Blar i NTNU Open på forfatter "Olsen, Rolf Erik"
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The Effect of Osmotic Pressure on Rigor Mortis in Salmonids
Chan, Sherry Stephanie (Master thesis, 2016)Rigor mortis is a natural phenomenon caused by a series of complicated chemical changes in the muscles after the death of an animal. This concept is important especially in meat technology since it affects texture, yield ... -
The effect of salmon protein hydrolysate on palatability for Atlantic salmon smolts
Alnæs, Maren Elgsaas (Master thesis, 2024)Krav om bedre fiskevelferd og mer bærekraftig akvakultur gjør det nødvendig å finne nye og bedre fôrressurser. Når man vurderer nye ingredienser til fôr, kan valg av strategi ha stor innvirkning på tolkningen av kvaliteten ... -
The Effects of Membrane Filtration in a Recirculating Aquaculture System on Water Quality and Fish Performance of Atlantic Salmon (Salmo salar)
Helberg, Gaute Alexander Nedberg (Master thesis, 2018)Recirculating aquaculture systems (RAS) could be a solution to several of the challenges associated with environmentally sustainable growth of the aquaculture industry. However, high investment and operating costs are ... -
The risk of development of antimicrobial resistance with the use of coccidiostats in poultry diets. Opinion of the Panel on Animal Feed of the Norwegian Scientific Committee for Food Safety
Nesse, Live Lingaas; Bakke, Anne Marie; Eggen, Trine; Hoel, Kristian; Kaldhusdal, Magne; Ringø, Einar; Yazdankhah, Siamak Pour; Lock, Erik-Jan; Olsen, Rolf Erik; Ørnsrud, Robin; Krogdahl, Åshild (VKM Report;, Research report, 2015)Antimicrobials revolutionized human as well as animal medicine in the 20th century by providing effective treatment of diseases caused by pathogenic microorganisms. However, microorganisms have the ability to develop ... -
The β-oxidation pathway is downregulated during diapause termination in Calanus copepods
Skottene, Elise; Tarrant, Ann M.; Olsen, Anders Johny; Altin, Dag; Østensen, Mari-Ann; Hansen, Bjørn Henrik; Choquet, Marvin; Jenssen, Bjørn Munro; Olsen, Rolf Erik (Journal article; Peer reviewed, 2019)Calanus copepods are keystone species in marine ecosystems, mainly due to their high lipid content, which is a nutritious food source for e.g. juvenile fish. Accumulated lipids are catabolized to meet energy requirements ... -
Transcriptional development of phospholipid and lipoprotein metabolism in different intestinal regions of Atlantic salmon (Salmo salar) fry
Jin, Yang; Olsen, Rolf Erik; Østensen, Mari-Ann; Gillard, Gareth Benjamin; Korsvoll, Sven Arild; Santi, Nina; Gjuvsland, Arne Bjørke; Vik, Jon Olav; Torgersen, Jacob Seilø; Sandve, Simen Rød; Olsen, Yngvar (Journal article; Peer reviewed, 2018)Background It has been suggested that the high phospholipid (PL) requirement in Atlantic salmon (Salmo salar) fry is due to insufficient intestinal de-novo synthesis causing low lipoprotein (LP) production and reduced ... -
Transcriptional regulation of lipid metabolism when salmon fry switches from endogenous to exogenous feeding
Jin, Yang; Olsen, Rolf Erik; Østensen, Mari-Ann; Gillard, Gareth Benjamin; Li, Keshuai; Harvey, Thomas Nelson; Santi, Nina; Vadstein, Olav; Vik, Jon Olav; Sandve, Simen Rød; Olsen, Yngvar (Journal article; Peer reviewed, 2018)The onset of first feeding is a critical period for Atlantic salmon (Salmo salar). The fish goes through a dramatic transition, from using the yolk sac as an energy and nutrient resource to rely on exogenous food. However, ... -
Triploid Atlantic salmon in aquaculture - Consequences for fish health and welfare under farming conditions
Rimstad, Espen; Basic, Dean; Espmark, Åsa Maria Olofsdotter; Fraser, Thomas; Gulla, Snorre; Johansen, Johan; Mo, Tor Atle; Olesen, Ingrid; Olsen, Rolf Erik; Bø-Granquist, Erik Georg; Ptochos, Sokratis; Sayyari, Amin; Ytrehus, Bjørnar (VKM Report;2023:22, Research report, 2023) -
Triploid Atlantic salmon × brown trout hybrids have similar seawater growth and welfare issues as triploid Atlantic salmon, but both were heavier at harvest than their diploid counterparts
Fraser, Thomas; Hansen, Tom Johnny; Remø, Sofie C.; Olsen, Rolf Erik; Fjelldal, Per Gunnar (Peer reviewed; Journal article, 2022)Interspecific hybridisation may improve the farm performance of sterile triploid salmonids via heterosis (i.e. hybrid vigour). We assessed growth over the final 293 days in seawater, and harvest quality, in diploid and ... -
Update on GM canola crops as novel sources of omega‐3 fish oils
Napier, Johnathan A.; Olsen, Rolf Erik; Tocher, Douglas R. (Journal article; Peer reviewed, 2018)There is considerable interest in new sources of omega‐3 long‐chain (here defined as fatty acids ≥C20) polyunsaturated fatty acids (LC‐PUFA), specifically eicosapentaenoic acid (EPA; 20:5n‐3) and docosahexaenoic acid (DHA; ... -
Use of fatty acid profiles to monitor the escapehistory of farmed Atlantic salmon
Skilbrei, Ove Tommy; Normann, Eirik; Meier, Sonnich; Olsen, Rolf Erik (Journal article; Peer reviewed, 2015)Farmed Atlantic salmon can escape from fish farms at various stages of their life, from juveniles to large mature fish. Escapees that enter rivers to spawn pose a threat to the genetic integrity of wild populations. ... -
Use of probiotics in aquaculture of China—a review of the past decade
Wang, Anran; Ran, Chao; Wang, Yanbo; Zhang, Zhen; Ding, Qianwen; Yang, Yalin; Olsen, Rolf Erik; Ringø, Einar; Bindelle, Jérôme; Zhou, Zhigang (Peer reviewed; Journal article, 2019)China is the largest aquaculture producer in the world. Antibiotics were extensively used to ensure the development of the intensive aquaculture; however, the use of antibiotics causes safety- and environment-associated ...