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  • Effect of incubation temperature on eggs and larvae of lumpfish (Cyclopterus lumpus) 

    Imsland, Albert; Danielsen, Mathias; Jonassen, Thor Magne; Hangstad, Thor Arne; Falk-Petersen, Inger-Britt (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-24)
    Two batches of lumpfish eggs were incubated at three temperature regimes; 1-Ambient seawater 4–6 °C (cold), 2-Ambient seawater for 10 days followed by a gradual increase to 10 °C (gradient), 3-Constant 10 °C seawater (warm). The eggs incubated in cold water had the highest egg mortality (38.5% ± 15.7) and lowest hatching success (46.1% ± 7.2), while the gradient group regime showed highest hatching ...
  • Mesopelagic sound scattering layers of the high Arctic: Seasonal variations in biomass, species assemblage, and trophic relationships 

    Geoffroy, Maxime; Daase, Malin; Cusa, Marine Lure Joana; Darnis, Gérald; Graeve, Martin; Santana Hernadez, Nestor; Berge, Jørgen; Renaud, Paul Eric; Cottier, Finlo Robert; Falk-Petersen, Stig (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-12)
    Mesopelagic sound scattering layers (SSL) are ubiquitous in all oceans. Pelagic organisms within the SSL play important roles as prey for higher trophic levels and in climate regulation through the biological carbon pump. Yet, the biomass and species composition of SSL in the Arctic Ocean remain poorly documented, particularly in winter. A multifrequency echosounder detected a SSL north of Svalbard, ...
  • Ambient temperature effects on stress-induced hyperthermia in Svalbard ptarmigan 

    Nord, Andreas; Folkow, Lars (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-06-20)
    Stress-induced hyperthermia (SIH) is commonly observed during handling in homeotherms. However, in birds, handling in cold environments typically elicits hypothermia. It is unclear whether this indicates that SIH is differently regulated in this taxon or if it is due to size, because body temperature changes during handling in low temperatures have only been measured in small birds <0.03 kg (that ...
  • Terrestrial locomotion of the Svalbard rock ptarmigan: comparing field and laboratory treadmill studies 

    Marmol-Guijarro, Andres C; Nudds, Robert L.; Marrin, John C; Folkow, Lars; Codd, Jonathan R (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-08-07)
    Research into the terrestrial locomotion of birds is often based upon laboratory treadmill experiments. However, it is unclear how transposable these results are for birds moving in the wild. Here, using video recordings, we compared the kinematics of locomotion (stride frequency, stride length, stance phase, swing phase, duty factor) and speed range of Svalbard rock ptarmigan (<i>Lagopus muta ...
  • Responsible for responsibility? A study of digital e-health startups 

    Oftedal, Elin Merethe; Foss, Lene; Iakovleva, Tatiana Aleksandrovna (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-09-30)
    Responsible innovation (RI) has received increased attention from policymakers and academics as a solution to grand challenges and is viewed as the main driver for innovation. The United Nations has suggested 17 Sustainable Development Goals and responsible innovation can be seen as a tool that allows the movement of society towards reducing inequality, coping with environmental challenges and ...
  • Structural Breaks or Continuous Adjustments in Grain Production and Prices 1961-2014? An Explorative Study 

    Fretheim, Torun (Journal article; Tidsskriftartikkel, 2019-06-30)
    This article analyses grain production and prices 1961-2014. We first describe the development in aggregated and relative allocation of land worldwide for wheat, corn and soybeans, and the growth in production volumes and yields. We then proceed by analyzing long-term price relationships. Finding that grain prices are strongly co-integrated, we estimate an Error Correction Model to see whether ...
  • The epidemiology of zoonotic brucellosis in Bahr el Ghazal region of South Sudan 

    Madut, Nuol Aywel; Muleme, James; Kankya, Clovice; Nasinyama, George William; Muma, John Bwalya; Godfroid, Jacques; Jubara, Ambrose Samuel; Muwonge, Adrian (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-06-26)
    <p><i>Background - </i>In this study, we focused on three zoonotic brucellosis risk groups; abattoir workers, febrile cases at Wau hospital and cattle herders, in Bahr el Ghazal region, South Sudan. Competitive c-ELISA was used to detect anti-<i>Brucella</i> antibodies in 725 individuals between December 2015 and May 2016. In addition, questionnaire metadata, focus group discussions and key informant ...
  • Phylogenetic Reclassification of Vertebrate Melatonin Receptors To Include Mel1d 

