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norskNorges fiskerihøgskole: Nye registreringer
Viser treff 1-20 av 1576
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Evaluation of ozone and peracetic acid use during a Yersinia ruckeri challenge in Atlantic salmon (Salmo salar) freshwater recirculating aquaculture systems
(Master thesis; Mastergradsoppgave, 2023-05-16)Yersinia ruckeri (Y. ruckeri) the causative agent of Enteric red-mouth disease (ERM), a serious septicemic bacterial disease of salmonid fish, poses a significant challenge in salmon production. With the emergence of recirculating aquaculture system (RAS) in Norway, new biological challenges in relation to infectious disease outbreaks have arisen. There is a gap in knowledge on how potential ... -
Systemic and mucosal stress responses of Atlantic salmon (Salmo salar) to peracetic acid
(Master thesis; Mastergradsoppgave, 2019-05-15)Infectious diseases are still a major problem in salmon aquaculture despite several attempts on developing prophylactic measures. Amoebic gill disease (AGD) is considered a growing threat in Norwegian salmon aquaculture. It has increased in prevalence and geographic distribution in the last years, resulting in considerable economic losses. Current treatments (i.e., freshwater and hydrogen peroxide ... -
Nonclassical MHC class I L-lineage genes in Atlantic Salmon (Salmo salar L.): An investigation into transcriptional induction and cell type-specific expression patterns of different L-lineage subgroups
(Master thesis; Mastergradsoppgave, 2023-05-15)The world's population is growing, and so is the world's food demand, underpinning the need for sustainable food production. Over the last few decades, Norwegian aquaculture production of Atlantic Salmon (Salmo Salar L.) and rainbow trout (Oncorhynchus mykiss) expanded rapidly. Unfortunately, today’s fish health situation is challenging due to virus infections, among other reasons. Today's virus ... -
Bruk av Lean som forbedringsverktøy i norsk fiskeindustri: En studie av Lerøy Seafood, avd. Melbu
(Master thesis; Mastergradsoppgave, 2021-05-15)Norsk fiskeindustri har tatt i bruk både ny teknologi og nye styringsverktøy for å øke effektiviteten, forbedre utnyttelsen av råstoffet og styrke fortjenesten. Ett av styringsverktøyene som har blitt introdusert i de seinere årene er Lean. Dette er et styringsverktøy som har sitt utspring i Toyota Motor Corporation og japansk kultur. Denne studien ser nærmere på hvordan Lean er satt sammen og ... -
Impact of temperature-dependent developmental plasticity on immune response and cardiac health to Yersinia ruckeri infection, in Atlantic salmon parr
(Master thesis; Mastergradsoppgave, 2023-05-15)Heart injuries and diseases are one of the largest challenges in Atlantic salmon aquaculture. Presently, salmon experience intensive farming conditions and feeding regimes, and different viral and bacterial pathogens flourish and create cardiac health risks. Many have suggested how early life history plays a greater role in performance than previously assumed. The RCN-NFR funded project COOLFISH ... -
Hvordan arbeide med å utvikle sikkerhetskultur i norsk havbruksnæring
(Master thesis; Mastergradsoppgave, 2023-05-15)Den norske oppdrettsnæringen er en teknologisk og kompleks industri, som fører til at de ansatte møter risiko for å skade seg eller omkomme på arbeid. De siste årene har det vært en økning i antall alvorlige arbeidsulykker i næringen. For å ivareta sikkerhetshensynet til mennesker, fisk, materiell og økonomi er det nødvendig at selskap og forvaltningsorgan setter ekstra fokus på helse-, miljø- og ... -
Immunstatus hos fertil og steril laks under sjøfasen - en komparativ oversikt
(Master thesis; Mastergradsoppgave, 2022-05-15)Rømning av oppdrettslaks medfører til uønsket genetisk innblanding i den ville laksebestanden, noe som resulterer i dårligere ytelse og overlevelse hos den ville laksen. I tillegg er kjønnsmodning av oppdrettslaksen et velferdsproblem, da dette medfører en rekke negative effekter for fisken, blant disse redusert vekst, immunrespons og hypo- osmoregulatoriske evner. En mulig løsning på disse problemene ... -
Impacts of climate-related temperature stress on Atlantic salmon (Salmo salar L.) gills
(Master thesis; Mastergradsoppgave, 2023-05-15)Constantly increasing water temperatures caused by climate change, can lead to major consequences for the welfare of farmed fish. The interactions between the expected changes and the fish physiology are still not understood, in specific how the changing environment may affect the fish's health, and how this may impact aquaculture production in general. The fish's gill health can be used as an ... -
The effect of climate related stressors on liver in Atlantic salmon (Salmo salar)
(Master thesis; Mastergradsoppgave, 2023-05-15)Climate change impacts the average temperature in the world’s oceans, as well as other environmental parameters, such as oxygen levels. These changes are threatening and challenging animals living there, including farmed species. In this trial Atlantic salmon (Salmo salar) were exposed to fluctuating temperature (12-17C) as a single stressor, and in combination with lowered level of dissolved oxygen ... -
Effekt av langvarig fryselagring på kokte cluster av kongekrabbe
(Master thesis; Mastergradsoppgave, 2019-05-15)Kongekrabbe har blitt fisket kommersielt i Norge siden 2002 og har blitt en viktig art for den norske sjømatindustrien, med stor økonomisk betydning i lokalsamfunn langs Finnmarkskysten. Med en eksport på 2000 tonn, til en verdi av 579 millioner kroner var kongekrabbe verdimessig den nest største arten i skalldyrkategorien i 2018. Mesteparten av kongekrabbe blir eksportert levende mens de resterende ... -
