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Now showing items 1494-1513 of 1576
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Tromsø kommune Eiendom : en lærende organisasjon?
(Master thesis; Mastergradsoppgave, 2007-11-15)Tema i oppgaven kan plasseres innenfor organisasjonsteorien, nærmere bestemt innenfor læring i organisasjoner og den lærende organisasjonen. Jeg skal se om mål TKE hadde før samlokaliseringen har blitt oppnådd innenfor disse områdene. Videre vil jeg se på om, eller i hvilken grad TKE er en lærende organisasjon. Foregår det noe som helst læring på organisasjonsnivået, eller skjer dette bare på ... -
Two countries sharing a renewable resource. The allocation of the renewable natural resources in the Norwegian-Russian fisheries management regime of the Barents Sea. A multidisciplinary study
(Master thesis; Mastergradsoppgave, 2002-05-28) -
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 ... -
Two Novel Lyso-Ornithine Lipids Isolated from an Arctic Marine Lacinutrix sp. Bacterium
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-31)The Lacinutrix genus was discovered in 2005 and includes 12 Gram-negative bacterial species. To the best of our knowledge, the secondary metabolite production potential of this genus has not been explored before, and examination of Lacinutrix species may reveal novel chemistry. As part of a screening project of Arctic marine bacteria, the Lacinutrix sp. strain M09B143 was cultivated, extracted, ... -
The Two Sides of the Mediterranean: Population Genomics of the Black Sea Urchin Arbacia lixula (Linnaeus, 1758) in a Warming Sea
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-10)Global environmental changes may have a profound impact on ecosystems. In this context, it is crucial to gather biological and ecological information of the main species in marine communities to predict and mitigate potential effects of shifts in their distribution, abundance, and interactions. Using genotyping by sequencing (GBS), we assessed the genetic structure of a keystone species in the ... -
Ufordøyelig binder i fôr til laks - evaluering av velferd og tilvekst
(Master thesis; Mastergradsoppgave, 2021-05-18)Med stadig økning i produksjon av oppdrettslaks og et relativt lavt antall tilgjengelig vannkilder til smoltproduksjon, ser man økt bygging av RAS-anlegg. Ved rensing av produksjonsvannet er første vannbehandlingstrinn mekanisk filtrering etterfulgt av biofiltrering, rensesystemets flaskehals. Biofilteret renser vannet for nitrogenholdige molekyler (TAN), som er giftig for laks, og er sensitivt for ... -
Ultrafiltration of Saithe (Pollachius virens) Protein Hydrolysates and Its Effect on Antioxidative Activity
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-30)The whitefish industry generates a huge amount of rest raw material, which is currently wasted or underutilized in the production of low-value products such as animal feed. While fish muscle is the primary product of use for human consumption, rest raw material has great potential as a source of protein and bioactive peptides for the production of food ingredients and nutraceuticals. Enzymatic ... -
Ultrasonic imaging as a means of monitoring gonadal development in lumpfish (Cyclopterus lumpus)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-21)The commercial farming of juvenile lumpfish requires monitoring of gonadal development to achieve synchronized production. Conventional methods such as gonadosomatic index (GSI), sex hormone analyses, gonadal histology, endoscopy, and gene expression analyses are costly, invasive, and often involve sacrificing the fish. We assessed the efficiency of ultrasound as a non-invasive method for monitoring ... -
Uncovering neutral and adaptive genomic differentiation among European perch with brackish water and freshwater origin in the western Baltic Sea region
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-13)Environmental variation across the range of wild species can lead to local adaptations. The Baltic Sea was formed when the Fenno-Scandian ice sheet retreated around 12 thousand years ago, creating a new brackish water habitat colonised by both marine and freshwater fish species. The European perch (Perca fluviatilis) is a predatory freshwater fish with a large geographical distribution across ... -
Under the canopy: Community-wide effects of invasive algae in Marine Protected Areas revealed by metabarcoding
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-12-21)We analysed with multigene (18S and COI) metabarcoding the effects of the proliferation of invasive seaweeds on rocky littoral communities in two Spanish Marine Protected Areas. The invasive algae studied were <i>Caulerpa cylindracea</i>, <i>Lophocladia lallemandii</i> and <i>Asparagopsis armata</i>. They are canopy-forming, landscape-dominant seaweeds, and we were interested in their effects on the ... -
Understanding and predicting size selection in diamond-mesh cod ends for Danish seining: a study based on sea trials and computer simulations
