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norskBlar i tittel Norges fiskerihøgskole
Viser treff 1019-1038 av 1576
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Mucosal and systemic physiological changes underscore the welfare risks of environmental hydrogen sulphide in post-smolt Atlantic salmon (Salmo salar)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-04)Atlantic salmon (Salmo salar) might encounter toxic hydrogen sulphide (H<sub>2</sub>S) gas during aquaculture production. Exposure to this gas can be acute or chronic, with heightened levels often linked to significant mortality rates. Despite its recognised toxicity, our understanding of the physiological implications of H<sub>2</sub>S on salmon remains limited. This report details the mucosal and ... -
Mucosal Environment Induces Phage Susceptibility in Streptococcus mutans
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-19)Pathogenic bacteria are attracted toward mucosa, as it is their way of entry into the body. However, we know surprisingly little about the phage-bacterium interactions in the mucosal environment. Here, we explored the effect of the mucosal environment on growth characteristics and phage-bacterium interactions in Streptococcus mutans, a causative agent of dental caries. We found that although mucin ... -
Mucosal immune responses of Atlantic salmon parr following a pathogen breach in a recirculating aquaculture system
(Master thesis; Mastergradsoppgave, 2022-05-16)With the increase in the use of recirculating aquaculture system (RAS) in the Norwegian Atlantic salmon (Salmo salar) aquaculture industry, the importance of understanding how pathogen enters and spreads in the system is crucial for its further development. Yersinia ruckeri is a pathogen known for infecting salmonid fish in freshwater stage and it has been shown that the RAS environment favors its ... -
Muligheter for felles system for kvalitetsvurdering av sjøfrossen sløyd- og hodekappet torsk.
(Master thesis; Mastergradsoppgave, 2021-11-16)Denne oppgaven undersøkte om det er mulig å lage et felles system for kvalitetsvurdering på sjøfrossen sløyd- og hodekappet torsk. Det er flere momenter som tilsier det eksisterer et behov for å lage et felles system for kvalitetsvurdering: • Litteraturen tilsier at det landes mye variert råstoffkvalitet. • Landinger av dårlig kvalitet påvirker verdiskapingsmuligheter negativt. • En nedgang ... -
Muligheter og barrierer for økt salg av ferske laksefileter til Kina
(Master thesis; Mastergradsoppgave, 2014-05-15)I denne masteroppgaven i fiskeri- og havbruksvitenskap har jeg undersøkt muligheten for en økning av norsk eksport av ferske filetprodukter av atlantisk laks (Salmo salar) til det kinesiske markedet med hovedfokus på storbyen Shanghai. Bakgrunnen er et ønske om å få belyst hvorfor det ikke eksporteres pre-rigor fileterte lakseprodukter til matvarekjeder i Kina på samme måte som til andre asiatiske ... -
A multi-region and multi-period harvest schedule of the trawl fleet
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-21)Under the individual vessel quota regulations, the expected economic return of a multi species fishery is influenced by an array of a multi-component choice such as targeted species, landings per haul, harvesting time and its location. The components of effort allocation decisions are further complicated by changes in the market conditions and the constant movements of fish between spawning and ... -
Multidisciplinary perspectives on living marine resources in the Arctic
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-20)Many areas in the Arctic are vulnerable to the impacts of climate change. We observe large-scale effects on physical, biological, economic and social parameters, including ice cover, species distributions, economic activity and regional governance frameworks. Arctic living marine resources are affected in various ways. A holistic understanding of these effects requires a multidisciplinary enterprise. ... -
MultiSEPT - Full scale tests of the semicircular spreading gear (SCSG)
(Research report; Forskningsrapport, 2013-06-24)This reportdescribes full scale tests at sea with the semi-circular spreading gear (SCSG). This activity is part of Work Package 3 (WP3: Development of new ground gear) of the MultiSEPT project. The spreading of the SCSG and rockhopper gear was measured by useof MARPORT distance sensors. Bottom contact was monitored by use of SCANMARtrawl sensors and by underwater cameras mounted in the headline ... -
Musculoskeletal symptoms among workers in the commercial fishing fleet of Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-06-25)<i>Background</i>: Fishers exposed to unfavourable environmental conditions may suffer negative health ef- fects. This study aimed to identify musculoskeletal symptoms in professional fishers in Norway using data from several sources; register data, telephone survey and questionnaire.<p> <p><i>Materials and methods</i>: Professional fishers (n = 25,971) registered in the period 2008-2013 were ... -
MyD88 interacts with interferon regulatory factor (IRF) 3 and IRF7 in Atlantic salmon (Salmo salar): transgenic SsMyD88 modulates the IRF-induced type I interferon response and accumulates in aggresomes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011-10-11)Background: MyD88 directly interacts and affects IRF activation in mammals, but no information has been available about lower vertebrates.<p> <p>Results: Transgenic MyD88 interacts with IRF3 and IRF7A/B and modulates the IRF-induced IFN response and accumulates in aggresomes in Atlantic salmon. <p>Conclusion: MyD88 is involved in the regulation of the IRF-induced IFN response in Atlantic ... -
