Browsing Brage IMR by Author "Karlsen, Ørjan"
Now showing items 1-20 of 137
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1H NMR metabolic profiling of cod (Gadus morhua) larvae: potential effects of temperature and diet composition during early developmental stages
Chauton, Matilde Skogen; Galloway, Trine Falck; Kjørsvik, Elin; Størseth, Trond Røvik; Puvanendran, Velmurugu; van der Meeren, Terje; Karlsen, Ørjan; Rønnestad, Ivar; Hamre, Kristin (Journal article; Peer reviewed, 2015-11-06)Marine aquaculture offers a great source of protein for the increasing human population, and farming of, for example, Atlantic salmon is a global industry. Atlantic cod farming however, is an example of a promising industry ... -
A gap analysis on modelling of sea lice infection pressure from salmonid farms. II. Identifying and ranking knowledge gaps: output of an international workshop
Murphy, Joanne M.; Moriarty, Meadhbh; Brooker, Adam J.; Waites, William; Revie, Crawford W.; Adams, Thomas P.; Lewis, Matt; Reinardy, Helena Christine; Phelan, John P.; Coyle, Johnny P.; Rabe, Berit; Ives, Stephen C.; Armstrong, John D.; Sandvik, Anne Dagrun; Asplin, Lars; Karlsen, Ørjan; Garnier, Soizic; Norði, Gunnvør á; Gillibrand, Philip A.; Last, Kim S.; Murray, Alexander G. (Peer reviewed; Journal article, 2024)Sea lice are a major health hazard for farmed Atlantic salmon in Europe, and their impact is felt globally. Given the breadth of ongoing research in sea lice dispersal and population modelling, and focus on research-led ... -
AkvaVis - dynamisk GIS-verktøy for lokalisering av oppdrettsanlegg for nye oppdrettsarter : miljøkrav for nye oppdrettsarter og laks
Ervik, Arne; Agnalt, Ann-Lisbeth; Asplin, Lars; Aure, Jan; Bekkvik, Tor Christian; Døskeland, Inge; Hageberg, Anne Ansnes; Hansen, Tom; Karlsen, Ørjan; Oppedal, Frode; Strand, Øivind (Fisken og havet, Research report, 2008)AkvaVis is a dynamic GIS tool for siting fish farms, and this report describes a prototype version for mussel farms. AkvaVis combines mappable characteristics such as depth, currents and distance from other objects, and ... -
Annual report on health monitoring of wild anadromous salmonids in Norway 2017
Madhun, Abdullah Sami; Skaala, Øystein; Nilsen, Rune; Serra-Llinares, Rosa Maria; Elvik, Kristine Marit Schrøder; Bjørn, Pål Arne; Karlsen, Ørjan; Svåsand, Terje; Karlsbakk, Egil (Rapport fra havforskningen;26-2018, Research report, 2018)Svært få funn av virus i tilbakevandrende laks selv om de samme virusene er vanlige i oppdrett Havforskningsinstituttet har undersøkt forekomsten av flere virus som er prevalent i oppdrett i tilbakevandrende laks fra ... -
Annual report on health monitoring of wild anadromous salmonids in Norway 2018 - Screening of migrating Atlantic salmon (Salmo salar) postsmolts from the Trondheim fjord for viral infections
Madhun, Abdullah Sami; Karlsen, Ørjan; Karlsbakk, Egil (Rapport fra havforskningen;2019 - 28, Research report, 2019)Very few virus infections found in migrating postsmolts from the Trondheim Fjord Commissioned by the Norwegian Food Safety Authority, the Institute of Marine Research has studied the occurrence of several potential ... -
Annual report on health monitoring of wild anadromous salmonids in Norway 2019: Screening of Atlantic salmon (Salmo salar) smolts for viral infections
Madhun, Abdullah Sami; Wennevik, Vidar; Utne, Kjell Rong; Karlsen, Ørjan; Kvamme, Bjørn Olav; Karlsbakk, Egil (Rapport fra havforskningen;2020 - 16, Research report, 2020) -
Annual report on health monitoring of wild anadromous salmonids in Norway 2020 - Screening of wild Atlantic salmon (Salmo salar) postsmolts for viral infections
Madhun, Abdullah Sami; Karlsen, Ørjan; Nilsen, Rune; Kvamme, Bjørn Olav (Rapport fra havforskningen;2021 - 19, Research report, 2021)The Institute of Marine Research has investigated the prevalence of infectious salmon anaemia virus (ISAV) and salmonid alphavirus (SAV, PD-virus) infections in migrating wild Atlantic salmon postsmolts captured in 2019 ... -
Annual report on health monitoring of wild anadromous salmonids in Norway 2021 - Screening of Atlantic salmon (Salmo salar) postsmolts for viral infections
