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J. V. Helvik · SciRah

Researcher profile · Semantic Scholar

J. V. Helvik

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J. V. Helvik — researcher profile on SciRah

h-index: 23
Works: 49
Citations: 1,618

Most-cited papers

Oestradiol-17 beta induces the major vitelline envelope proteins in both sexes in teleosts.
S. Hyllner, D. O. Oppen-Berntsen, J. V. Helvik, B. Walther +1 more
1991Journal of Endocrinology137 citations
Semantic Scholar
The major structural proteins of cod (Gadus morhua) eggshells and protein crosslinking during teleost egg hardening.
D. O. Oppen-Berntsen, J. V. Helvik, B. Walther
1990Developmental Biology134 citations
Semantic Scholar
Characterization of 'Candidatus Clavochlamydia salmonicola': an intracellular bacterium infecting salmonid fish.
M. Karlsen, A. Nylund, Kuninori Watanabe, J. V. Helvik +2 more
2007Environmental Microbiology102 citations
Semantic Scholar
Modelling the influence of light, turbulence and ontogeny on ingestion rates in larval cod and herring
Ø. Fiksen, A. C. W. Utne, D. L. Aksnes, K. Eiane +2 more
1998101 citations
Semantic Scholar
Eggshell zona radiata-proteins from cod (Gadus morhua): extra-ovarian origin and induction by estradiol-17 beta.
D. O. Oppen-Berntsen, S. Hyllner, C. Haux, J. V. Helvik +1 more
1992International Journal of Developmental Biology84 citations
Semantic Scholar
Isolation and characterization of two teleost melanopsin genes and their differential expression within the inner retina and brain
O. Drivenes, Anne Mette Søviknes, L. Ebbesson, A. Fjose +2 more
2003The Journal of comparative neurology83 citations
Semantic Scholar
Eye development in Atlantic halibut (Hippoglossus hippoglossus): differentiation and development of the retina from early yolk sac stages through metamorphosis
A. M. Kvenseth, K. Pittman, J. V. Helvik
199672 citations
Semantic Scholar
Topography of different photoreceptor cell types in the larval retina of Atlantic halibut (Hippoglossus hippoglossus).
J. V. Helvik, O. Drivenes, T. Harboe, Hee-Chan Seo
2001Journal of Experimental Biology66 citations
Semantic Scholar
Identification and localization of eight distinct hormone-producing cell types in the pituitary of male Atlantic halibut (Hippoglossus hippoglossus L.).
F. Weltzien, B. Norberg, J. V. Helvik, Øivind Andersen +2 more
2003Comparative biochemistry and physiology. Part A, Molecular & integrative physiology64 citations
Semantic Scholar
Photo‐regulation of the hatching process of halibut (Hippoglossus hippoglossus) eggs
J. V. Helvik, B. Walther
199262 citations
Semantic Scholar
Pushing the limits of photoreception in twilight conditions: The rod-like cone retina of the deep-sea pearlsides
F. de Busserolles, F. Cortesi, J. V. Helvik, Wayne I. L. Davies +8 more
2017Science Advances61 citations Open access
Semantic Scholar
Molecular cloning and characterization of five opsin genes from the marine flatfish Atlantic halibut (Hippoglossus hippoglossus)
J. V. Helvik, O. Drivenes, T. Næss, A. Fjose +1 more
2001Visual Neuroscience54 citations
Semantic Scholar
Treatment with small interfering RNA affects the microRNA pathway and causes unspecific defects in zebrafish embryos
Xiao-Feng Zhao, A. Fjose, N. Larsen, J. V. Helvik +1 more
2008The FEBS Journal46 citations
Semantic Scholar
Corticotropin‐Releasing Factor Neurogenesis during Midlife Development in Salmon: Genetic, Environmental and Thyroid Hormone Regulation
L. Ebbesson, T. Nilsen, J. V. Helvik, V. Tronci +1 more
2011Journal of neuroendocrinology41 citations
Semantic Scholar
Cholecystokinin mRNA in Atlantic herring, Clupea harengus--molecular cloning, characterization, and distribution in the digestive tract during the early life stages.
Yuko Kamisaka, O. Drivenes, T. Kurokawa, M. Tagawa +3 more
2005Peptides40 citations
