Blar i Brage IMR på forfatter "Bjørn, Pål Arne"
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Annual report on health monitoring of wild anadromous salmonids in Norway
Biering, Eirik; Madhun, Abdullah Sami; Isachsen, Cecilie Helen; Omdal, Linn Maren; Einen, Ann Cathrine Bårdsgjære; Garseth, Åse Helen; Bjørn, Pål Arne; Nilsen, Rune; Karlsbakk, Egil (Rapport fra Havforskningen;Nr. 6-2013, Working paper, 2013-03-01) -
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 ... -
Aquaculture-driven evolution: distribution of pyrethroid resistance in the salmon louse throughout the North Atlantic in the years 2000–2017
Fjørtoft, Helene Børretzen; Nilsen, Frank; Besnier, Francois; Espedal, Per Gunnar; Stene, Anne; Tveten, Ann-Kristin; Bjørn, Pål Arne; Aspehaug, Vidar; Glover, Kevin (Peer reviewed; Journal article, 2020)The parasitic salmon louse, and its documented resistance to chemotherapeutants, represents the most persistent environmental challenge to global salmonid aquaculture. We used a genetic marker associated with pyrethroid ... -
Area protection may reduce salmon louse infection risk to wild salmonids
Bjørn, Pål Arne; Sivertsgård, Rolf; Finstad, Bengt; Nilsen, Rune; Serra-Llinares, Rosa Maria; Kristoffersen, Roar (Peer reviewed; Journal article, 2011) -
Coastal salmon farms attract large and persistent aggregations of wild fish: an ecosystem effect
Dempster, Tim; Uglem, Ingebrigt; Sanchez-Jerez, P.; Fernandez-Jover, D.; Bayle-Sempere, J. T.; Nilsen, Rune; Bjørn, Pål Arne (Journal article; Peer reviewed, 2009-06-18)Coastal aquaculture is a globally expanding enterprise. Currently, 1200 salmon farms operate in coastal Norway, yet their capacity to aggregate and subsequently modify wild fish distributions is poorly known. Aggregations ... -
Disease interaction and pathogens exchange between wild and farmed fish populations with special reference to Norway
Johansen, Lill-Heidi; Jensen, Ingvill; Mikkelsen, Helene; Bjørn, Pål Arne; Jansen, P.A.; Bergh, Øivind (Journal article; Peer reviewed, 2011-05-21)Norway has the largest salmon-farming industry in the world, an industry that is still growing, and in recent years production of marine species like Atlantic cod has also increased. At the same time, Norway has the world's ... -
Disease interaction and pathogens exchange between wild and farmed fish populations with special reference to Norway
Johansen, Lill-Heidi; Jensen, Ingvill; Mikkelsen, Helene; Bjørn, Pål Arne; Jansen, P.A.; Bergh, Øivind (Journal article; Peer reviewed, 2011-05-21)Norway has the largest salmon-farming industry in the world, an industry that is still growing, and in recent years production of marine species like Atlantic cod has also increased. At the same time, Norway has the world's ... -
Disease interaction and pathogens exchange between wild and farmed fish populations with special reference to Norway
Johansen, Lill-Heidi; Jensen, Ingvill; Mikkelsen, Helene; Bjørn, Pål Arne; Jansen, P.A.; Bergh, Øivind (Journal article; Peer reviewed, 2011-05-21)Norway has the largest salmon-farming industry in the world, an industry that is still growing, and in recent years production of marine species like Atlantic cod has also increased. At the same time, Norway has the world's ... -
Efectos del piojo del salmón Lepeophtheirus salmonis(Copepoda: Caligidae) en las poblaciones de truchas (Salmo trutta) de la costa NE Atlántica
Lopez, Pablo Arachavala; Thorstad, Eva Bonsak; Todd, Christopher D.; Uglem, Ingebrigt; Bjørn, Pål Arne; Gargan, Patrick G.; Vollset, Knut Wiik; Halttunen, Elina; Kålås, Steinar; Berg, Marius; Finstad, Bengt (Peer reviewed; Journal article, 2015)Salmon lice are external parasites on salmonids in the marine environment. During recent years, sea lice abundance has been increased due to the presence of salmon farming using on-growing floating seas-cages. Amongst ... -
Effects of salmon lice infection on the behaviour of sea trout in the marine phase
Gjelland, Karl Øystein; Serra-Llinares, Rosa Maria; Hedger, Richard David; Arechavala-Lopez, Pablo; Nilsen, Rune; Finstad, Bengt; Uglem, Ingebrigt; Skilbrei, Ove; Bjørn, Pål Arne (Journal article; Peer reviewed, 2014-07-09)Salmon lice Lepeophtheirus salmonis Krøyer may affect survival and growth of anadromous salmonids through physiological stress and/or behavioural changes. Using acoustic telemetry tracking, we investigated the behaviour ... -
Effects of salmon lice Lepeophtheirus salmonis onwild sea trout Salmo trutta—a literature review
