Search Results - "Stien, L. H."

Farmed salmonids drive the abundance, ecology and evolution of parasitic salmon lice in Norway by Dempster, T, Overton, K, Bui, S, Stien, LH, Oppedal, F, Karlsen, Ø, Coates, A, Phillips, BL, Barrett, LT

“…Sea cage fish farming is typically open to the environment, with disease transmission possible between farmed and wild hosts. In salmonid aquaculture, salmon…”
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Manipulation of farmed Atlantic salmon swimming behaviour through the adjustment of lighting and feeding regimes as a tool for salmon lice control by Frenzl, B., Stien, L.H., Cockerill, D., Oppedal, F., Richards, R.H., Shinn, A.P., Bron, J.E., Migaud, H.

“…This paper describes a study in which environmental manipulation of salmon swimming depth was tested in an attempt to reduce farm infection of Atlantic salmon,…”
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Effects of age and rearing environment on genetic parameters of growth and body weight and heritability of skin pigmentation in Arctic charr (Salvelinus alpinus L.) by Nilsson, J., Backström, T., Stien, L.H., Carlberg, H., Jeuthe, H., Magnhagen, C., Brännäs, E.

“…The Swedish breeding programme for Arctic charr aims to improve traits that are important for farming. Selection has been ongoing since the 1980s, and the aim…”
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Exsanguination of Turbot and the Effect on Fillet Quality Measured Mechanically, by Sensory Evaluation, and with Computer Vision by Roth, B., Schelvis-Smit, R., Stien, L.H., Foss, A., Nortvedt, R., Imsland, A.

“…In order to investigate the impact of blood residues on the end quality of exsanguinated and unbled farmed turbot (Scophthalmus maximus), meat quality was…”
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‘Snorkel’ lice barrier technology reduced two co- occurring parasites, the salmon louse (Lepeophtheirus salmonis) and the amoebic gill disease causing agent (Neoparamoeba perurans), in commercial salmon sea-cages by Wright, D.W., Stien, L.H., Dempster, T., Vågseth, T., Nola, V., Fosseidengen, J.-E., Oppedal, F.

“…•Use of snorkel technology in full-scale commercial salmon farms was assessed.•Lice infestations were lowered in snorkel cages compared to standard…”
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Consistent melanophore spot patterns allow long‐term individual recognition of Atlantic salmon Salmo salar by Stien, L. H., Nilsson, J., Bui, S., Fosseidengen, J. E., Kristiansen, T. S., Øverli, Ø., Folkedal, O.

“…The present study shows that permanent melanophore spot patterns in Atlantic salmon Salmo salar make it possible to use images of the operculum to keep track…”
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Distinguishing Arctic charr with different stress coping styles by visual screening of spottiness - reliability and consistency over time by Brännäs, E., Backström, T., Nilsson, J., Carlberg, H., Stien, L. H., Magnhagen, C.

“…The salmonid fish Arctic charr Salvelinus alpinus shows pronounced individual variation in skin colouration and density of carotenoid‐based spots. It has…”
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Optimal estimation of lice release from aquaculture based on ambient temperatures by Johnsen, Ingrid Askeland, Stien, Lars Helge, Sandvik, Anne Dagrun, Asplin, Lars, Oppedal, Frode

“…Models for mapping and forecasting infective pressure from salmon louse Lepeophtheirus salmonis larvae are of major importance in the Norwegian government's…”
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Not too slow, not too fast: water currents affect group structure, aggression and welfare in post-smolt Atlantic salmon Salmo salar by Solstorm, Frida, Solstorm, David, Oppedal, Frode, Olsen, Rolf Erik, Stien, Lars Helge, Fernö, Anders

“…Increased swimming speed of Atlantic salmon is generally considered an improvement to welfare under aquaculture settings, as group structure is improved and…”
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Atlantic salmon Salmo salar instantaneously follow vertical light movements in sea cages by Wright, Daniel W., Glaropoulos, Alexis, Solstorm, David, Stien, Lars H., Oppedal, Frode

“…Atlantic salmon in marine farming environments are exposed to potentially detrimental conditions through space and time. For instance, the vertical…”
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Efficiency of salmon production in submerged cages with air domes matches standard surface cages when environments are similar by Warren-Myers, F., Folkedal, O., Vågseth, T., Stien, L.H., Fosse, J.O., Dempster, T., Oppedal, F.