Semantic Scholar
Role of the pineal organ in the photoregulated hatching of the Atlantic halibut.
J. Forsell, B. Holmqvist, J. V. Helvik, P. Ekström
1997International Journal of Developmental Biology40 citations
Semantic Scholar
Expression of the eight AMPA receptor subunit genes in the developing central nervous system and sensory organs of zebrafish
Verena Hoppmann, Jun J. Wu, Anne Mette Søviknes, J. V. Helvik +1 more
2008Developmental Dynamics38 citations Open access
Semantic Scholar
Development of hatchability in halibut (Hippoglossus hippoglossus) embryos.
J. V. Helvik, B. Walther
1993International Journal of Developmental Biology35 citations
Semantic Scholar
Isolation and characterization of melanopsin photoreceptors of atlantic salmon (Salmo salar)
M. Sandbakken, L. Ebbesson, Sigurd Stefansson, J. V. Helvik
2012The Journal of comparative neurology34 citations
Semantic Scholar
Environmental parameters affecting induction of hatching in halibut (Hippoglossus hippoglossus) embryos
J. V. Helvik, B. Walther
199334 citations
Semantic Scholar
Molecular Evidence that Only Two Opsin Subfamilies, the Blue Light- (SWS2) and Green Light-Sensitive (RH2), Drive Color Vision in Atlantic Cod (Gadus morhua)
R. Valen, R. B. Edvardsen, A. M. Søviknes, O. Drivenes +1 more
2014PLoS ONE31 citations Open access
Semantic Scholar
Exorhodopsin and melanopsin systems in the pineal complex and brain at early developmental stages of Atlantic halibut (Hippoglossus hippoglossus)
M. Eilertsen, O. Drivenes, Rolf B. Edvardsen, Clarrisa A. Bradley +2 more
2014The Journal of comparative neurology25 citations Open access
Semantic Scholar
The hatching mechanism in Atlantic halibut (Hippoglossus hippoglossus).
J. V. Helvik, D. O. Oppen-Berntsen, B. Walther
1991International Journal of Developmental Biology23 citations
Semantic Scholar
Mapping key neuropeptides involved in the melanocortin system in Atlantic salmon (Salmo salar) brain
S. Norland, M. Eilertsen, I. Rønnestad, J. V. Helvik +1 more
2022The Journal of comparative neurology21 citations Open access
Semantic Scholar
Rhythmic Clock Gene Expression in Atlantic Salmon Parr Brain
C. M. Bolton, M. Bekaert, M. Eilertsen, J. V. Helvik +1 more
2021bioRxiv20 citations Open access
Semantic Scholar
The two-step development of a duplex retina involves distinct events of cone and rod neurogenesis and differentiation.
R. Valen, M. Eilertsen, R. B. Edvardsen, T. Furmanek +5 more
2016Developmental Biology19 citations Open access
Semantic Scholar
Emergence of Axonal Tracts in the Developing Brain of the Turbot (Psetta maxima)
M. Doldán, B. Prego, B. Holmqvist, J. V. Helvik +1 more
2000Brain, Behavior and Evolution18 citations
Semantic Scholar
The effect of light‐ and dark‐rearing on the development of the eyes of atlantic halibut (Hippoglossus hippoglossus) yolk‐sac larvae
J. V. Helvik, Ø. Karlsen
199618 citations
Semantic Scholar
Environmental, population and life-stage plasticity in the visual system of Atlantic cod
R. Valen, Rita Karlsen, J. V. Helvik
2018Journal of Experimental Biology16 citations Open access
Semantic Scholar
Neural activation in photosensitive brain regions of Atlantic salmon (Salmo salar) after light stimulation
M. Eilertsen, B. Clokie, L. Ebbesson, C. Tanase +2 more
2021PLoS ONE14 citations Open access
Semantic Scholar
Transient photoreception in the hindbrain is permissive to the life history transition of hatching in Atlantic halibut.
M. Eilertsen, R. Valen, O. Drivenes, L. Ebbesson +1 more
2018Developmental Biology14 citations Open access
Semantic Scholar
The effect of light on activity and growth of Atlantic halibut, Hippoglossus hippoglossus L., yolk‐sac larvae
Ø. Karlsen, A. Skiftesvik, J. V. Helvik
199813 citations
Semantic Scholar
Photoreception and transcriptomic response to light during early development of a teleost with a life cycle tightly controlled by seasonal changes in photoperiod
