Browsing NTNU Open by Author "Bakke, Ingrid"
Now showing items 61-80 of 80
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Nitrifying biofilms deprived of organic carbon show higher functional resilience to increases in carbon supply
Navada, Sharada; Knutsen, Maja F.; Bakke, Ingrid; Vadstein, Olav (Peer reviewed; Journal article, 2020)In nitrifying biofilms, the organic carbon to ammonia nitrogen (C/N) supply ratio can influence resource competition between heterotrophic and nitrifying bacteria for oxygen and space. We investigated the impact of acute ... -
A novel gnotobiotic experimental system for Atlantic salmon ( Salmo salar L.) reveals a microbial influence on mucosal barrier function and adipose tissue accumulation during the yolk sac stage
Gomez de la Torre Canny, Sol; Nordgård, Catherine Taylor; Mathisen, Amalie johanne Horn; Degré Lorentsen, Eirik; Vadstein, Olav; Bakke, Ingrid (Peer reviewed; Journal article, 2023)Gnotobiotic models have had a crucial role in studying the effect that commensal microbiota has on the health of their animal hosts. Despite their physiological and ecological diversity, teleost fishes are still underrepresented ... -
Phage therapy minimally affects the water microbiota in an Atlantic salmon (Salmo salar) rearing system while still preventing infection
Fiedler, Alexander Willi; Gundersen, Madeleine S.; Vo, Toan Phuc; Almaas, Eivind; Vadstein, Olav; Bakke, Ingrid (Peer reviewed; Journal article, 2023)Excessive usage of antibiotics threatens the bacterial diversity in the microbiota of animals. An alternative to antibiotics that has been suggested to not disturb the microbiota is (bacterio)phage therapy. In this study, ... -
Production of lumpfish (Cyclopterus lumpus L.) 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 Johanne Kihle (Peer reviewed; Journal article, 2020)Lumpfish (Cyclopterus lumpus L.) 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 ... -
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. ... -
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 ... -
Rheology of skin mucus from yolk-sac salmon fry
Nordgård, Catherine Taylor; Gomez de la Torre Canny, Sol; Dunker, Karen; Sletmoen, Marit; Bakke, Ingrid (Journal article; Peer reviewed, 2020)As part of our project “Microbial contributions to the Atlantic salmon (Salmo salar) skin mucosal barrier” we have explored techniques to investigate and characterise the rheological properties of the skin mucus of yolk-sac ... -
Robustness of nitrifying biofilter functionality: Role of competition between heterotrophic and nitrifying bacteria on ammonium removal efficiency and microbial community structure
Knutsen, Maja Fjellstad (Master thesis, 2017)Removal of ammonium by nitrification in biofilm systems is a common method in wastewater treatment. The ammonium removal efficiency in the nitrification process is influenced by the competition between nitrifying bacteria ... -
Salinity as a driver for microbial community structure in reactors for nitrification and anammox
Silva, Blanca Magdalena Gonzalez (Doctoral theses at NTNU;2016:365, Doctoral thesis, 2016)The removal of nitrogen from wastewater has become an important part of the overall treatment process due to the significant impact of nitrogen compounds (NH4–N, NOx–N) on the environment and the more stringent legislation ... -
The stability and composition of the gut and skin microbiota of Atlantic salmon throughout the yolk sac stage
Fiedler, Alexander Willi; Drågen, Martha Kristine Rindarøy; Degré Lorentsen, Eirik; Vadstein, Olav; Bakke, Ingrid (Peer reviewed; Journal article, 2023)The bacterial colonization of newly hatched fish is important for the larval development and health. Still, little is known about the ontogeny of the early microbiota of fish. Here, we conducted two independent experiments ... -
Start-up of a nitrifying MBBR biofilter for a pilot-RAS operated at high salinity for grow-out salmon at Havlandet
