Blar i NTNU Open på forfatter "Olsen, Rolf Erik"
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Fiskefysiologi
Olsen, Rolf Erik; Finstad, Bengt (Book, 2024) -
Fiskeveldferdsmessig betydning av daglig rengjøring av maskin under vaksinering
Skjelstadås, Tonje; Eithun, Siri (Bachelor thesis, 2023)I denne oppgaven er det gjennomført en ståstedsanalyse av settefiskanleggs rengjøringsprosedyrer knyttet til rengjøring av vaksinemaskin levert av Maskon. Det er gjennomført rengjøringstester for å undersøke effekten av ... -
Forbedre eksisterende løsning på nedvask av smoltkar ved generasjonsskifte.
Helle, Nora Baglo; Markussen, Jim Seo (Bachelor thesis, 2023)Oppgaven tar for seg eksisterende løsning for nedvask av smoltkar ved generasjonsskifte av laks hos Mowi ASA avd. Nordheim. Dagens løsning som brukes ved anlegget blir presentert. Det blir sett på de ulike alternativene ... -
Growth performance, hepatic enzymes, and gut health status of common carp (Cyprinus carpio) in response to dietary Cetobacterium somerae fermentation product
Xie, Mingxu; Hao, Qiang; Olsen, Rolf Erik; Ringø, Einar; Yang, Yalin; Zhang, Zhen; Ran, Chao; Zhou, Zhigang (Peer reviewed; Journal article, 2022)Intensive aquaculture practices compromise the health of fish. Probiotics especially those isolated from aquatic animals play important roles in improving fish health. The aim of the study was to evaluate the effects of ... -
Habituation and conditioning in gilthead sea bream (Sparus aurata): Effects of aversive stimuli, reward and social hierarchies
Folkedal, Ole; Fernö, Anders; Nederlof, Marit A. J.; Fosseidengen, Jan Erik; Cerqueira, Marco; Olsen, Rolf Erik; Jonatan, Nilsson (Journal article; Peer reviewed, 2017)To tailor the farming environment to a fish species, we should understand the species-specific responses to stimuli, including the degree of adaption and learning. Groups of gilthead sea bream were given a delay Pavlovian ... -
Hydrolysis activity of pyloric cecal enterocytes of brown trout (Salmo trutta) toward monoacylglycerol and lysophosphatidylcholine
Li, Keshuai; Egelandsdal, Bjørg; Olsen, Rolf Erik (Journal article; Peer reviewed, 2018)Some lipid digestion pathways in fish deviate from those in mammals, and many differences may also be species dependent. This report describes a pathway for monoacylglycerol (MAG) and lysophospholipid absorption by intestinal ... -
Immunological effects of acute stress and immunostimulant feed in Atlantic salmon (Salmo salar)
Lippestad, Ludvik (Master thesis, 2020)Sykdom er en stor utfordring for akvakulturnæringen, og forårsaker store tap. Med et mål om å redusere belastningen av sykdom, kan utsettelse for akutt stress og fôring av immunostimulanter potensielt øke immunkapasiteten ... -
Immunomodulatory effect of different dietary ARA/EPA/DHA ratios in gilthead sea bream (Sparus aurata) juveniles after infection with Photobacterium damselae subsp. piscicida
Magalhães, Rui; Guardiola, Francisco Abellán; Guerreiro, Inês; Fontinha, Filipa; Moutinho, Sara; Serra, Cláudia Reis; Olsen, Rolf Erik; Peres, Helena; Oliva-Teles, Aires (Peer reviewed; Journal article, 2022)The immunomodulatory effect of different dietary arachidonic acid (ARA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA) ratios was evaluated in gilthead sea bream juveniles after intraperitoneal injection ... -
Impact of Antioxidant Feed and Growth Manipulation on the Redox Regulation of Atlantic Salmon Smolts
Yin, Peng; Bjørnsson, Bjørn Thrandur; Fjelldal, Per Gunnar; Saito, Takaya; Remø, Sofie C.; Edvardsen, Rolf Brudvik; Hansen, Tom Johnny; Sharma, Sandeep; Olsen, Rolf Erik; Hamre, Kristin (Peer reviewed; Journal article, 2022)Accumulating evidence indicates a close relationship between oxidative stress and growth rate in fish. However, the underlying mechanisms of this relationship remain unclear. This study evaluated the combined effect of ... -
Impact of dietary carbohydrate/protein ratio on hepatic metabolism in land-locked Atlantic salmon (Salmo salar L.)
