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Viser treff 1-49 av 49

2018
1 Eilertsen, Mariann; Valen, Ragnhild; Drivenes, Øyvind; Ebbesson, Lars O.E.; Helvik, Jon Vidar.
Transient photoreception in the hindbrain is permissive to the life history transition of hatching in Atlantic halibut. Developmental Biology 2018 ;Volum 444.(2) s. 129-138
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2 Valen, Ragnhild; Karlsen, Rita; Helvik, Jon Vidar.
Environmental, population and life-stage plasticity in the visual system of Atlantic cod. Journal of Experimental Biology 2018 ;Volum 221.(1) s. 1-13
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2017
3 Busserolles de, Fanny; Cortesi, Fabio; Helvik, Jon Vidar; Davies, Wayne I. L.; Templin, Rachel M.; Sullivan, Robert K. P.; Michell, Craig T.; Mountford, Jessica K.; Collin, Shaun P.; Irigoien, Xabier; Kaartvedt, Stein; Marshall, Justin.
Pushing the limits of photoreception in twilight conditions: The rod-like cone retina of the deep-sea pearlsides. Science Advances 2017 ;Volum 3.(11) s. 1-13
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2016
4 Valen, Ragnhild; Eilertsen, Mariann; Edvardsen, Rolf; Furmanek, Tomasz; Rønnestad, Ivar; van der Meeren, Terje; Karlsen, Ørjan; Nilsen, Tom Ole; Helvik, Jon Vidar.
The two-step development of a duplex retina involves distinct events of cone and rod neurogenesis and differentiation. Developmental Biology 2016 ;Volum 416.(2) s. 389-401
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5 Valen, Ragnhild.
Visual photoreception in Atlantic cod (Gadus morhua) – Genomic restrictions, neurogenesis and life history transformation. : University of Bergen 2016 (ISBN 978-82-308-3410-7)
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2015
6 Nilsen, Tom Ole; Lukas, Juliane; Valen, Ragnhild; Helvik, Jon Vidar; Ebbesson, Lars O.E.; Rønnestad, Ivar; Hamre, Kristin; Handeland, Sigurd O; Stefansson, Sigurd Olav.
Utvikling av osmoreguleringssystemet hos torskelarver startfôret på rotatorier eller naturlig zooplankton. Norsk Fiskeoppdrett 2015 ;Volum E1. s. 36-38
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2014
7 Eilertsen, Mariann; Drivenes, Øyvind; Edvardsen, Rolf; Bradley, Clarissa A.; Ebbesson, Lars O.E.; Helvik, Jon Vidar.
The exorhodopsin and melanopsin systems in the pineal complex and brain at early developmental stages of Atlantic halibut (Hippoglossus hippoglossus). Journal of Comparative Neurology 2014 ;Volum 522.(18) s. 4003-4022
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8 Gorissen, Marnix; Nilsen, Tom Ole; Bye-Ingebrigtsen, Einar; Handeland, Sigurd O.; Helvik, Jon Vidar; Stefansson, Sigurd Olav; Flik, Gert; Ebbesson, Lars O.E..
EXPLORING PHYSIOLOGICAL FUNCTIONS OF THE PLEIOTROPHIC MELANOCORTIN ALPHA-MSH IN ATLANTIC SALMON. International Congress on the Biology of Fish; 2014-08-03 - 2014-08-07
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9 Valen, Ragnhild; Edvardsen, Rolf; Søviknes, Anne Mette; Drivenes, Øyvind; Helvik, Jon Vidar.
Molecular evidence that only two opsin subfamilies, the blue light- (SWS2) and green light-sensitive (RH2), drive color vision in Atlantic cod (Gadus morhua).. PLOS ONE 2014 ;Volum 9:e0115436.(12)
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2013
10 Kamisaka, Yuko; Helvik, Jon Vidar; Tagawa, Masatomo; Tanaka, Masaru; Rønnestad, Ivar.
Evidence for an ontogenetic change from pre-programmed to meal-responsive cck production in Atlantic herring, Clupea harengus L. Comparative Biochemistry and Physiology A 2013 ;Volum 164.(1) s. 17-20
