Ole Folkedal
Arbeidsområde
My main research interest is fish behavior in aquaculture, with focus on novel production systems and technologies.
Curriculum Vitae
Education
PhD, October 2010: University of Bergen/Institute of Marine research. Thesis title: Anticipatory behaviour as indicator for stress and welfare in farmed Atlantic salmon at different life stages.
Master, September 2006: University of Bergen/Institute of Marine research. Thesis title: Effects of group size and light regime on swimming depth and social interactions of individual Atlantic salmon (Salmo salar L.) in a sea cage.
Publikasjoner
Vitenskapelige artikler (NVI)
2025
Clinical Presentation and Pathological Effects of a Hydrozoan Bloom on Farmed Atlantic Salmon
Journal of Fish Diseases
2025
Physiological performance and cardiac morphology of Atlantic salmon reared under slow and fast growth conditions
Aquaculture Reports
2025
Premises for digital twins reporting on Atlantic salmon wellbeing
Behavioural Processes
226
2025
Adaptations to intermittent fasting in large sea caged Atlantic salmon (Salmo salar); effects on feeding, energy homeostasis, and growth
Aquaculture
599
2024
Importance of environmental signals for cardiac morphological development in Atlantic salmon
Journal of Experimental Biology
227
2024
Exposed Aquaculture Operations: Strategies for Safety and Fish Welfare
Reviews in Aquaculture
2024
Post-smolt Atlantic salmon can regulate buoyancy in submerged sea-cages by gulping air bubbles
Aquacultural Engineering
107
2024
Post-smolt Atlantic salmon can regulate buoyancy in submerged sea-cages by gulping air bubbles
Aquacultural Engineering
107
2024
Exposed Aquaculture Operations: Strategies for Safety and Fish Welfare
Reviews in Aquaculture
2024
Freshwater history influences farmed Atlantic salmon (Salmo salar) performance in seawater
Aquaculture
586
2024
Efficiency of salmon production in submerged cages with air domes matches standard surface cages when environments are similar
Aquaculture
586
2024
Behavioral and neurophysiological effects of buspirone in healthy and depression-like state juvenile salmon
Frontiers in Behavioral Neuroscience
18
2023
Impact of long-term fasting on the stomach-hypothalamus appetite regulating genes in Atlantic salmon postsmolts
Aquaculture
563
2023
Effect of water temperature and exposure duration on detachment rate of salmon lice (Lepeophtheirus salmonis); testing the relevant thermal spectrum used for delousing
Aquaculture
562
2023
Novel tag-based method for measuring tailbeat frequency and variations in amplitude in fish
Animal Biotelemetry
11
2023
Welfare effects of environmental hypercapnia quantified by indicators based on morphology and allostatic load in Atlantic salmon (Salmo salar)
Aquaculture
572
2022
Supersizing salmon farms in the coastal zone: A global analysis of changes in farm technology and location from 2005 to 2020
Aquaculture
553
p. 1-17
2022
Automatic length estimation of free-swimming fish using an underwater 3D range-gated camera
Aquacultural Engineering
97
2022
Deployment of hydroacoustic feeding control in salmon sea-cages; biological and technical considerations
Aquaculture
561
2021
Thermal delousing in anaesthetised small Atlantic salmon (Salmo salar) post-smolts: A case study showing the viability of anaesthesia prior to delousing for improved welfare during treatment for salmon lice
Animal Welfare
30
p. 117-120
2021
Full compensatory growth before harvest and no impact on fish welfare in Atlantic salmon after an 8-week fasting period
Aquaculture
546
2021
Submerged cage aquaculture of marine fish: a review of the biological challenges and opportunities
Reviews in Aquaculture
2021
Full production cycle, commercial scale culture of salmon in submerged sea-cages with air domes reduces lice infestation, but creates production and welfare challenges
Aquaculture
548
2021
What is The Limit of Sustained Swimming in Atlantic Salmon Post smolts?
Aquaculture Environment Interactions
13
p. 189-198
2020
Heart rates of Atlantic salmon Salmo salar during a critical swim speed test and subsequent recovery
Journal of Fish Biology
2020
Fish welfare in offshore salmon aquaculture
Reviews in Aquaculture
2020
Heart rate bio-loggers as welfare indicators in Atlantic salmon (Salmo salar) aquaculture
Aquaculture
529
2020
Atlantic salmon cope in submerged cages when given access to an air dome that enables fish to maintain neutral buoyancy
Aquaculture
525
p. 1-7
2020
Genetic variation in growth pattern within a population of farmed Atlantic salmon (Salmo salar) during a standard production cycle
Aquaculture
518
2019
Welfare, behaviour and feasibility of farming Atlantic salmon in submerged cages with weekly surface access to refill their swim bladders.
