Browsing NTNU Open by Author "Jónsdóttir, Kristbjörg Edda"

Now showing items 1-7 of 7

    • Current flow and dissolved oxygen in a full-scale stocked fish-cage with and without lice shielding skirts 

      Jónsdóttir, Kristbjörg Edda; Volent, Zsolt; Alfredsen, Jo Arve (Peer reviewed; Journal article, 2020)
      Shielding skirts are widely used on Atlantic Salmon sea-cages as a non-invasive preventive measure against salmon lice infestations. The skirts are however known to impact the current flow and thereby the environment within ...

    • Current flow processes at fullscale Atlantic salmon farm sites 

      Jónsdóttir, Kristbjörg Edda (Doctoral theses at NTNU;2021:133, Doctoral thesis, 2021)
      The aquaculture industry has grown exponentially the last 30 years. In Norway the Atlantic salmon is the dominant species and the rapid growth of the industry has led to both challenges and controversy. The issues faced ...

    • Detection of a stress related acoustic signature by passive acoustic monitoring in Atlantic salmon farming 

      Jónsdóttir, Kristbjörg Edda; Mathiassen, John Reidar Bartle; Svendsen, Eirik Starheim; Rosten, Carolyn; Bloecher, Nina; Føre, Martin; Olsen, Rolf Erik; Finstad, Bengt; Volent, Zsolt (Peer reviewed; Journal article, 2024)
      Crowding is a necessary operation for moving fish out of or between sea cages in Atlantic salmon farming. These operations consist of gradually reducing available volume in the nets to increase the biomass density. This ...

    • Dynamics of dissolved oxygen inside salmon sea-cages with lice shielding skirts at two hydrographically different sites 

      Jónsdóttir, Kristbjörg Edda; Volent, Zsolt; Alfredsen, Jo Arve (Peer reviewed; Journal article, 2020)
      Shielding skirts are widely used as a non-invasive preventive measure against salmon lice Lepeophtheirus salmonis infestations on Atlantic salmon Salmo Salar L. in sea-cages. Low levels of dissolved oxygen (DO) are reported ...

    • Fish welfare based classification method of ocean current speeds at aquaculture sites 

      Jónsdóttir, Kristbjörg Edda; Hvas, Malthe; Alfredsen, Jo Arve; Føre, Martin; Alver, Morten; Bjelland, Hans Vanhauwaert; Oppedal, Frode (Journal article; Peer reviewed, 2019)
      ABSTRACT: A major trend in marine aquaculture is to move production to more exposed sites with occasionally rough ocean current events. However, it is unclear whether fish will thrive in these extreme environments, since ...

    • Identification of spectral signature for in situ real-time monitoring of smoltification 

      Svendsen, Eirik; Volent, Zsolt; Schellewald, Christian; Tsarau, Andrei; Bjorgan, Asgeir; Venås, Birger; Bloecher, Nina; Bondø, Morten Steen; Føre, Martin; Jónsdóttir, Kristbjörg Edda; Stefansson, Sigurd Olav (Peer reviewed; Journal article, 2021)
      We describe the use of an optical hyperspectral sensing technique to identify the smoltification status of Atlantic salmon (Salmo salar) based on spectral signatures, thus potentially providing smolt producers with an ...

    • Simulation of Anchor Loads on Pipelines 

      Jónsdóttir, Kristbjörg Edda (Master thesis, 2016)
      Incidents where anchor and pipeline interact are rare, but such an event can have drastic consequences. In the report, "Pipeline and Riser Loss of Containment" by HSE, published in 2001 for the UK sector, 44 incidents ...