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  • Fish quality and market performance: The case of the coastal fishery for Atlantic cod in Norway 

    Sogn-Grundvåg, Geir; Zhang, Dengjun; Henriksen, Edgar; Joensen, Sjúrður; Bendiksen, Bjørn Inge; Hermansen, Øystein (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-22)
    This study focuses on fish quality and resource utilization at the ex-vessel level of the value chain. Substantial waste in the form of reduced fish quality is revealed for Atlantic cod landed by the coastal fleet in Norway, with approximately 30% of the sampled cod from 399 catches downgraded, implying reduced value of products in onshore processing. By using an objective quality index for individual ...
  • Synthesis and Evaluation of the Tetracyclic Ring-System of Isocryptolepine and Regioiso-Mers for Antimalarial, Antiproliferative and Antimicrobial Activities 

    Håheim, Katja Stangeland; Lindback, Emil; Tan, Kah Ni; Albrigtsen, Marte; Helgeland, Ida Therese Urdal; Clemence, Lauga; Matringe, Theodora; Kennedy, Emily K.; Andersen, Jeanette Hammer; Avery, Vicky M.; Sydnes, Magne Olav (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-30)
    A series of novel quinoline-based tetracyclic ring-systems were synthesized and evaluated in vitro for their antiplasmodial, antiproliferative and antimicrobial activities. The novel hydroiodide salts 10 and 21 showed the most promising antiplasmodial inhibition, with compound 10 displaying higher selectivity than the employed standards. The antiproliferative assay revealed novel pyridophenanthridine ...
  • Widely rhythmic transcriptome in Calanus finmarchicus during the high Arctic summer solstice period 

    Payton, Laura; Hüppe, Lukas; Noirot, Celine; Hoede, Claire; Last, Kim; Wilcockson, David; Ershova, Elizaveta; Valière, Sophie; Meyer, Bettina (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-10)
    Solar light/dark cycles and seasonal photoperiods underpin daily and annual rhythms of life on Earth. Yet, the Arctic is characterized by several months of permanent illumination (“midnight sun”). To determine the persistence of 24h rhythms during the midnight sun, we investigated transcriptomic dynamics in the copepod <i>Calanus finmarchicus</i> during the summer solstice period in the Arctic, with ...
  • Quantifying the consequence of applying conservative assumptions in the assessment of oil spill effects on polar cod (Boreogadus saida) populations 

    de Vries, Pepjin; Tamis, Jacqueline; Nahrgang, Jasmine; Frantzen, Marianne; Jak, Robbert; Klok, Chris; van den Heuvel-Greve, Martine J; Hemerik, Lia (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-23)
    In order to assess the potential impact from oil spills and decide the optimal response actions, prediction of population level effects of key resources is crucial. These assessments are usually based on acute toxicity data combined with precautionary assumptions because chronic data are often lacking. To better understand the consequences of applying precautionary approaches, two approaches for ...
  • Body Temperature and Activity Rhythms Under Different Photoperiods in High Arctic Svalbard ptarmigan (Lagopus muta hyperborea) 

    Appenroth, Daniel; Nord, Andreas; Hazlerigg, David; Wagner, Gabriela (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-08)
    Organisms use circadian rhythms to anticipate and exploit daily environmental oscillations. While circadian rhythms are of clear importance for inhabitants of tropic and temperate latitudes, its role for permanent residents of the polar regions is less well understood. The high Arctic Svalbard ptarmigan shows behavioral rhythmicity in presence of light-dark cycles but is arrhythmic during the polar ...
  • Site-specific responses of fungal and bacterial abundances to experimental warming in litter and soil across arctic and alpine tundra 

    Jeanbille, Mathilde; Clemmensen, Karina E; Juhanson, Jaanis; Michelsen, Anders; Cooper, Elisabeth J.; Henry, Greg H.R.; Hofgaard, Annika; Hollister, Robert D.; Jónsdóttir, Ingibjörg Svala; Klanderud, Kari; Tolvanen, Anne; Hallin, Sara (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-01)
    Vegetation change of the Arctic tundra due to global warming is a well-known process, but the implication for the belowground microbial communities, key in nutrient cycling and decomposition, is poorly understood. We characterized the fungal and bacterial abundances in litter and soil layers across 16 warming experimental sites at 12 circumpolar locations. We investigated the relationship between ...
  • The hidden influence of large particles on ocean colour 

