Øystein Sæle
Subjectarea
The use of raw materials in fish feed, that have not traditionally been used, is increasingly capturing my attention. This pertains to raw materials that are more sustainable than traditional ingredients and often produced in Northern Europe. It's important that we keep track of whether these ingredients have harmful effects on the fish. These raw materials often have different nutrients, such as the type of fatty acids in plant oils compared to fish oils. They may also contain substances that fish in nature wouldn't consume, such as complex carbohydrates (fibers) often found in plant-based protein sources.
To study the effect of different fat types, we not only use fish experiments but also fish cells, as in this study 10.3389/fmars.2022.954773. These tools allow us to uncover the mechanisms behind the physiological effects the feed has on fish.
The plant fibers that are part of sustainable fish feed have an effect on the fish's intestines through peristalsis, which is how the intestines mix and transport food. We have studied this in detail in fish such as ballan wrasse in this study 10.1371/journal.pone.0247076.
Curriculum Vitae
Jeg har jobbet mye med:
Fagfelt:
· Tildlig utvikling hos fisk, larve stadier ect.
· Ernæring og dens påvirkning på ontogeni.
· Ernæring hos “nye” arter, alle utviklingsstadier. Hva er fiskens behov, hvordan sikre god ernæring.
· Har erfaring med alle næringsstoff.
· Fordøyelsesfysiologi hos fisk, alt fra mageløs berggylt til laks.
· Appetit hos fisk og fôringsstrategier.
· Sammenhengen mellom ernæringsstatus og velferd.
Roller:
· Foreleser (Prof II på UiB)
· Organisasjons ledelse (fagforening), aktiv under fusjonen mellom NIFES ig HI
· Gruppeleder (stedfortreder)
· Prosjektsøking (ekstern)
· Prosjektledelse
Fagfelt:
· Tildlig utvikling hos fisk, larve stadier ect.
· Ernæring og dens påvirkning på ontogeni.
· Ernæring hos “nye” arter, alle utviklingsstadier. Hva er fiskens behov, hvordan sikre god ernæring.
· Har erfaring med alle næringsstoff.
· Fordøyelsesfysiologi hos fisk, alt fra mageløs berggylt til laks.
· Appetit hos fisk og fôringsstrategier.
· Sammenhengen mellom ernæringsstatus og velferd.
Roller:
· Foreleser (Prof II på UiB)
· Organisasjons ledelse (fagforening), aktiv under fusjonen mellom NIFES ig HI
· Gruppeleder (stedfortreder)
· Prosjektsøking (ekstern)
· Prosjektledelse
Publications
Academic articles
2025
Nutrient digestibility and faecal characteristics in rainbow trout, Oncorhynchus mykiss reared at different salinities and fed diets with varying protein to energy ratios
Aquaculture
606
2025
A dynamic simulation model for digestion, gut transit, and absorption in the ballan wrasse, Labrus bergylta
Aquaculture Reports
42
2025
Interaction between dietary saturated fatty acids and cholesterol on mineral and fatty acid availability and postprandial lipids absorption kinetics in Atlantic salmon (Salmo salar)
Aquaculture
600
p. 1-10
2024
The Interaction Between Dietary Fat Level, n-3 LC-PUFA, and Zinc on Their Postprandial Absorption Kinetics in Atlantic Salmon (Salmo salar)
Aquaculture Nutrition
2024
Dietary electrolyte imbalance alters drinking rate and gastrointestinal tract water fluxes of Atlantic salmon (Salmo salar) smolt in seawater
Aquaculture
585
p. 1-11
2024
The ontogeny of lymphoid organs and IgM+ B-cells in ballan wrasse (Labrus bergylta) reveals a potential site for extrarenal B-cell lymphopoiesis: The pancreas
Fish and Shellfish Immunology
144
2024
Salinity induced changes in the progression of water, ion and nutrient fluxes along the gastrointestinal tract of Atlantic salmon smolt (Salmo salar)
Aquaculture
580
2023
Risk assessment of Aquaterra® oil for its intended use as ingredient in fish feed. Scientific Opinion of the Norwegian Scientific Committee for Food and Environment
VKM Report
p. 1-58
2023
Risk assessment of Aquaterra® oil for its intended use as ingredient in fish feed. Scientific Opinion of the Norwegian Scientific Committee for Food and Environment
VKM Report
2023
p. 1-58
2023