M. Eilertsen, David Dolan, C. M. Bolton, Rita Karlsen +6 more
2022PLoS Genetics11 citations Open access
Semantic Scholar
An EvoDevo Study of Salmonid Visual Opsin Dynamics and Photopigment Spectral Sensitivity
M. Eilertsen, Wayne I. L. Davies, Dharmeshkumar Patel, Jonathan E. Barnes +5 more
2022Frontiers in Neuroanatomy11 citations Open access
Semantic Scholar
Light conditions during Atlantic salmon embryogenesis affect key neuropeptides in the melanocortin system during transition from endogenous to exogenous feeding
S. Norland, A. Gomes, I. Rønnestad, J. V. Helvik +1 more
2023Frontiers in Behavioral Neuroscience7 citations Open access
Semantic Scholar
Heads and tails: The notochord develops differently in the cranium and caudal fin of Atlantic Salmon (Salmo salar, L.)
H. Kryvi, Kari Nordvik, P. Fjelldal, M. Eilertsen +3 more
2020The Anatomical Record6 citations Open access
Semantic Scholar
Morphology of the Hatching Glands in Betta splendens (Teleostei: Perciformes)
Paula M. Mabee, D. Cua, S. Barlow, J. V. Helvik
19986 citations
Semantic Scholar
Morphogenesis of the hatching gland of Atlantic halibut (Hippoglossus hippoglossus)
J. V. Helvik, D. O. Oppen-Berntsen, P. R. Flood, B. Walther
1991Roux's archives of developmental biology5 citations Open access
Semantic Scholar
Onset of circadian rhythmicity in the brain of Atlantic salmon is linked to exogenous feeding
M. Eilertsen, S. Norland, David Dolan, Rita Karlsen +5 more
2024PLoS ONE4 citations Open access
Semantic Scholar
Mapping the Pattern of Essential Neuroendocrine Cells Related to Puberty and VA Opsin Expression Provides Further Insight in the Photoreceptive Regulation of the Brain-Pituitary-Gonadal Axis in Atlantic Salmon (Salmo salar)
Christine Horne, J. V. Helvik, M. Fleming, P. Fjelldal +1 more
2022Brain, Behavior and Evolution4 citations
Semantic Scholar
Evidence for an ontogenetic change from pre-programmed to meal-responsive cck production in Atlantic herring, Clupea harengus L.
Yuko Kamisaka, J. V. Helvik, M. Tagawa, Masaru Tanaka +1 more
2013Comparative biochemistry and physiology. Part A, Molecular & integrative physiology4 citations
Semantic Scholar
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)
F. Yadetie, Xiao-Kang Zhang, A. Reboa, Gwenaëlle Samantha Chloe Noally +6 more
2025Frontiers in Endocrinology2 citations
Semantic Scholar
Developmental transition of visual and nonvisual photoreception and circadian clock during smoltification in the eye and brain of Atlantic salmon
M. Eilertsen, David W. P. Dolan, Rita Karlsen, T. Nilsen +2 more
2026PLoS ONE1 citations Open access
Semantic Scholar
Emergence of appetite and circadian rhythmicity in Atlantic salmon brain transcriptome from endogenous to exogenous feeding
S. Norland, M. Eilertsen, A. Gomes, David Dolan +3 more
2026PLoS ONE0 citations Open access
Semantic Scholar
The photoreceptive and neuroendocrine pineal organ of Atlantic salmon
Christine Horne, J. V. Helvik, Rita Karlsen, E. Denker +1 more
2026Frontiers in Physiology0 citations Open access
Semantic Scholar
Contents Vol. 56, 2000
B. Zikopoulos, M. Kentouri, C. R. Dermon, E. Caminos +18 more
2000Brain, Behavior and Evolution0 citations Open access
Semantic Scholar
Subject Index Vol. 56, 2000
B. Zikopoulos, M. Kentouri, C. R. Dermon, E. Caminos +18 more
2000Brain, Behavior and Evolution0 citations Open access
Semantic Scholar
Transglutaminase-generated crosslinks cause the hardening of cod eggshells (gadus morhua l.)
D. O. Oppen-Berntsen, J. V. Helvik, B. Walther
19890 citations Open access
Semantic Scholar
Restricted eggshell digestion during hatching of halibut (Hippolossus hippoglossu)
J. V. Helvik, D. O. Oppen-Berntsen, B. Walther
19890 citations
Semantic Scholar

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