• Achieving Reliable Estimates of the Spatial Distribution of Kelp Biomass 

      van Son, Thijs Christiaan; Nikolioudakis, Nikolaos; Steen, Henning; Albretsen, Jon; Furevik, Birgitte Rugaard; Elvenes, Sigrid; Moy, Frithjof; Norderhaug, Kjell Magnus (Peer reviewed; Journal article, 2020)
      Kelp forests are highly productive systems that are important ecologically and commercially as well as in a blue carbon perspective. Given their importance, there is an urgent need to achieve reliable estimates of the ...
    • Aktiv forvaltning av marine ressurser - Frøya og Hitra - Arbeidsrapport 2017-2018 

      Kleiven, Alf Ring; Espeland, Sigurd Heiberg; Albretsen, Jon; Halvorsen, Kim Aleksander Tallaksen; Søvik, Guldborg; Grefsrud, Ellen Sofie; Ottesen, Dag (Rapport fra havforskningen;2019 - 14, Research report, 2019)
      Prosjektet ‘Aktiv forvaltning av marine ressurser- Frøya og Hitra’ ble formelt startet opp høsten 2017. Den overordnete målsetting med prosjektet er å etablere en solid kunnskapsplattform for å sikre de marine verdiene og ...
    • Carbon export is facilitated by sea urchins transforming kelp detritus 

      Filbee-Dexter, Karen; Pedersen, Morten Foldager; Fredriksen, Stein; Norderhaug, Kjell Magnus; Rinde, Eli; Kristiansen, Trond; Albretsen, Jon; Wernberg, Thomas (Peer reviewed; Journal article, 2019)
      With the increasing imperative for societies to act to curb climate change by increasing carbon stores and sinks, it has become critical to understand how organic carbon is produced, released, transformed, transported, and ...
    • Classification and Mapping of Benthic Biotopes in Arctic and Sub-Arctic Norwegian Waters 

      Buhl-Mortensen, Pål; Dolan, Margaret; Ross, Rebecca; Gonzalez-Mirelis, Genoveva; Buhl-Mortensen, Lene; Bjarnadóttir, Lilja Rún; Albretsen, Jon (Peer reviewed; Journal article, 2020)
      In this paper, we describe the species composition of biotopes occurring in a wide range of environments and present their geographic distribution based on results from quantitative analyses of video-records collected as ...
    • Climate Change and Genetic Structure of Leading Edge and Rear End Populations in a Northwards Shifting Marine Fish Species, the Corkwing Wrasse (Symphodus melops) 

      Knutsen, Halvor; Jorde, Per Erik; Gonzalez, Enrique Blanco; Robalo, Joana; Albretsen, Jon; Almada, Vitor (Journal article; Peer reviewed, 2013-06-26)
      One mechanism by which marine organisms may respond to climate shifts is range shifts. The corkwing wrasse (Symphodus melops) is a temperate fish species, inhabiting the coasts of Europe, that show strong indications of ...
    • Climate Change and Genetic Structure of Leading Edge and Rear End Populations in a Northwards Shifting Marine Fish Species, the Corkwing Wrasse (Symphodus melops) 

      Knutsen, Halvor; Jorde, Per Erik; Blanco Gonzalez, Enrique; Robalo, Joana I.; Albretsen, Jon; Almada, Vitor C. (Peer reviewed; Journal article, 2013)
      One mechanism by which marine organisms may respond to climate shifts is range shifts. The corkwing wrasse (Symphodus melops) is a temperate fish species, inhabiting the coasts of Europe, that show strong indications of ...
    • Climate change opens new frontiers for marine species in the Arctic: Current trends and future invasion risks 

      Chan, Farrah T; Stanislawczyk, Keara; Sneekes, Anna C; Dvoretsky, Alexander; Gollasch, Stephan; Minchin, Dan; David, Matej; Jelmert, Anders; Albretsen, Jon; Bailey, Sarah A (Journal article; Peer reviewed, 2018)
      Climate change and increased anthropogenic activities are expected to elevate the potential of introducing nonindigenous species (NIS) into the Arctic. Yet, the knowledge base needed to identify gaps and priorities for NIS ...
    • Climatic variability in the Skagerrak and coastal waters of Norway 

      Albretsen, Jon; Aure, Jan; Sætre, Roald; Danielssen, Didrik S. (Journal article; Peer reviewed, 2011-12-18)
      The Institute of Marine Research in Norway collects marine data from all national waters. Data are primarily collected from vessels, but observation buoys, manual measurements, and oceanographic gliders are also used. The ...
    • Cod at drift in the North Sea 

      Huserbråten, Mats Brockstedt Olsen; Moland, Even; Albretsen, Jon (Journal article; Peer reviewed, 2018)
      There has been a large-scale geographical re-distribution of the North Sea cod stock over the past century, and recent surveys indicate a north-eastern modal distribution. Here we assess the consequences of the contemporary ...
    • Dispersion of salmon lice in the Hardangerfjord 

