Browsing Artikler / Articles by Author "Johansen, Lill-Heidi"
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Assessing Peracetic Acid Application Methodology and Impacts on Fluidized Sand Biofilter Performance
Lepine, Christine; Redman, Natalie; Murray, Megan; Lazado, Carlo C.; Johansen, Lill-Heidi; Espmark, Åsa Maria Olofsdotter; Davidson, John; Good, Christopher (Peer reviewed; Journal article, 2023)Nitrifying biofilters oxidize harmful ammonia excreted by fish into less toxic nitrate within recirculating aquaculture systems (RAS). Biofilter performance and resulting RAS water quality largely depend on a robust ... -
Atlantic salmon (Salmo salar) mounts systemic and mucosal stress responses to peracetic acid
Soleng, Malene; Johansen, Lill-Heidi; Johnsen, Hanne; Johansson, Gunhild Seljehaug; Breiland, Mette Serine Wesmajervi; Rørmark, Lisbeth; Pittman, Karin; Pedersen, Lars-Flemming; Lazado, Carlo C. (Peer reviewed; Journal article, 2019)Peracetic acid (PAA), a strong organic peroxide, is considered a relatively sustainable disinfectant in aquaculture because of its broad effectivity against many pathogens at low concentrations and because it degrades ... -
Climate change with increasing seawater temperature will challenge the health of farmed Atlantic Cod (Gadus morhua L.)
Ytteborg, Elisabeth; Falconer, Lynne; Krasnov, Aleksei; Johansen, Lill-Heidi; Timmerhaus, Gerrit; Johansson, Gunhild Seljehaug; Afanasyev, Sergey; Høst, Vibeke; Hjøllo, Solfrid Sætre; Hansen, Øyvind J; Lazado, Carlo C. (Peer reviewed; Journal article, 2023) -
Consequences of continuous ozonation on the health and welfare of Atlantic salmon post-smolts in brackish water recirculating aquaculture system
Lazado, Carlo C.; Stiller, Kevin Torben; Reiten, Britt Kristin Megård; Osório, João; Kolarevic, Jelena; Johansen, Lill-Heidi (Peer reviewed; Journal article, 2021)This study investigated the biological consequences of 45-day continuous ozonation on Atlantic salmon (Salmo salar) post-smolts in a brackish water recirculating aquaculture system (RAS). There was no significant difference ... -
Deep neural network analysis - a paradigm shift for histological examination of health and welfare of farmed fish
Sveen, Lene; Timmerhaus, Gerrit; Johansen, Lill-Heidi; Ytteborg, Elisabeth (Peer reviewed; Journal article, 2021)An artificial intelligence model (AI-model) was trained for the first time to detect multi-class segmentation of skin from Atlantic salmon, using a convolutional neural network (Aiforia®). The AI-model was developed to ... -
Development of Atlantic Salmon (Salmo salar L.) Under Hypoxic Conditions Induced Sustained Changes in Expression of Immune Genes and Reduced Resistance to Moritella viscosa
Krasnov, Aleksei; Burgerhout, Erik; Johnsen, Hanne; Tveiten, Helge; Bakke, Anne Flore; Lund, Hege; Afanasyev, Sergey; Rebl, Alexander; Johansen, Lill-Heidi (Peer reviewed; Journal article, 2021)Atlantic salmon is characterized with high sensitivity to low dissolved oxygen (DO) levels. Hypoxia can affect diverse biological processes with consequences that can be manifested immediately or with delay. Effects of ... -
Development of cod farming in Norway: Past and current biological and market status and future prospects and directions
Puvanendran, Velmurugu; Mortensen, Atle; Johansen, Lill-Heidi; Kettunen, Anne Helena; Hansen, Øyvind J; Henriksen, Edgar; Heide, Morten (Peer reviewed; Journal article, 2022)Atlantic cod is a historically abundant species in the North Atlantic region and has contributed to the prosperity of many nations. But a decline in stocks in the last century has prompted to initiate commercial farming ... -
Effects of dietary lipid level on growth, digestive physiology and disease resistance in lumpfish (Cyclopterus lumpus)
Berge, Gerd Marit; Zhou, Weiwen; Johansen, Lill-Heidi; Chikwati, Elvis Mashingaidze; Kortner, Trond M.; Lein, Ingrid; Krogdahl, Åshild (Peer reviewed; Journal article, 2023)Lumpfish (Cyclopterus lumpus) aquaculture has expanded greatly in recent years due to demands for sea lice cleanerfish from the salmon industry. There are knowledge gaps in lumpfish digestive physiology, nutrient requirement ... -
Expert-driven methodology to assess and predict the effects of drivers of change on vulnerabilities in a food supply chain: Aquaculture of Atlantic salmon in Norway as a showcase
Marvin, Hans J.P.; van Asselt, Esther; Kleter, Gijs; Meijer, Nathan; Lorentzen, Grete Elisabeth; Johansen, Lill-Heidi; Hannisdal, Rita; Sele, Veronika; Bouzembrak, Yamine (Peer reviewed; Journal article, 2020) -
Impact of a candidate vaccine on the dynamics of salmon lice (Lepeophtheirus salmonis) infestation and immune response in Atlantic salmon (Salmo salar L.)
