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  • Porosira glacialis as a possible source of lipids for human consumption and aquaculture feed 

    Dalheim, Lars (Doctoral thesis; Doktorgradsavhandling, 2021-05-20)
    Det er et stort behov for marine langkjedede omega-3 fettsyrer både til humant konsum og til fiskefôr. De langkjedede omega-3 fettsyrene EPA og DHA har gunstige helseeffekter for både mennesker og fisk. Mengden villfanget fisk har de siste 40 årene nådd maksimal utnyttelse mens volumet av oppdrettsfisk har økt betraktelig. Mangelen på marint råstoff har ført til en økt andel terrestrisk råstoff i ...
  • Sustainable Business Models: A Systematic Review of Approaches and Challenges in Manufacturing 

    Agwu, Ukeje Jacob; Bessant, John Robert (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-12)
    Objective: there is an ongoing need for businesses to strive to maintain ideals within environmental, economic, and social values — commonly known as the triple bottom line. Manufacturing as a sector has advanced drastically and the literature on sustainable business models in this sector has emerged. The purpose of this paper is to analyze sustainable business models in manufacturing and the ...
  • 20 Years of Nordic tourism economics research: a review and future research agenda 

    Falk, Martin; Tveteraas, Sigbjørn Landazuri; Xie, Jinghua (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-13)
    The number of economics-related articles in the Scandinavian Journal of Hospitality and Tourism (SJHT) has recently increased considerably. Despite this increase, the research efforts of Nordic economists on tourism issues have lagged behind in an international comparison. The recent increase in the number of economics-related publications in SJHT is due to better access to microdata (individual and ...
  • Shopping value, trust, and online shopping well-being: a duality approach 

    Nghia, Ho Trong; Olsen, Svein Ottar; Trang, Nguyen Thi Mai (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-03)
    <i>Purpose</i> - Based on a duality approach, this study examines the path from utilitarian value via cognitive trust versus hedonic value via affective trust in online shopping well-being. This study also explores the moderating role of extraversion in the relationships between shopping value and trust.<p> <p><i>Design/methodology/approach</i> - A data set collected from 648 online consumers in ...
  • Haematology and clinical blood chemistry in harbour porpoises (Phocoena phocoena) from the inner Danish waters 

    Siebert, Ursula; Blanchet, Marie-Anne; Teilmann, Jonas; Anderson Hansen, Kirstin; Kristensen, Jakob; Bunskoek, Paulien; Dietz, Rune; Desforges, Jean-Pierre; Sonne, Christian; Desportes, Geneviève (Journal article; Tidsskriftartikkel, 2020-07-13)
    Harbour porpoises (<i>Phocoena phocoena</i>) in the Baltic Sea are under increasing pressure from anthropogenic activities, which affect the overall health of populations. Individuals’ haematologic and biochemistry parameters are known to be linked to a population’s health status and are therefore useful tools for cross-population comparisons and to assess health patterns of a population through ...
  • Strong migratory connectivity across meta-populations of sympatric North Atlantic seabirds 

    Merkel, Benjamin; Descamps, Sebastien; Yoccoz, Nigel; Grémillet, David; Fauchald, Per; Danielsen, Jóhannis; Daunt, Francis; Erikstad, Kjell E.; Ezhov, Aleksey V.; Harris, Mike P.; Gavrilo, Maria; Lorentsen, Svein-Håkon; Reiertsen, Tone Kristin; Systad, Geir Helge Rødli; Thórarinsson, Thorkell Lindberg; Wanless, Sarah; Strøm, Hallvard (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-04)
    Identifying drivers of population trends in migratory species is difficult, as they can face many stressors while moving through different areas and environments during the annual cycle. To understand the potential of migrants to adjust to perturbations, it is critical to study the connection of different areas used by different populations during the annual cycle (i.e. migratory connectivity). ...
  • Stomping in silence: Conceptualizing trampling effects on soils in polar tundra 