Madhun, Abdullah Sami; Karlsen, Ørjan; Nilsen, Rune; Kvamme, Bjørn Olav (Rapport fra havforskningen;2022 - 6, Research report, 2022)Havforskningsinstituttet har undersøkt utbredelsen av infeksiøs lakseanemi virus (ILAV) og salmonid alfavirus (SAV, PD-virus) infeksjoner i utvandrende vill atlantisk postsmolt fanget i 2020 i tre fjordsystemer lokalisert ... -
Annual report on health monitoring of wild anadromous salmonids in Norway 2022 - Screening of Atlantic salmon (Salmo salar) postsmolts from Boknafjorden, Hardangerfjorden and Romsdalsfjorden for viral infections
Madhun, Abdullah Sami; Karlsen, Ørjan; Nilsen, Rune; Kvamme, Bjørn Olav (Rapport fra havforskningen;2023 - 41, Research report, 2023)The Institute of Marine Research has investigated the prevalence of infectious salmon anaemia virus (ISAV), salmonid alphavirus (SAV, PD-virus), piscine orthoreovirus 1 (PRV-1), piscine myocarditis virus (PMCV) and infectious ... -
Annual report on health monitoring of wild anadromous salmonids in Norway 2023 - Screening of Atlantic salmon postsmolts from Boknafjorden and Hardangerfjorden and sea trout from Hitra for pathogen infections
Madhun, Abdullah Sami; Karlsen, Ørjan; Nilsen, Rune (Rapport fra havforskningen;2024 - 13, Research report, 2024)The Institute of Marine Research has investigated the prevalence of infectious salmon anemia virus (ISAV), salmonid alphavirus (SAV, PD virus), piscine orthoreovirus 1 (PRV-1), piscine myocarditis virus (PMCV) and bacterial ... -
Attraction of cod Gadus morhua from coastal spawning grounds to salmon farms
Skjæraasen, Jon Egil; Karlsen, Ørjan; Langangen, Øystein Ole Gahr; Meier, Sonnich; Dunlop, Katherine Mary; van der Meeren, Terje; Keeley, Nigel B.; Myksvoll, Mari Skuggedal; Dahle, Geir; Moland, Even; Nilsen, Rune; Elvik, Kristine Marit Schrøder; Bannister, Raymond; Olsen, Esben Moland (Peer reviewed; Journal article, 2022)Wild fish aggregate at aquaculture net-pens, but the underlying mechanisms are not fully understood. This study examined how salmon farms attract coastal Atlantic cod Gadus morhua from their inshore spawning grounds. ... -
Attraction of cod Gadus morhua from coastal spawning grounds to salmon farms
Skjæraasen, Jon Egil; Karlsen, Ørjan; Langangen, Øystein Ole Gahr; Meier, Sonnich; Dunlop, Katherine Mary; van der Meeren, Terje; Keeley, Nigel B.; Myksvoll, Mari Skuggedal; Dahle, Geir; Moland, Even; Nilsen, Rune; Elvik, Kristine Marit Schrøder; Bannister, Raymond; Olsen, Esben Moland (Peer reviewed; Journal article, 2022)Wild fish aggregate at aquaculture net-pens, but the underlying mechanisms are not fully understood. This study examined how salmon farms attract coastal Atlantic cod Gadus morhua from their inshore spawning grounds. ... -
Behavioural responses of wild, spawning Atlantic cod (Gadus morhua L.) to seismic airgun exposure
McQueen, Kate; Skjæraasen, Jon Egil; Nyqvist, D; Olsen, Esben Moland; Karlsen, Ørjan; Meager, Justin James; Kvadsheim, Petter Helgevold; Handegard, Nils Olav; Forland, Tonje Nesse; de Jong, Karen; Sivle, Lise Doksæter (Peer reviewed; Journal article, 2023)Seismic airgun surveys to map petroleum deposits in the seabed may impact behaviour of marine animals over large distances. Understanding whether fish spawning behaviour is affected by this anthropogenic noise source is ... -
Continuous sound from a marine vibrator causes behavioural responses of free-ranging, spawning Atlantic cod (Gadus morhua)
McQueen, Kate; Sivle, Lise Doksæter; Forland, Tonje Nesse; Meager, Justin James; Skjæraasen, Jon Egil; Olsen, Esben Moland; Karlsen, Ørjan; Kvadsheim, Petter Helgevold; de Jong, Karen (Peer reviewed; Journal article, 2024)Marine vibrators are a new technology being developed for seismic surveys. These devices can transmit continuous instead of impulsive sound and operate over a narrower frequency band and at lower peak pressure than airguns, ... -
Copepod production in a saltwater pond system: A reliable method for achievement of natural prey in start-feeding of marine fish larvae
van der Meeren, Terje; Karlsen, Ørjan; Liebig, Penny Lee; Magnor-Jensen, Anders (Journal article; Peer reviewed, 2014-07-23)A high-latitude seawater pond system was restarted after 10 years absence of controlled biological production. Water supply systems for emptying and refilling the 25,000 m3 pond were installed along with a wheel filter ... -
Copepods enhance nutritional status, growth and development in Atlantic cod (Gadus morhua L.) larvae – can we identify the underlying factors?
