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  • Can vertical separation of species in trawls be utilized to reduce bycatch in shrimp fisheries? 

    Larsen, Roger B.; Herrmann, Bent; Brcic, Jure; Sistiaga, Manu; Cerbule, Kristine; Nielsen, Kåre Nolde; Jacques, Nadine; Lomeli, Mark Joseph Max; Tokac, Adnan; Cuende, Elsa (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-26)
    Several shrimp trawl fisheries use a Nordmöre sorting grid to avoid bycatch of fish. However, small fish can pass through the grid. Therefore, the retention of juvenile fish often remains an issue during shrimp trawling. We investigated the vertical distribution of deepwater shrimp (<i>Pandalus borealis</i>) and dominant bycatch species at the point where the Nordmöre grid section is installed. This ...
  • Modeling silicate–nitrate–ammonium co-limitation of algal growth and the importance of bacterial remineralization based on an experimental Arctic coastal spring bloom culture study 

    Vonnahme, Tobias; Leroy, Martial; Thoms, Silke; van Oevelen, Dick; Harvey, Rodger; Kristiansen, Svein; Gradinger, Rolf; Dietrich, Ulrike; Völker, Christoph (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-11)
    Arctic coastal ecosystems are rapidly changing due to climate warming. This makes modeling their productivity crucially important to better understand future changes. System primary production in these systems is highest during the pronounced spring bloom, typically dominated by diatoms. Eventually the spring blooms terminate due to silicon or nitrogen limitation. Bacteria can play an important role ...
  • Terrestrial Inputs Shape Coastal Bacterial and Archaeal Communities in a High Arctic Fjord (Isfjorden, Svalbard) 

    Delpech, Lisa-Marie; Vonnahme, Tobias; Mcgovern, Maeve; Gradinger, Rolf; Præbel, Kim; Poste, Amanda (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-26)
    The Arctic is experiencing dramatic changes including increases in precipitation, glacial melt, and permafrost thaw, resulting in increasing freshwater runoff to coastal waters. During the melt season, terrestrial runoff delivers carbon- and nutrient-rich freshwater to Arctic coastal waters, with unknown consequences for the microbial communities that play a key role in determining the cycling and ...
  • Genome editing on finfish: Current status and implications for sustainability 

    Blix, Torill Pauline Bakkelund; Dalmo, Roy Ambli; Wargelius, Anna; Myhr, Anne Ingeborg (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-26)
    Novel genome editing techniques allow for efficient and targeted improvement of aquaculture stock and might be a solution to solve challenges related to disease and environmental impacts. This review has retrieved the latest research on genome editing on aquacultured finfish species, exploring the technological progress and the scope. Genome editing has most often been used on Nile tilapia (<i>Oreochromis ...
  • Praksis som læringsform i studier uten profesjonstilknytning - utfordringer og muligheter 

    Finstad, Bjørn-Petter; Sandvoll, Ragnhild; Lien, Ingrid Hovda (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-28)
    Hvilke muligheter og utfordringer kan oppstå med praksis som læringsform i utdanninger som ikke er spesifikt profesjonsrettet? I profesjonsutdanninger deler praksisvirksomhetene og utdanningsinstitusjonene ofte en felles forståelse av hva som skal oppnås i praksis, mens i ikke-profesjonsrettede studieløp er det andre utfordringer. I et nylig oppstartet prosjekt som heter «Samarbeid om praksis i ...
  • Analysis across diverse fish species highlights no conserved transcriptome signature for proactive behaviour 

    Rey, Sonia; Jin, Xingkun; Damsgård, Børge; Bégout, Marie-Laure; MacKenzie, Simon (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-07)
    <p>Background: Consistent individual differences in behaviour, known as animal personalities, have been demonstrated within and across species. In fish, studies applying an animal personality approach have been used to resolve variation in physiological and molecular data suggesting a linkage, genotype-phenotype, between behaviour and transcriptome regulation. In this study, using three fish species ...
  • Framing Sustainable Exports in Theory and Practice 

    Engelseth, Per; Glavee-Geo, Richard (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-26)
    Increasingly exporters need to take into consideration sustainable exports. This paper is an academic exercise that seeks to develop an analytical framework to demonstrate sustainable exports as a market embedded inter-organisational function. Influences of this investigation include institutional economics and sociology. The developed framework guides investigation of three published cases of ...
  • 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 ...
  • Influence of Arctic light conditions on crop production and quality 

    Mølmann, Jørgen A; Dalmannsdottir, Sigridur; Hykkerud, Anne Linn; Hytönen, Timo; Samkumar, Amos; Jaakola, Laura (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-10)
    The natural light conditions above the Arctic Circle are unique in terms of annual variation creating special growth conditions for crop production. These include low solar elevations, very long daily photosynthetic light periods, midnight sun/absence of dark nights, and altered spectral distribution depending on solar elevation. All these factors are known to affect the growth and the metabolism ...
  • 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 ...

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