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2012
11 Sandbakken, Mari; Ebbesson, Lars O.E.; Stefansson, Sigurd Olav; Helvik, Jon Vidar.
Isolation and characterization of melanopsin photoreceptors of atlantic salmon (Salmo salar). Journal of Comparative Neurology 2012 ;Volum 520.(16) s. 3727-3744
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2011
12 Ebbesson, Lars O.E.; Nilsen, Tom Ole; Helvik, Jon Vidar; Tronci, Valentina; Stefansson, Sigurd Olav.
Corticotropin-Releasing Factor Neurogenesis during Midlife Development in Salmon: Genetic, Environmental and Thyroid Hormone Regulation. Journal of neuroendocrinology 2011 ;Volum 23.(8) s. 733-741
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2009
13 Helvik, Jon Vidar; Rødahl, Eyvind; Drivenes, Øyvind; Haarr, Lars.
Identification and Characterization of Two Zebrafish Nectin-1 Genes That Are Differentially Expressed in the Developing Eye and Brain. Developmental Dynamics 2009 ;Volum 238.(1) s. 43-55
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2008
14 Hoppmann, Verena; Wu, Jun J.; Søviknes, Anne Mette; Helvik, Jon Vidar; Becker, Thomas S..
Expression of the eight AMPA receptor subunit genes in the developing central nervous system and sensory organs of zebrafish. Developmental Dynamics 2008 ;Volum 237.(3) s. 788-799
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15 Karlsen, Marius; Nylund, Are; Watanabe, Kuninori; Helvik, Jon Vidar; Nylund, Stian; Plarre, Heidrun.
Characterization of 'Candidatus Clavochlamydia salmonicola': an intracellular bacterium infecting salmonid fish. Environmental Microbiology 2008 ;Volum 10.(1) s. 208-218
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16 Zhao, Xiaofeng; Fjose, Anders; Larsen, Natalia; Helvik, Jon Vidar; Drivenes, Øyvind.
Treatment with small interfering RNA affects the microRNA pathway and causes unspecific defects in zebrafish embryos. The FEBS Journal 2008 ;Volum 275. s. 2177-2184
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2007
17 Schander, Christoffer; Helvik, Jon Vidar; Lindblom, Louise; Høie, Eli Neshavn.
Biology Education at University of Bergen Part I. A Background Document. Bergen: Universitetet i Bergen/Institutt for Biologi 2007
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2005
18 Kamisaka, Y; Drivenes, Øyvind; Kurokawa, T; Tagawa, M; Rønnestad, Ivar; Tanaka, M; Helvik, Jon Vidar.
Cholecystokinin mRNA in Atlantic herring, Clupea harengus - molecular cloning, characterization, and distribution in the digestive tract during the early life stages. Peptides 2005 ;Volum 26.
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19 Skern, Rasmus.
Trypsin and trypsin-like peptidases from Lepeophtheirus salmonis. Functional implications from molecular studies. Universitetet i Bergen 2005 (ISBN 82-308-0058-8) 126 s.
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2004
20 Helvik, Jon Vidar; Ebbesson, Lars; Eilertsen, Marianne; Seo, Hee-Chan; Fjose, Anders; Drivenes, Øyvind.
Early expression of VA opsin in Atlantic halibut. Society for Neuroscience, 34th annual meeting; 2004-10-23 - 2004-10-27
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2003
21 ALLISON,, W. TED; DANN, STEPHEN G; Helvik, Jon Vidar; BRADLEY, CLARRISA; MOYER, HEATHER D; HAWRYSHYN, CRAIG W..
Ontogeny of Ultraviolet-Sensitive Cones in the Retina of Rainbow Trout (Oncorhynchus mykiss). Journal of Comparative Neurology 2003 ;Volum 461. s. 294-306
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22 Drivenes, Øyvind; Søviknes, Anne Mette; Ebbesson, Lars O. E.; Seo, Hee-Chan; Fjose, Anders; Helvik, Jon Vidar.
Isolation and characterization of two teleost melanopsin genes and their differential expression within the inner retina and brain. Journal of Comparative Neurology 2003 ;Volum 456.(1) s. 84-93
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23 Weltzien, Finn Arne; Nordberg, Birgitta; Helvik, Jon Vidar; Andersen, Øyvind; Swanson, Penny; Anderson, Eva.