      Asplin, Lars; Johnsen, Ingrid A.; Sandvik, Anne Dagrun; Albretsen, Jon; Sundfjord, Vibeke; Aure, Jan; Boxaspen, Karin (Journal article; Peer reviewed, 2013-10-15)
      The abundance of salmon lice in the Hardangerfjord is potentially large enough to be a threat to the wild fish stocks of the fjord. The salmon louse spends a period of 2–4 weeks in its planktonic stages drifting in the ...
    • Diurnal tides on the Barents Sea continental slope 

      Skardhamar, Jofrid; Skagseth, Øystein; Albretsen, Jon (Journal article; Peer reviewed, 2014-12-10)
      Measurements of diurnal tides over the continental slope between the Norwegian Sea and the Barents Sea shelf are presented. Numerical 3D simulations, in agreement with field data, show strong cross-slope velocities and ...
    • Eddy-driven recirculation of Atlantic Water in Fram Strait 

      Hattermann, Tore; Isachsen, Pål Erik; von Appen, Wilken-Jon; Albretsen, Jon; Sundfjord, Arild (Journal article; Peer reviewed, 2016)
      Eddy‐resolving regional ocean model results in conjunction with synthetic float trajectories and observations provide new insights into the recirculation of the Atlantic Water (AW) in Fram Strait that significantly impacts ...
    • Environmental change influences the life history of salmon Salmo salar in the North Atlantic Ocean 

      Jonsson, Bror; Jonsson, Nina; Albretsen, Jon (Peer reviewed; Journal article, 2016)
      Annual mean total length (LT) of wild one-sea-winter (1SW) Atlantic salmon Salmo salar of the Norwegian River Imsa decreased from 63 to 54 cm with a corresponding decrease in condition factor (K) for cohorts migrating to ...
    • Evaluation of a national operational salmon lice monitoring system - from physics to fish 

      Myksvoll, Mari Skuggedal; Sandvik, Anne Dagrun; Albretsen, Jon; Asplin, Lars; Johnsen, Ingrid Askeland; Karlsen, Ørjan; Kristensen, Nils Melsom; Melsom, Arne; Skardhamar, Jofrid; Ådlandsvik, Bjørn (Journal article; Peer reviewed, 2018)
      The Norwegian government has decided that the aquaculture industry shall grow, provided that the growth is environmentally sustainable. Sustainability is scored based on the mortality of wild salmonids caused by the parasitic ...
    • Evaluation of a Nordic Seas 4 km numerical ocean model hindcast archive (SVIM), 1960-2011 

      Lien, Vidar S.; Gusdal, Yvonne; Albretsen, Jon; Melsom, Arne; Vikebø, Frode B. (Fisken og Havet;7-2013, Research report, 2013)
    • Fysisk oseanografiske forhold i produksjonsområdene for akvakultur 

      Albretsen, Jon; Asplin, Lars (Rapport fra havforskningen;Nr. 11 - 2017, Research report, 2017)
    • Fysisk oseanografiske forhold i produksjonsområdene for akvakultur - oppdatering september 2019 

      Albretsen, Jon; Asplin, Lars (Rapport fra havforskningen;2019 - 54, Research report, 2019)
      Rapporten beskriver det fysiske miljøet med fokus på vanntemperatur og saltholdighet, sistnevnte gjennom tidsserier av modellert overflatesaltholdighet og ferskvannsavrenning for perioden 2012-2019. Sjøtemperatur påvirker ...
    • Genetic analysis of goldsinny wrasse reveals evolutionary insights into population connectivity and potentialevidence of inadverent translocationvia aquaculture. 

      Jansson, Eeva; Sanchez, Maria Quintela; Dahle, Geir; Albretsen, Jon; Knutsen, Halvor; André, Carl; Strand, Åsa; Mortensen, Stein; Taggart, John B.; Karlsbakk, Egil; Kvamme, Bjørn Olav; Glover, Kevin (Peer reviewed; Journal article, 2017)
    • Havbruk til havs – Fysiske miljøbetingelser og økosystempåvirkning 

      Albretsen, Jon; Beck, Alexander Christian; Biuw, Martin; Huserbråten, Mats Brockstedt Olsen; Kutti, Tina; Kvamme, Bjørn Olav; Skagseth, Øystein; Utne, Kjell Rong; Vikebø, Frode Bendiksen; Wennevik, Vidar (Rapport fra havforskningen;2019 - 41, Research report, 2019)
      Nærings- og fiskeridepartementet ber om kunnskapsinnspill for å vurdere egnede lokaliteter for havbruk til havs. Fiskeridirektoratet har i den sammenheng bedt Havforskningsinstituttet om å bidra på fire områder; i) Krav ...
    • The hydrodynamic foundation for salmon lice dispersion modeling along the Norwegian coast 

      Asplin, Lars; Albretsen, Jon; Johnsen, Ingrid A.; Sandvik, Anne Dagrun (Peer reviewed; Journal article, 2020)
      Norway has complicated dynamics in the coastal ocean and in the fjords. In this area is also the largest salmon aquaculture industry in the world. The salmon industry is valuable for Norwegian economy worth more than 60 ...