Blar i Published externally på forfatter "Bjørn, Pål Arne"
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Modelled salmon lice dispersion and infestation patterns in a sub-arctic fjord
Skardhamar, Jofrid; Albretsen, Jon; Sandvik, Anne Dagrun; Lien, Vidar Surén; Myksvoll, Mari Skuggedal; Johnsen, Ingrid Askeland; Asplin, Lars; Ådlandsvik, Bjørn; Halttunen, Elina; Bjørn, Pål Arne (Journal article; Peer reviewed, 2018)Salmon lice infestation is a major challenge for the aquaculture industry in Norway, threatening wild salmonid populations and causing welfare problems for farmed salmon. Lice dispersion and infestation patterns are simulated ... -
Movement diversity and partial sympatry of coastal and Northeast Arctic cod ecotypes at high latitudes
Strøm, John Fredrik; Bøhn, Thomas; Skjæraasen, Jon Egil; Gjelland, Karl Øystein; Karlsen, Ørjan; Johansen, Torild; Hanebrekke, Tanja Lexau; Bjørn, Pål Arne; Olsen, Esben Moland (Peer reviewed; Journal article, 2023)Movement diversity within species represent an important but often neglected, component of biodiversity that affects ecological and genetic interactions, as well as the productivity of exploited systems. By combining ... -
Movement diversity and partial sympatry of coastal and Northeast Arctic cod ecotypes at high latitudes
Strøm, John Fredrik; Bøhn, Thomas; Skjæraasen, Jon Egil; Gjelland, Karl Øystein; Karlsen, Ørjan; Johansen, Torild; Hanebrekke, Tanja Lexau; Bjørn, Pål Arne; Olsen, Esben Moland (Peer reviewed; Journal article, 2023)Movement diversity within species represent an important but often neglected, component of biodiversity that affects ecological and genetic interactions, as well as the productivity of exploited systems. By combining ... -
Nasjonal lakselusovervåkning 2008 på ville bestander av laks, sjøørret og sjørøye langs Norskekysten samt i forbindelse med evaluering av nasjonale laksevassdrag og laksefjorder
Bjørn, Pål Arne; Finstad, Bengt; Nilsen, Rune; Uglem, Ingebrigt; Asplin, Lars; Skaala, Øystein; Boxaspen, Karin Kroon; Øverland, Tore (Research report, 2009)Årlige epidemier av lakselus på vill laksefisk i oppdrettsintensive områder var, sammen med rømming av oppdrettslaks, det viktigste argumentet for opprettelsen av nasjonale laksefjorder. De endelig vedtatte nasjonale ... -
Nasjonal lakselusovervåkning 2009 på ville bestander av laks, sjøørret og sjørøye langs Norskekysten samt i forbindelse med evaluering av nasjonale laksevassdrag og laksefjorder
Bjørn, Pål Arne; Finstad, Bengt; Nilsen, Rune; Uglem, Ingebrigt; Asplin, Lars; Skaala, Øystein; Hvidsten, Nils Arne (NINA rapport, Research report, 2010)Årlige epidemier av lakselus på vill laksefisk i oppdrettsintensive områder var, sammen med rømming av oppdrettslaks, det viktigste argumentet for opprettelsen av nasjonale laksefjorder. De endelig vedtatte nasjonale ... -
Nasjonal overvåkning av lakselusinfeksjon på ville bestander av laks, sjøørret og sjørøye i forbindelse med nasjonale laksevassdrag og laksefjorder
Bjørn, Pål Arne; Finstad, Bengt; Nilsen, Rune; Asplin, Lars; Uglem, Ingebrigt; Skaala, Øystein; Boxaspen, Karin Kroon; Øverland, Tore (NINA rapport, Research report, 2008)Årlige epidemier av lakselus på vill laksefisk i oppdrettsintensive områder var, sammen med rømming av oppdrettslaks, det viktigste argumentet for opprettelsen av nasjonale laksefjorder. De endelig vedtatte nasjonale ... -
Nearby farms are a source of lice for wild salmonids: a reply to Jansen et al. (2016)
Serra-Llinares, Rosa Maria; Bjørn, Pål Arne; Finstad, Bengt; Nilsen, Rune; Asplin, Lars (Journal article; Peer reviewed, 2016-05-17)Jansen et al. (2016; Aquacult Environ Interact 8:349-350) question the regression analysis presented in Serra-Llinares et al. (2014; Aquacult Environ Interact 5:1-16), which correlates lice abundances on farmed and wild ... -
Net-biting and escape behaviour in farmed Atlantic cod Gadus morhua: effects of feed stimulants and net traits
Damsgård, Børge; Høy, Erik; Uglem, Ingebrigt; Hedger, Richard David; Izquierdo-Gomez, David; Bjørn, Pål Arne (Journal article; Peer reviewed, 2012-09-25)Preventing farmed fish from escaping sea cages is a major challenge for developing sustainable aquaculture practices. In this study, the individual behaviour of Atlantic cod Gadus morhua to inspect and bite the net was ... -
Population dynamics of salmon lice Lepeophtheirus salmonis on Atlantic salmon and sea trout
Stien, Audun; Bjørn, Pål Arne; Heuch, P. A.; Elston, David A. (Journal article; Peer reviewed, 2005-04-13)The salmon louse Lepeophtheirus salmonis is a common ectoparasite of both farmed and wild salmonids in the marine environment, and can have a significant negative effect on the survival and growth of its host. To facilitate ... -
Post-escape dispersal of juvenile Atlantic cod Gadus morhua from Norwegian fish farms and their potential for recapture
