Now showing items 1181-1200 of 1751

    • Biokjemiske egenskaper til grakse fra produksjon av Calanus® Oil 

      Sjøvoll, Anja (Master thesis; Mastergradsoppgave, 2017-05-15)
      Det er et stort behov for nye marine lipidkilder med et høyt innhold av LC-PUFA. Den store biomasseproduksjonen av raudåte (Calanus finmarchicus) i Norskehavet gjør den unik. Fra raudåte utvinner firmaet Calanus AS den kommersielle oljen Calanus® Oil. Gjennom prosessen dannes også to andre produkter, et proteinhydrolysat og en grakse (presskake). Det overordnede målet med masteroppgaven var å ...
    • Isolation and characterisation of secondary metabolites from arctic, marine invertebrates 

      Glomsaker, Eirin (Master thesis; Mastergradsoppgave, 2017-05-15)
      Bioprospecting is the systematic search for and discovery of products in nature, with the purpose of developing commercial products. The marine environment displays a rich biological diversity, as well as a diversity within environmental factors. This environment has necessitated the production of potent secondary metabolites by marine organisms in their arms race against predators and pathogens, ...
    • Kvalitet av vedlikeholdsfôret levendelagret torsk sultet i opptil 12 uker 

      Thomsen, Nicklaes Damkær (Master thesis; Mastergradsoppgave, 2017-05-15)
      For Norge og det norske folk har torskefiskeriet alltid vært en viktig næring. Dagens marked «oversvømmes» av torsk i årets første 4 måneder, og prisene på torsk er relativt lave i denne perioden. Et uttalt mål i Næringa er å kunne produsere ferske torskeprodukter gjennom hele året. Gjennom prøving og feiling har Næringa lært at ved å fange og lagre torsk levende i merder vil sesongen kunne forlenges. ...
    • The effect of semi-pelagic trawling on american plaice (hippoglossoides platessoides) by-catch reduction in the northeast arctic shrimp fishery 

      Sistiaga, Manu Berrondo; Grimaldo, Eduardo; Herrmann, Bent; Larsen, Roger B. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017)
      The present study reports results of a small-scale preliminary experiment to evaluate whether lifting trawl doors and sweeps from the seabed can lead to a reduction of by-catch in the Northeast Arctic shrimp trawl fishery. We carried out a catch comparison and catch ratio analysis between two gear configurations: one with trawl doors and sweeps on the seabed (traditional rigging) and the other with ...
    • Exploring the potential of two arctic marine bacteria for the production of bioactive metabolites 

      Jenssen, Marte (Master thesis; Mastergradsoppgave, 2017-05-15)
      The number of compounds being isolated from the marine environment is increasing, and there is a great potential for discovering new marine derived drug candidates. Improved collection techniques has strengthened bioprospecting on a wider diversity of marine microorganisms. The focus on microorganisms has led to the realisation that many of the natural products originally isolated from macroorganisms, ...
    • Exploring the antibacterial and anticancer potential of five marine fungi. With the use of OSMAC-approach 

      Bragmo, Hanne (Master thesis; Mastergradsoppgave, 2017-05-15)
      The marine environment is an untapped source for biodiversity and has a great potential to provide the drugs of the future. Antibiotic resistance is an increasing threat worldwide and the need for discovering new antibacterial compounds is urgent. Marine microorganisms produce a wide range of bioactive compounds, and marine fungi have only been exploited to a small extent. This creates a great ...
    • Beskrivelse av skadeomfanget på snøkrabbe (Chionoecetes opilio) ved interaksjon med bunntrål i Barentshavet 

      Gjesteland, Helene Mari (Master thesis; Mastergradsoppgave, 2017-05-15)
      Hensikten med dette studiet var å beskrive skadeomfanget på snøkrabbe (Chionoecetes opilio) ved interaksjon med torske- og reketrål i Barentshavet. Prøvene ble samlet inn på F/F Helmer Hanssen 10. – 30. november 2016 og 24. februar – 6. mars 2017 ved å simulere et kommersielt trålfiske etter torsk og reke, hvor bunntrål av typen Alfredo nr. 3 fisketrål, Egersund Polar 2800# reketrål og Campelen 1800# ...
    • Konflikthåndtering i kystsonen. Spildracaset 

