essential neuroendocrine cells related to puberty and VA opsin expression provides further insight in the photoreceptive regulation of the BPG axis in Atlantic salmon (Salmo salar). (external link)
• Yuko Kamisaka; Øyvind Drivenes; Tadahide Kurokawa et al. (2005). Cholecystokinin mRNA in Atlantic herring, Clupea harengus—molecular cloning, characterization, and distribution in the digestive tract during the early life stages. (external link)
• Jon Vidar Helvik; D. O. Oppen-Berntsen; Bernt T. Walther (1991). The hatching mechanism in Atlantic halibut (Hippoglossus hippoglossus). (external link)
• Ragnhild Valen; Rita Karlsen; Jon Vidar Helvik (2018). Environmental, population and life-stage plasticity in the visual system of Atlantic cod. (external link)
• W. TED ALLISON,; STEPHEN G DANN; Jon Vidar Helvik et al. (2003). Ontogeny of Ultraviolet-Sensitive Cones in the Retina of Rainbow Trout (Oncorhynchus mykiss). (external link)
• Mari Sandbakken; Lars O.E. Ebbesson; Sigurd Olav Stefansson et al. (2012). Isolation and characterization of melanopsin photoreceptors of atlantic salmon (Salmo salar). (external link)
• Jon Vidar Helvik; Bernt T. Walther (1993). Development of hatchability in halibut (Hippoglossus hippoglossus) embryos. (external link)
• Mariann Eilertsen; David William Peter Dolan; Charlotte M. Bolton et al. (2022). Photoreception and transcriptomic response to light during early development of a teleost with a life cycle tightly controlled by seasonal changes in photoperiod. (external link)
• Jon Vidar Helvik; D. O. Oppen-Berntsen; P. R. Flood et al. (1991). Morphogenesis of the hatching gland of Atlantic halibut (Hippoglossus hippoglossus). (external link)
• Ragnhild Valen; Mariann Eilertsen; Rolf Edvardsen et al. (2016). The two-step development of a duplex retina involves distinct events of cone and rod neurogenesis and differentiation. (external link)
• Sissel Norland; Mariann Eilertsen; Ivar Rønnestad et al. (2023). Mapping key neuropeptides involved in the melanocortin system in Atlantic salmon (Salmo salar) brain. (external link)
• Ragnhild Valen; Rolf Edvardsen; Anne Mette Søviknes et al. (2014). Molecular evidence that only two opsin subfamilies, the blue light- (SWS2) and green light-sensitive (RH2), drive color vision in Atlantic cod (Gadus morhua).. (external link)

Conference lecture

• Mariann Eilertsen; David William Peter Dolan; Charlotte M. Bolton et al. (2020). The effect of light environment on transcriptome and early development in Atlantic salmon. (external link)
• Jon Vidar Helvik (2024). Nonvisual photoreception, the link between light environment and biological processes in Atlantic salmon a species with life history transitions programmed to seasonal changes. (external link)
• Jon Vidar Helvik (2024). Photoreception in teleosts and adaption of the visual system in the marine environment. (external link)
• Øyvind Drivenes; Anne Mette Søviknes; Lars O. E. Ebbesson et al. (2002). Visual and non-visual reception in marine fish larvae. (external link)
• Sissel Norland; Ivar Rønnestad; Mariann Eilertsen et al. (2022). Topology of the Central Melanocortin Neuropeptides in the Atlantic Salmon Parr Brain. (external link)
• Mariann Eilertsen; Sissel Norland; David William Peter Dolan et al. (2024). Onset of circadian rhythmicity in the brain of Atlantic salmon is linked to exogenous feeding. (external link)
• Jon Vidar Helvik; Anne Mette Søviknes; Øyvind Drivenes (2002). The developing visual system and metamorphosis in flatfish. (external link)
• Mariann Eilertsen; David William Peter Dolan; Charlotte M. Bolton et al. (2022). Photoreception and transcriptome response to light during early development of Atlantic salmon (Salmon salar). (external link)
• Marnix Gorissen; Tom Ole Nilsen; Einar Bye-Ingebrigtsen et al. (2014). EXPLORING PHYSIOLOGICAL FUNCTIONS OF THE PLEIOTROPHIC MELANOCORTIN ALPHA-MSH IN ATLANTIC SALMON. (external link)
• Anne Mette Kvenseth; Karin Pittman; Jon Vidar Helvik (1993). The development of the halibut eye. (external link)
• Sissel Norland; Ana S. Gomes; Ivar Rønnestad et al. (2023). Effekt av lys på appetittkontroll under startfôring hos Atlantisk laks. (external link)
• Mariann Eilertsen; David William Peter Dolan; Charlotte M. Bolton et al. (2019). Genomic approach to identify nonvisual photoreceptors in Atlantic salmon and effects of light environment on early development. (external link)
• Mariann Eilertsen; Rita Karlsen; Harald Sveier et al. (2018). The effect of narrow banded LED light on development and growth performance. (external link)
• Jon Vidar Helvik; Anne Mette Søviknes; Øyvind Drivenes (2002). Topographic specialisation of photoreceptor cells within retina of marine fish larvae. (external link)
• Christine Horne; Mariann Eilertsen; Elsa Denker et al. (2024). The photoreceptive pineal organ of the Atlantic salmon. (external link)
• Christine Horne; Jon Vidar Helvik; Elsa Denker et al. (2024). The complexity of opsins in the melatonin producing pineal organ of Atlantic salmon. (external link)

