Blar i NTNU Open på forfatter "Vadstein, Olav"
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Correlations of age and growth rate with microbiota composition in Atlantic cod (Gadus morhua) larvae
Trinh, Ly T. T.; Bakke, Ingrid; Vadstein, Olav (Journal article; Peer reviewed, 2017)Little information is available on the link between host development (growth rate and ontogeny) and the composition of the microbiota in fish larvae. This study was carried out to examine potential correlations of microbiota ... -
Development of Molecular Tools in the Diatom Coscinodiscus wailesii
Palandre, Hugues (Master thesis, 2021)Þróun Sameindalíffræði tooes í kísilþörungar Coscinodiscus Wailesii kísilþörungars eru þekktir fyrir fjölmörg form og eyðublöð sem gefin eru af frumuveggnum sínum úr kísil sem heitir frustule. Þeir eru einnig mjög mismunandi ... -
Dietary fatty acid source has little effect on the development of the immune system in the pyloric caeca of Atlantic salmon fry
Jalili, Mahsa; Jin, Yang; Bones, Atle M.; Olsen, Yngvar; Vadstein, Olav; Østensen, Mari-Ann; Buonocore, Francesco; Gerdol, Marco; Pallavicini, Alberto; Scapigliati, Giuseppe (Journal article; Peer reviewed, 2019)The quality and relative amounts of dietary lipids may affect the health and growth of cultured Atlantic salmon. So far, little is known about their effects on the performance of the fish immune system during early life ... -
Dietary Lipid Effects on Gut Microbiota of First Feeding Atlantic Salmon (Salmo salar L.)
Eleni, Nikouli; Konstantinos Ar., Kormas; Yang, Jin; Olsen, Yngvar; Bakke, Ingrid; Vadstein, Olav (Peer reviewed; Journal article, 2021)Decline in fish oil and fish meal availability has forced the aquaculture sector to investigate alternative and sustainable aquafeed ingredients. Despite that several studies have evaluated the effect of fish oil replacement ... -
Draft genome sequence of the docosahexaenoic acid producing thraustochytrid Aurantiochytrium sp. T66
Liu, Bin; Ertesvåg, Helga; Aasen, Inga Marie; Vadstein, Olav; Brautaset, Trygve; Heggeset, Tonje Marita Bjerkan (Journal article; Peer reviewed, 2016)Thraustochytrids are unicellular, marine protists, and there is a growing industrial interest in these organisms, particularly because some species, including strains belonging to the genus Aurantiochytrium, accumulate ... -
Dynamic responses to silicon in Thalassiosira pseudonana - Identification, characterisation and classification of signature genes and their corresponding protein motifs
Brembu, Tore; Chauton, Matilde Skogen; Winge, Per; Bones, Atle M.; Vadstein, Olav (Journal article; Peer reviewed, 2017)The diatom cell wall, or frustule, is a highly complex, three-dimensional structure consisting of nanopatterned silica as well as proteins and other organic components. While some key components have been identified, ... -
Effect of different live feed organisms on microbiota, growth and survival during start-feeding of ballan wrasse (Labrus bergylta)
Rosvoll, Ann Isabel C. (Master thesis, 2022)Rensefisk har en sentral rolle i lakseindustrien som en biologisk behandling mot lakselus (Lepeophtheirus salmonis). Parasittene har en negativ påvirkning på velferden til fisken, i tillegg til lakseprodusentenes økonomiske ... -
The effect of disturbances on bacterial community characteristics and assembly patterns: insights from microcosms and land-based aquaculture systems
Gundersen, Madeleine Julia (Doctoral theses at NTNU;2023:403, Doctoral thesis, 2023)Bacterial communities play a vital role in human health, ecosystem stability and various industrial applications, including land-based aquaculture. These communities change over time through predictable deterministic ... -
Effect of Gastrointestinal Microbiota on Growth in Mangrove Killifish (Kryptolebias marmoratus) and Atlantic Cod (Gadus morhua)
Sjulstad, Eli Bjørnø (Master thesis, 2011)All animals live in symbiosis with complex microbial communities. The gastrointestinal system in vertebrates is a natural environment for microbes, and this leads to a complex and numerous microbiota. The gastrointestinal ... -
Effect of gastrointestinal microflora on the growth rate of Atlantic Cod (Gadus Morhua) larvae
Trinh, Thi Truc Ly (Master thesis, 2014)The gastrointestinal tract of fish larvae is inhabited by complex and diverse groups of microbes. Both internal and external factors affect the composition of the microbiota. Until now little information is available on ... -
Effect of hydroxamate and catecholate siderophores on iron availability in the diatom Skeletonema costatum: Implications of siderophore degradation by associated bacteria