      Klaussen, Kitty (Master thesis; Mastergradsoppgave, 2017-05-15)
      Konflikter knyttet til bruk av områder på land blir ofte håndtert gjennom eierskap. Den som eier et område (tomt) har stor frihet til selv å bestemme hva dette området skal brukes til. For områder hvor staten er eier eller eiendomsretten er uklar, vil konflikthåndtering kreve at samfunnet utvikler regler for bruk av slike områder. Slike regler vil ofte innebære at samfunnet vil prioritere mellom ...
    • Perceptions of socio-cultural beliefs and taboos among the Ghanaian fishers and fisheries authorities. A case study of the Jamestown fishing community in the Greater Accra Region of Ghana 

      Dosu, George (Master thesis; Mastergradsoppgave, 2017-05-15)
      Small scale Artisanal fishing accounts for majority of fish catches in Ghana and it is increasingly substantial to the traditional fishing communities of the country. The existence of fishing dependent communities in Ghana has predominantly been intertwined with the existence of socio-cultural beliefs and taboos. As an attempt to contribute to exploring how these socio-cultural beliefs and taboos ...
    • What is the true influence of the red tide on the production, price and marketing of the Galician mussel? 

      Martínez, Pablo Louzao (Master thesis; Mastergradsoppgave, 2017-08-14)
      In recent years, the Galician mussel industry has encountered an environmental factor capable of influencing its sea farming; the red tide. Its environmental and economic impact on mussel aquaculture is directly related to the duration of toxic processes. Therefore, in this work will be used the number of days of closure of production areas in order to analyze what is the true influence that red ...
    • Måling av pH i pre-rigor fiskemuskel. En analytisk utfordring 

      Skjold, Vetle (Master thesis; Mastergradsoppgave, 2017-11-14)
      I post mortem fiskemuskel kan måling av muskel-pH benyttes som en enkel metode for å vurdere både slakteprosedyre og kvaliteten på muskelkjøttet. Dette ettersom pH kan påvirke egenskaper som filetspalting, tekstur, fasthet, drypptap og farge. I de fleste studier er muskel-pH enten bestemt ved å måle direkte i intakt muskel med stikkelektrode, alternativet er å homogenisere muskel i en vannbasert ...
    • Studies on the stimulation of Atlantic salmon macrophage-like cells with emphasis on respiratory burst 

      Ulvestad, Johanne Skår (Master thesis; Mastergradsoppgave, 2017-11-15)
      Reactive oxygen species (ROS) production in macrophage-like cells is induced as an antimicrobial defence against invading pathogens. In this present study, we have explored how different stimuli and metabolic inhibitors affects the level of respiratory burst in Atlantic salmon (Salmo salar L.) head kidney macrophage-like cells. Cells stimulated in vitro by bacterial lipopolysaccharide (LPS) and ...
    • Betydning av varighet på kort dags (vinter) behandling på parr-smolt transformasjon og vekst etter sjøsetting hos Atlantisk laks 

      Blikeng, Børge Gellein (Master thesis; Mastergradsoppgave, 2017-11-15)
      Målsetningen i dette forsøket var å studere effekten av ulik varighet på vinterstimuli (kort dag) på smoltutvikling hos Atlantisk laks (Salmo salar L.), gjennom å kvantifisere utvikling av sjøvannstoleranse, gjelle Na+/K+-ATPase (NKA) aktivitet og morfometri (endring i kondisjonfaktor) under smoltifiseringen, samt vekst og fôrinntak i et påfølgende opphold i sjøvann. Parr-smolt transformasjonen, ...
    • Field sampling marine plankton for biodiscovery 

      Ingebrigtsen, Richard Andre; Hansen, Espen; Andersen, Jeanette Hammer; Eilertsen, Hans Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-20)
      Microalgae and plankton can be a rich source of bioactivity. However, induction of secondary metabolite production in lab conditions can be difficult. One simple way of bypassing this issue is to collect biomass in the field and screen for bioactivity. Therefore, bulk net samples from three areas along the coast of northern Norway and Spitsbergen were collected, extracted and fractionated. ...
    • Effekt av diett med ulike mengder langkjedede omega-3 fettsyrer på fettsyresammensetningen i plasma, røde blodlegemer og muskel, samt stressrespons, hos Atlantisk laks (Salmo salar L.) 