Karlsen, Ørjan; van der Meeren, Terje; Rønnestad, Ivar; Mangor-Jensen, Anders; Galloway, Trine Falck; Kjørsvik, Elin; Hamre, Kristin (Journal article; Peer reviewed, 2015-05-19)The current commercial production protocols for Atlantic cod depend on enriched rotifers and Artemia during first-feeding, but development and growth remain inferior to fish fed natural zooplankton. Two experiments were ... -
Crude oil exposure of early life stages of Atlantic haddock suggests threshold levels for developmental toxicity as low as 0.1 μg total polyaromatic hydrocarbon (TPAH)/L
Sørhus, Elin; Sørensen, Lisbet; Grøsvik, Bjørn Einar; Le Goff, Jérémie; Incardona, John P.; Linbo, Tiffany; Baldwin, David; Karlsen, Ørjan; Nordtug, Trond; Hansen, Bjørn Henrik; Thorsen, Anders; Donald, Carey; van der Meeren, Terje; Robson, William; Rowland, Steven J.; Rasinger, Josef; Vikebø, Frode Bendiksen; Meier, Sonnich (Peer reviewed; Journal article, 2023)Atlantic haddock (Melanogrammus aeglefinus) embryos bind dispersed crude oil droplets to the eggshell and are consequently highly susceptible to toxicity from spilled oil. We established thresholds for developmental toxicity ... -
Crude oil exposures reveal roles for intracellular calcium cycling in haddock craniofacial and cardiac development
Sørhus, Elin; Incardona, John P.; Karlsen, Ørjan; Linbo, Tiffany; Sørensen, Lisbet; Nordtug, Trond; van der Meeren, Terje; Thorsen, Anders; Thorbjørnsen, Maja; Jentoft, Sissel; Edvardsen, Rolf; Meier, Sonnich (Journal article; Peer reviewed, 2016-08-10)Recent studies have shown that crude oil exposure affects cardiac development in fish by disrupting excitation-contraction (EC) coupling. We previously found that eggs of Atlantic haddock (Melanogrammus aeglefinus) bind ... -
Development of a risk assessment for sea trout in coastal areas exploited for aquaculture
Finstad, Bengt; Sandvik, Anne Dagrun; Ugedal, Ola; Vollset, Knut; Karlsen, Ørjan; Davidsen, Jan Grimsrud; Sægrov, Harald; Lennox, Robert J. (Peer reviewed; Journal article, 2021)The regulation of aquaculture production in Norway considers the potential impact of salmon lice on wild fish. However, most attention has been focused on impacts on wild Atlantic salmon, despite the fact that anadromous ... -
The development of a sustainability assessment indicator and its response to management changes as derived from salmon lice dispersal modelling
Sandvik, Anne Dagrun; Bui, Samantha; Huserbråten, Mats Brockstedt Olsen; Karlsen, Ørjan; Myksvoll, Mari Skuggedal; Ådlandsvik, Bjørn; Johnsen, Ingrid Askeland (Peer reviewed; Journal article, 2021)Aquaculture is providing an increasingly larger proportion of the world’s protein for human consumption; however, its environmental impact is a bottleneck for sustainable expansion. In Norway, the government has enacted a ...