Risk assessment of Aquaterra® oil for its intended use as ingredient in fish feed
VKM Report
8
p. 1-58
2023
The thymus and T-cell ontogeny in ballan wrasse (Labrus bergylta) is nutritionally modelled
Frontiers in Immunology
14
2023
Effect of dietary electrolyte balance on the interplay between water fluxes and digestive functioning along the gastrointestinal tract of freshwater rainbow trout (Oncorhynchus mykiss)
Aquaculture
563
2023
Soya saponins and prebiotics alter intestinal functions in Ballan wrasse (Labrus bergylta)
British Journal of Nutrition
2022
Optimization of the Balance between Protein, Lipid and Carbohydrate in Diets for Lumpfish (Cyclopterus lumpus)
Aquaculture Nutrition
p. 1-15
2022
Developmental stages of the ballan wrasse from first feeding through metamorphosis: Cranial ossification and the digestive system
Journal of Anatomy
241
p. 337-357
2022
A Screening Study on Effects Varying Dietary Macronutrient Composition on Gut Functions in Lumpfish (Cyclopterus lumpus)
Frontiers in Marine Science
9
p. 1-20
2022
Intracellular trafficking of fatty acids in the fish intestinal epithelial cell line RTgutGC
Frontiers in Marine Science
9
p. 1-15
2021
Digestive and immune functions in the intestine of wild Ballan wrasse (Labrus bergylta)
Comparative Biochemistry and Physiology A
260
2021
Physical and nutrient stimuli differentially modulate gut motility patterns, gut transit rate, and transcriptome in an agastric fish, the ballan wrasse
PLOS ONE
11
2021
Dietary Lipid Modulation of Intestinal Serotonin in Ballan Wrasse (Labrus bergylta)—In Vitro Analyses
Frontiers in Endocrinology
12
p. 1-15
2021
Technical feed quality influences health, digestion patterns, body mineralization and bone development in farming of the stomachless cleaner fish ballan wrasse (Labrus bergylta)
Animal Feed Science and Technology
274
p. 1-19
2020
Dietary 18:2n-6 affects EPA (20:5n-3) and ARA (20:4n-6) content in cell membranes and eicosanoid production in Atlantic salmon (Salmo salar L.)
Aquaculture
522
2019
Effects of cholecystokinin (CCK) on gut motility in the stomachless fish ballan wrasse (Labrus bergylta)
Frontiers in Neuroscience
13:553
p. 1-20
2019
A single meal containing phytosterols does not affect the uptake or tissue distribution of cholesterol in zebrafish (Danio rerio)
Frontiers in Marine Science
6
2019
Intestinal function of the stomachless fish, ballan wrasse (Labrus bergylta)
Frontiers in Marine Science
6
p. 1-15
2018
A novel system to quantify intestinal lipid digestion and transport
Biochimica et Biophysica Acta - Molecular and Cell Biology of Lipids
1863
p. 948-957
2018
Effects of dietary vegetable oils and varying dietary EPA and DHA levels on intestinal lipid accumulations in Atlantic salmon
Aquaculture Nutrition
24
p. 1599-1610
2018
Loss of stomach, loss of appetite? Sequencing of the ballan wrasse (Labrus bergylta) genome and intestinal transcriptomic profiling illuminate the evolution of loss of stomach function in fish
BMC Genomics
19
p. 1-17
2018
T cell receptor alpha chain genes in the teleost Ballan wrasse (Labrus bergylta) are subjected to somatic hypermutation
Frontiers in Immunology
9:1101
p. 1-11
2018
Effects of dietary vegetable oils and varying dietary EPA and DHA levels on intestinal lipid accumulations in Atlantic salmon
Aquaculture Nutrition
379
p. 1075
2018
TCR alpha chain genes in the teleost Ballan wrasse (Labrus bergylta) are subjected to somatic hypermutation
Frontiers in Immunology
9
p. 1101
2018
A novel system to quantify intestinal lipid digestion and transport
Biochimica et Biophysica Acta (BBA)-Molecular and Cell Biology of Lipids
1863
p. 948-957
2018
Loss of stomach, loss of appetite? Sequencing of the ballan wrasse (Labrus bergylta) genome and intestinal transcriptomic profiling illuminate the evolution of loss of stomach function in fish
BMC genetics
19
p. 186
2017
Ossification of Atlantic cod (Gadus morhua) – Developmental stages revisited
Aquaculture
468 Part 1
p. 524-533
2017