Swain, Jaya Kumari; Carpio, Yamila; Johansen, Lill-Heidi; Velazquez, Janet; Hernandez, Liz; Leal, Yeny; Kumar, Ajey; Estrada, Mario Pablo (Peer reviewed; Journal article, 2020)Infection with parasitic copepod salmon louse Lepeophtheirus salmonis, represents one of the most important limitations to sustainable Atlantic salmon (Salmo salar L.) farming today in the North Atlantic region. The parasite ... -
Influence of dietary supplementation of probiotic pediococcus acidilactici MA18/5M during the transition from freshwater to seawater on intestinal health and microbiota of atlantic salmon (Salmo salar L.)
Jaramillo-Torres, Alexander; Rawling, Mark D.; Rodiles, Ana; Mikalsen, Heidi Eileen; Johansen, Lill-Heidi; Tinsley, John; Forberg, Torunn; Aasum, Elisabeth; Castex, Mathieu; Merrifield, Daniel Lee (Peer reviewed; Journal article, 2019) -
Intermittent administration of peracetic acid is a mild environmental stressor that elicits mucosal and systemic adaptive responses from Atlantic salmon post-smolts
Osório, João; Stiller, Kevin Torben; Reiten, Britt Kristin Megård; Kolarevic, Jelena; Johansen, Lill-Heidi; Afonso, Fernando; Lazado, Carlo C. (Peer reviewed; Journal article, 2022)Background Fish encounter oxidative stress several times during their lifetime, and it has a pervasive influence on their health and welfare. One of the triggers of oxidative stress in fish farming is the use of oxidative ... -
Nasal responses to elevated temperature and Francisella noatunensis infection in Atlantic cod (Gadus morhua)
Lazado, Carlo C.; Iversen, Marianne; Johansen, Lill-Heidi; Brenne, Hanne Britt; Sundaram, Arvind; Ytteborg, Elisabeth (Peer reviewed; Journal article, 2023)We report the histological and transcriptomic changes in the olfactory organ of Atlantic cod exposed to Francisella noatunensis. Experimental infection was performed at either 12oC or 17oC. Infected fish presented the ... -
The optimum velocity for Atlantic salmon post-smolts in RAS is a compromise between muscle growth and fish welfare
Timmerhaus, Gerrit; Lazado, Carlo C.; Cabillon, Nikko Alvin; Reiten, Britt Kristin Megård; Johansen, Lill-Heidi (Peer reviewed; Journal article, 2021)It is increasingly common to rear Atlantic salmon smolts for longer periods in recirculating aquaculture systems (RAS) before transfer to sea cages. The conditions for this part of the life cycle are currently being ... -
The skin mucosal barrier of lumpfish (Cyclopterus lumpus L.) is weakened by exposure to potential aquaculture production related stressors
Ytteborg, Elisabeth; Lazado, Carlo C.; Noble, Christopher; Hansen, Roy-Inge; Johansen, Lill-Heidi (Peer reviewed; Journal article, 2023)Various cleaner fish species, such as the lumpfish (Cyclopterus lumpus L.), are used in the sea cage production of Atlantic salmon (Salmo salar L.) as a control measure against the ectoparasitic salmon louse (Lepeophtheirus ... -
Transcriptome Responses of Atlantic Salmon (Salmo salar L.) to Viral and Bacterial Pathogens, Inflammation, and Stress
Krasnov, Aleksei; Johansen, Lill-Heidi; Karlsen, Christian; Sveen, Lene; Ytteborg, Elisabeth; Timmerhaus, Gerrit; Lazado, Carlo C.; Afanasyev, Sergey (Peer reviewed; Journal article, 2021)Transcriptomics provides valuable data for functional annotations of genes, the discovery of biomarkers, and quantitative assessment of responses to challenges. Meta-analysis of Nofima’s Atlantic salmon microarray database ... -
Variation in volatile organic compounds in Atlantic salmon mucus is associated with resistance to salmon lice infection
Difford, Gareth Frank; Haugen, John-Erik; Aslam, Muhammad Luqman; Johansen, Lill-Heidi; Breiland, Mette Serine Wesmajervi; Hillestad, B.; Baranski, Matthew; Boison, Solomon Antwi; Moghadam, Hooman; Jacq, Celeste (Peer reviewed; Journal article, 2022)Salmon lice are ectoparasites that threaten wild and farmed salmonids. Artificial selection of salmon for resistance to the infectious copepodid lice stage currently relies on in vivo challenge trials on thousands of salmon ...