Sanchez, Nicolas; Peterson, Claire Katja; Villa Gonzalez, Susana; Vadstein, Olav; Olsen, Yngvar; Ardelan, Murat Van (Journal article; Peer reviewed, 2019)The bioavailability of iron (Fe) across marine ecosystems, mainly determined by Fe speciation and species-specific requirements of phytoplankton, remains largely unresolved. Siderophores are relevant within the pool of ... -
The effect of periodic disturbances and carrying capacity on the significance of selection and drift in complex bacterial communities
Gundersen, Madeleine S.; Vadstein, Olav; Bakke, Ingrid; Andersen, Tom; Morelan, Ian (Peer reviewed; Journal article, 2021)Understanding how periodical disturbances affect the community assembly processes is vital for predicting temporal dynamics in microbial communities. However, the effect of dilutions as disturbances are poorly understood. ... -
Effect of Siderophore on Iron Availability in a Diatom and a Dinoflagellate Species: Contrasting Response in Associated Bacteria
Sanchez, Nicolas; Brown, Eunice Nana Adjoa; Olsen, Yngvar; Vadstein, Olav; Iriarte, Jose Luis; Gonzalez, Humberto E.; Ardelan, Murat Van (Journal article; Peer reviewed, 2018)Organic ligands play a key role controlling trace metal bioavailability in the world's oceans, yet the species-specific requirements determining whether certain iron forms can be metabolized largely remain unclear. ... -
Effect of water treatment systems on gut microbial community in reared larvae of Atlantic Cod (Gadus morhua)
Truong, Thi My Hanh (Master thesis, 2012)The experiment was carried out from 23rd Junuary to 24th March 2011 at Sealab. Atlantic cod larvae were reared with water from three different systems: flow-though, maturated water and recirculation water. The water, larvae ... -
Effects of a Hyperthermophilic Pre- Treatment applying Thermotoga Lepl 10 in Biological Waste for Anaerobic Digestion
Holen, Vilde (Master thesis, 2019)Anaerob nedbryting av biologisk avfall har blitt en utbredt teknologi for produksjon av den fornybare energikilden biogass. Forbehandling av avfallet er vanlig for å utføre lovpålagt hygienisering, og å hydrolysere for å ... -
Effects of reduced organic matter loading through membrane filtration on the microbial community dynamics in recirculating aquaculture systems (RAS) with Atlantic salmon parr (Salmo salar)
Fossmark, Ragnhild Olsen; Vadstein, Olav; Rosten, Trond Waldemar; Bakke, Ingrid; Koseto, Deni; Bugten, Anette Voll; Helberg, Gaute Alexander Nedberg; Nesje, Jenny; Jørgensen, Niels O.G.; Raspati, Gema Sakti; Azrague, Kamal; Østerhus, Stein Wold; Attramadal, Kari (Peer reviewed; Journal article, 2020)A key challenge in recirculating aquaculture systems (RAS) is the accumulation of particulate organic matter, especially the fine and colloidal fraction due to low removal efficiency of today's technology. The supply of ... -
Effects of storage temperature on bacterial growth rates and community structure in fresh retail sushi
Hoel, Sunniva; Jakobsen, Anita Nordeng; Vadstein, Olav (Journal article, 2017)Aims This study was conducted to assess the effects of different storage temperatures (4–20°C), on bacterial concentrations, growth rates and community structure in fresh retail sushi, a popular retail product with a ... -
Evaluation of Optimal Light Quality for Growing Rhodomonas baltica
Paulsen, Tor-Erik Holt (Master thesis, 2021)Fototrof dyrking av mikroalger ved hjelp av kunstig belysning er en energikrevende prosess. For å forbredre prosessens økonomiske bærekraft bør den optimale lyskvaliteten benyttes. Med mål om å finne den kombinansjonen av ... -
Evaluation of Two Culture-Independent Methods for Quantification of the Fraction of K-and r-Strategists within Water Microbial Communities
Brandsegg, Hege (Master thesis, 2015)The r/K concept is a theoretical concept that can serve as a tool in evaluating the risk of invasion by pathogenic bacterial species in rearing of marine fish larvae. In rearing of marine fish larvae, a dominance of ... -
Exploring bacterial community composition and immune gene expression of European eel larvae (Anguilla anguilla) in relation to first-feeding diets
Bandara, Kasun Anuruddha; Benini, Elisa; Politis, Sebastian N.; Conceição, Luis E.C.; Santos, André; Sørensen, Sune Riis; Tomkiewicz, Jonna; Vadstein, Olav (Peer reviewed; Journal article, 2023)European eel (Anguilla anguilla) is a commercially important species for fisheries and aquaculture in Europe and the attempt to close the lifecycle in captivity is still at pioneering stage. The first feeding stage of this ...