Conference poster

• Anne Mette Søviknes; Øyvind Drivenes; Jun J. Wu et al. (2002). Molecular cloning and characterisation of ultraviolet-sensitive opsin promoter from turbot. (external link)
• Sissel Norland; Mariann Eilertsen; Ana S. Gomes et al. (2024). Development of appetite and rhythmicity in Atlantic salmon during the transition from endogenous to exogenous feeding​. (external link)
• Christine Horne; Mariann Eilertsen; Elsa Denker et al. (2024). The photoreceptive and melatonin producing pineal organ of Atlantic salmon. (external link)
• Øyvind Drivenes; Anne Mette Søviknes; Lars O. E. Ebbesson et al. (2002). A dual non-visual photoreception system consisting of two melanopsins found in teleosts. (external link)
• María Jesús Doldán Dans; Bo Holmqvist; Benjamín Prego Martinez et al. (2001). Differentiation of serotonergic circuits in the brain of the turbot (Psetta maxima). (external link)
• Mariann Eilertsen; David William Peter Dolan; Rita Karlsen et al. (2025). The dynamics of the photoreceptive system of Atlantic salmon through the life history transition of smoltification. (external link)
• Øyvind Drivenes; Anne Mette Søviknes; Hee-Chan Seo et al. (2001). A novel nonvisual pigment gene cloned from teleost retina. (external link)
• Mariann Eilertsen; Jon Vidar Helvik (2016). The effect of narrow banded LED light on development and growth performance. (external link)
• Jon Vidar Helvik; Lars Ebbesson; Marianne Eilertsen et al. (2004). Early expression of VA opsin in Atlantic halibut. (external link)
• Mariann Eilertsen; Sissel Norland; David William Peter Dolan et al. (2024). Onset of circadian rhythmicity in the brain of Atlantic salmon is linked to exogenous feeding. (external link)

Doctoral thesis (PhD)

• Ragnhild Valen; Jon Vidar Helvik (2016). Visual photoreception in Atlantic cod (Gadus morhua) – Genomic restrictions, neurogenesis and life history transformation. (external link)
• Rasmus Skern; Frank Nilsen; Jon Vidar Helvik et al. (2005). Trypsin and trypsin-like peptidases from Lepeophtheirus salmonis. Functional implications from molecular studies. (external link)
• Jon Vidar Helvik (1992). Biology of hatching : mechanism and control of hatching in eggs of halibut (Hippoglossus hippoglossus). (external link)

Research report

• Christoffer Schander; Jon Vidar Helvik; Louise Lindblom et al. (2007). Biology Education at University of Bergen Part I. A Background Document. (external link)
• Arild Folkvord; Geir Blom; Jon Vidar Helvik et al. (1998). Teori- og eksperimentbasert studie av rekruttering hos marin fisk. Sluttrapport for del I av Strategisk Program. (external link)

Popular science article

• Tom Ole Nilsen; Juliane Lukas; Ragnhild Valen et al. (2015). Utvikling av osmoreguleringssystemet hos torskelarver startfôret på rotatorier eller naturlig zooplankton. (external link)

See a complete overview of publications in Cristin.

Helvik JV, Rødahl E, Drivenes, O and Haarr L  (2009)  Identification and Characterization of Two Zebrafish Nectin-1 Genes That Are Differentially Expressed in the Developing Eye and Brain Developmental dynamics 238(1): 43-55

 

Xiao-Feng Z, Fjose A, Larsen N, Helvik JV and Drivenes O (2008) Treatment with small interfering RNA affects the microRNA pathway and causes unspecific defects in zebrafish embryos FEBS Journal 275(9) 2177-2184

 

Hoppmann V, Wu JJ, Søviknes AM, Helvik JV, and Becker, TS. (2008). Expression of the eight AMPA Receptor Subunit Genes in the Developing Central Nervous System and Sensory Organs of Zebrafish Developmental Dynamics J237(3):788-799

 

Karlsen, M., Nylund, A., Watanabe, K., Helvik, J.V., Nylund, S. and Plarre, H. (2008) Characterization of ‘Candidatus Clavochlamydia salmonicola’: an intracellular bacterium infecting salmonid fish. Environmental Microbiology 10 (1), 208–218

 

Kamisaka, Y., Drivenes, Ø., Kurokawa, T., Tagawa, M., Rønnestad, I., Tanaka, M., and  Helvik, J.V. (2005) Cholecystokinin mRNA in Atlantic herring, Clupea harengus - molecular cloning, characterization, and distribution in the digestive tract during the early life stages PEPTIDES 26 (3): 385-393