    Tuomi, Maria; Väisänen, Maria; Ylänne, H; Brearley, Francis Q.; Barrio, Isabel C.; Bråthen, Kari Anne; Eischeid, Isabell; Forbes, Bruce C.; Jónsdóttir, Ingibjörg; Kolstad, Anders Lorentzen; Macek, Petr; Petit Bon, Matteo; Speed, James David Mervyn; Stark, Sari; Svavarsdóttir, Kristin; Thorsson, Johann; Bueno, C. Guillermo (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-24)
    <ol> <li>Ungulate trampling modifies soils and interlinked ecosystem functions across biomes. Until today, most research has focused on temperate ecosystems and mineral soils while trampling effects on cold and organic matter‐rich tundra soils remain largely unknown.</li><p> <p><li>We aimed to develop a general model of trampling effects on soil structure, biota, microclimate and biogeochemical ...
  • Implications of increasing Atlantic influence for Arctic microbial community structure 

    Carter-Gates, Michael; Balestreri, Cecilia; Thorpe, Sally E.; Cottier, Finlo Robert; Baylay, Alison; Bibby, Thomas S.; Moore, C. Mark; Schroeder, Declan C. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-06)
    Increasing influence of Atlantic water in the Arctic Ocean has the potential to significantly impact regional water temperature and salinity. Here we use a rDNA barcoding approach to reveal how microbial communities are partitioned into distinct assemblages across a gradient of Atlantic-Polar Water influence in the Norwegian Sea. Data suggest that temperate adapted bacteria may replace cold water ...
  • Administration of watermelon rind powder to Nile tilapia (Oreochromis niloticus) culture under biofloc system: Effect on growth performance, innate immune response, and disease resistance 

    Doan, Hien Van; Lumsangkul, Chompunut; Hoseinifar, Seyed Hossein; Hung, Tran Quang; Stejskal, Vlastimil; Ringø, Einar; Dawood, Mahmoud A.O.; Esteban, Maria Ángeles (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-07)
    An eight-week experiment was performed to assess the effectiveness of watermelon rind powder (WMRP) on growth efficiency, immunity, and disease resistance of Nile tilapia, <i>O. niloticus</i>. Three hundred fish (17.14 ± 0.12 g) were fed five diets; 0 (Diet 1- control), 20 g kg<sup>−1</sup> WMRP (Diet 2), 40 g kg<sup>−1</sup> WMRP (Diet 3), 80 g kg<sup>−1</sup> WMRP (Diet 4), and 160 g kg<sup>−1</sup> ...
  • Comparison of functional diversity of two alaskan arctic shelf epibenthic communities 

    Sutton, Lauren; Iken, Katrin; Bluhm, Bodil; Mueter, Franz J. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-01)
    Alaskan Arctic shelf communities are currently experiencing dramatic changes that will likely affect ecosystem functioning of Arctic marine benthic communities. Here, functional diversity based on biological traits was used to assess differences and similarities in ecosystem functioning between 2 shelf systems that are geographically close but vary in many environmental influences: the Arctic Beaufort ...
  • Pathogen surveillance in Southern Ocean pinnipeds 

    Núñez-Egido, Sandra; Lowther, Andrew; Nymo, Ingebørg H.; Klein, Jörn; Breines, Eva Marie; Tryland, Morten (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-17)
    Knowledge of the health status and potential effect of disease outbreaks among Southern Ocean fauna may be decisive for its conservation. We assessed the exposure and infection of Antarctic fur seals (<i>Arctocephalus gazella</i>, AFS) and Southern elephant seals (<i>Mirounga leonine</i>, SES) to parapoxvirus, <i>Phocid alphaherpesvirus-1</i> (PhHV-1), smooth <i>Brucella</i> spp. and <i>Toxoplasma ...
  • Thee level of eicosapentaenoic (EPA),but not docosahexaenoic acid (DHA) is related to formulation and concentration of EPA and DHA in feed 

    Seternes, Tore; Johansson, Gunhild S.; Evje, Iselin; Olsen, Ragnar Ludvig (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-22)
    The present study investigated how the concentration of PUFA in blood and muscle of Atlantic salmon (<i>Salmo salar</i> L.) changed when fed 4 diets containing very different amounts of LC-PUFA in fresh water for 84 days. The n-3 LC-PUFA constituted 4.4, 24.2, 18.4, and 51.5% of the total fatty acids in the diets made with rapeseed oil, anchoveta oil, a combination of rapeseed oil (60%) and anchoveta ...
  • Seasonal dietary shifts enhance parasite transmission to lake salmonids during ice cover 