    Denker, Elsa; Ebbesson, Lars O.E.; Hazlerigg, David; Macqueen, Daniel J. (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-01)
    The circadian and seasonal actions of melatonin are mediated by high affinity G-protein coupled receptors (melatonin receptors, MTRs), classified into phylogenetically distinct subtypes based on sequence divergence and pharmacological characteristics. Three vertebrate MTR subtypes are currently described: MT1 (MTNR1A), MT2 (MTNR1B), and Mel1c (MTNR1C / GPR50), which exhibit distinct affinities, ...
  • Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish 

    Cusa, Marine Lure Joana; Berge, Jørgen; Varpe, Øystein (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-09-21)
    Species with a broad and flexible diet may be at an advantage in a rapidly changing environment such as in today's Arctic ecosystems. Polar cod (<i>Boreogadus saida</i>), an abundant and ecologically important circumpolar Arctic fish, is often described as a zooplankton generalist feeder, which suggests that it may cope successfully with changes in prey composition. This description is justified ...
  • The PI3K and MAPK/p38 pathways control stress granule assembly in a hierarchical manner 

    Heberle, Alexander Martin; Razquin Navas, Patricia; Langelaar-Makkinje, Miriam; Kasack, Katharina; Sadik, Ahmed; Faessler, Erik; Hahn, Udo; Marx-Stoelting, Philip; Opitz, Christiane A.; Sers, Christine; Heiland, Ines; Schaeuble, Sascha; Thedieck, Kathrin (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-03-28)
    All cells and organisms exhibit stress-coping mechanisms to ensure survival. Cytoplasmic protein-RNA assemblies termed stress granules are increasingly recognized to promote cellular survival under stress. Thus, they might represent tumor vulnerabilities that are currently poorly explored. The translation-inhibitory eIF2α kinases are established as main drivers of stress granule assembly. Using a ...
  • Multi-pathogen serological survey of migratory caribou herds: A snapshot in time 

    Carlsson, Anja M.; Curry, Patricia S.; Elkin, Brett T.; Russell, Donald E.; Veitch, Alasdair M.; Branigan, Marsha; Campbell, Mitch; Croft, Bruno; Cuyler, Christine; Côté, Steeve D.; Leclerc, Lise-Marie; Tryland, Morten; Nymo, Ingebjørg Helena; Kutz, Susan J. (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-31)
    Pathogens can impact host survival, fecundity, and population dynamics even when no obvious disease is observed. Few baseline data on pathogen prevalence and diversity of caribou are available, which hampers our ability to track changes over time and evaluate impacts on caribou health. Archived blood samples collected from ten migratory caribou herds in Canada and two in Greenland were used to test ...
  • Catch-based aquaculture in Norway - Institutional challenges in the development of a new marine industry 

    Sønvisen, Signe Annie; Standal, Dag (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-03-12)
    Catch-based aquaculture (CBA) is an important production system in many parts of the world, especially in developing countries. In Norway CBA is based on capture and storage/farming of mature, North-east Atlantic (NEA) cod (Gadus morhua). The objective is to reduce seasonal variations and add value, by storing/farming fish to take advantage of higher prices in low seasons. Despite numerous development ...
  • Are Asian fresh and brackish water aquaculture production vulnerable or resilient towards climate change impacts? 

    Nadarajah, Suthamathy; Eide, Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-18)
    This study analyzes fresh and brackish water aquacultures—especially carp, tilapia, and shrimp production—in major Asian aquaculture-producing countries. Different indicators have been used, involving dimensions that may be affected by climate change. High diversity is believed to indicate high adaption capacity, while resilience is estimated by known biological properties of each species. The results ...
  • Områdesamarbeid i norsk havbruk 

