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norskNorges fiskerihøgskole: Recent submissions
Now showing items 1081-1100 of 1642
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What is the true influence of the red tide on the production, price and marketing of the Galician mussel?
(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
(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
(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
(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
(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.)
(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
(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)
(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
(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
(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)
(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 ... -
Introduction to the themed issue - Poststructural approaches to fisheries
(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 ... -
Two Isomeric C16 Oxo-Fatty Acids from the Diatom Chaetoceros karianus Show Dual Agonist Activity towards Human Peroxisome Proliferator-Activated Receptors (PPARs) α/γ
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-05-25)The peroxisome proliferator-activated receptors (PPARs) function as ligand-activated transcription factors that convert signals in the form of lipids to physiological responses through the activation of metabolic target genes. Due to their key roles in lipid and carbohydrate metabolism, the PPARs are important drug targets. However, for several of the PPAR drugs currently in use, adverse side effects ... -
Climate change, fisheries management and fishing aptitude affecting spatial and temporal distributions of the Barents Sea cod fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-26)Climate change is expected to influence spatial and temporal distributions of fish stocks. The aim of this paper is to compare climate change impact on a fishery with other factors impacting the performance of fishing fleets. The fishery in question is the Northeast Arctic cod fishery, a well-documented fishery where data on spatial and temporal distributions are available. A cellular automata ... -
Effect of lifting the sweeps on bottom trawling catch efficiency on the Northeast arctic cod trawl fishery
(Research report; Forskningsrapport, 2014)Fuel consumption and environmental concerns have led bottom trawlers fishing for cod (Gadus morhua) in the Barents Sea to use semi-pelagic doors. However, this change may affect fish herding and consequently the catch efficiency of the gear. In this study we compared the catch efficiency of two different setups where the sweep length with bottom contact was different. This setup also enabled us to ... -
Hvordan planlegges kystsonen? Kartlegging av gjeldende planpraksis etter plan- og bygningsloven i sjøområdene
(Research report; Forskningsrapport, 2017-06)Planlegging i kystsonen har de senere år blitt bedre, og det gjøres mye godt planarbeid ute i kommunene. Flere og flere kommuner har vedtatte planer som dekker sjøarealet, antall interessenter som involveres øker, og omfanget og kvaliteten av datagrunnlaget blir stadig bedre. Flere kommuner tar også initiativ til interkommunale samarbeid hvor større sjøarealer planlegges på tvers av kommunegrensene. ... -
Use of semi-pelagic trawling for reducing bycatch in shrimp trawls. Trials onboard R/V Johan Ruud 02-06 February 2015
(Research report; Forskningsrapport, 2015)The present study evaluates whether lifting the trawl doors and sweeps from the seabed can reduce bycatch in shrimp trawl fisheries. We carried out a catch comparison and catch ratio analysis between two gear setups, one with the trawl doors and sweeps at the seabed (the traditional way) and the other with the doors and sweeps lifted. The study was carried out on American plaice. The results ... -
Permanent skjørt for redusering av luspåslag på laks
(Research report; Forskningsrapport, 2015-03-06)Hovedmålet med prosjektet er å dokumentere effekten av Permaskjørt i forhold til å redusere luspåslag, i tillegg til å dokumentere hvordan innretningen påvirker miljøet i merden, fiskens biologiske forhold og merdens hovedkomponenter i forhold til en merd uten Permaskj¢rt. <br> I prosjektet har det blitt gjennomført ulike forskningsaktiviteter, som modellforsøk, fullskalaforsøk, numeriske ... -
Second Polar Prediction Project (PPP) Societal and Economic Research and Applications (SERA) Meeting focused on end user use of weather and climate information
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-01-23)A primary goal of the World Meteorological Organization’s Polar Prediction Project (PPP) is to advance numerical modeling, data acquisition and assimilation, ensemble forecast methods, verification, and the development of prediction products for the polar regions. However, as aptly expressed more than two decades ago, “it should be understood that forecasts have no intrinsic value. They acquire value ... -
A Novel brominated Alkaloid Securidine A, Isolated from the Marine Bryozoan Securiflustra securifrons
(Conference object; Konferansebidrag, 2017)A novel brominated alkaloid, Securidine A, was isolated from the cold water marine bryozoan Securiflustra securifrons. Securidine A was isolated using semi-preparative HPLC, and the structure was elucidated by spectroscopic methods. The isolated Securidine A was tested for cytotoxic, antibacterial, and anti-diabetic activities as well as for its potential for inhibition of biofilm formation. No ...
