Blar i Institutt for biologi på forfatter "Olsen, Rolf-Erik"
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Algal oil gives control of long-chain omega-3 levels in full-cycle production of Atlantic salmon, without detriment to zootechnical performance and sensory characteristics
Santigosa, Ester; Olsen, Rolf-Erik; Madaro, Angelico; Verlhac Trichet, Viviane; Carr, Ian (Peer reviewed; Journal article, 2023)The levels of eicosapentaenoic (EPA) and docosahexaenoic (DHA) in salmon fillets have decreased because of the progressive replacement of fish oil (FO). This study contributes to enabling the sustainable growth of aquaculture ... -
Comparison of organic and conventional food and food production. Part II: Animal health and welfare in Norway
Bøe, Knut Egil; Bernhoft, Aksel; Hansen, Inger; Hoel, Kristian; Moe, Randi Oppermann; Seehus, Siri Christine; Svihus, Birger; Whist, Anne C; Østerås, Olav; Andreassen, Åshild Kristine; Arukwe, Augustine; Braastad, Bjarne Olai; Erikson, Ulf Gøran; Haugen, Margaretha; Hemre, Gro Ingunn; Hjeltnes, Brit Kristine; Krogdahl, Åshild; Källqvist, Torsten; Lassen, Jørgen Fredrik; Mortensen, Stein Håkon; Næss, Bjørn; Olsen, Rolf-Erik; Rimstad, Espen; Skåre, Janneche Utne; Steffensen, Inger-Lise; Sundheim, Leif; Torrissen, Ole; Alexander, Jan (VKM Report;, Research report, 2014) -
Data for characterization of the optical properties of Atlantic salmon (Salmo salar) blood
Svendsen, Eirik; Randeberg, Lise Lyngsnes; Føre, Martin; Finstad, Bengt; Olsen, Rolf-Erik; Bloecher, Nina; Alfredsen, Jo Arve (Peer reviewed; Journal article, 2023)Photoplethysmography is a recent addition to physio-logging in Atlantic salmon which can be used for pulse oximetry provided that the properties for light propagation in salmon tissues are known. In this work, optical ... -
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 ARA, DHA, and Carbohydrate Ratios Affect the Immune Status of Gilthead Sea Bream Juveniles upon Bacterial Challenge
Magalhães, Rui; Martins, Nicole; Fontinha, Filipa; Olsen, Rolf-Erik; Serra, Claudia Reis; Peres, Helena; Oliva-Teles, Aires (Peer reviewed; Journal article, 2023)This study aims to assess the effects of different dietary n-6/n-3 long-chain polyunsaturated fatty acid ratios and CHO content in the immune response of gilthead seabream. For that purpose, gilthead sea bream juveniles ... -
ECG augmented pulse oximetry in Atlantic salmon (Salmo salar)—A pilot study
Svendsen, Eirik; Føre, Martin; Randeberg, Lise Lyngsnes; Olsen, Rolf-Erik; Finstad, Bengt; Remen, Mette; Bloecher, Nina; Alfredsen, Jo Arve (Peer reviewed; Journal article, 2023)Understanding the tolerance limits of fish is crucial for developing aquaculture operations that ensure good animal welfare. However, there exist little data describing the physiological responses in farmed Atlantic salmon, ... -
Effects of nuclease-treated fermentation product of Lactobacillus rhamnosus GCC-3 on growth, hepatic health and gut microbiota of zebrafish (Danio rerio) fed a high-fat diet
Xie, Mingxu; Li, Ming; Hao, Qiang; Olsen, Rolf-Erik; Ringø, Einar; Yang, Yalin; Zhang, Zhen; Ran, Chao; Zhou, Zhigang (Peer reviewed; Journal article, 2023)Probiotics are reported to improve the nutrition, immunity, and health of fish. Nuclease can hydrolyze nucleic acids of probiotics to produce nucleotides. The present study investigated the effect of stabilized fermentation ... -
Lipid metabolism and diapause timing in Calanus copepods: The impact of predation risk, food availability and oil exposure
Skottene, Elise (Doctoral theses at NTNU;2021:355, Doctoral thesis, 2021)Calanoid copepods of the Calanus genus have an important ecological role as energetic links between primary producers and higher trophic level species in the North Atlantic and Arctic Oceans. Most individuals spend a large ... -
Marine-derived products as functional feed additives in aquaculture: A review
Van Doan, Hien; Prakash, Parvathy; Hoseinifar, Seyed Hossein; Ringø, Einar; El-Haroun, Ehab; Faggio, Caterina; Olsen, Rolf-Erik; Tran, Hung Quang; Stejskal, Vlastimil; Abdel-Latif, Hany M.R.; Dawood, Mahmoud A.O. (Peer reviewed; Journal article, 2023)The aquaculture industry is expanding to meet the daily requirements of humanity from high-quality seafood. In this regard, intensive aquaculture systems are suggested, resulting in high production but being challenged ... -
Replacing fishmeal with salmon hydrolysate reduces the expression of intestinal inflammatory markers and modulates the gut microbiota in Atlantic salmon (Salmo salar)
Sandbakken, Ingrid Schafroth; Su, Hang; Johansen, Louise; Zhang, Yupeng; Ringø, Einar; Røsbak, Randi; Yakovlev, Igor; Five, Kathrine Kjos; Olsen, Rolf-Erik (Journal article; Peer reviewed, 2024) -
Seasonal Changes in Photoperiod: Effects on Growth and Redox Signaling Patterns in Atlantic Salmon Postsmolts
Yin, Peng; Saito, Takaya; Fjelldal, Per Gunnar; Björnsson, Björn Thrandur; Remø, Sofie C.; Hansen, Tom Johnny; Sharma, Sandeep; Olsen, Rolf-Erik; Hamre, Kristin (Peer reviewed; Journal article, 2023)Farmed Atlantic salmon reared under natural seasonal changes in sea-cages had an elevated consumption of antioxidants during spring. It is, however, unclear if this response was caused by the increase in day length, ... -
The use of light, restrictive feeding, fibrous feed and stocking density and the consequences for animal welfare for poultry species kept in Norway - Scientific Opinion of the Panel on Animal Health and Welfare of the Norwegian Scientific Committee for Food and Environment
Bøe, Knut Egil; Grahek-Ogden, Danica; Hoel, Kristian; Gjøen, Tor; Godfroid, Jacques Xavier Leon; Janczak, Andrew Michael; Madslien, Knut; Olsen, Rolf-Erik; Rimstad, Espen; Øverli, Øyvind; Agdestein, Angelika (Peer reviewed; Journal article, 2022) -
Under the sea: How can we use heart rate and accelerometers to remotely assess fish welfare in salmon aquaculture?
Morgenroth, Daniel; Kvæstad, Bjarne; Økland, Finn; Finstad, Bengt; Olsen, Rolf-Erik; Svendsen, Eirik; Rosten, Carolyn; Axelsson, Michael; Bloecher, Nina; Føre, Martin; Gräns, Albin (Peer reviewed; Journal article, 2023)Recent advances in bio-sensing technologies open for new possibilities to monitor and safeguard the welfare of fishes in aquaculture. Yet before taken into practice, the applicability of all novel biosensors must be ...