Serra-Llinares, Rosa Maria; Nilsen, Rune; Uglem, Ingebrigt; Arechavala-Lopez, P.; Bjørn, Pål Arne; Noble, Chris (Peer reviewed; Journal article, 2013) -
Registreringer av lakselus på laks, sjøørret og sjørøye i 2006
Bjørn, Pål Arne; Finstad, Bengt; Nilsen, Rune; Skaala, Øystein; Øverland, Tore (NINA rapport;, Research report, 2007)Resultatene fra 2006 viste at infeksjonstrykket varierte noe mellom vassdragene i tid og rom, men at det generelt var moderat til høy infeksjon i alle undersøkelsesområdene foruten i Altafjorden. Dette til tross for at ... -
Risk assessment of the environmental impact of Norwegian Atlantic salmon farming
Taranger, Geir Lasse; Karlsen, Ørjan; Bannister, Raymond; Glover, Kevin; Husa, Vivian; Karlsbakk, Egil; Kvamme, Bjørn Olav; Boxaspen, Karin Kroon; Bjørn, Pål Arne; Finstad, Bengt; Madhun, Abdullah Sami; Morton, Hugh Craig; Svåsand, Terje (Journal article; Peer reviewed, 2014-09-02)Norwegian aquaculture has grown from its pioneering days in the 1970s to be a major industry. It is primarily based on culturing Atlantic salmon and rainbow trout and has the potential to influence the surrounding environment ... -
Salmon lice infection on wild salmonids in marine protected areas: an evaluation of the Norwegian ‘National Salmon Fjords
Serra-Llinares, Rosa Maria; Bjørn, Pål Arne; Finstad, Bengt; Nilsen, Rune; Harbitz, Alf; Berg, Marius; Asplin, Lars (Journal article; Peer reviewed, 2014-02-05)In Norway, 29 fjords and 52 rivers have been designated for protection in order to prevent the infection of important populations of wild salmonids with salmon lice of farm origin. We evaluated the effect of this protection ... -
Salmon lice sampled from wild Atlantic salmon and sea trout throughout Norway display high frequencies of the genotype Associated with pyrethroid resistance
Fjørtoft, Helene Børretzen; Nilsen, Frank; Besnier, Francois; Stene, Anne; Bjørn, Pål Arne; Tveten, Ann-Kristin; Aspehaug, Vidar Teis; Finstad, Bengt; Glover, Kevin (Journal article; Peer reviewed, 2019)Atlantic salmon Salmo salar aquaculture is based on the use of open-pen sea cages, with the consequence that farmed fish are both recipients and sources of pathogens from surrounding waters. Currently, the parasitic salmon ... -
Sampling planktonic salmon lice in Norwegian fjords
Skardhamar, Jofrid; Fagerli, Margrethe Nilsen; Reigstad, Marit; Sandvik, Anne Dagrun; Bjørn, Pål Arne (Journal article; Peer reviewed, 2019)Risk of mortality of wild salmon caused by salmon lice is used as an index for managing aquaculture production in Norway and is based on monitoring of lice attached to wild salmonids and modelled concentrations of lice ... -
Sea trout adapt their migratory behaviour in response to high salmon lice concentrations
Halttunen, Elina; Gjelland, Karl Øystein; Hamel, Sandra; Serra-Llinares, Rosa Maria; Nilsen, Rune; Arechavala-Lopez, Pablo; Skardhamar, Jofrid; Johnsen, Ingrid Askeland; Asplin, Lars; Karlsen, Ørjan; Bjørn, Pål Arne; Finstad, Bengt (Peer reviewed; Journal article, 2017)Sea trout face growth – mortality trade-offs when entering the sea to feed. Salmon lice epizootics resulting from aquaculture have shifted these trade-offs, as salmon lice might both increase mortality and reduce growth ... -
Sea trout Salmo trutta in the subarctic: home-bound but large variation in migratory behaviour between and within populations
Strøm, John Fredrik; Jensen, Jenny L. A.; Nikolopoulos, Anna; Nordli, Eivind; Bjørn, Pål Arne; Bøhn, Thomas (Peer reviewed; Journal article, 2021) -
Statistical and ecological challengesof monitoring parasitic salmon lice infestationsin wild salmonid fish stocks
Helland, Ingeborg Palm; Uglem, Ingebrigt; Jansen, Peder A; Diserud, Ola Håvard; Bjørn, Pål Arne; Finstad, Bengt (Journal article; Peer reviewed, 2015-12-03)Ecological monitoring programmes should provide precise data to inform management, but the data quality is often limited by methodological challenges and the need for cost-effective sampling. Parasite infestations are ... -
The Phe362Tyr mutation conveying resistance to organophosphates occurs in high frequencies in salmon lice collected from wild salmon and trout
Fjørtoft, Helene Børretzen; Besnier, Francois; Stene, Anne; Nilsen, Frank; Bjørn, Pål Arne; Tveten, Ann-Kristin; Finstad, Bengt; Aspehaug, Vidar; Glover, Kevin (Peer reviewed; Journal article, 2017) -
Timing is everything: Survival of Atlantic salmon Salmo salar postsmolts during events of high salmon lice densities
Bøhn, Thomas; Gjelland, Karl Øystein; Serra Llinares, Rosa Maria; Finstad, Bengt; Primicerio, Raul; Nilsen, Rune; Karlsen, Ørjan; Sandvik, Anne Dagrun; Skilbrei, Ove Tommy; Elvik, Kristine Marit Schrøder; Skaala, Øystein; Bjørn, Pål Arne (Peer reviewed; Journal article, 2020)Atlantic salmon in aquaculture act as reservoir hosts and vectors of parasites like salmon lice and this parasite is shown to harm wild salmonid populations. In this study, n = 29,817 tagged Atlantic salmon were studied ...