Aquaculture
502
p. 332-337
2019
Sampling of Atlantic salmon Salmo salar from tanks and sea cages is size-biased
Aquaculture
502
p. 272-279
2018
Growth and welfare of submerged Atlantic salmon under continuous lighting
Aquaculture Environment Interactions
10
p. 501-510
2018
Growth and welfare of submerged Atlantic salmon under continuous lightning
Aquaculture Environment Interactions
10
p. 501-510
2018
Effects of acclimation temperature on cortisol and oxygen consumption in Atlantic salmon (Salmo salar) post-smolt exposed to acute stress
Aquaculture
497
p. 331-335
2018
Documentation of multiple species of marine fish trapped in Atlantic salmon sea-cages in Norway
Aquatic Living Resources
31
2018
Metabolic rates, swimming capabilities, thermal niche and stress response of the lumpfish, cyclopterus lumpus
Biology Open
7:bio036079
p. 1-9
2017
Consistent melanophore spot patterns allow long-term individual recognition of Atlantic salmon Salmo salar
Journal of Fish Biology
91
p. 1699-1712
2017
Habituation and conditioning in gilthead sea bream (Sparus aurata): Effects of aversive stimuli, reward and social hierarchies
Aquaculture Research
49
p. 335-340
2017
The effect of thermal acclimation on aerobic scope and critical swimming speed in Atlantic salmon Salmo salar
Journal of Experimental Biology
220
p. 2757-2764
2017
Assessing swimming capacity and schooling behaviour in farmed Atlantic salmon Salmo salar with experimental push-cages
Aquaculture
473
p. 423-429
2017
Effects of light source and intensity on sexual maturation, growth and swimming behaviour of Atlantic salmon in sea cages
Aquaculture Environment Interactions
p. 193-204
2017
Skin mucus of gilthead sea bream (sparus aurata l.). protein mapping and regulation in chronically stressed fish
Frontiers in Physiology
8:34
p. 1-18
2016
On-farm evaluation of the Salmon Welfare Index Model (SWIM 1.0) - Theoretical and practical considerations
Animal Welfare
25
p. 135-149
2016
Brain serotonergic activation in growth-stunted farmed salmon: Adaption versus pathology
Royal Society Open Science
3
2015
Effect of temperature on the metabolism, behaviour and oxygen requirements of Sparus aurata
Aquaculture Environment Interactions
7
p. 115-123
2014
Metabolic and transcriptional responses of gilthead sea bream (Sparus aurata L.) to environmental stress: New insights in fish mitochondrial phenotyping
General and Comparative Endocrinology
205
p. 305-315
2014
Coping with unpredictability: Dopaminergic and neurotrophic responses to omission of expected reward in Atlantic salmon (Salmo salar L.)
PLOS ONE
9
2014
Salmon welfare index model 2.0: an extended model for overall welfare assessment of caged Atlantic salmon, based on a review of selected welfare indicators and intended for fish health professionals
Reviews in Aquaculture
6
p. 162-179
2013
PIT tagged individual Atlantic salmon registrered at static depth positions in a sea cage: Vertical size stratification and implications for fish sampling
Aquacultural Engineering
55
p. 32-36
2013
Salmon Welfare Index Model (SWIM 1.0): a semantic model for overall welfare assessment of caged Atlantic salmon: review of the selected welfare indicators and model presentation
Reviews in Aquaculture
5
p. 33-57
2012
Sea caged Atlantic salmon display size-dependent swimming depth
Aquatic Living Resources
25
p. 143-149
2012
Food anticipatory behaviour as an indicator of stress response and recovery in Atlantic salmon post-smolt after exposure to acute temperature fluctuation
Physiology and Behavior
105
p. 350-356
2012
Duration of effects of acute environmental changes on food anticipatory behaviour, feed intake, oxygen consumption, and cortisol release in Atlantic salmon parr
Physiology and Behavior
105
p. 283-291
2012
Omission of expected reward agitates Atlantic salmon (Salmo salar)
Animal Cognition
15
p. 903-911
2012
Skirt around a salmon sea cage to reduce infestation of salmon lice resulted in low oxygen levels
Aquacultural Engineering
51
p. 21-25
2010
Habituation rate and capacity of Atlantic salmon (Salmo salar) parr to sudden transitions from darkness to light
Aquaculture
307
p. 170-172
2010
From fright to anticipation: using aversive light stimuli to investigate reward conditioning in large groups of Atlantic salmon (Salmo salar)
Aquaculture International
18
p. 991-1001
2009
Submergence of Atlantic salmon (Salmo salar L.) in commercial scale sea-cages: A potential short-term solution to poor surface conditions
Aquaculture
288
p. 254-263
Annet tidsskriftbidrag
2022
Forvirring om fisk som forsøksdyr
Forskersonen.no
2022
Skremmende tall om dyreforsøk er storm i vannglass
www.hi.no
2022
Våre dyreforsøk skal fremme fiskevelferd
Forskersonen.no
2022
Forsøksfisk for bedre dyrevelferd
www.aftenbladet.no
2022
Forsøksfisk for bedre dyrevelferd
an.no
2022
Skremmende tall om dyreforsøk er storm i vannglass
www.adressa.no
2020
Må bli flinkere på datainnsamling og standardisere
Kyst.no
Faglige foredrag
2025
Automatisk lusetelling - Kunnskapsgrunnlaget
2025
Har Vi Kunnskapsgrunnlaget For Å Etablere En God Nok Referansestandard?
