Ragnar Nortvedt
Curriculum Vitae
I have many years experience as researcher (Master in 1987, PhD in 1997) and as 1183 researcher (since year 2000) and professor within fish feed formulation, nutrition, fish welfare and slaughter quality from IMR, NIFES and University of Bergen (1987 - 2008). In 2008 - 2012 I held two positions as Quality Manager and Director having responsibilities for product quality and food safety in the aquaculture industry and I managed a research consortium in medical image analysis and visualization (2012 - 2017) at Haukeland University Hospital. I was head of Matre Research Station (1211 Section manager) in the period 2017 - 2024. From April 2024 I returned to my former position as senior research scientist in the Feed & Nutrition research group in Bergen. The current research focus is on precision feeding by water transport. Lately I have also become focused on applications and ethical considerations on the applications of artificial intelligence. High mobility by working two periods at Matre, one period in Austevoll and two periods in Bergen is one of my key qualifications. I have also contributed as Manager of IK Akva at IMR for seven years and been member of the Miljøfyrtårn group for three years. Moreover, International tasks: I have managed two international committees through NOKUT to evaluate 1) The Master program and 2) The PhD program at the University College in Bodø before they became Nord University. I have been western coordinator of the 1st International Chemometric Conference in Zhangiage in China (1996), had six months sabattical at Pacific Biological Statiion in Nanaimo, Canada (2001) and worked as technical advisor for NORAD at University of Fisheries in NhaTrang, Vietnam (2004 - 2008). I have had a one year 20 % adjunct position as program coordinator in NRC (1998) and as 20 % researcher at Nofima Ingredients in Kjerreidviken (2008).
Publikasjoner
Vitenskapelige artikler (NVI)
2017
Prolonged intestinal transit and diarrhea in patients with an activating GUCY2C mutation
PLOS ONE
12
2016
Optimal AC frequency range for electro-stunning of Atlantic salmon (Salmo salar)
Aquaculture
451
p. 283-288
2014
Preventing injuries and recovery for electrically stunned Atlantic salmon (Salmo salar) using high frequency spectrum combined with a thermal shock
Aquaculture
434
p. 277-281
2014
The effect of stunning methods and season on muscle texture hardness in Atlantic salmon (Salmo salar L.)
Journal of Food Science
79
p. E1137-E1141
2013
Comparison of fillet composition and initial estimation of shelf life of cobia (Rachycentron canadum) fed raw fish or fish silage moist diets
Aquaculture Nutrition
19
p. 333-342
2013
Digital image analysis as a tool to quantify gaping and morphology in smoked salmon slices
Aquacultural Engineering
54
p. 64-71
2012
Live chilling of Atlantic salmon: physiological response to handling and temperature decrease on welfare
38
p. 565-571
2012
Crowding, pumping and stunning of Atlantic salmon, the subsequent effect on pH and rigor mortis
Aquaculture
326-329
p. 178-180
2011
Free amino acid distribution in plasma and liver of juvenile cobia (Rachycentron canadum) fed increased levels of lizardfish silage
Aquaculture Nutrition
17
p. E644-E656
2010
Effect of pre-slaughter procedures on stress responses and some quality parameters in sea-farmed rainbow trout (Oncorhynchus mykiss)
Aquaculture
309
p. 231-235
2010
Electrical stimulation of Atlantic salmon muscle and the effect on flesh quality
Aquaculture
301
p. 85-90
2010
Percussion and electrical stunning of Atlantic salmon (Salmo salar) after dewatering and subsequent effect on brain and heart activities
Aquaculture
300
p. 107-112
2010
Effects on digestibility and growth of juvenile cobia (Rachycentron canadum) fed fish or crab silage protein
Aquaculture Nutrition
16
p. 305-312
2009
Laksebein i fôr til torsk. - Biologisk evaluering av laksebeinmel som alternativ proteinkilde i torskefôr
Rubin
178
2009
Chemical and nutritional quality of silage made from raw or cooked lizard fish (Saurida undosquamis) and blue crab (Portunus pelagicus)
Journal of the Science of Food and Agriculture
89
p. 2519-2526
2009
A consumer preference study of raw Norwegian rainbow trout (Oncorhynchus mykiss) as sashimi with focus on young adults in Japan
44
p. 2055-2061
2009
Factors affecting residual blood and subsequent effect on bloodspotting in smoked Atlantic salmon fillets
Aquaculture
297
p. 163-168
2007
Optimization of activated carbon-based decontamination of fish oil by response surface methodology
European Journal of Lipid Science and Technology
109
p. 691-705
2007
Exsanguination of turbot and the effect on fillet quality measured mechanically, by sensory evaluation, and with computer vision
Journal of Food Science
72
p. E525-E531
2006
Quality characterization of farmed Atlantic halibut during ice storage
Journal of Food Science
71
p. 83-90
2006
Seasonal variations in muscle growth dynamics and selected quality attributes in Atlantic halibut (Hippoglossus hippoglossus L.) fed dietary lipids containing soybean and/or herring oil under different rearing regimes
Aquaculture
261
p. 565-579
2006
Compensatory growth and fillet crude composition in juvenile Atlantic halibut: Effects of short term starvation periods and subsequent feeding
Aquaculture
261
p. 109-117
2006
Nutritional composition of blubber and meat of hooded seal (Cystophora cristata) and harp seal (Phagophilus groenlandicus) from Greenland
Food Chemistry
96
p. 524-531
2006
Quality characterization of farmed Atlantic halibut during ice storage
Journal of Food Science
71
p. S83-S90
2006
Seasonal variations in muscle growth dynamics and selected quality attributes in Atlantic halibut (Hippoglossus hippoglossus L.) fed dietary lipids containing soybean and/or herring oil under different rearing regimes
Aquaculture
261
p. 565-579
2005
The effects of stress and storage temperature on the colour and texture of pre-rigor filleted farmed cod (Gadus morhua L.)