Nanofiltration of intake water in RAS: Effect on fish performance, health and welfare
(Research report; Forskningsrapport, 2022)The experiment tested the effect of nanomembrane filtration in RAS on the salmon's physiology, welfare and growth. A specially designed membrane was used to remove sulphate from seawater and to adjust salinity from 32 to 12 ‰. A RAS where salinity was adjusted to 12 ‰ by mixing raw seawater and freshwater was used as control. The fish were kept in the two systems for 10 weeks before being ... -
Naphthoquinone pigments from the green sea urchin, Strongylocentrotus droebachiensis
(Master thesis; Mastergradsoppgave, 2021-02-08)Spinochromes are part of a subgroups of quinones called naphthoquinones. These molecules have a series of bioactivity making them a promising target for marine researchers all over the world. Sulphated spinochromes was recently identified, but their structure or bioactivity is yet to be elucidated. In this project, an attempt to extract these sulphated spinochromes from red spherule cells are made. ... -
Narrow lenses for capturing the complexity of fisheries: A topic analysis of fisheries science from 1990 to 2016
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04-20)Despite increased fisheries science output and publication outlets, the global crisis in fisheries management is as present as ever. Since a narrow research focus may be a contributing factor to this failure, this study uncovers topics in fisheries research and their trends over time. This interdisciplinary research evaluates whether science is diversifying fisheries research topics in an attempt ... -
The Nasal Geometry of the Reindeer Gives Energy-Efficient Respiration
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-07-14)Reindeer in the arctic region live under very harsh conditions and may face temperatures below 233 K. Therefore, efficient conservation of body heat and water is important for their survival. Alongside their insulating fur, the reindeer nasal mechanism for heat and mass exchange during respiration plays a fundamental role. We present a dynamic model to describe the heat and mass transport that takes ... -
Natural transformation in Streptococcus gordonii biofilm
(Master thesis; Mastergradsoppgave, 2011-06-01)Natural transformation is one of the three mechanisms of horizontal gene transfer by which bacteria are able to take up free DNA from the surrounding environment. In natural ecosystems, bacteria preferentially attach to surfaces, forming matrix-enclosed communities known as biofilm. Biofilm cells differ phenotypically and physiologically from their free-floating counterparts. Objective: To estimate ... -
"Når det blåser i fra ØST" - Om bruken av økosystemtjeneste-perspektivet i kystsoneplanleggingen
(Research report; Forskningsrapport, 2019)Denne rapporten er et resultat av prosjektet Coreplan, som har undersøkt om metoder og tilnærminger som finnes i litteraturen om økosystemtjenester kan bidra til å styrke kystsoneforvaltningen. I rapporten diskuterer vi utviklingstrekk i norsk kystsoneplanlegging og hvordan utviklingen i bruken av kysten kan stille nye krav til kystsoneplanleggingen. Vi forklarer bakgrunnen for begrepet økosystemtjenester, ... -
The need for sustainable development of the small-scale fisheries - A case study from the Northern Province, Sri Lanka.
(Master thesis; Mastergradsoppgave, 2015-11-13)The purpose of this master thesis is to explore the present situation of the coastal small-scale fishery in the Northern Province of Sri Lanka and to bring an overall picture of the coastal small-scale fishery. To attain this, a strength, weakness, opportunity and threat matrix was formulated. The study also point out the main bottlenecks of sustainable fishery development. Finally the study recommends ... -
Nefrokalsinose hos oppdrettslaks - mulige årsaker og virkninger
(Master thesis; Mastergradsoppgave, 2021-05-17)I denne oppgaven er det sett på betydningen av ulike faktorer i vannmiljøet som utløsende årsaker til nefrokalsinose hos norsk oppdrettslaks (Salmo salar). Nefrokalsinose er utfelling av kalkholdig materiale i nyret og en kjent lidelse hos flere fiskearter i oppdrett, inkludert regnbueørret (Oncorhynchus mykiss). Hos laks er nefrokalsinose et relativt nytt fenomen, som ser ut til å øke i omfang. ... -
The Neglected Marine Fungi, Sensu stricto, and Their Isolation for Natural Products’ Discovery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-10)Despite the rapid development of molecular techniques relevant for natural product research, culture isolates remain the primary source from which natural products chemists discover and obtain new molecules from microbial sources. Techniques for obtaining and identifying microbial isolates (such as filamentous fungi) are thus of crucial importance for a successful natural products’ discovery program. ... -
Nemo-effekten og koraller
(Journal article; Tidsskriftartikkel, 2014-05-07)Bryr den norske befolkningen seg om dyphavet og de organismer som lever der selv om vi ikke har noen direkte nytte av dem? Er vi villig til å ofre økonomisk aktivitet som fiskeri og oljevirksomhet for beskytte miljøet i dyphavet? Vår studie sier ja.
