Browsing NTNU Open by Author "Attramadal, Kari"
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Aquaculture rearing systems induce no legacy effects in Atlantic cod larvae or their rearing water bacterial communities
Gundersen, Madeleine S.; Vadstein, Olav; De Schryver, Peter; Attramadal, Kari (Peer reviewed; Journal article, 2022)The microbial rearing quality influences the survival of marine larvae. Microbially matured water treatment systems (MMS) provide a more favourable rearing water microbiome than flow-through systems (FTS). It has previously ... -
Bacterial community assembly in Atlantic cod larvae (Gadus morhua): Contributions of ecological processes and metacommunity structure
Vestrum, Ragnhild Inderberg; Attramadal, Kari; Vadstein, Olav; Gundersen, Madeleine Stenshorne; Bakke, Ingrid (Peer reviewed; Journal article, 2020)Many studies demonstrate the importance of the commensal microbiomes to animal health and development. However, the initial community assembly process is poorly understood. It is unclear to what extent the hosts select for ... -
Biological Nitrogen Removal of Effluents from Amine-based CO2 Capture Plants: Screening, Feasibility and Limitations
Henry, Ingrid Annemarie (Doctoral theses at NTNU;2016:359, Doctoral thesis, 2016)Biological Treatment of Waste from Carbon Capture and Storage (CCS) – Screening, feasibility and limitations. Carbon capture and storage (CCS) is becoming an important technology to combat climate change. In CCS, carbon ... -
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 ... -
Growth and Biochemical Composition of Cultivated Mixed Biofilm on Wastewater from Recirculating Aquaculture Systems (RAS)
Rønning, Lise (Master thesis, 2023)Bruken av Resirkulerende akvakultursystemer (RAS) for å produsere atlantisk laksesmolt (Salmo salar) har økt de siste årene. Med økningen har det imidlertid også blitt uttrykt bekymringer angående miljøforurensningen knyttet ... -
Impacts of Organic Matter Removal Efficiency on the Microbial Carrying Capacity and Stability of Land-Based Recirculating Aquaculture Systems
Nesje, Jenny (Master thesis, 2018)Accumulation of organic matter and particles generated from uneaten feed and faeces is one of the major challenges in recirculating aquaculture systems (RAS), in particular colloidal and dissolved fractions as these serve ... -
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. ... -
Long-term microbial community structures and dynamics in a commercial RAS during seven production batches of Atlantic salmon fry (Salmo salar)
Dahle, Stine Veronica Wiborg; Gaarden, Sunniva Ingebrigtsen; Buhaug, Julia Fossberg; Netzer, Roman; Attramadal, Kari; Busche, Tobias; Aas, Marianne; Ribicic, Deni; Bakke, Ingrid (Peer reviewed; Journal article, 2023)The microbiota of recirculating aquaculture systems (RAS) is of major importance for optimal fish health. However, the microbial communities in commercial RAS are highly complex and more knowledge is needed to potentially ... -
Managing the microbial community of marine fish larvae: a holistic perspective for larviculture
Vadstein, Olav; Attramadal, Kari; Bakke, Ingrid; Forberg, Torunn; Olsen, Yngvar; Verdegem, Marc; Giatsis, C.; Skjermo, Jorunn; Aasen, Inga Marie; Gatesoupe, Francois-Joel; Dirckens, Kristof; Sorgeloos, Patrick; Bossier, Peter (Journal article; Peer reviewed, 2018)The availability of high-quality juveniles is a bottleneck in the farming of many marine fish species. Detrimental larvae-microbe interactions are a main reason for poor viability and quality in larval rearing. In this ... -
Marint RAS-anlegg - For produksjon av laks med gjenbruk av ressursar
Eide, Erlend (Master thesis, 2017)Dei siste åra har produksjonskostnaden i norsk oppdrettsnæring for laks auka som eit resultat av miljøutfordringane næringa står overfor. Mangel på areal, lakselus, sjukdom, rømming og utslepp har tvinga myndigheitene til ... -
Microbial community dynamics in a commercial RAS for production of Atlantic salmon fry (Salmo salar)
Dahle, Stine Veronica Wiborg; Attramadal, Kari; Vadstein, Olav; Hestdahl, Ivar; Bakke, Ingrid (Peer reviewed; Journal article, 2022)Recirculating aquaculture systems (RAS) harbour complex microbial communities which can have an impact on the growth and development of the reared fish. This study aimed to improve our understanding of microbial community ... -
Nephrocalcinosis in juvenile farmed Atlantic salmon
Klykken, Christine (Doctoral theses at NTNU;2023:363, Doctoral thesis, 2023)English summary Good health and welfare of farmed fish is crucial for further growth and development of the fish farming industry in Norway and abroad. Systematic work is being done at all levels of the industry with ... -
OC2017 A-029 - Vannkvalitet og startfôring av rognkjeks - Effekt av fôring med levende copepoder i tidlige faser (FHF prosjekt nr 901174)
Dahle, Stine Veronica Wiborg; Hagemann, Andreas; Attramadal, Kari; Kjørsvik, Elin; Bardal, Tora (Research report, 2017)I oppdrett av rognkjeks benyttes fonnulert tønfor av små partikler fra start, som gir mye forspill i karene. Høy og varierende organisk belastning i systemet gir grobunn for oppblomstring av opportunistiske bakterier ... -
Physiological changes observed in farmed Atlantic salmon (Salmo salar L.) with nephrocalcinosis
Klykken, Christine; Reed, A.K.; Dalum, Alf Seljenes; Olsen, Rolf Erik; Moe, Morten Kaare; Attramadal, Kari; Boissonnot, Lauris Jeannine Ernestine (Peer reviewed; Journal article, 2022)There is a growing concern for fish health and welfare in the salmon industry in Norway. Nephrocalcinosis, described as mineral deposits within the kidney, is increasingly observed. However, little is known about its ... -
Production of lumpfish in RAS with distinct water treatments: Effects on fish survival, growth, gill health and microbial communities in rearing water and biofilm
Dahle, Stine Veronica Wiborg; Bakke, Ingrid; Birkeland, Mari; Nordøy, Kristian; Dalum, Alf Seljenes; Attramadal, Kari (Peer reviewed; Journal article, 2020)Lumpfish in Norway is currently produced in traditional flow-through systems (FTS). Hatcheries frequently show signs of bacterial infections, unstable microbial communities in the rearing water and varying mortality. ... -
Radiological detection of nephrocalcinosis in farmed Atlantic salmon Salmo salar L.
Klykken, Christine; Dalum, Alf Seljenes; Reed, Anne Katrine; Attramadal, Kari; Olsen, Rolf Erik; Boissonnot, Lauris Jeannine Ernestine (Journal article; Peer reviewed, 2022) -
Rearing water treatment induces microbial selection influencing the microbiota and pathogen associated transcripts of cod (Gadus morhua) larvae.
Vestrum, Ragnhild Inderberg; Attramadal, Kari; Winge, Per; Li, Keshuai; Olsen, Yngvar; Bones, Atle M.; Vadstein, Olav; Bakke, Ingrid (Journal article; Peer reviewed, 2018)We have previously shown that K-selection and microbial stability in the rearing water increases survival and growth of Atlantic cod (Gadus morhua) larvae, and that recirculating aquaculture systems (RAS) are compatible ...