Tesdal, Veslemøy (Master thesis, 2021)Den økende etterspørselen etter mat produsert på en miljøvennlig måte kan delvis bli løst med fiskeproduksjon i landbaserte resirkulerende akvakulturelle system (RAS). Vannet i RAS blir mekanisk og mikrobiologisk renset ... -
Temporal Development of the Gut Microbiota in European Lobster (Homarus gammarus) Juveniles Exposed to Two Different Water Treatment Systems
Kristensen, Elisabeth (Master thesis, 2015)Aquaculture today exploits only a limited number of species for production and there is a need to utilize novel species. One such species that could contribute to meeting the demands of the market is the European lobster. ... -
The effect of membrane filtration on the microbial communities associated with rearing water, gut and skin mucus of Atlantic salmon parr (Salmo salar) in recirculating aquaculture systems (RAS)
Bugten, Anette Voll (Master thesis, 2018)Fish are constantly in contact with microorganisms in the surrounding environment, and their mucosal surfaces; skin, gills and the gastrointestinal tract are colonized by microbiota that play vital functions for their ... -
The effect of organic load on the rearing water and biofilter biofilm microbiota across the freshwater and brackish water phases in RAS with Atlantic salmon (Salmo salar)
Stenhaug, Stian Ringbakken (Master thesis, 2023)Oppdrett av Atlantisk laks opplever for tiden betydelig vekst innenfor landbaserte resirkulerende akvakultursystemer, spesielt for smoltproduksjon. Biofilteret i RAS spiller en avgjørende rolle i å opprettholde ideell ... -
The effect of r- and K-selection on planktonic microbial community characteristics in lab-scale bioreactors
Gundersen, Madeleine Stenshorne (Master thesis, 2019)Miljøer med tilgjengelige ressurser, tomme nisjer og mye plass selekterer for r-strategiske organismer som har høye maksimale vekstrater. K-strateger, derimot, har høyere substrat affinitet og utnyttelses effektivitet, som ... -
The effects of gut microbiota on fitness in Daphnia magna
Obrestad, Kathrine (Master thesis, 2020)Samlingen av mikrobielle samfunn i magetarmkanalen er formet av vertens genetikk, individer innen samme art og habitat, og miljøfaktorer. Endringer i sammensetningen til det mikrobielle samfunnet kan påvirke vertens fysiske ... -
The impact of washing procedures on nitrifying capacity and bacterial community composition of Leca biofilms in nitrifying biofilters at VEAS
Håberg, Elin (Master thesis, 2021)Hos Vestfjorden Avløpsselskap (VEAS) blir nitrifikasjon utført i ein “fast film prosess” der lett ekspandert leireaggregat (LECA) blir brukt som berermateriale for biofilm. Vask av desse nitrifiserande biofiltra er nødvendig ... -
The Role of Lipocalin 2 in the Shaping of the Gastrointestinal Microbiota and Development of Inflammatory Bowel Disease in Mice
Leistad, Espen Bang (Master thesis, 2013)The gastrointestinal microbiota have long been associated with health and disease in humans. Inflammatory bowel disease (IBD) is a disease thought to arise from a dysfunctional immune response to the commensal microbiota ... -
Understanding structure/function relationships in nitrifying microbial communities after cross-transfer between freshwater and seawater
Gonzalez Silva, Blanca Magdalena; Jonassen, Kjell Rune; Bakke, Ingrid; Østgaard, Kjetill; Vadstein, Olav (Peer reviewed; Journal article, 2021)In this study, nitrification before and after abrupt cross-transfer in salinity was investigated in two moving bed biofilm reactors inoculated with nitrifying cultures that had adaptation to freshwater (FR) and seawater ... -
UV treatment in RAS influences the rearing water microbiota and reduces the survival of European lobster larvae (Homarus gammarus)
Attramadal, Kari J.K.; Øien, John Vegard; Kristensen, Elisabeth; Evjemo, Jan Ove; Kjørsvik, Elin; Vadstein, Olav; Bakke, Ingrid (Peer reviewed; Journal article, 2021)The rearing environment is important for a stable production of good quality lobster juveniles. By providing an environment excluding pathogens and dominated by mutualistic bacteria, the probability of developing healthy ...