“…Submerged cage technology may enable placement of salmon farms at more exposed sites whilst avoiding the impacts of damaging weather on farm structures. Field…”
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Atlantic salmon cope in submerged cages when given access to an air dome that enables fish to maintain neutral buoyancy by Oppedal, F., Folkedal, O., Stien, L.H., Vågseth, T., Fosse, J.O., Dempster, T., Warren-Myers, F.

“…Salmon lice, Lepeophtheirus salmonis are a financial and fish welfare issue for the salmon aquaculture industry. Avoiding the planktonic, mostly…”
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Deployment of hydroacoustic feeding control in salmon sea-cages; biological and technical considerations by Folkedal, O., Macaulay, G., Fosseidengen, J.E., Mikkelsen, G., Myrland, J., Søvegjarto, B., Klepaker, T.O., Fernö, A., Dempster, T., Oppedal, F., Stien, L.H.

“…Automation of feeding control for sea-caged Atlantic salmon is important to reduce waste feed. Hydroacoustic appetite-led feeding, or echofeeding, uses echo…”
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Does the thermal component of warm water treatment inflict acute lesions on Atlantic salmon (Salmo salar)? by Moltumyr, L., Gismervik, K., Gu, J., Gåsnes, S.K., Kristiansen, T.S., Rønnestad, I., Nilsson, J., Stien, L.H.

“…Warm water treatment, i.e. exposure to sea water at a temperature of 28–34 °C for 20–30 s, has in recent years been widely used for delousing of Atlantic…”
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A video analysis procedure for assessing vertical fish distribution in aquaculture tanks by Stien, Lars Helge, Bratland, Silje, Austevoll, Ivar, Oppedal, Frode, Kristiansen, Tore S.

“…This paper describes an economical and efficient video analysis procedure for registering vertical fish distribution in aquaculture tanks. The procedure can be…”
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Snorkel technology to reduce sea lice infestations: efficacy depends on salinity at the farm site, but snorkels have minimal effects on salmon production and welfare by Oppedal, Frode, Bui, Samantha, Stien, Lars H., Overton, Kathy, Dempster, Tim

“…Sea lice are a critical health issue in most salmonid farming regions. New cage-based technologies can prevent infestations from occurring, such as the…”
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Towards cod without spawning: artificial continuous light in submerged sea-cages maintains growth and delays sexual maturation for farmed Atlantic cod Gadus morhua by Korsoeen, OeJ, Dempster, T, Fosseidengen, JE, Karlsen, Oe, Oppedal, F, Stien, L H, Kristiansen, T S

“…Sexual maturation and spawning in sea-cages is a major production and environmental challenge for the Atlantic cod farming industry. Altered photoperiod has…”
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Image analysis as a tool to facilitate selective breeding of quality traits in rainbow trout by Kause, A., Stien, L.H., Rungruangsak-Torrissen, K., Ritola, O., Ruohonen, K., Kiessling, A.

“…A quantitative genetic analysis was performed to assess the suitability of automated image analysis of cutlets as a selection tool to genetically improve flesh…”
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Surface environment modification in Atlantic salmon sea-cages: effects on amoebic gill disease, salmon lice, growth and welfare by Wright, Daniel W., Geitung, Lena, Karlsbakk, Egil, Stien, Lars H., Dempster, Tim, Oldham, Tina, Nola, Velimir, Oppedal, Frode

“…Surface environment modification is a potential parasite control strategy in Atlantic salmon sea-cage farming. For instance, a temporary low salinity surface…”
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effects of stress and storage temperature on the colour and texture of pre-rigor filleted farmed cod (Gadus morhua L.) by Stien, L.H, Hirmas, E, Bjornevik, M, Karlsen, O, Nortvedt, R, Rora, A.M.B, Sunde, J, Kiessling, A

“…This experiment deals with the effects of pre-slaughter stress and storage temperature on muscle pH, fillet contraction, colour and texture in pre-rigor…”
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