The polycyclic aromatic hydrocarbons benzo[a]pyrene and phenanthrene inhibit intestinal lipase activity in rainbow trout (Oncorhynchus mykiss)
198
p. 1-8
2017
Ossification of Atlantic cod (Gadus morhua)–Developmental stages revisited
Aquaculture
468
p. 524-533
2017
The polycyclic aromatic hydrocarbons benzo [a] pyrene and phenanthrene inhibit intestinal lipase activity in rainbow trout (Oncorhynchus mykiss)
Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology
198
p. 1-8
2016
Minor lipid metabolic perturbations in the liver of Atlantic salmon (Salmo salar L.) caused by suboptimal dietary content of nutrients from fish oil
42
p. 1463-1480
2016
Minor lipid metabolic perturbations in the liver of Atlantic salmon (Salmo salar L.) caused by suboptimal dietary content of nutrients from fish oil
Fish physiology and biochemistry
42
p. 1463-1480
2015
Impact of dietary selenium on methylmercury toxicity in juvenile Atlantic cod: A transcriptional survey
Chemosphere
120
p. 199-205
2015
Impact of dietary selenium on methylmercury toxicity in juvenile Atlantic cod: a transcriptional survey
Chemosphere
120
p. 199-205
2013
Genetic ontogeny of pancreatic enzymes in Labrus bergylta larvae and the effect of feed type on enzyme activities and gene expression
164
p. 176-184
2013
Toxic effects of dietary hydrolysed lipids: an in vivo study on fish larvae
British Journal of Nutrition
109
p. 1071-1081
2013
Feeding behaviour and digestive physiology in larval fish: current knowledge, and gaps and bottlenecks in research
Reviews in Aquaculture
5
p. S59-S98
2013
Iodine nutrition and toxicity in Atlantic cod (Gadus morhua) larvae
PeerJ
2013
Toxic effects of dietary hydrolysed lipids: an in vivo study on fish larvae.
British Journal of Nutrition
109
p. 1071-1081
2013
Iodine nutrition and toxicity in Atlantic cod (Gadus morhua) larvae
PeerJ
1
p. e20
2013
Toxic effects of dietary hydrolysed lipids: an in vivo study on fish larvae
British Journal of Nutrition
109
p. 1071-1081
2013
Genetic ontogeny of pancreatic enzymes in Labrus bergylta larvae and the effect of feed type on enzyme activities and gene expression
Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology
164
p. 176-184
2013
Feeding behaviour and digestive physiology in larval fish: current knowledge, and gaps and bottlenecks in research
Reviews in Aquaculture
5
2012
Selenium supplementation changes glutathione peroxidase activity and thyroid hormone production in Senegalese sole (Solea senegalensis) larvae
Aquaculture Nutrition
18
p. 559-567
2012
Iodine and selenium supplementation increased survival and changed thyroid hormone status in Senegalese sole (Solea senegalensis) larvae reared in a recirculation system
38
p. 725-734
2012
Pre-digestion of dietary lipids has only minor effects on absorption, retention and metabolism in larval stages of Atlantic cod (Gadus morhua).
British Journal of Nutrition
105
p. 846-856
2012
Selenium supplementation changes glutathione peroxidase activity and thyroid hormone production in Senegalese sole (Solea senegalensis) larvae.
Aquaculture Nutrition
18
p. 559-567
2012
Iodine and selenium supplementation increased survival and changed thyroid hormone status in Senegalese sole (Solea senegalensis) larvae reared in a recirculation system
Fish Physiol. Biochem
38
p. 725-734
2011
Pre-digestion of dietary lipids has only minor effects on absorption, retention and metabolism in larval stages of Atlantic cod (Gadus morhua)
British Journal of Nutrition
105
p. 846-856
2011
Characterisation and expression of secretory phospholipase A(2) group IB during ontogeny of Atlantic cod (Gadus morhua)
British Journal of Nutrition
105
p. 228-237
2011
Effect of iodine enrichment of Artemia sp on their nutritional value for larval zebrafish (Danio rerio)
Aquaculture
316
p. 37-43
2011
Iodine-enriched rotifers and Artemia prevent goitre in Senegalese sole (Solea senegalensis) larvae reared in a recirculation system
Aquaculture Nutrition
17
p. 248-257
2011
Iodine-enriched rotifers and Artemia prevent goitre in Senegalese sole (Solea senegalensis) larvae reared in a recirculation system.
