Blar i NTNU Open på forfatter "Fossmark, Ragnhild Olsen"
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A comparison of two seawater adaptation strategies for Atlantic salmon post-smolt (Salmo salar) grown in recirculating aquaculture systems (RAS): Nitrification, water and gut microbiota, and performance of fish
Fossmark, Ragnhild Olsen; Attramadal, Kari; Kristian, Nordøy; Østerhus, Stein Wold; Vadstein, Olav (Peer reviewed; Journal article, 2021)The land-based production phase in Norwegian Atlantic salmon farming has the past years been extended to include post-smolt for an increasing number of farmers. Post-smolt production can involve introduction of brackish/seawater ... -
The Effect of Membrane Filtration on the Microbial Community Dynamics in RAS for Post-Smolt Production
Fossmark, Ragnhild Olsen (Master thesis, 2016)An increased interest for recirculating aquaculture systems (RAS) the past years have led to more research on water treatment processes and how they affect water quality. Most studies have been focusing on the units governing ... -
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 ... -
Microbial challenges in recirculating aquaculture systems (RAS) for Atlantic salmon (Salmo salar) smolt and post-smolt
Fossmark, Ragnhild Olsen (Doctoral thesis, 2021)Aquaculture is one of the fastest growing food producing sectors today. Norway is the world’s largest producer of farmed Atlantic salmon (Salmo salar), and the aquaculture industry is an important contributor to value ... -
Oppstart av ferskvanns- og brakkvanns-biofilmreaktorer i RAS: Nitrifikasjonsaktivitet og mikrobiell samfunnstruktur
Sebastianpillai, Marianna (Master thesis, 2019)Atlantisk laks (Salmo salar) i postsmoltfase er sårbar, og i sjømerder utsettes fisken for sykdommer og miljøbetinget stressfaktorer. En lenger oppholdsperiode i landbasert resirkulerende akvakultur system (RAS) kan redusere ... -
A salty start: Brackish water start-up as a microbial management strategy for nitrifying bioreactors with variable salinity
Navada, Sharada; Sebastianpillai, Marianna; Kolarevic, Jelena; Fossmark, Ragnhild Olsen; Tveten, Ann-Kristin; Gaumet, Frederic; Mikkelsen, Øyvind; Vadstein, Olav (Peer reviewed; Journal article, 2020)Nitrifying biofilms developed in brackish water are reported to be more robust to salinity changes than freshwater biofilms. This makes them a promising strategy for water treatment systems with variable salinity, such as ...