      Skagøy, Andreas (Master thesis; Mastergradsoppgave, 2016-11-08)
      Fem grupper presmolt Atlantisk laks (Salmo salar L.) ble gitt ulike dietter basert på fôr tilsatt enten EPA/DHA konsentrat (K), ansjosolje (AO) eller rapsolje (RO). Fôringsforsøket varte i 84 dager, hvor tre diettgrupper inngikk i et crossover forsøk. Gruppe 1 fikk en diett tilsatt K i 42 dager og deretter en diett tilsatt RO til dag 84, gruppe 2 fikk en diett tilsatt AO i 42 dager og deretter en ...
    • Report from fact-finding mission to Ghana 8-21 August 2015 

      Hersoug, Bjørn; Johnsen, Jahn Petter (Research report; Forskningsrapport, 2015)
      Over the years, 19 students from Ghana have graduated from the International Fisheries Management Programme (IFM) at the Norwegian College of Fishery Science (NCFS) at the University of Tromsø, the Arctic University of Norway. In addition, three other students from Ghana are in their first and second year of the programme now. These students are trained and supervised by professors with broad ...
    • Exploring the user-producer interface of weather and sea ice information for Arctic marine mobilities: a dedicated session at the Ninth International Congress on Arctic Social Sciences (ICASS) 

      Lamers, Machiel; Knol, Maaike; Ljubicic, Gita (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-29)
      At the International Congress on Arctic Social Sciences (ICASS IX) in Umeå, 8–12 June 2017, we organised a session to raise awareness and to involve other Arctic social scientists in the PPP-SERA agenda. The session focused on the user-producer interface of weather and sea ice information for Arctic marine sectors. In particular, we intended to discuss the complexities of actors, ...
    • Transcriptome analysis of plasmid-induced genes sheds light on the role of type I IFN as adjuvant in DNA vaccine against infectious salmon anemia virus 

      Sobhkhez, Mehrdad; Krasnov, Aleksei; Chang, Chia Jung; Robertsen, Børre (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-21)
      A previous study showed that a plasmid expressing IFNa (pIFNa) strongly enhanced protection and antibody production of a DNA vaccine against infectious salmon anemia virus (ISAV) in Atlantic salmon. The vaccine consisted of a plasmid (pHE) expressing the virus hemagglutinin-esterase as an antigen. To increase the understanding of the adjuvant effect of pIFNa, we here compared transcriptome responses ...
    • Antioxidant and Anti-Inflammatory Activities in Extracts from Minke Whale (Balaenoptera acutorostrata) Blubber 

      Walquist, Mari; Stormo, Svein Kristian; Jensen, Ida-Johanne; Østerud, Bjarne; Eilertsen, Karl-Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-08)
      Intake of long-chain omega-3 polyunsaturated fatty acids (LC-n3-PUFA) is commonly recognized to reduce cardiovascular disease (CVD). In previous studies, cold-pressed whale oil (CWO) and cod liver oil (CLO) were given as a dietary supplement to healthy volunteers. Even though CWO contains less than half the amount of LC-n3-PUFA of CLO, CWO supplement resulted in beneficial effects on anti-inflammatory ...
    • Expression of antimicrobial peptides in coelomocytes and embryos of the green sea urchin (Strongylocentrotus droebachiensis) 

      Li, Chun; Blencke, Hans-Matti; Haug, Tor; Jørgensen, Øyvind; Stensvåg, Klara (Journal article; Tidsskriftartikkel; Peer reviewed, 2013-11-12)
      Antimicrobial peptides (AMPs) play a crucial role in innate immunity. We have previously reported the isolation and characterization of the AMPs, strongylocins 1 and 2, and centrocin 1, from coelomocyte extracts of Strongylocentrotus droebachiensis. Here we show that these AMPs were expressed in phagocytes. In addition, transcripts of strongylocin 1 were detected in vibratile cells and/or colorless ...