Blar i Brage IMR på forfatter "Oppedal, Frode"
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Effects of light source and intensity on sexual maturation, growth and swimming behaviour of Atlantic salmon in sea cages
Hansen, Tom Johnny; Fjelldal, Per Gunnar; Folkedal, Ole; Vågseth, Tone; Oppedal, Frode (Peer reviewed; Journal article, 2017) -
Effects of step salinity gradients on salmon lice larvae behaviour and dispersal
Crosbie, Thomas; Wright, Daniel William; Oppedal, Frode; Johnsen, Ingrid Askeland; Samsing, Fransisca; Dempster, Timothy (Peer reviewed; Journal article, 2019)In trying to deal with the problematic salmon louse Lepeophtheirus salmonis in salmon aquaculture, strategies to better prevent infestations are gaining traction. Successful prevention requires an accurate understanding ... -
Efficacy of salmon lice prevention via snorkel technology depends upon salinity at the farm site, with minimal effects on salmon production and welfare
Oppedal, Frode; Bui, Samantha; Overton, Kathy; Stien, Lars Helge; Dempster, Tim (Journal article; Peer reviewed, 2019)Sea lice are a critical health issue in most salmonid farming regions. New cage-based technologies can prevent infestations from occurring, such as the ‘snorkel’, which introduces an impermeable barrier that separates ... -
Efficiency and welfare impact of long-term simultaneous in situ management strategies for salmon louse reduction in commercial sea cages
Bui, Samantha; Nilsson, Jonatan; Stien, Lars Helge; Trengereid, Henrik; Oppedal, Frode (Peer reviewed; Journal article, 2020)The Atlantic salmon (Salmo salar) aquaculture industry is faced with an obstacle in sustainability with increasing production, which is the control and prevention of the ectoparasitic salmon louse Lepeophtheirus salmonis. ... -
Ein "gladare" laks i kunstig lys?
Oppedal, Frode (Havforskningsnytt, Working paper, 1998) -
Environmental drivers of Atlantic salmon behaviour in sea-cages: a review
Oppedal, Frode; Dempster, Tim; Stien, Lars Helge (Journal article; Peer reviewed, 2011-02-03)Salmon may sense and respond to a range of environmental variables within sea-cages, including light, temperature, salinity, dissolved oxygen, water currents and certain chemical treatments used during production. Environments ... -
Environmental drivers of Atlantic salmon behaviour in sea-cages: a review
Oppedal, Frode; Dempster, Tim; Stien, Lars Helge (Journal article; Peer reviewed, 2011-02-03)Salmon may sense and respond to a range of environmental variables within sea-cages, including light, temperature, salinity, dissolved oxygen, water currents and certain chemical treatments used during production. Environments ... -
Environmentally responsive parasite prevention halves salmon louse burden in commercial marine cages
Oldham, Tina Marie Wier; Simensen, Benedicte; Trengereid, Henrik; Oppedal, Frode (Peer reviewed; Journal article, 2023)Though a naturally occurring species throughout the Atlantic, parasitic salmon louse (Lepeophtheirus salmonis) population dynamics are increasingly intertwined with salmonid aquaculture. In contrast to reactive louse ... -
Farmed salmonids drive the abundance, ecology and evolution of parasitic salmon lice in Norway
Dempster, Tim; Overton, Kathy; Bui, Samantha; Stien, Lars Helge; Oppedal, Frode; Karlsen, Ørjan; Coates, Andrew; Phillips, B. L.; Barrett, Luke T. (Peer reviewed; Journal article, 2021)Sea cage fish farming is typically open to the environment, with disease transmission possible between farmed and wild hosts. In salmonid aquaculture, salmon louse Lepeophtheirus salmonis infestations cause production ... -
Fast currents reduce production performance of post-smolt Atlantic salmon.