Thorstad, Eva Bonsak; Todd, Christopher D.; Uglem, Ingebrigt; Bjørn, Pål Arne; Gargan, Patrick G.; Vollset, Knut Wiik; Halttunen, Elina; Kålås, Steinar; Berg, Marius; Finstad, Bengt (Journal article; Peer reviewed, 2015-08-20)Salmon farming increases the abundance of salmon lice, which are ectoparasites of salmonids in the sea. Here we review the current knowledge on the effects of salmon lice on wild sea trout. Salmon lice feed on host mucus, ... -
Effekten av nasjonale laksefjorder på risikoen for lakselusinfeksjon hos vill laksefisk langs norskekysten. Midtevaluering av ordningen med nasjonale laksefjorder
Bjørn, Pål Arne; Finstad, Bengt; Asplin, Lars; Johnsen, Ingrid Askeland; Nilsen, Rune; Serra-Llinares, Rosa Maria; Lindstrøm, Ulf; Helland, Ingeborg Palm; Berg, Marius; Harbitz, Alf (Rapport fra Havforskningen;Nr. 19-2013, Working paper, 2013) -
Effekten av nasjonale laksefjorder på risikoen for lakselusinfestasjon hos vill laksefisk langs norskekysten - Sluttrapportering av ordningen med nasjonale laksefjorder
Karlsen, Ørjan; Asplin, Lars; Finstad, Bengt; Sandvik, Anne Dagrun; Serra-Llinares, Rosa Maria; Johnsen, Ingrid Askeland; Nilsen, Rune; Berg, Marius; Uglem, Ingebrigt; Bjørn, Pål Arne (Fisken og Havet;2-2018, Research report, 2018)I 2007 ble 29 nasjonale laksefjorder opprettet. Disse er ment å gi et utvalg av de viktigste laksebestandene i Norge en særlig beskyttelse, inkludert mot oppdrettsvirksomhet i nærliggende fjord og kystområder. En statistisk ... -
Estimating the temporal overlap between post-smolt migration of Atlantic salmon and salmon lice infestation pressure from fish farms
Vollset, Knut Wiik; Barlaup, Bjørn Torgeir; Mahlum, Shad Kenneth; Bjørn, Pål Arne; Skilbrei, Ove Tommy (Journal article; Peer reviewed, 2016-09-01) -
Extent and ecological importance of escape through spawning in sea-cages for Atlantic cod
Uglem, Ingebrigt; Knutsen, Øyvind; Kjesbu, Olav Sigurd; Hansen, Øyvind J.; Mork, Jarle; Bjørn, Pål Arne; Varne, Rebekka; Nilsen, Rune; Ellingsen, Ingrid; Dempster, Tim (Journal article; Peer reviewed, 2012-11-14)The culture of certain fish species to sizes at which they can reproduce has led to the escape of fertilised eggs or ‘escape through spawning’. To investigate the extent and ecological importance of spawning in sea-cages ... -
Forslag til førstegenerasjons målemetode for miljøeffekt (effektindikatorer) med hensyn til genetisk påvirkning fra oppdrettslaks til villaks, og påvirkning av lakselus fra oppdrett på viltlevende laksefiskbestander
Taranger, Geir Lasse; Svåsand, Terje; Bjørn, Pål Arne; Jansen, P.A.; Heuch, P. A.; Grøntvedt, Randi Nygaard; Asplin, Lars; Skilbrei, Ove; Glover, Kevin A.; Skaala, Øystein; Wennevik, Vidar; Boxaspen, Karin (Rapport fra Havforskningen;Nr. 13 - 2012, Working paper, 2012)Havforskningsinstituttet (HI) har sammen med Veterinærinstituttet (VI) utarbeidet forslag til førstegenerasjons målemetode for miljøeffekt (effektindikatorer) med hensyn til genetisk påvirkning fra oppdrettslaks til ... -
High connectivity of salmon farms revealed by aggregation, residence and repeated movements of wild fish among farms
Uglem, Ingebrigt; Dempster, Tim; Bjørn, Pål Arne; Sanchez-Jerez, P.; Økland, Finn (Journal article; Peer reviewed, 2009-05-29)Marine fish farms are widespread in coastal waters throughout the world, yet how they modify the movement patterns of wild fish species is largely unknown. We determined the spatio-temporal distribution of saithe Pollachius ... -
Hva avgjør lakselusinfeksjon hos vill laksefisk? Statistisk bearbeiding av data fra nasjonal lakselusovervåking, 2004-2010
Helland, Ingeborg Palm; Finstad, Bengt; Uglem, Ingebrigt; Diserud, Ola Håvard; Foldvik, Anders; Hanssen, Frank Ole; Bjørn, Pål Arne; Nilsen, Rune; Jansen, Peder A (NINA rapport, Research report, 2012)Norsk institutt for naturforskning (NINA) med samarbeidspartnere har siden 1992 samlet inn et omfattende datamateriale over lakseluspåslag hos vill laksefisk. Rapporteringen fra denne nasjonale lakselusovervåkinga har så ... -
Hydrodynamisk spredningsmodell for lakselus og konsentrasjon av smittsomme kopepoditter
Sandvik, Anne Dagrun; Asplin, Lars; Albretsen, Jon; Bjørn, Pål Arne; Johnsen, Ingrid Askeland; Skardhamar, Jofrid; Myksvoll, Mari Skuggedal; Ådlandsvik, Bjørn (Rapport fra havforskningen;Nr. 12 - 2017, Research report, 2017) -
Impacts of salmon lice on mortality, marine migration distance and premature return in sea trout
Serra Llinares, Rosa Maria; Bøhn, Thomas; Karlsen, Ørjan; Nilsen, Rune; Freitas, Carla; Albretsen, Jon; Haraldstad, Tormod; Thorstad, Eva Bonsak; Elvik, Kristine Marit Schrøder; Bjørn, Pål Arne (Peer reviewed; Journal article, 2020)Brown trout Salmo trutta (L.) is a facultative anadromous species, where a portion of individuals in populations with access to the sea perform migrations to use the richer feeding resources. We investigated the effect of ...