2024
Fasteperioden før slakt av laks kan forkortes
2024
Standard operasjonsprosedyre (SOP) for validering av automatisk lusetelling (AutoSOP)
2024
Erfaringer med FoU-tillatelser og FHF prosjekter
2024
Vekst og velferd
2024
AutoSOP – Utvikling av referansestandard for automatisk lusetelling
2023
Seawater growth performance of Atlantic salmon (Salmo salar) smolts produced in a flow-through or recirculating aquaculture system.
2023
Seawater growth performance of Atlantic salmon (Salmo salar) smolts produced in a flow-through or recirculating aquaculture system.
2023
Biological premises for salmon offshore farming
2023
Fiskevelferds-forskning på sjøanleggene
2023
Interactions between the salmon and their sea cage rearing environment
2023
Risiko for dødelighet hos oppdrettslaks i sjøfasen
2023
Fiskens mestringsevne for eksponerte forhold
2022
Seasonal variation of feeding behaviour, appetite, growth and feed utilization through a salmon production cycle.
2022
Sesongvariasjon av fôringsatferd, appetitt, vekst og fôrutnyttelse gjennom en produksjonssyklus av laks- tidlige livsstadier påvirker fisken helt frem til slakt
2022
Nedsenkning av laks med luftkuppel fra forsøk til kommersiell drift
2022
Hva nå? Eksponert oppdrett fra et biologisk standpunkt
2022
Fordeler og ulemper med nedsenket lakseoppdrett
2022
Echofeeding
2022
Sesongvariasjon av fôringsatferd, appetitt, vekst og fôrutnyttelse gjennom en produksjonssyklus av laks- tidlige livsstadier påvirker fisken helt frem til slakt
2022
Fish welfare in new aquaculture contexts – challenges for and contributions from marine technology
2021
Vekst er mer enn kilo og gram
2021
Fish welfare in exposed farming
2021
Fish welfare implications of prolonged fasting periods in Atlantic salmon
2021
Kunnskap og teknologi i eksponert oppdrett. Effekter og behov sett fra forskningsområdene
2021
Behovene i eksponert oppdrett. Hvilke resultater har vi, hva blir utfordringene fremover og hvordan kan vi løse dem?
2021
Laksens tålegrenser for havbruk til havs
2021
Hvor mye vannstrøm tåler laks og rensefisk
2020
AI i oppdrett - Er biologisk kunnskap og praktiske hensyn ivaretatt?
2020
Merdmiljø og rensefisk – forskningsresultater og analyser
2019
Group size in fish studies matters - how many extra fish do you need?
2019
Ekkolodd, et viktig verkøty i fremtidens oppdrett
2019
Use of Copernicus data in present and future aquaculture?
2019
Varige effekter av forbedret hjertehelse hos laksesmolt
2019
Kan fiskevelferd sikres langt til havs?
2018
Feasibility of reducing lice infestations on farmed salmon using an airdome for swim bladder refilling during continuous submergence.
2018
Fôringsstrategi og Echofeeding
2018
The use of swim tunnel studies in defining environmental thresholds for Atlantic salmon and cleanerfish in exposed Aquaculture
2018
Bruk av undervanns luftkuppel for oppdrett av laks i nedsenkte merder
2017
Hvilke velferdsindikatorer skal brukes i ulike anleggskonsepter for lakseoppdrett?
2017
La laksen fôre "seg selv"!
