Blar i tittel Norges fiskerihøgskole

Viser treff 834-853 av 1563

    • Intra- and inter-temporal effort allocation and profit-maximizing strategy of trawl fishery 

      Alizadeh, Tannaz; Abe, Keita (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-04)
      Bottom trawlers are engaged in multi-species fisheries and fish for profit. In quota-regulated fisheries, intra- and inter-temporal substitutions of fishing effort is regarded as a key mechanisms that influences the profitability of the fishing portfolio. The feeding and spawning migration patterns of the available fish species in the fishing portfolio alter the bio-economic conditions of the different ...

    • Intracellular distribution and transcriptional regulation of Atlantic salmon (Salmo salar) Rab5c, 7a and 27a homologs by immune stimuli 

      Nepal, Arpita; Wolfson, Deanna; Ahluwalia, Balpreet Singh; Jensen, Ingvill; Jørgensen, Jorunn B; Iliev, Dimitar Borisov (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-31)
      Rab GTPases control trafficking of intracellular vesicles and are key regulators of endocytic and secretory pathways. Due to their specific distribution, they may serve as markers for different endolysosomal compartments. Since Rab GTPases are involved in uptake and trafficking of endocytosed ligands and cell receptors, as well as secretion of immune mediators, they have been implicated in diverse ...

    • Introducing insect-based salmon feed. From a nutritional, economic, legal and marketing perspective 

      Govaerts, Florent (Master thesis; Mastergradsoppgave, 2018-05-15)
      The expansion of the aquaculture sector around the world has resulted in a growth of the demand for fishmeal (FM). Due to the limited sea resources, the price of FM has risen significantly in past years pushing the sector to find substitutes. In this context, insects attract more and more industrial and scientific attention as they have many advantages. First, with around one million species estimated, ...

    • Introduction to the themed issue - Poststructural approaches to fisheries 

      Mather, Charles; Johnsen, Jahn Petter; Sønvisen, Signe Annie; Sridhar, Aarthi; Stephen, Johny (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-15)
      This themed issue of papers for Maritime Studies emerges out of a special session of the MARE 2015 conference held in Amsterdam. The aim of this Introduction is to provide a brief background to poststructural scholarship drawing on examples and cases from research on fisheries. We argue that a poststructural sensibility has made an important impact on scholars interested in fisheries issues even ...

    • Investigating Beyond the Scales. Interactive governance analysis of small-scale fisheries in the San Andrés Archipelago, Colombia 

      Randin, Olivier (Master thesis; Mastergradsoppgave, 2013-08-15)
      Small-scale fisheries are complex, diverse and dynamic. Therefore, to understand these fisheries, governance is favoured to management as a more comprehensive analytical framework that aims to catch issues and challenged beyond the technical aspects of management. Following a phronesis approach, embedding theory into reality, I chose the case study of the small-scale fisheries of the San Andrés ...

    • Investigating fish behavioural responses to LED lights in trawls and potential applications for bycatch reduction in the Nephrops-directed fishery 

      Melli, Valentina; Krag, Ludvig Ahm; Herrmann, Bent; Karlsen, Junita Diana (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04-18)
      Light-emitting diodes (LEDs) have been tested in trawl fisheries to reduce the bycatch of unwanted species through behavioural stimulation. Previous studies used LED lights to either highlight escaping routes or increase the contact rate with square-mesh panels. However, phototactic responses (moving towards or away from light sources) to LED lights could also be exploited to separate species during ...

    • IPNV with high and low virulence: host immune responses and viral mutations during infection 

      Skjesol, Astrid; SkjÆveland, ingrid; Elnæs, Marianne; Timmerhaus, Gerrit Frantz; Fredriksen, Børge Nilsen; Jørgensen, Sven Martin; Krasnov, Aleksei; Jørgensen, Jorunn B (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      Infectious pancreatic necrosis virus (IPNV) is an aquatic member of the Birnaviridae family that causes widespread disease in salmonids. IPNV is represented by multiple strains with markedly different virulence. Comparison of isolates reveals hyper variable regions (HVR), which are presumably associated with pathogenicity. However little is known about the rates and modes of sequence divergence and ...