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-06-28)Danish seining is an important fishing method used to harvest demersal species. Knowledge about the size selectivity of different demersal species with this type of fishing gear is therefore of importance for managing the exploitation of marine resources. However, there are only limited data on size selection in cod ends in this fishery. Sea trials were therefore carried out to collect size selectivity ... -
Understanding and predicting the effect of entrance cone diameters on the catch efficiency of snow crabs (Chionoecetes opilio) in conical pots
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-11)Conical pots with a plastic entrance cone on the top are a type of fishing gear used to harvest snow crabs (Chionoecetes opilio) in Arctic regions. In this study, we assessed the effect of pot entrance diameter on the catch efficiency of snow crabs. We used catch data collected during sea trials of pots with different entrance cone diameters, and we conducted laboratory experiments where morphological ... -
Understanding the effect of design parameters on the filtration efficiency of trawls intended for commercial harvesting of zooplankton
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-01)A major challenge for the aquaculture sector is access to sustainable and cost-effective raw materials for feed. Copepods (Calanus spp.) have potential to meet this need for large volumes of marine raw materials to enable sustainable growth of aquaculture production worldwide. However, the lack of an energy- and catch-efficient trawl technology has limited the development of this fishery in the ... -
Understanding the impacts of climate change for fisheries and aquaculture: applying a poverty lens
(Chapter; Bokkapittel, 2018)Key messages <ul> <li>Climate change affects communities and livelihoods in fisheries and aquaculture, and efforts to adapt to and mitigate climate change must therefore be humancentred.</li> <li>Climate adaptation strategies must emphasize the need for poverty eradication and food security, in accordance with the Paris Agreement, the United Nations 2030 Agenda for Sustainable Development and ... -
Understanding the Size Selectivity of Redfish (Sebastes spp.) in North Atlantic Trawl Codends
(Journal article; Tidsskriftartikkel; Peer reviewed, 2012)The majority of trawl selectivity studies for the three redfish species of particular commercial importance in North Atlantic fisheries: Sebastes marinus, Sebastes mentella and Sebastes fasciatus, are based on data collected from diamond mesh codends with mesh sizes ranging from 88 mm to 147 mm. We demonstrate how results from these studies can be understood by morphological characteristics of ... -
Undersøkelse av mulige miljøforsterkede infeksjonsveier for lakselus, Lepeophtheirus salmonis, i merder beskyttet av 6 meters luseskjørt - basert på historiske produksjonsdata og modellerte miljøparameter
(Master thesis; Mastergradsoppgave, 2021-05-18)Utviklingen i den norske oppdrettsnæringen har vært forrykende, men de siste årene stagnert. Dette skyldes blant annet problemer med parasitten Lepeophtheirus salmonis, lakselus. En rekke forebyggende og bekjempende metoder er tatt i bruk av næringen og i denne studien undersøkes det forebyggende luseskjørtet. Skjørtet fungerer som en presenning og strekkes rundt de øverste delene av merdene, i denne ... -
An Update on the Content of Fatty Acids, Dioxins, PCBs and Heavy Metals in Farmed, Escaped and Wild Atlantic Salmon (Salmo salar L.) in Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-19)In this paper, we present updated data on proximate composition, amino acid, and fatty acid composition, as well as concentrations of dioxins, polychlorinated biphenyls (PCBs), and selected heavy metals, in fillets from farmed (n = 20), escaped (n = 17), and wild (n = 23) Atlantic salmon (<i>Salmo salar</i> L.). The concentrations of dioxins (0.53 ± 0.12 pg toxic equivalents (TEQ)/g), dioxin-like ... -
Uptake of Polystyrene Nanoplastic and its Impacts on the Proteome of Salmonid cells
(Master thesis; Mastergradsoppgave, 2023-06-27)Micro- and nanoplastic particles, produced from the breakdown of larger plastic debris, represent a whole new field of hazardous pollution with the potential to cause great damage on a range of marine species. This escalating concern of plastic pollution in marine environments and its consequential impacts on marine species, has emphasized the urgency for an in-depth understanding of the uptake and ... -
Urinsyre som adjuvans i fiskevaksiner
(Master thesis; Mastergradsoppgave, 2013-12-15)Vaksinering av fisk er ansett som den sikreste og mest kostnadseffektive strategien for å forebygge smittsomme sykdommer. Dagens vaksiner er dessverre lite effektive mot intracellulære patogener og kan være gjenstand for bivirkninger av ulik grad. Det er derfor nødvendig å utvikle nye og bedre vaksiner. En måte å gjøre dette på, er å prøve ut nye adjuvanser med potensial til å øke immunogeniteten ...