Aquaculture Nutrition
17
p. 248-257
2011
Characterisation and expression of secretory phospholipase A(2) group IB during ontogeny of Atlantic cod (Gadus morhua).
British journal of Nutrition
105
p. 228-237
2011
Effect of iodine enrichment of Artemia sp on their nutritional value for larval zebrafish (Danio rerio).
Aquaculture
316
p. 37-43
2010
Biomarker candidate discovery in Atlantic cod (Gadus morhua) continuously exposed to North Sea produced water from egg to fry
Aquatic Toxicology
96
p. 280-289
2010
Looking closer at the determining of a phenotype? Compare by stages or size, not age
Journal of Applied Ichthyology
26
p. 294-297
2010
Increasing the level of selenium in rotifers (Brachionus plicatilis ‘Cayman’) enhances the mRNA expression and activity of glutathione peroxidase in cod (Gadus morhua L.) larvae
Aquaculture
306
p. 259-269
2010
Characterization and expression of digestive neutral lipases during ontogeny of Atlantic cod (Gadus morhua)
Comparative Biochemistry and Physiology A
157
p. 252-259
2010
Characterization and expression of digestive neutral lipases during ontogeny of Atlantic cod (Gadus morhua)
Comp Biochem Physiol A-Mol Integr Physiol
157
p. 252-259
2010
Biomarker candidate discovery in Atlantic cod (Gadus morhua) continuously exposed to North Sea produced water from egg to fry
Aquatic Toxicology
96
p. 280-289
2010
Looking closer at the determining of a phenotype? Compare by stages or size, not age
Journal of Applied Ichthyology
26
p. 294-297
2010
Increasing the level of selenium in rotifers (Brachionus plicatilis 'Cayman') enhances the mRNA expression and activity of glutathione peroxidase in cod (Gadus morhua L.) larvae
Aquaculture
306
p. 259-269
2009
Evaluation of candidate reference genes in Q-PCR studies of Atlantic cod (Gadus morhua) ontogeny, with emphasis on the gastrointestinal tract
152
p. 94-101
2009
Evaluation of candidate reference genes in Q-PCR studies of Atlantic cod (Gadus morhua) ontogeny, with emphasis on the gastrointestinal tract
Comp Biochem Physiol B Biochem Mol Biol
152
p. 94-101
2008
The molecular and encocrine basis of flatfish metamorphosis
Reviews in fisheries science
16
p. 95-111
2008
The molecular and endocrine basis of flatfish metamorphosis
Reviews in Fisheries Science
16
p. 1-17
2008
Rotifers enriched with iodine and selenium increase survival in Atlantic cod (Gadus morhua) larvae
Aquaculture
284
p. 190-195
2007
Spatial transcription of CYP1A in fish liver
BMC Physiology
7
p. 12-12
2007
Spatial transcription of CYP1A in fish liver
BMC Physiololgy
7
2006
Twisted story of eye migration in flatfish
Journal of morphology
267
p. 730-738
2006
Post-embryonic remodelling of neurocranial elements: a comparative study of normal versus abnormal eye migration in a flatfish, the Atlantic halibut
Journal of Anatomy
209
p. 31-41
2006
The twisted story of eye migration in flatfish
Journal of Morphology
267
p. 760 – 768
2006
Post embryonic remodelling of neurocranial elements, a comparative study of normal versus abnormal eye migration in the flatfish Atlantic halibut.
Journal of Anatomy
209
p. 31-41
2004
Staging of Atlantic halibut (Hippoglossus hippoglossus L.) from first feeding through metamorphosis, including cranial ossification independent of eye migration
Aquaculture
239
p. 445-465
2004
Influence of Egg Vitamin a Status and Egg Incubation Temperature on Subsequent Development of the Early Vertebral Column in Atlantic salmon Fry
Journal of Fish Biology
64
p. 399-417
2004
Staging of Atlantic Halibut (Hippoglossus Hippoglossus L.) From First Feeding Through Metamorphosis, Including Cranial Ossification Independent of Eye Migration
Aquaculture
239
p. 445-465
2003
The effect of diet on ossification and eye migration in Atlantic halibut larvae (Hippoglossus hippoglossus L.).