Betancor, Mónica B.; Olsen, Rolf Erik; Marandel, Lucie; Skulstad, Ole Fredrik; Madaro, Angelico; Tocher, Douglas R.; Panserat, Stephane (Journal article; Peer reviewed, 2018)A common-garden experiment was carried out to compare two genetically distinct strains of Atlantic salmon (Salmo salar) fed diets with either high (CHO) or low (NoCHO) digestible carbohydrate (starch). Twenty salmon from ... -
Implantable sensing technologies for monitoring of behavioural and physiological dynamics in farmed Atlantic salmon
Svendsen, Eirik (Doctoral theses at NTNU;2023:339, Doctoral thesis, 2023)Atlantic salmon aquaculture is a major food industry with 1.5 million tonnes produced for worldwide consumption in 2022. However, in Norway during the same year, current farming methods resulted in a 17.1% mortality rate ... -
Intestinal health in Atlantic salmon post-smolt (Salmo salar) when fed low- and high HUFA diets
Løvmo, Signe Dille; Sundh, Henrik; Whatmore, Paul; Nordvi, Malene Fosse; Sigholt, Trygve; Madaro, Angelico; Bardal, Tora; Olsen, Rolf Erik (Peer reviewed; Journal article, 2022)It is well established that farmed Atlantic salmon (Salmo salar) need n3-highly unsaturated fatty acids (HUFA) in their diet to thrive and grow. However, the biological functions to the individual HUFAs may differ, implying ... -
Intestinal uptake of polystyrene (PS) and polyethylene terephthalate (PET) nanoplastic particles in the Atlantic salmon (Salmo salar) parr and post-smolt, and translocation of PET nanoplastic particles to the circulatory system and liver in parr.
Gundersen, Gina Almås (Master thesis, 2019)Mikro- (20 µm – 5 mm) og nano- (< 20 µm) plast utgjør i dag en stor miljøbekymring gjennom akkumulering i marine miljø. Nyere studier viser også at marine vertebrater og invertebrater inntar plastpartikler og at disse ... -
Konstruksjon av flytende protein skimmer for redusert bakterievekst og partikkelforekomst i yngelproduksjon av atlantisk torsk (Gadus morhua)
Stenersen, Tommy Kvamsø; Ødegård, Nicholas Fraser (Bachelor thesis, 2023)I dette prosjektet har gruppen hatt som oppgave å designe og konstruere en ny flytende protein skimmer for Ode Group AS sitt landbaserte settefiskanlegg lokalisert på Stadsbygd i Trøndelag. Protein skimmere er i akvakultur ... -
Lipid metabolism in Calanus finmarchicus is sensitive to variations in predation risk and food availability
Skottene, Elise; Tarrant, Ann M.; Altin, Dag; Olsen, Rolf Erik; Choquet, Marvin; Kvile, Kristina Øie (Peer reviewed; Journal article, 2020)Late developmental stages of the marine copepods in the genus Calanus can spend extended periods in a dormant stage (diapause) that is preceded by the accumulation of large lipid stores. We assessed how lipid metabolism ... -
Low intestinal inflammation model (HP48) in Atlantic salmon (Salmo salar) and inflammatory mitigation by Bactocell
Nordvi, Malene Fosse; Løvmo, Signe Dille; Whatmore, Paul; Sundh, Henrik; Sigholt, Trygve; Olsen, Rolf Erik (Peer reviewed; Journal article, 2022)Moderate levels of intestinal damage and inflammation are often seen in intensive fish aquaculture. The causes may be due to antinutrients from plant meals, stress or other causes. There is currently a lack of good models ... -
Lower trophic level mixed fishery (LOTROMIX) - Implications for ecosystem and management
Nørstebø, Jo Trelvik (Master thesis, 2017)There is an increasing interest in new marine resources for the production of aquaculture feed, to meet the increasing growth of the aquaculture industry. Marine species from lower trophic levels are a potential resource ... -
M.o.T. Mobilmelker og Torsk
Andreassen, John – Halstein; Fanavoll, Trym Persson; Hua, Sandra Hui Min (Bachelor thesis, 2023)Dagens situasjon på ODE sitt gjennomstrømninganlegg for torsk på Stadsbygd gjennomføres røkting av fiskekar ved et hevertsystem. På grunn av lave strømningshastigheter i karene fører dette til oppsamling av partikler på ... -
Mid and hindgut transcriptome profiling analysis of Atlantic salmon (Salmon salar) under unpredictable chronic stress
Løvmo, Signe Dille; Madaro, Angelico; Whatmore, Paul; Bardal, Tora; Østensen, Mari-Ann; Sandve, Simen Rød; Olsen, Rolf Erik (Peer reviewed; Journal article, 2020)The intestinal epithelium is a selectively permeable barrier for nutrients, electrolytes and water, while maintaining effective protection against pathogens. Combinations of stressors throughout an animal's life, especially ... -
Molecular Mechanism Involved in Carotenoid Metabolism in Post-Smolt Atlantic Salmon: Astaxanthin Metabolism During Flesh Pigmentation and Its Antioxidant Properties
Schmeisser, Jerome; Verlac-Trichet, Viviane; Madaro, Angelico; Lall, Santosh P.; Torrissen, Ole; Olsen, Rolf Erik (Peer reviewed; Journal article, 2021)A better understanding of carotenoid dynamics (transport, absorption, metabolism, and deposition) is essential to develop a better strategy to improve astaxanthin (Ax) retention in muscle of Atlantic salmon. To achieve ...