    Prati, Sebastian; Henriksen, Eirik Haugstvedt; Knudsen, Rune; Amundsen, Per-Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-08)
    Changes in abiotic and biotic factors between seasons in subarctic lake systems are often profound, potentially affecting the community structure and population dynamics of parasites over the annual cycle. However, few winter studies exist and interactions between fish hosts and their parasites are typically confined to snapshot studies restricted to the summer season whereas host‐parasite dynamics ...
  • Constructing managerial manoeuvring space in contradictory contexts 

    Filstad, Cathrine; Olsen, Trude Høgvold; Karp, Tom (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-17)
    This paper discusses manoeuvring space and demonstrates how autonomy, power and discretion need to be understood as constructed and integrated behaviours where managers manoeuvre between dilemmas in their own management practices. Twenty-seven Norwegian police managers were shadowed and interviewed. We found that constructions of manoeuvring space presupposed that managers balanced dilemmas. We ...
  • Towards mass cultivation of diatoms as a source of marine lipids 

    Svenning, Jon Brage (Doctoral thesis; Doktorgradsavhandling, 2021-04-23)
    The global demand for the long-chain omega-3 fatty acids EPA and DHA is increasing, and the traditional sources of these fatty acids, fish oils, are no longer able to sustain the demand. This shortage is mainly a result of the surging requirement of EPA and DHA as ingredients in fish feed for aquaculture, and as dietary supplements for human consumption. As a result, there is an increased interest ...
  • Photoperiodic history-dependent preadaptation of the smolting gill. Novel players and SW immediate response as markers of growth and welfare 

    Iversen, Marianne (Doctoral thesis; Doktorgradsavhandling, 2021-04-16)
    This thesis presents a rich introduction to the evolution, life history and physiology of Atlantic salmon, with a special emphasis on the developmental transitions (termed smolting) juvenile salmon pass through has they prepare to migrate from their native freshwater habitat to the sea. The introduction provides a comprehensive background on chronobiology and osmoregulation in fishes and links this ...
  • Circadian-based processes in the High Arctic: activity, thermoregulation and photoperiodism in the Svalbard ptarmigan (Lagopus muta hyperborea) 

    Appenroth, Daniel (Doctoral thesis; Doktorgradsavhandling, 2021-04-15)
    <p>This thesis addresses aspects of the circadian and photoperiodic system in a High Arctic bird: the Svalbard ptarmigan (<i>Lagopus muta hyperborea</i>, Sundevall 1845). The most northern resident bird inhabits a unique photic environment; 2/3 of its year it spends either under a night without sunrise (polar night) or under a never setting Sun (polar day). Studies so far suggest a temporal loss of ...
  • Salmonid Alphavirus Subtype 3 Induces Prolonged Local B Cell Responses in Atlantic Salmon (Salmo salar) After Intraperitoneal Infection 

    Jenberie, Shiferaw; Penaranda, Ma Michelle Demogina; Thim, Hanna Leena; Styrvold, Morten Bay; Strandskog, Guro; Jørgensen, Jorunn B; Jensen, Ingvill (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-10)
    B cell responses are a crucial part of the adaptive immune response to viral infection. Infection by salmonid alphavirus subtype 3 (SAV3) causes pancreas disease (PD) in Atlantic salmon (<i>Salmo salar</i>) and is a serious concern to the aquaculture industry. In this study, we have used intraperitoneal (IP) infection with SAV3 as a model to characterize local B cell responses in the peritoneal ...
  • Decades of Recovery From Sheep Grazing Reveal No Effects on Plant Diversity Patterns Within Icelandic Tundra Landscapes 

    Mörsdorf, Martin Alfons; Ravolainen, Virve; Yoccoz, Nigel; Thórhallsdóttir, Thóra Ellen; Jónsdóttir, Ingibjörg Svala (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-26)
    Tundra plant communities are often shaped by topography. Contrasting wind exposure, slopes of different inclination and landforms of different curvature affect habitat conditions and shape plant diversity patterns. The majority of tundra is also grazed by ungulates, which may alter topographically induced plant diversity patterns, but such effects may depend on the spatial scales of assessments. ...
  • On rational forward-looking behavior in economic geography: An experimental analysis 

    Barreda-Tarrazona, Iván; Kundu, Tapas; Østbye, Stein (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-05)
    This paper adapts the canonical New Economic Geography model for experimental testing of the model's behavioral assumptions by developing a finite-player, finite-horizon dynamic game of migration. Our analysis gives distinctive predictions when migration is consistent with myopic behavior (MB) and when it is consistent with sequentially rational or perfect forward-looking behavior (FB). These ...

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