Browsing NTNU Open by Author "Olsen, Yngvar"
Now showing items 21-40 of 78
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Development of lipid metabolism in early life stages of Atlantic salmon (Salmo salar)
Jin, Yang (Doctoral theses at NTNU;2019:47, Doctoral thesis, 2019)Development of lipid metabolism in early life stages of Atlantic salmon (Salmo salar) Larval and juvenile stages are critical periods for Atlantic salmon (Salmo salar), which can have a major impact on growth and ... -
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 ... -
Discharge of nutrient wastes from salmon farms: environmental effects, and potential for integrated multi-trophic aquaculture
Wang, Xinxin; Olsen, Lasse Mork; Reitan, Kjell Inge; Olsen, Yngvar (Journal article; Peer reviewed, 2012)We quantified release rates of carbon (C), nitrogen (N) and phosphorus (P) waste from Norwegian salmon farms in 2009 in order to evaluate the theoretical environmental influence on surrounding waters and the potential for ... -
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 Nutrient Availability and Light Conditions on the Growth and Intracellular Nitrogen Components of Land-Based Cultivated Saccharina latissima (Phaeophyta)
Jevne, Lone Sunniva; Forbord, Silje; Olsen, Yngvar (Peer reviewed; Journal article, 2020)With the increasing interest and activities regarding seaweed cultivation in Europe, it is becoming crucial to utilize the opportunities that lies within environmental resources, such as light and nutrients, to produce ... -
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. ... -
Effects of copepod density and water exchange on the egg production of Acartia tonsa Dana (Copepoda: Calanoida) feeding on Rhodomonas baltica
Salveson, Erik (Master thesis, 2013)In this study, the objective was to investigate the effect of different copepod densities and the water exchange rate day-1 on the egg production of Acartia tonsa feeding on Rhodomonas baltica. It was a main task to find ... -
Effekten av næringssaltutslepp frå oppdrettsanlegg på fytoplanktonsamfunn i Sør-Trøndelag
Skrove, Tale (Master thesis, 2014)SamandragDet er knytt ei rekkje problem til oppdrettsnæringa, mellom dei ei otte i høve til eutrofiering i pelagisk sone som ei følgje av næringssaltutslepp frå oppdrettsanlegg. Langs Norskekysten manglar ein gode ... -
Effekten av to synlig lys modaliteter og røntgen på klekkesuksessen hos Acartia tonsa-egg
Vorren, Sigbjørn Hjetland (Master thesis, 2014)For å få en stabil og forutsigbar klekking av Acartia tonsa er kunnskapom miljøparametere som påvirker klekkingen essensielt. Målet med denneoppgaven var å undersøke hvilken virkning ulike kvaliteter av synlig lysinkludert ... -
Egg string hatching success, development to copepodids and tolerance to low salinities in salmon lice (Lepeophtheirus salmonis) as a consequence of freshwater delousing
Hansen, Sondre Strand (Master thesis, 2022)Lakselus (Lepeophtheirus salmonis) er en hovedgrunnene til at veksten har stangnert i havbruksnæringen. Flere nye metoder for å kontrollere luseinfestasjon har blitt utviklet, og en av disse er ferskvannsbehandlinger ved ... -
Experimental investigation of nutrient competition between starved Saccharina latissima and phytoplankon.
Rønningen, Nora (Master thesis, 2023)Kultivering av makroalger er en bærekraftig industri med stort potensiale for å produsere mat og andre produkter. Makroalger kan derfor være en viktig kilde til å øke matsikkerheten til den økende globale befolkningen. ... -
How can mariculture better help feed humanity?
Olsen, Yngvar (Peer reviewed; Journal article, 2015)The primary production of the marine and the terrestrial domains are similar, ~49 and 56 Gt C year−1, respectively (Field et al., 1998), and the marine primary production must likely be more readily available for grazing ... -
IIb-RAD-sequencing coupled with random forest classification indicates regional population structuring and sex-specific differentiation in salmon lice (Lepeophtheirus salmonis)
Guragain, Prashanna; Båtnes, Anna Solvang; Zobolas, John; Olsen, Yngvar; Bones, Atle M.; Winge, Per (Peer reviewed; Journal article, 2022)The aquaculture industry has been dealing with salmon lice problems forming serious threats to salmonid farming. Several treatment approaches have been used to control the parasite. Treatment effectiveness must be optimized, ... -
Incorporation of feed and fecal waste from salmon aquaculture in great scallops (Pecten Maximus) co-fed by different algal concentrations
Bergvik, Maria; Stensås, Lene; Handå, Aleksander; Reitan, Kjell Inge; Strand, Øivind; Olsen, Yngvar (Journal article; Peer reviewed, 2019)Juvenile scallops of Pecten maxiumus were studied to see the capability to clear out and incorporate salmon feed and feces (30 µg L-1). Algae were also given, in a low and high concentration in addition to feed and faeces, ... -
Influence of food availability and nutritional state of macroalgae on development of fouling bryozoans on cultivated Saccharina latissima
Njåstad, Elin Bjørndal (Master thesis, 2018)Fouling of bryozoans is a major challenge in the Norwegian macroalgae industry. Bryozoans are one of the prominent epiphytes colonizing macroalgae, causing mechanical damage, competing for nutrient, shading and decreasing ... -
Initial short-term nitrate uptake in juvenile, cultivated Saccharina latissima (Phaeophyceae) of variable nutritional state
Forbord, Silje; Etter, Siv Anina; Broch, Ole Jacob; Dahlen, Vegard Rønning; Olsen, Yngvar (Journal article; Peer reviewed, 2021)To reach the goal of large-scale seaweed cultivation in Norway, new knowledge concerning commercially important species like the kelp Saccharina latissima is essential. This includes fundamental understanding of physiological ... -
K-selection as microbial community management strategy: A method for improved viability of larvae in aquaculture
Vadstein, Olav; Attramadal, Kari; Bakke, Ingrid; Olsen, Yngvar (Journal article; Peer reviewed, 2018)Aquaculture has the potential to become a major food supplier in a world with an increasing human population, and increased consumption of fish will likely have positive health implications. For marine aquaculture, the ... -
Kjemisk desinfisering av egg til copepoden Acartia tonsa
Singsaas, Katrine (Master thesis, 2014)Copepoder har god næringsverdi og er en viktig fôrkilde for marine fiskelarver i havet. Vedoppdrett av mange marine fiskearter er copepoder et godt alternativ til de tradisjonellefôrorganismene; Artemia og rotatorier. ... -
Latitudinal, seasonal and depth-dependent variation in growth, chemical composition and biofouling of cultivated Saccharina latissima (Phaeophyceae) along the Norwegian coast
Forbord, Silje; Matsson, Sanna; Brodahl, Guri Ellila; Bluhm, Bodil; Broch, Ole Jacob; Handå, Aleksander; Metaxas, Anna; Skjermo, Jorunn; Steinhovden, Kristine; Olsen, Yngvar (Journal article; Peer reviewed, 2020)The Norwegian coastline covers more than 10° in latitude and provides a range in abiotic and biotic conditions for seaweed farming. In this study, we compared the effects of cultivation depth and season on the increase in ...