Browsing Master theses by Title
Now showing items 103-122 of 270
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Genetisk analyse av Vibrio anguillarum, Vibrio ordalii og Vibrio ordalii-lignende isolater isolert fra syk rognkjeks
(Master thesis, 2019-06-22)Vibrio anguillarum og en Vibrio ordalii-lignende bakterie har de siste årene vært et økende problem hos en rekke nyere marine arter det drives oppdrett av i Norge, spesielt rognkjeks. Lite studier er gjort av populasjonsgenetikken ... -
Growth performance and welfare of post-smolt (Salmo salar L.) reared in semi closed containment systems (S-CCS) – a comparative study
(Master thesis, 2020-06-23)The salmon industry faces challenges related to sea lice infestations, escapees, diseases and environmental impact. Semi closed containment systems (S-CCS) have been proposed to abate these challenges. In the S-CCS, cultured ... -
H2O2 effects on the potential macroalgal culture species Palmaria palmata (Linnaeus) Weber & Mohr and Ulva lactuca (Linnaeus)
(Master thesis, 2019-06-26)Hydrogen peroxide (H2O2) has been the most used remedy against salmon sea lice (Lepeophtheirus salmonis) in Norway since 2013. This remedy has been considered environmentally friendly, because it breaks down to water and ... -
Happy hatchday! How does timing of hatching affect the survival of larval Gadus morhua in a changing environment?
(Master thesis, 2019-06-22)The classical match-mismatch hypothesis proposes that the timing between larval first feeding and food availability is an important driver of year-class strength. With climate change and the warming of the oceans, it is ... -
Histological investigation of gill health responses to recirculating aquaculture system (RAS) water quality in apparently healthy Atlantic salmon (Salmo salar)
(Master thesis, 2020-08-04)Recirculating aquaculture system (RAS) technology has become more widespread in Atlantic salmon farming, and the need for knowledge about operating such a system has been highlighted in recent years. Gill pathology has ... -
How will thawing permafrost affect the microbial abundance and diversity in the Arctic?
(Master thesis, 2020-07-09)Permafrost, permanently frozen soil, constitutes a major portion of the Earth’s terrestrial cryosphere and represents a unique niche for cold-adapted microorganisms. As the global temperature increases, it is still unknown ... -
Identifisering av potensielle virulensfaktorer hos Pasteurella atlantica gv. salmonicida
(Master thesis, 2024-06-03)Pasteurellose hos atlantisk laks (Salmo salar) forårsaket av P. atlantica genomvar salmonicida har siden 2018 blitt en betydelig trussel mot fiskevelferden og den bærekraftige produksjonen i norsk akvakultur. Det er derfor ... -
Immune responses and efficacy mediated by vaccination with a live attenuated vaccine against Piscirickettsia salmonis in Atlantic salmon (Salmo salar)
(Master thesis, 2024-06-03)Salmonid Rickettsial Septicaemia (SRS), caused by Piscirickettsia salmonis, has plagued Chilean salmonid aquaculture since 1989. The bacterium evades immune responses by hiding in antigen-presenting cells, rendering ... -
Immunologiske responsar i huda hos sjøaure (Salmo trutta) ved infeksjon av lakselus (Lepeophtheirus salmonis) i preadulte stadiet
(Master thesis, 2022-06-01)Sjøaure er den anadrome delen av bestanden til brunaure (Salmo trutta). Arten gyter i elvar og bekkar før den smoltifiserer og vandrar ut i kystvatn for å finne større tilgang til føde og dermed vokse seg større. I kystvatn ... -
Immunrespons hos atlantisk laks (Salmo salar) ved infestasjon av lakselus (Lepeophtheirus salmonis): Endringer i genuttrykk og histologiske forandringer i hud
(Master thesis, 2021-06-01)Sammendrag Lakselus blir ansett som den største utfordringen knyttet til oppdrett i dag. Disse utfordningene kommer i form av redusert fiskehelse, økte produksjonskostnader samt tiltak og lovverk som begrenser vekst for ... -
Impact of cysteine 106 oxidation on function and localisation of the Parkinson’s disease-related protein DJ-1
(Master thesis, 2019-06-22) -
Improved stock estimation for Iceland scallops (Chlamys islandica) in the Svalbard area
(Master thesis, 2023-06-03)Iceland scallops (Chlamys islandica) were commercially harvested in the Svalbard fishery protection zone (FPZ) from 1986 to 1992, when the fishery ended due to overfishing. After approximately 30 years of prohibition, a ... -
Infection dynamics of marine Eubothrium sp. (Cestoda) in farmed Atlantic salmon
(Master thesis, 2019-06-21)Infections with marine tapeworms have been reported as an increasing problem in aquaculture of Atlantic salmon (Salmo salar L.) in Norway over the last few years. These are caused by the cestode Eubothrium sp. Little is ... -
Influence of temperature and feeding on early sexual maturation commitment in male Atlantic salmon (Salmo salar, L.) during the freshwater stage
(Master thesis, 2021-01-20)The intensification of Atlantic salmon (Salmo salar) post-smolt production to enhance growth performance has promoted a rise in precocious male maturation rates. Unlike traditional parr maturation, which seems to be highly ... -
Integrated taxonomic revision of Afrotropical Xyleborinus reveals an extraordinary recent radiation on Madagascar
(Master thesis, 2020-06-26)Collection efforts on Madagascar have previously revealed a high species diversity in the Scolytinae genus Xyleborinus Reitter, 1913 compared with the African mainland. This study has produced a well supported phylogeny ... -
Interaksjoner mellom marine næringsstoffer og dioksiner hos mus med human AhR
(Master thesis, 2021-11-22)Dioksiner og dioksinlignende PCB er en gruppe kjemiske forbindelser dannet via industrielle prosesser, som grunnet høy persistens vil akkumulere i fettvev hos mennesker og dyr. Fet fisk regnes som den største kilden til ... -
Interpreting the polychromatic variation of the European nudibranch Polycera quadrilineata (O. F. Müller, 1776), with the description of a new species
(Master thesis, 2019-11)The polychromatic variability exhibited by the dorid nudibranch species Polycera quadrilineata (O. F. Müller, 1776) (Family Polyceridae) has long fascinated marine scientists. The species was originally described from the ... -
Investigating Bromate Formation in Ozonated Saltwater RAS, used for rearing of Atlantic salmon (Salmo salar) Post-smolt
(Master thesis, 2024-06-03)Denne studien utforsker effekten av ozonering i saltvanns resirkulerende akvakultursystem (RAS) for Atlantisk laks post-smolt (Salmo salar), med fokus på bromatdannelse. Norsk akvakultur står overfor et teknologisk skifte ...