    Karlsen, Kine Mari; Robertsen, Roy; Hersoug, Bjørn; Tveterås, Ragnar; Osmundsen, Tonje Cecilie (Research report; Forskningsrapport, 2019-11-29)
    Rapporten beskriver funn fra områdesamarbeid i norsk havbruk i FHF-prosjektet "Havbruksforvaltning 2030". I denne studien er områdesamarbeid definert som "Samarbeid mellom to eller flere næringsaktører i havbruk innenfor et definert geografisk område". Målet med studien er å vurdere ulike former for områdesamarbeid, hvordan områdesamarbeid kan organiseres, samt å gjøre faglige betraktninger om ...
  • Avløp og oppdrettsanlegg som mulige forurensningskilder til mikroplast i blåskjell (Mytilus edulis) 

    Johnsen, Ingunn Solheim (Master thesis; Mastergradsoppgave, 2019-05-14)
    De siste 60 årene har masseproduksjonen av plast økt (Barnes et al., 2009) og lite tyder på at produksjonen av plast vil avta med det første på grunn av de samme egenskapene som gjør at plast er farlig på avveie; det er et slitesterkt materiale og vi kjenner ikke fullstendig til konsekvensene eller nedbrytningsforløpet av det. Mikroplast er små plastpartikler som kan komme fra mange ulike ...
  • Quality aspects of wild caught and enhanced sea urchins (Strongylocentrotus droebachiensis) 

    Sætra, Ingeborg Mathisen (Master thesis; Mastergradsoppgave, 2019-05-13)
    Sea urchin roe is a culinary delicacy worldwide, but with global catches are down due to overfishing and diminishing stocks, interest in aquaculture has increased. Sea urchin aquaculture lacks consistency in the quality of the product, good quality sea urchin roe should be large with an orange or yellow colour, with a distinct sweet-salty taste and have the right firm texture. The main objective ...
  • Fish communities in shallow coastal waters - a study of effects of season and bottom substrate 

    Sørensen, Ole Johannes Ringnander (Master thesis; Mastergradsoppgave, 2019-05-13)
    Fish communities in the outer part of Malangen fjord, Troms county were studied to identify seasonal and spatial variation. The fish species compositions differed between seasons and at the four different locations. Cod (Gadus morhua L.) dominated the trammel net catches at all months except in March, in which plaice and other flatfishes were the most numerous. Species richness and diversity were ...
  • Hvilke ressurser kan små fiskeindustribedrifter mobilisere for å sikre seg råstoff? – En studie av relasjon mellom fiskefartøy og fiskeindustrien. 

    Gamst, Jørgen; Jenssen, Steinar (Master thesis; Mastergradsoppgave, 2019-05-14)
    I Tromsø kommune finnes et mangfold av små fiskeindustribedrifter som befinner seg i en industri preget av stor konkurranse og begrensede ressurser. I tillegg er det stor usikkerhet rundt tilgang på råstoff noe som legger press på fiskeindustribedriftene. I denne næringen er det derfor essensielt å kunne mobilisere de riktige ressursene for å gjøre seg attraktiv for fiskefartøyene slik at denne ...
  • Kvotefordeling av norsk vårgytende sild og havretten. Med særlig vekt på rettshistoriske, rettsdogmatiske og rettspolitiske forhold 

    Jensen, Ann-Kristin Fallmyr (Master thesis; Mastergradsoppgave, 2018-12-02)
    Masterprosjektet presenterer en rettshistorisk, rettsdogmatisk og rettspolitisk analyse av kvotefordelingen av norsk vårgytende sild. De involverte parter er Norge, Russland, EU, Island og Færøyene. Er det slik at multilaterale avtaler om norsk vårgytende sild ikke vil lykkes dersom kvoteandeler tildelt deltakende land er vesentlig mindre enn den mengde fisk som staten kan fiske innenfor sin ...
  • Mikroplast i utvalgt sjømat og andre marine produkter i Norge 

    Stensen, Linda Sjøvold (Master thesis; Mastergradsoppgave, 2018-11-30)
    I det seneste tiåret har det menneskeskapte plastmaterialet til stadighet blitt trukket frem som den største og raskest voksende miljøutfordringen verden står ovenfor. Undersøkelser har vist at mikroplasten er utbredt i alle havnivåer fra bunn til havoverflate i alle verdenshavene. På bakgrunn av alle rapporter og publikasjoner om plast i havet har det vokst frem bekymringer for at mennesker skal ...

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