Identification and localization of eight distinct hormone-producing cell types in the pituitary of male Atlantic halibut (Hippoglossus hippoglossus L.). Comparative biochemistry and physiology. B. Comparative biochemistry 2003 ;Volum 134.(2) s. 315-327
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24 Weltzien, Finn-Arne; Andersen, Øivind; Norberg, Birgitta; Helvik, Jon Vidar; Swanson, Penny; Andersson, Eva.
Identification and localization of eight distinct hormone-producing cell types in the pituitary of male Atlantic halibut (hippoglossus hippoglossus). Comparative Biochemistry and Physiology A 2003 ;Volum 134. s. 315-327
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2002
25 Drivenes, Øyvind; Søviknes, Anne Mette; Ebbesson, Lars O. E.; Helvik, Jon Vidar.
A dual non-visual photoreception system consisting of two melanopsins found in teleosts. 26th Annual Larval Fish Conference; 2002-07-22 - 2002-07-26
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26 Drivenes, Øyvind; Søviknes, Anne Mette; Ebbesson, Lars O. E.; Helvik, Jon Vidar.
Visual and non-visual reception in marine fish larvae. SEMINAR MARE; 2002-10-30 - 2002-10-31
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27 Helvik, Jon Vidar; Søviknes, Anne Mette; Drivenes, Øyvind.
The developing visual system and metamorphosis in flatfish. Programkonferanse HAVBRUK OG VILLAKS; 2002-09-16 - 2002-09-18
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28 Helvik, Jon Vidar; Søviknes, Anne Mette; Drivenes, Øyvind.
Topographic specialisation of photoreceptor cells within retina of marine fish larvae. 26th Annual Larval Fish Conference; 2002-07-22 - 2002-07-26
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29 Søviknes, Anne Mette; Drivenes, Øyvind; Wu, Jun J.; Becker, Thomas S.; Helvik, Jon Vidar.
Molecular cloning and characterisation of ultraviolet-sensitive opsin promoter from turbot. 26th Annual Larval Fish Conference; 2002-07-22 - 2002-07-26
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2001
30 Doldán Dans, María Jesús; Holmqvist, Bo; Prego Martinez, Benjamín; Helvik, Jon Vidar; de Miguel, Encarnación.
Differentiation of serotonergic circuits in the brain of the turbot (Psetta maxima). 3rd European Conference on Comparative Neurobiology: Modern views on brain homologies".; 2001-04-19 - 2001-04-21
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31 Drivenes, Øyvind; Søviknes, Anne Mette; Seo, Hee-Chan; Fjose, Anders; Helvik, Jon Vidar.
A novel nonvisual pigment gene cloned from teleost retina. 37th Annual contact meeting, Norwegian Society of Biochemistry; 2001-01-18 - 2001-01-21
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32 Helvik, Jon Vidar; Drivenes, Øyvind; Habroe, Torstein; Seo, Hee-Chan.
Topography of different photoreceptor cell types in the larval retina of Atlantic halibut (Hippoglossus hippoglossus). Journal of Experimental Biology 2001 ;Volum 204. s. 2553-2559
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33 Helvik, Jon Vidar; Drivenes, Øyvind; Næss, Tore; Fjose, Anders; Seo, Hee-Chan.
Molecular cloning and characterisation of five opsin genes from the marine flatfish Atlantic halibut (Hippoglossus hippoglossus). Visual Neuroscience 2001 ;Volum 18. s. 767-780
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1998
34 Folkvord, Arild; Blom, Geir; Helvik, Jon Vidar; Holmqvist, Bo I.; Johannessen, Arne; Otterlei, Erling; Stefansson, Sigurd; Brattegard, Torleiv.
Teori- og eksperimentbasert studie av rekruttering hos marin fisk. Sluttrapport for del I av Strategisk Program. : Inst. for fiskeri- og marinbiologi, Univ. i Bergen 1998 ;Volum 7.46 s. IFM rapport
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35 Karlsen, Ørjan; Skiftesvik, Anne Berit; Helvik, Jon Vidar.