Aquaculture Research
36
p. 1197-1206
2004
Interactions between ice storage time, collagen composition, gaping and textural properties in farmed salmon muscle harvested at different times of the year
Aquaculture
240
p. 489-504
1991
Multivariate approach to the study of fish growth
Chemometrics and Intelligent Laboratory Systems
14
p. 279-286
1990
First feeding of Atlantic salmon, Salmo salar L., under different photoperiods and light intensities
Aquaculture and Fisheries Management
21
p. 435-441
1986
The effect of a short time exposure to different temperature and salinity regimes on survival of maturing Atlantic salmon and eyed eggs, and changes in blood and seminal plasma during the spawning period
ICES Journal of Marine Science
F:25
Faglige foredrag
2024
Fasteperioden før slakt av laks kan forkortes
2007
Produktutvikling fra silderogn
2006
Seasonal growth, muscle fibre size distribution and quality characterization of farmed atlantic halibut Hippoglossus hippoglossus fed soybean oil and/or marine lipids for 1 year
2004
Anvendelse av bildeanalyse og andre ikke-destruktive målemetoder for kvalitetsvurdering av fisk
2001
Interaction between raw material characteristics and smoking process on quality of smoked salmon
Poster
2011
ELECTRO STUNNING OF ATLANTIC SALMON (Salmo salar L.): FACTORS THAT AFFECT THE STUNNING CURRENT
2009
LIVE CHILLING OF ATLANTIC SALMON: EFFECTS FROM HANDLING AND TEMPERATURE DECREASE ON WELFARE
Rapporter og avhandlinger
2016
Measuring methods for fish welfare during slaughter based on electrical impedance, EEG, ECG and blood parameters
2016
Measuring methods for fish welfare during slaughter based on electrical impedance, EEG, ECG and blood
2007
The opportunities in the catfish surplus market in Vietnam
2007
Effects of synthetic antioxidants and light exporsure on fish oil oxidation and effects of graded levels of CoQ10 in fish feed on accumulation in fillet and liver of Atlantic salmon (Salmo salar L.)
2007
Injection of pre rigor fillets from Atlantic salmon (Salmo salar) and Atlantic cod (Gadus morhua) with salt solutions of Na+, Ca2+, and distilled water. The effect on rigor morits, texture, colour, and weight changes
2006
Tilsetning og forekomst av Listeria monocytogenes i rakfisk under systematisk variasjon i salt, sukker, nisin, melkesyrebakterier og variabel lagringstemperatur, samt effekter på sensorisk kvalitet
2006
Anbefalinger av kjemiske kvalitetsmetoder og prøvetakingsstørrelse på islagret oppdrettet og vill atlantisk torsk (Gadus morhua)
2006
Occurrence and distribution of parasitic Anisakis sp. larvae (Nematoda, Anisakidae) in the body musculature of Atlantic mackerel (Scomber scombrus) and Norwegian spring spawning herring (Clupea harengus)
2006
Anvendelse av Nær Infrarød Spektroskopi og kvalitetsindeksmetoden for å bestemme holdbarhet i torsk (Gadus morhua)
2006
Effects of graded levels of vitamin C and vitamin E on the oxidation status and color appearance of cool stored fillets and liver of Atlantic cod (Gadus morhua)
2006
Effekt av ulike bedøvelses- og slaktetemperaturregimer på korttidsstress og kvalitet hos oppdrettstorsk (Gadus morhua), vurdert ved kvalitetsindeksmetoden (QIM)
2006
Muscle growth dynamics and quality of Atlantic halibut (Hippoglossus hippoglossus L.)
2006
Application of machine vision to quantify rigor development, colour and fat content in slaughtered fish
2006
ATP degradation, fillet contraction and sensory evaluation of farmed Atlantic cod (Gadus morhua) subjected to a handling stress situation and starvation
2004
The fatty acid contents in the muscle and liver of wild, fed-wild and farmed cod (Gadus morhua), and its development of rancidity during storage in ice or in slurry
2004
A comparison of the quality deterioration in the Atlantic cod (Gadus morhua) and the Nile perch (Lates niloticus) stored in ice or slurry
1997
A multivariate approach to the study of growth, feed utilization, body composition and sensory assessment of cultured Atlantic halibut (Hippoglossu hippoglossus, L., 1758)
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