    Davies, Emlyn John; Basedow, Sünnje Linnéa; McKee, David (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-17)
    Optical constituents in the ocean are often categorized as water, phytoplankton, sediments and dissolved matter. However, the optical properties of seawater are influenced, to some degree, by scattering and absorption by all particles in the water column. Here we assess the relevant size ranges for determining the optical properties of the ocean. We present a theoretical basis supporting the hypothesis ...
  • Piscine Orthoreovirus (PRV)-3, but Not PRV-2, Cross-Protects against PRV-1 and Heart and Skeletal Muscle Inflammation in Atlantic Salmon 

    Malik, Muhammad Salman; Teige, Lena Hammerlund; Braaen, Stine; Olsen, Anne Berit; Nordberg, Monica; Amundsen, Marit; Kannimuthu, Dhamotharan; Svenning, Steingrim; Edholm, Eva-Stina Isabella; Takano, Tomokazu; Jørgensen, Jorunn; Wessel, Øystein; Rimstad, Espen; Dahle, Maria (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-06)
    Heart and skeletal muscle inflammation (HSMI), caused by infection with Piscine orthoreovirus-1 (PRV-1), is a common disease in farmed Atlantic salmon (Salmo salar). Both an inactivated whole virus vaccine and a DNA vaccine have previously been tested experimentally against HSMI and demonstrated to give partial but not full protection. To understand the mechanisms involved in protection against HSMI ...
  • A Surge toward a Sustainable Future: Organizational Change and Transformational Vision by an Oil and Gas Company 

    Jaber, Tahrir (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-13)
    <p>Context: reflecting the call being made by the United Nations to solve our current climate challenges and reduce companies’ CO2 emissions, there is a strong need for large corporations to not only employ the terminology of sustainable transitions, but to implement strategies and select new alternative sustainable solutions. <p>Objective: this study fills a gap in the literature by developing and ...
  • Redefining the oceanic distribution of Atlantic salmon 

    Rikardsen, Audun H.; Righton, David; Strøm, John Fredrik; Thorstad, Eva Bonsak; Gargan, Patrick G.; Sheehan, Timothy F.; Økland, Finn; Chittenden, Cedar; Hedger, Richard David; Næsje, Tor; Renkawitz, Mark; Sturlaugsson, Johannes; Caballero, Pablo; Baktoft, Henrik; Davidsen, Jan Grimsrud; Halttunen, Elina; Wright, Serena; Finstad, Bengt; Aarestrup, Kim (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-10)
    Determining the mechanisms driving range-wide reductions in Atlantic salmon marine survival is hindered by an insufcient understanding of their oceanic ecology and distribution. We attached 204 pop-up satellite archival tags to post-spawned salmon when they migrated to the ocean from seven European areas and maiden North American salmon captured at sea at West Greenland. Individuals migrated ...
  • Early spring subglacial discharge plumes fuel under-ice primary production at a Svalbard tidewater glacier 

    Vonnahme, Tobias; Persson, Emma; Dietrich, Ulrike; Hejdukova, Eva; Dybwad, Christine; Elster, Josef; Chierici, Melissa; Gradinger, Rolf (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-27)
    Subglacial upwelling of nutrient-rich bottom water is known to sustain elevated summer primary production in tidewater-glacier-influenced fjord systems. However, the importance of subglacial upwelling during the early spring season has not been considered yet. We hypothesized that subglacial discharge under sea ice is present in early spring and that its flux is sufficient to increase phytoplankton ...
  • Dense mesopelagic sound scattering layer and vertical segregation of pelagic organisms at the Arctic-Atlantic gateway during the midnight sun 

    Priou, Pierre; Nikolopoulos, Anna; Flores, Hauke; Gradinger, Rolf; Kunisch, Eirin; Katlein, Christian; Castellani, Giulia; Linders, Torsten Theodor; Berge, Jørgen; Fisher, Jonathan A.D.; Geoffroy, Maxime (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-18)
    Changes in vertical and spatial distributions of zooplankton and small pelagic fish impact the biological carbon pump and the distribution of larger piscivorous fish and marine mammal species. However, their distribution and abundance remain poorly documented at high latitudes because of the difficulties inherent to sampling relatively fast-moving organisms in ice-covered waters. This study documents ...
  • Workshop methodology design: Innovation-oriented participatory processes for sustainability 

    Bertella, Giovanna; Lupini, Sara; Romanelli, Cecilia Rossi; Font aulet, Xavier (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-03)
    Workshop methodologies based on overarching knowledge structures are necessary for a shift of the tourism sector towards sustainability. We adopted a participatory action research approach and designed a workshop methodology based on the main tenets and tools of the theory of change, design thinking, and sustainable business models. We tested this methodology within a project initiated by a destination ...
  • Hvordan opplever mellomledere i kommunal helse - og omsorgssektor sitt handlingsrom i strategiske endringsprosesser? 

