Blar i Brage IMR på forfatter "Melle, Webjørn Raunsgård"

Viser treff 21-29 av 29

    • Mesopelagic fish gas bladder elongation, as estimated from wideband acoustic backscattering measurements 

      Khodabandeloo, Babak; Ona, Egil; Pedersen, Geir; Korneliussen, Rolf; Melle, Webjørn Raunsgård; Klevjer, Thor Aleksander (Peer reviewed; Journal article, 2022)
      Backscattered acoustic energy from a target varies with frequency and carries information about its material properties, size, shape, and orientation. Gas-bearing organisms are strong reflectors of acoustic energy at the ...

    • Mesopelagic flesh shear viscosity estimation from in situ broadband backscattering measurements by a viscous–elastic model inversion 

      Khodabandeloo, Babak; Agersted, Mette Dalgaard; Klevjer, Thor A.; Pedersen, Geir; Melle, Webjørn Raunsgård (Peer reviewed; Journal article, 2021)
      In fisheries acoustics, target strength (TS) is a key parameter in converting acoustic measurements to biological information such as biomass. Modelling is a versatile tool to estimate TS of marine organisms. For swimbladdered ...

    • Micronekton biomass distribution, improved estimates across four north Atlantic basins 

      Klevjer, Thor A.; Melle, Webjørn Raunsgård; Knutsen, Tor; Strand, Espen; Korneliussen, Rolf; Dupont, Nicolas; Salvanes, Anne Gro Vea; Wiebe, Peter H. (Peer reviewed; Journal article, 2019)
      Distribution of micronekton was investigated during early summer of 2013, using data from a cruise covering the central parts of four north Atlantic basins, the Norwegian Sea (NS), Iceland Sea (ICS), Irminger Sea (IRS), ...

    • Modeling emergent life histories of copepods 

      Huse, Geir; Melle, Webjørn Raunsgård; Skogen, Morten D.; Hjøllo, Solfrid Sætre; Svendsen, Einar; Budgell, William Paul (Journal article; Peer reviewed, 2018)
      The distribution and population dynamics of zooplankton are affected by the interplay between currents, behavior, and selective growth, mortality, and reproduction. Here, we present an individual based model for a copepod ...

    • Panel-based Assessment of Ecosystem Condition of the Norwegian Sea Pelagic Ecosystem 

      Arneberg, Per; Siwertsson, Anna; Husson, Berengere; Børsheim, Knut Yngve; Fauchald, Per; Hjøllo, Solfrid Sætre; Høines, Åge Sigurd; Jones, Elizabeth Marie; Melle, Webjørn Raunsgård; Nøttestad, Leif; Planque, Benjamin; Skagseth, Øystein; Slotte, Aril; Solvang, Hiroko Kato; Stenevik, Erling Kåre (Rapport fra havforskningen;2023 -16, Research report, 2023)
      The System for Assessment of Ecological Condition, coordinated by the Norwegian Environment Agency, is intended to form the foundation for evidence-based assessments of the ecological condition of Norwegian terrestrial and ...

    • Poor feeding opportunities and reduced condition factor for salmon post-smolts in the Northeast Atlantic Ocean 

      Utne, Kjell Rong; Pauli, Beatriz Diaz; Haugland, Monika; Jacobsen, Jan Arge; Maoileidigh, Niall O´; Melle, Webjørn Raunsgård; Broms, Cecilie; Nøttestad, Leif; Holm, Marianne; Thomas, Katie; Wennevik, Vidar (Peer reviewed; Journal article, 2021)
      During the last few decades, many wild Atlantic salmon populations have declined dramatically. One possible contributing factor for the decline is reduced prey availability at sea. Here, we examine post-smolt diet and ...

    • Structure and functioning of four North Atlantic ecosystems - A comparative study 

      Melle, Webjørn Raunsgård; Klevjer, Thor A.; Drinkwater, Kenneth F.; Strand, Espen; Naustvoll, Lars Johan; Wiebe, Peter H.; Aksnes, Dag Lorents; Knutsen, Tor; Sundby, Svein; Slotte, Aril; Dupont, Nicolas; Salvanes, Anne Gro Vea; Korneliussen, Rolf; Huse, Geir (Peer reviewed; Journal article, 2020)
      The epi- and mesopelagic ecosystems of four sub-polar ocean basins, the Labrador, Irminger, Iceland and Norwegian seas, were surveyed during two legs from Bergen, Norway, to Nuuk, Greenland, and back to Bergen. The survey ...

    • Summer distribution and demography of Antarctic krill Euphausia superba Dana, 1852 (Euphausiacea) at the South Orkney Islands, 2011–2015 

      Krafft, Bjørn Arne; Knutson, T; Krag, Ludvig Ahm; Jensen, Knut Helge; Skaret, Georg; Krakstad, Jens-Otto; Larsen, Stuart; Melle, Webjørn Raunsgård; Iversen, Svein Arnholt; Godø, Olav Rune (Journal article; Peer reviewed, 2018)
      We carried out a survey of Antarctic krill (Euphausia superbaDana, 1850) from 2011 to 2015 to establish a long-term, time-series dataset of distribution, abundance, and demography for this species in the South Orkney Islands ...

    • Vertical distribution and migration of mesopelagic scatterers in four north Atlantic basins 

      Klevjer, Thor A.; Melle, Webjørn Raunsgård; Knutsen, Tor; Aksnes, Dag Lorents (Peer reviewed; Journal article, 2020)
      We studied vertical distribution and diel vertical migration (DVM) behaviour of mesopelagic acoustic scattering layers in relation to environmental conditions in the Norwegian Sea, the Iceland Sea, the Irminger Sea, and ...