    • Is capture-based aquaculture viable? The case of Atlantic cod in Norway 

      Pettersen, Ingrid Kristine; Asche, Frank; Bronnmann, Julia; Sogn-Grundvåg, Geir; Straume, Hans-Martin (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-25)
      Capture-based aquaculture (CBA) is an important branch of the aquaculture industry that differs from closed cycle farming in that the stocking material consists of captured wild fish or other aquatic organisms. By skipping the difficult early production stages of fish farming, producers can test whether assumed market advantages such as high quality and consistent supply result in higher prices – ...

    • Is fisheries governance possible? 

      Johnsen, Jahn Petter (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-02-11)
      Are there limits to the governability of a fishery? The establishment of a 200 nautical mile economic zone in Norway in 1977 made it possible to change from an open-access regime to a more closed one. In this process, the former self-regulating Norwegian fishing industry, to a large extent, accepted and adapted an explicit, hierarchical form of state-run governance. However, the process of change ...

    • Is fisheries policy driving rural depopulation? Exploring how the implementation of the quota management system has affected rural settlement structures in Iceland 

      Víðisson, Magnús (Master thesis; Mastergradsoppgave, 2020-06-05)
      Iceland has been dependent on the ocean and the resources found within it for centuries. With greater technology and fishing effort in the past decades, overfishing had become a serious threat to the nation’s largest commercial stocks. This development led to restrictions on the fisheries which later led to the implementation of the ITQ system. Fisheries in Iceland are conducted with sustainability ...

    • Is the Sri Lankan ecotourism industry threatened by climate change? A case study of Rekawa coastal wetland using contingent visitation approach 

      Salpage, Nesha Dushani; Aanesen, Margrethe; Amarasinghe, Oscar (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-12-02)
      This study investigates intended visitation behavior of tourists toward Rekawa wetland under anticipated climate change (CC) scenarios. An interview-based contingent visitation survey was conducted with 365 foreign and domestic tourists to estimate the effects of CC on future visitation. Based on two IPCC scenarios using two direct and three indirect climatic factors, we composed a CC environmental ...

    • Is there a limit to the potential effects of shortening lastridge ropes on the size selectivity of diamond mesh codends? 

      Sistiaga, Manu; Herrmann, Bent; Brinkhof, Jesse; Larsen, Roger B.; Santos, Juan; Stepputtis, Daniel; Brinkhof, Ilmar; Jacques, Nadine; Cerbule, Kristine; Petetta, Andrea; Cuende, Elsa; Kvalvik, Liz Beate Kolstad (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-21)
      Shortening codend lastridge ropes can be an effective fishing gear modification to improve the size selection properties in diamond mesh codends. Lastridge ropes attached to codend selvedges withstand the longitudinal forces created by the catch building up and therefore, prevent the codend meshes from closing. However, the extent to which the lastridge ropes should be shortened to maximize the ...

    • Islagring av torsk (Gadus morhua) og brosme (Brosme brosme) : Har brosme spesiell lang holdbarhet? 

      Eilertsen, Steinar (Master thesis; Mastergradsoppgave, 2008-06-05)
      Torsk og brosme er viktige råstoff for produksjon av konvensjonelle produkter som tørrfisk og saltfisk. Begge er torskefisker, men en stor forskjell er at brosme vanligvis skiller ut mye mer slim fra skinnet enn torsk etter slakting. Kvalitetsforskriftene tillater brosme å islagres i 15 dager før produksjon av for eksempel tørrfisk, mens grensen for torsk er 12 dager. I perioder har det til og med ...

    • 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, ...