    Aas, Elin Carina (Master thesis; Mastergradsoppgave, 2020-11-30)
    Å inneha rollen som mellomleder fremstilles i mange sammenhenger som den mest krevende rollen i en organisasjon, og beskrives som en som binder sammen organisasjoners operasjonelle og strategiske nivå. Med dette utgangspunktet vil mellomlederne kunne påvirke strategiske endringsprosesser. For å belyse denne problemstillingen har jeg valgt å undersøke hvordan mellomledere i kommunal helse – og ...
  • Effektivitetsanalyse og produktivitetsutvikling i norske sparebanker. En analyse av norske sparebanker for perioden 2014-2017 ved bruk av Data Envelopment Analysis og Malmquist produktivitetsindeks 

    Borkenhagen, Kristoffer (Master thesis; Mastergradsoppgave, 2021-02-26)
    Denne oppgaven analyserer effektivitet og effektivitetsutviklingen for norske sparebanker i perioden 2014-2017. Banknæringen i Norge reguleres av regjeringen i form av boliglånsforskrifter og andre regulatoriske krav. Banknæringen spiller en viktig samfunnsrolle for å tilby trygg og stabil finansiering til befolkningen. Datagrunnlaget for analysen er hentet fra Finans Norge sine årlige utgivelser ...
  • Hvor stor betydning har medarbeidersamtalen? En masteroppgave der vi undersøker hvordan ansatte i en norsk kommune vurderer medarbeidersamtalen 

    Eriksen, Anita; Bratteng, Siv (Master thesis; Mastergradsoppgave, 2018-06-01)
    <p>Fenomenet medarbeidersamtalen kan synes å ha en variert betydning blant ansatte som har benyttet slike samtaler. Med dette som utgangspunkt ønsket vi å undersøke <i>medarbeidersamtalen</i> og hvilken betydning denne faktisk har. Vår problemstilling ble derfor «Hvor stor betydning har medarbeidersamtalen»? For å få svar på dette ble ansatte i Harstad kommune valgt ut til å besvare spørsmål knyttet ...
  • Summer and winter MgCO3 levels in the skeletons of Arctic bryozoans 

    Iglikowska, Anna; Krzemińska, Małgorzata; Renaud, Paul Eric; Berge, Jørgen; Hop, Haakon; Kuklinski, Piotr (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-02)
    <p>In the Arctic, seasonal patterns in seawater biochemical conditions are shaped by physical, chemical, and biological processes related to the alternation of seasons, i.e. winter polar night and summer midnight sun. In summertime, CO<sub>2</sub> concentration is driven by photosynthetic activity of autotrophs which raises seawater pH and carbonate saturation state (Ω). In addition, restriction of ...
  • Caligus elongatus and other sea lice of the genus Caligus as parasites of farmed salmonids: A review 

    Hemmingsen, Willy; MacKenzie, Ken; Sagerup, Kjetil; Remen, Mette; Bloch-Hansen, Karin; Imsland, Albert (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-24)
    This review was prompted by reports of unusually large numbers of sea lice tentatively identified as <i>Caligus elongatus</i> infesting farmed salmon in northern Norway. Following a brief introduction to the sea lice problem in salmonid aquaculture, the review is divided into a further eight sections. The first is a review of existing information on the life cycle and behaviour of <i>Caligus</i> ...
  • Let it glow! Adapting a method to detect microplastics in snow and evaluate the potential for long-range transport 

    Stürzinger, Vegard (Master thesis; Mastergradsoppgave, 2020-05-31)
    Harmonization of methods in microplastics research is lacking; this is affecting the comparability of results and hindering reproducibility. Investigating microplastics in snow is a relatively new field of research, and it can be used to answer questions about long-range atmospheric transport of microplastics. In this thesis, snow sampling methods were combined with the dye, Nile Red, to develop a ...
  • Spring sea ice algal development in the sub-Arctic Ramfjorden, northern Norway 

    Persson, Emma (Master thesis; Mastergradsoppgave, 2020-05-29)
    The seasonal development of sea ice algae and bacteria was investigated in Ramfjorden, Norway, from February to April 2019 and compared to data from two Arctic fjords, Van Mijenfjorden and Billefjorden, sampled in April 2019. The sea ice in Ramfjorden was heavily freshwater influenced with bulk salinities ranging from 0.0 to 2.8, similar to those found in freshwater influenced Baltic Sea ice. The ...

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