Aquaculture
220
p. 683 - 696
Other journal contributions
2018
The function of Cholecystokinin (CCK) on gut motility in the stomachless fish Ballan wrasse
Neurogastroenterology and Motility
30
2014
Corrigendum to "Genetic ontogeny of pancreatic enzymes in Labrus bergylta larvae and the effect of feed type on enzyme activities and gene expression" [Comp. Biochem. Physiol. B 164 (2013) 176-184]
170
p. 42
2008
Phenotypic plasticity as a correlate of metabolic scaling in teleosts
Comparative Biochemistry and Physiology A
151
p. S46-S46
2008
Phenotypic plasticity as a correlate of metabolic scaling in teleosts
Comparative Biochemistry and Physiology - Part A: Comparative Physiology
151
p. S46-S46
Scientific lectures
2024
MucoProtect: Et lovende nytt bio-mimisk system for oral levering av mukosale vaksiner i atlantisk laks
2024
Optimalisering av makronæringsstoffer i kveitefôr
2024
SKREENING FOR VITAMIN AND MINERAL REQUIREMENTS IN THE ATLANTIC HALIBUT DIET
2023
Optimalization of the macronutrient composition in the Atlantic halibut diet
2022
Insights into the modulation of pigmentation and eye migration in farmed Atlantic halibut (Hippoglossus hippoglossus)
2022
Leucine’s dietary supplementation effect on the regulation of stress in farmed Atlantic salmon (Salmo salar L.)
2022
Optimizing nutrition and feeding of ballan wrasse for better welfare and survival in salmon pens
2022
Consequence of enniatin B and beauvericin on salmon intestinal health
2021
Ontogenetic shift and lateralized swimming behavior in Atlantic halibut (Hippoglossus hippoglossus)
2021
Balansert sammensetning av makronæringsstoffer i fôr til rognkjeks (Cyclopterus lumpus)
2021
Gut health effects in Atlantic salmon Salmo salar L. of low dietary fish meal level can be limited by dietary supplements
2019
Makronæringsstoff i fôr til rognkjeks
2018
Nutrition in Atlantic halibut
2018
Gut health monitoring during the Seawater Phase of Farmed Atlantic Salmon in Different Production Regions of Norway - The GutMatters Project
2014
Functionality of the cleaner fish, ballan wrasse, intestine
2013
Lipid digestion in first feeding larvae, visualization in vivo
2013
Status coordinated action - LeppeProd
2012
Lipid digestion in first feeding larvae, an in vivo study
2012
Lipid fordøyelse ved startfôring av fiskelarver in vivo
2009
Metamorphosis or the larva-juvenile transition: steering the future of the foodfish industry
Poster
2021
Ontogenetic shift and lateralized behavior in Atlantic halibut (Hippoglossus hippoglossus)
2019
Gut health status in farmed Atlantic salmon (Salmo salar L.) in different seawater production localities in Norway - GutMatters project
2018
The function of Cholecystokinin (CCK) on gut motility in the stomachless fish Ballan wrasse
2018
GutMatters – Kartlegging og forbedring av tarmhelsen hos oppdrettslaks - Et nytt FHF-prosjekt
2013
Intestinal lipid digestion of the first larval meal – visualization in vivo of the vertebrate fat metabolism
2012
An Integrated approach to assess Toxicity of brominated flame Retardants in Mouse Models
2011
Lipidfordøyelse i torskelarver
2005
Where is the asymmetry in the Atlantic halibut (Hippoglossus hippoglossus) head?
Reports and dissertations
2025
Kvalitetskriterier for rensefisk og effekten av stamfiskerernæring - CleanLifeCycle
Rapport fra havforskningen
2021
Ernæringsbehov og fôring for optimal helse og overlevelse av rensefisk - Del 2 Rognkjeks
2021
Ernæringsbehov og fôring for optimal helse og overlevelse av rensefisk - Del 1 berggylt
2019
Digestive physiology of the stomachless fish, ballan wrasse (Labrus bergylta)
2016
Effekter av endret fettsyresammensetning i fôr til laks relatert til fiskens helse, velferd og robusthet (Fett for fiskehelse): Oppdatering 2016
2013
Ballan wrasse (Labrus bergylta) Larvae and Live-Feed Quality; Effects on Growth and Expression of Genes related to Mitochondrial Functions
2006
Metamorphosis in Atlantic halibut, with emphasis on eye migration
2006
Expression of Immunoglobulin M (IgM) in metamorphosing larvae of Atlantic halibut (Hippoglossus hippoglossus L.), detected by in situ hybridization
Net reports
Net reports
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