Solstorm, Frida; Solstorm, David; Oppedal, Frode; Fernø, Anders; Fraser, Thomas; Olsen, Rolf Erik (Journal article; Peer reviewed, 2015-09-17)In the future, an increasing number of salmon farms may be located in areas with fast water current velocity due to limited availability of more sheltered locations. However, there is little information as to how fast ... -
Fasting and its implications for fish welfare in Atlantic salmon aquaculture
Hvas, Malthe; Kolarevic, Jelena; Noble, Christopher; Oppedal, Frode; Stien, Lars Helge (Peer reviewed; Journal article, 2024)Periods of fasting occur for a multitude of reasons in Atlantic salmon aquaculture. Feed withdrawal is widely used prior to transport, parasite treatments, preslaughter and for depuration purposes in recirculating aquaculture ... -
Får oppdrettslaks nok oksygen?
Remen, Mette; Oppedal, Frode; Stien, Lars Helge; Torgersen, Thomas; Olsen, Rolf Erik (Havforskningstema;1-2013, Working paper, 2013) -
Feed utilisation in Atlantic salmon kept at fluctuating oxygen saturation. A CREATE project
Aas, Turid Synnøve; Remen, Mette; Oppedal, Frode; Hjertnes, Tor Johannes (Nofima rapportserie, Research report, 2011)Atlantic salmon (initial weight 383 g) was kept at either stable oxygen saturation (>80%, control) or exposed to four daily drops in oxygen saturation to 70, 60 or 50% in a 68-days experiment. The fish was fed twice daily ... -
Finding the needle in the haystack: Comparison of methods for salmon louse enumeration in plankton samples
Bui, Samantha; Dalvin, Sussie; Vågseth, Tone; Oppedal, Frode; Fossøy, Frode; Brandsegg, Hege; Jacobsen, Ása; Nordi, Gunnvør á; Fordyce, Mark; Michelsen, Helena Kling; Finstad, Bengt; Skern-Mauritzen, Rasmus (Peer reviewed; Journal article, 2021)The economic and social implications of salmon louse (Lepeophtheirus salmonis) epidemics in salmon aquaculture drive focus of the dispersal dynamics of the planktonic larval stages. The vast spatial scale and high connectivity ... -
Fish welfare based classification method of ocean current speeds at aquaculture sites
Jónsdóttir, Kristbjörg Edda; Hvas, Malthe; Alfredsen, Jo Arve; Føre, Martin; Alver, Morten; Bjelland, Hans Vanhauwaert; Oppedal, Frode (Journal article; Peer reviewed, 2019)A major trend in marine aquaculture is to move production to more exposed sites with occasionally rough ocean current events. However, it is unclear whether fish will thrive in these extreme environments, since thorough ... -
Fish welfare in offshore salmon aquaculture
Hvas, Malthe; Folkedal, Ole; Oppedal, Frode (Peer reviewed; Journal article, 2020)To accommodate further growth in the Atlantic salmon aquaculture industry, new production sites may well be established at more exposed locations along the coast or even offshore. Here, fish will encounter strong currents ... -
FLOXY - Merdlengde, fisketetthet og oksygen
Aure, Jan; Oppedal, Frode (Lecture, 2010-11-04) -
FLOXY - Merdlengde, fisketetthet og oksygen
Aure, Jan; Oppedal, Frode (Lecture, 2010-11-04) -
Fluctuating sea-cage environments modify the effects of stocking densities on production and welfare parameters of Atlantic salmon (Salmo salar L.)
Oppedal, Frode; Vågseth, Tone; Dempster, Tim; Juell, Jon-Erik; Johansson, David (Journal article; Peer reviewed, 2011-05-21)Stocking densities are commonly used to set limits for the production of fish in sea-cages, yet limited information exists to assess how environmental fluctuations modify the effects of stocking densities on the production ... -
Fluctuating sea-cage environments modify the effects of stocking densities on production and welfare parameters of Atlantic salmon (Salmo salar L.)
Oppedal, Frode; Vågseth, Tone; Dempster, Tim; Juell, Jon-Erik; Johansson, David (Journal article; Peer reviewed, 2011-05-21)Stocking densities are commonly used to set limits for the production of fish in sea-cages, yet limited information exists to assess how environmental fluctuations modify the effects of stocking densities on the production ...