The effect of light on activity and growth of Atlantic halibut, Hippoglossus hippoglossus L., yolk-sac larvae. Aquaculture Research 1998 ;Volum 29.(12) s. 899-912
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1996
36 Helvik, Jon Vidar; Karlsen, Ørjan.
The effect of light- and dark-rearing on the development of the eyes of Atlantic halibut (Hippoglossus hippoglossus) yolk sac larvae. Marine and Freshwater Behaviour & Physiology 1996 ;Volum 28. s. 107-121
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1994
37 Kvenseth, A. M.; Pittman, Karin; Helvik, Jon Vidar.
Når kan kveitelarven se? - en brikke i puslespillet omkring startforing av kveite. Norsk Fiskeoppdrett 1994 ;Volum 19.(5) s. 30-31
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1993
38 Helvik, Jon Vidar; Walther, Bernt T..
Development of hatchability in halibut (Hippoglossus hippoglossus) embryos. International Journal of Developmental Biology 1993 ;Volum 37. s. 487-490
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39 Kvenseth, Anne Mette; Pittman, Karin; Helvik, Jon Vidar.
The development of the halibut eye. ICES Symposium on Mass Rearing of Juvenile Fish; 1993
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1992
40 Helvik, Jon Vidar.
Biology of hatching : mechanism and control of hatching in eggs of halibut (Hippoglossus hippoglossus). Bergen: School of Mathematics and Sciences, University of Bergen 1992 (ISBN 82-7558-007-2) 1 s.
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41 Helvik, Jon Vidar; Walther, Bernt T..
Photo-regulation of the hatching process in halibut (Hippoglossus hippoglossus) eggs. Journal of Experimental Zoology. Part A: Ecological Genetics and Physiology 1992 ;Volum 263. s. 204-209
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42 Oppen-Berntsen, D. O.; Hyllner, S. J.; Haux, C.; Helvik, Jon Vidar; Walther, Bernt T..
Eggshell zona radiat-proteins: Extra-ovarian origin and induction by estradiol-17_b. International Journal of Developmental Biology 1992 ;Volum 36. s. 247-254
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1991
43 Helvik, Jon Vidar; Flood, P. R.; Walther, Bernt T.; Oppen-Berntsen, D. O..
Morphogenesis of the hatching gland of Atlantic halibut (Hippoglossus hippoglossus). Roux's Archives of Developmental Biology 1991 ;Volum 200. s. 180-187
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44 Helvik, Jon Vidar; Oppen-Berntsen, D. O.; Flood, P. R.; Walther, Bernt T..
Morphogenesis of the hatching gland of Atlantic halibut (Hippoglossus hippoglossus). Roux's Archives of Developmental Biology 1991 ;Volum 200. s. 180-187
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45 Helvik, Jon Vidar; Oppen-Berntsen, D. O.; Walther, Bernt T..
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). International Journal of Developmental Biology 1991 ;Volum 35. s. 9-16
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46 Helvik, Jon Vidar; Oppen-Berntsen, D. O.; Walther, Bernt T..
The hatching mechanism in Atlantic halibut (Hippoglossus hippoglossus). International Journal of Developmental Biology 1991 ;Volum 35. s. 9-16
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47 Hyllner, S. J.; Oppen-Berntsen, D. O.; Helvik, Jon Vidar; Walther, Bernt T.; Haux, C..
Oestradiol -17_b induces the major vitellin envelope proteins in both sexes in teleosts. Journal of Endocrinology 1991 ;Volum 131. s. 229-236
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48 Hyllner, S. J.; Oppen-Berntsen, D. O.; Helvik, Jon Vidar; Walther, Bernt T.; Haux, C..
Oestradiol 17_b induces the major vitelline envelope proteins in both sexes in teleosts. Journal of Endocrinology 1991 ;Volum 131. s. 229-236
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1990
49 Bergh, Øivind; Hansen, Geir Høvik; Jelmert, Anders; Helvik, Jon Vidar.
Bakterier på kveiteegg er en viktig årsak til dødelighet. Norsk Fiskeoppdrett 1990 ;Volum 13. s. 32-33
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