2017
Vekst hos laksesøsken
2017
DO DIFFERENT GENES CONTROL SUMMER AND WINTER GROWTH IN ATLANTIC SALMON (Salmo salar)?
2017
SAMPLING OF ALTANTIC SALMON (Salmo salar) FROM TANKS AND SEA CAGES IS SIZE-BIASED
2017
Thresholds for hypoxia and water current in salmon production
2017
Velferdsindikatorer for laks og regnbueørret (FISHWELL)
2016
Premisser for merdteknologi – lytter vi til "brukerens" krav til vannstrøm for god vekst og velferd på eksponerte lokaliteter?
2016
Er atferd hos oppdrettslaks familieavhengig?
2016
Hva er akseptabel vannstrøm for laks i merder?
2016
Passe store grupper: Balanse mellom Reduction og Refinement i forsøk med laks
2015
Fôring og fødemotivasjon sin påvirkning av svømmedyp.
2014
Svakt lys holder laksen dypt, sterkt lys gir best vekst.
2014
Use of artificial light (LL) to prevent sexual maturation and increase growth in salmon sea cages.
2014
Hypoksi i lakseoppdrett - Praktiske konsekvenser.
2014
Use of artificial light (LL) to prevent sexual maturation and increase growth in salmon sea cages.
2014
Responses of caged salmon to farm environment.
2012
Effects of omission of expected reward on agonistic behaviour and dopaminergic activity of Atlantic salmon (Salmo salar)
2012
Frustrert fisk: Uforutsigbar utforing av laks gir økt aggresjon og påvirker hjernens belønnings-system
2011
SWIM - Salmon welfare index model
2011
Overall Welfare Assessment of Atlantic Salmon in Sea Cages - SWIM 1.0
Poster
2021
Submerged salmon production reduced lice infestation but deep environmental challenges occurred
2017
ARE SWIMMING DEPTH PREFERENCES IN FARMED ATLANTIC SALMON GENETICALLY DEPENDENT?
2012
Topical delousing in sea cages – salmon behaviour, water movements and therapeutant mixing
2012
Omission of expected reward sensitizes the brain dopaminergic system of classically conditioned Atlantic salmon
Rapporter og avhandlinger
2025
Velferd til laks i nyere produksjonsteknologi mot lus – forundersøkelse
Rapport fra havforskningen
2025
Risikorapport norsk fiskeoppdrett 2025 - Produksjonsdødelighet hos oppdrettsfisk og miljøeffekter av norsk fiskeoppdrett
Rapport fra havforskningen
2024
Standardisation of manual louse counts for validation of automatic camera systems - Final report (FHF project 901881)
Rapport fra havforskningen
2024
Standard operasjonsprosedyre for manuell lusetelling til validering av automatisk telling
Rapport fra havforskningen
2024
Safe, robust, and productive Exposed Aquaculture Operations - Challenges and solutions
2024
Safe, robust, and productive Exposed Aquaculture Operations - Challenges and solutions
2024
Risikorapport norsk fiskeoppdrett 2024 - Produksjonsdødelighet hos oppdrettsfisk og miljøeffekter av norsk fiskeoppdrett
Rapport fra havforskningen
2019
Havbasert oppdrett – hvor mye vannstrøm tåler laks og rensefisk? - fiskevelferd og grenseverdier
2019
Physiology and welfare of Atlantic salmon and cleaner fish in exposed aquaculture
2006
Effects of group size and light regime on swimming depth and social interactions of individual Atlantic salmon (Salmo salar L.) in a sea cage
Nettrapporter
Nettrapporter
- Velferd til laks i nyere produksjonsteknologi mot lus – forundersøkelse
- Risikorapport norsk fiskeoppdrett 2025
- Standardisation of manual louse counts for validation of automatic camera systems
- Standard operasjonsprosedyre for manuell lusetelling til validering av automatisk telling
- Risikorapport norsk fiskeoppdrett 2024
- Havbasert oppdrett – hvor mye vannstrøm tåler laks og rensefisk?
Nyheter
Nyheter
- (09.01.2025) Ny veileder skal gi riktige lusetall
- (14.10.2024) Miljøet avgjør om nedsenkbare merder er bra
- (07.02.2023) Fortsatt høy dødelighet hos oppdrettslaks
- (15.09.2022) Ekkolodd gir beskjed når oppdrettsfisken er mett
- (08.09.2022) Skremmende tall om dyreforsøk er storm i vannglass
- (19.04.2022) Oppdrettsanlegg opptar større havområder enn før
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