    • Isolation and characterization of antimicrobial peptides with unusual disulfide connectivity from the colonial ascidian Synoicum turgens 

      Hansen, Ida Kristine Østnes; Isaksson, Johan; Poth, Aaron G.; Østnes Hansen, Kine; Andersen, Aaron John Christian; Richard, Céline Sarah Marine; Blencke, Hans-Matti; Stensvåg, Klara; Craik, David J.; Haug, Tor (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-12)
      This study reports the isolation of two novel cysteine-rich antibacterial peptides, turgencin A and turgencin B, along with their oxidized derivatives, from the Arctic marine colonial ascidian <i>Synoicum turgens</i>. The peptides are post-translationally modified, containing six cysteines with an unusual disulfide connectivity of Cys<sup>1</sup>-Cys<sup>6</sup>, Cys<sup>2</sup>-Cys<sup>5</sup>, and ...

    • Isolation and Characterization of Antimicrobial Peptides with Unusual Disulfide Connectivity from the Colonial Ascidian Synoicum turgens 

      Hansen, Ida Kristine Østnes; Isaksson, Johan; Poth, Aaron G.; Østnes Hansen, Kine; Andersen, Aaron John Christian; Richard, Céline Sarah Marine; Blencke, Hans-Matti; Stensvåg, Klara; Craik, David J.; Haug, Tor (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-12)
      This study reports the isolation of two novel cysteine-rich antibacterial peptides, turgencin A and turgencin B, along with their oxidized derivatives, from the Arctic marine colonial ascidian <i>Synoicum turgens</i>. The peptides are post-translationally modified, containing six cysteines with an unusual disulfide connectivity of Cys<sup>1</i>-Cys<sup>6</sup>, Cys<sup>2</sup>-Cys<sup>5</sup>, and ...

    • Isolation and Synthesis of Pulmonarins A and B, Acetylcholinesterase Inhibitors from the Colonial Ascidian Synoicum pulmonaria 

      Tadesse, Margey; Svenson, Johan; Sepcič, Kristina; Trembleau, Laurent; Engqvist, Stig Olov Magnus; Andersen, Jeanette Hammer; Jaspars, Marcel; Stensvåg, Klara; Haug, Tor (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-02-14)
      Pulmonarins A and B are two new dibrominated marine acetylcholinesterase inhibitors that were isolated and characterized from the sub-Arctic ascidian <i>Synoicum pulmonaria</i> collected off the Norwegian coast. The structures of natural pulmonarins A and B were tentatively elucidated by spectroscopic methods and later verified by comparison with synthetically prepared material. Both pulmonarins A ...

    • Isolering av etylester og triacylglyserol ved hjelp av fast fase ekstraksjon 

      Guldberg, Mia Brattli (Master thesis; Mastergradsoppgave, 2018-05-15)
      I de siste par tiårene har det vært en kraftig økning i humant bruk av kosttilskudd som inneholder langkjedede omega-3 fettsyrer, det vil si eicosapentaensyre (EPA) og docosaheksaensyre (DHA). Årsaken er de antatte positive helseeffekter disse fettsyrene har. I dag er det vanligst at slike kosttilskudd tas i form av kapsler, blant annet fordi mange mennesker synes marine oljer er ubehagelig å drikke ...

    • Isolering og karakterisering av Vibrio - bakterier fra laks (Salmo salar L.) med "Hitrasjuke" 

      Holm, Kåre Olav (Master thesis; Mastergradsoppgave, 1985-10-11)
      Hensikten med oppgaven var å isolere og klassifisere bakterier som eventuelt forekommer i laks med ”Hitrasjuke” og som kan settes i sammenheng med sjukdommen. Tjue isolater fra sjuk laks fra forskjellige geografiske lokaliteter langs norskekysten ble analysert og gitt en inngående fenotypisk beskrivelse gjennom mikrobiologiske, biokjemiske og immunologiske (serologiske) karakteristika. Det ble også ...

    • The issues of price formation on the processing stage of herring production in Russia 

      Karamouchko, Irina (Master thesis; Mastergradsoppgave, 2002-06-21)