Effects of acute and chronic handling stress on antiviral responses in Atlantic salmon (Salmo salar) red blood cells and testing of stress target genes
(Master thesis; Mastergradsoppgave, 2023-05-13)The salmonids in today’s Norwegian aquaculture are exposed to many stressors, like suboptimal water quality, crowding and handling. This project focuses on red blood cell (RBCs) function in Atlantic salmon and how cellular responses are affected by stress. Since fish RBCs are nucleated and can change their gene expression, one of the main goals of this thesis is to better understand how the ... -
Bruk av Lean som forbedringsverktøy i norsk fiskeindustri: En studie av Lerøy Seafood, avd. Melbu
(Master thesis; Mastergradsoppgave, 2021-05-13)<p>Norsk fiskeindustri har tatt i bruk både ny teknologi og nye styringsverktøy for å øke effektiviteten, forbedre utnyttelsen av råstoffet og styrke fortjenesten. Ett av styringsverktøyene som har blitt introdusert i de seinere årene er Lean. Dette er et styringsverktøy som har sitt utspring i Toyota Motor Corporation og japansk kultur. <p>Denne studien ser nærmere på hvordan Lean er satt sammen ... -
Targeted gene editing of an infectious salmon anemia (ISA)-relevant gene in salmonids cells using the CRISPR/Cas9 Ribonucleoprotein complex
(Master thesis; Mastergradsoppgave, 2022-05-10)Background: The gene editing tool, CRISPR/Cas9, can potentially be applied in aquaculture to combat some of the problems of the farmed salmon industry including infectious diseases. The RNP (ribonucleoprotein)-based CRISPR/Cas9 strategy has recently been shown to be efficient in gene editing in diverse cell lines and organisms. Application of RNP strategy in salmon cell biology is still at its ... -
Permagov D3.2 Report on the Development of Diagnostic Tool: An overview of PERMAGOV’s tool co-development process
(Research report; Forskningsrapport, 2024)Institutional barriers are critical obstacles to policy implementation. Such barriers hamper the performance of marine policies and may also limit the potential for adapting governance arrangements in order to improve policy performance. Instigating transformation within longstanding governance arrangements is very challenging and is often hampered by institutional barriers such as path dependency, ... -
Effect of Calanus finmarchicus Hydrolysate Inclusion on Diet Attractiveness for Whiteleg Shrimp (Litopenaeus vannamei)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-13)Shrimp feed formulations have moved towards less fish meal and more of the readily available and cheaper plant proteins. To counteract the lower attractiveness and palatability of plant proteins, feeds are supplemented with ingredients known to have chemoattractive properties that will increase feed intake. This study investigated the putative chemoattractive effect of Calanus finmarchicus hydrolysate, ... -
Mitogenomic evidence of population differentiation of thorny skate, Amblyraja radiata, in the North Atlantic
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-25)Management of thorny skate (Amblyraja radiata) in the Northwest Atlantic has posed a conservation dilemma for several decades due to the species' lack of response to strong conservation efforts in the US Gulf of Maine and the Canadian Scotian Shelf, confusion over the relationship between two reproductive size morphs of differing life histories that are sympatric in the Northwest Atlantic, and ... -
Retrieval operations of derelict fishing gears give insight on the impact on marine life
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-16)Abandoned, lost and discarded fishing gear (ALDFG), significantly impacts marine ecosystems and biodiversity by incidental capture known as ghost fishing. Such impacts were quantified during the Norwegian Directorate of Fisheries' annual ALDFG cleanup operation in September 2023 by examining the characteristics of retrieved ALDFG and recording the taxonomically sorted catch abundance and biomass. A ... -
Global consortium for the classification of fungi and fungal-like taxa
(Journal article; Tidsskriftartikkel, 2023-12-12)The Global Consortium for the Classification of Fungi and fungus-like taxa is an international initiative of more than 550 mycologists to develop an electronic structure for the classification of these organisms. The members of the Consortium originate from 55 countries/regions worldwide, from a wide range of disciplines, and include senior, mid-career and early-career mycologists and plant pathologists. ... -
Fasting and its implications for fish welfare in Atlantic salmon aquaculture
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-20)Periods of fasting occur for a multitude of reasons in Atlantic salmon aquaculture. Feed withdrawal is widely used prior to transport, parasite treatments, preslaughter and for depuration purposes in recirculating aquaculture systems. Voluntary fasting is a coping response when fish have poor health or are exposed to poor farm environments. Owing to increased attention to animal welfare in aquaculture, ... -
Exploring the gap between top-down sustainability objectives and perceived local sustainability challenges – the case of Senja Municipality
(Master thesis; Mastergradsoppgave, 2023-08-14)Achieving social, environmental, and economic sustainability has become the aim of nations and organizations across the globe. One of the attempts to operationalize sustainability is through the integration of the sustainable development goals in coastal governance. However, the perceived characteristics of challenges for sustainability, and thus also solutions to them, may differ depending on the ...
