Browsing NTNU Open by Author "Olsen, Rolf Erik"
Now showing items 21-40 of 93
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DHA Suppresses Hepatic Lipid Accumulation via Cyclin D1 in Zebrafish
Ding, Qianwen; Hao, Qiang; Zhang, Qingshuang; Yang, Yalin; Olsen, Rolf Erik; Ringø, Einar; Ran, Chao; Zhang, Zhen; Zhou, Zhigang (Peer reviewed; Journal article, 2022)With the widespread use of high-fat diets (HFDs) in aquaculture, fatty livers are frequently observed in many fish species. The aim of this study was to investigate if docosahexaenoic acid (DHA) could be used to reduce the ... -
Dietary Succinate Impacts the Nutritional Metabolism, Protein Succinylation and Gut Microbiota of Zebrafish
Ding, Qianwen; Lu, Chenyao; Hao, Qiang; Zhang, Qingshuang; Yang, Yalin; Olsen, Rolf Erik; Ringø, Einar; Ran, Chao; Zhang, Zhen; Zhou, Zhigang (Journal article; Peer reviewed, 2022) -
Dietary supplementation of commensal Cetobacterium somerae ameliorates the problems associated with fish meal replacement by plant proteins in fish
Xie, Mingxu (Doctoral theses at NTNU;2022:380, Doctoral thesis, 2022)Aquaculture is growing at high speed and the expansion of aquaculture production has been accompanied by the rapid increase in aquafeed production. Fish meal (FM) has been traditionally the first choice of protein source ... -
Dietary supplementation of exopolysaccharides from Lactobacillus rhamnosus GCC-3 improved the resistance of zebrafish against spring viremia of carp virus infection
Xie, Mingxu; Li, Yu; Olsen, Rolf Erik; Ringø, Einar; Yang, Yalin; Zhang, Zhen; Ran, Chao; Zhou, Zhigang (Peer reviewed; Journal article, 2022)Spring viremia of carp virus (SVCV) can cause high mortality of fish. The aim of this study was to investigate the effects of Lactobacillus rhamnosus GCC-3 exopolysaccharides (GCC-3 EPS) on zebrafish (Danio rerio) infected ... -
Effect of dietary ARA/EPA/DHA ratios on growth performance and intermediary metabolism of gilthead sea bream (Sparus aurata) juveniles
Magalhães, Rui Pedro Moreira de; Guerreiro, Ines; Coutinho, Felipe; Moutinha, Sara; Sousa, S.; Delerue-Matos, Christina; Domingues, Valentina F.; Olsen, Rolf Erik; Peres, Helena; Oliva-Teles, Aires (Peer reviewed; Journal article, 2019)Vegetable oils (VO) are generally accepted as valuable alternatives to fish oils but are devoid of n-3 LC-PUFA (Long-Chain-Polyunsaturated Fatty Acids) and rich in C18-PUFA. Marine fish have limited capacity to express ... -
Effect of dietary components on the gut microbiota of aquatic animals. A never-ending story?
Ringø, Einar; Zhou, Zhigang; Vecino, Jose L. González; Wadsworth, Simon L.; Romero, Jaime; Krogdahl, Åshild; Olsen, Rolf Erik; Dimitroglou, Arkadios; Foey, Andrew David; Davies, Simon; Owen, Matthew A.G.; Lauzon, Hélène Liette; Martinsen, Lisbeth Løvmo; De Schryver, Peter; Bossier, Peter; Sperstad, Sigmund; Merrifield, Daniel Lee (Peer reviewed; Journal article, 2015)It is well known that healthy gut microbiota is essential to promote host health and well-being. The intestinal microbiota of endothermic animals as well as fish are classified as autochthonous or indigenous, when they are ... -
Effect of different dietary arachidonic, eicosapentaenoic, and docosahexaenoic acid content on selected immune parameters in gilthead sea bream (Sparus aurata)
Magalhaes, R.; Guardiola, F.A.; Guerreiro, I.; Fontinha, F; Moutinho, Sandra; Olsen, Rolf Erik; Peres, H.; Oliva-Teles, A. (Peer reviewed; Journal article, 2021)The increasing replacement of fish oil (FO) by vegetable oils (VO) in aquafeeds for marine carnivorous species may lead to modifications of the dietary arachidonic (ARA), eicosapentaenoic (EPA) and docosahexaenoic (DHA) ... -
Effect of high dietary ARA and EPA on intestinal health of Atlantic salmon (Salmo salar) before and after chronic stress
Nordvi, Malene Fosse (Master thesis, 2020)Redusert bruk av marine fettsyrer i fiskefôr har ført til en høyere n-6/n-3 fettsyresammensetning i vev og organer til Atlantisk laks (Salmo salar). Siden langkjedede flerumettede fettsyrer (LC-PUFA) har sentrale roller i ... -
Effect of temperature on the metabolism, behaviourand oxygen requirements of Sparus aurata
Remen, Mette; Olsen, Rolf Erik; Oppedal, Frode; Thorsheim, Grethe Beate; Folkedal, Ole; Sitjà-Bobadilla, Ariadna; Pérez-Sánchez, Jaume; Nederlof, Marit A. J. (Journal article; Peer reviewed, 2015)We investigated the effect of temperature on the limiting oxygen saturation (LOS) of gilthead sea bream Sparus aurata. This threshold was defined as the % O2 saturation where fish no longer upheld their routine metabolic ... -
Effects of dietary glutamate and succinate on growth performance and mitochondrial respiration in heart and liver of Atlantic salmon (Salmo salar) smolts
Naveenan, Manoharan; Olsen, Rolf Erik; Egelandsdal, Bjørg (Journal article; Peer reviewed, 2019)The smolt stage of salmon has challenges in reaching adequate growth rates due to the changing environmental conditions at sea. Therefore, it is necessary to provide adequate diets to achieve sufficient growth. This study ... -
Effects of different dietary ingredients on the immune responses and antioxidant status in Atlantic salmon (Salmo salar L.): possible nutriomics approaches
Jalili, Mahsa (Doctoral theses at NTNU;2020:123, Doctoral thesis, 2020)The importance of salmon feeds Farming of Atlantic salmon (Salmo salar L.) is a first-rank aquaculture industry in Norway, accounting for a production of over 1.2 million tons per year. Dependency on fish meal has been ... -
Effects of elevated water temperatures and microalgae diet on prosome size, fat sac development, egg production and hatching success in Calanus finmarchicus.
Sæther, Simen (Master thesis, 2021)Raudåta (Calanus finmarchicus, Gunnerus) er en nøkkelart i Barents- og Norskehavet på grunn av sin tallrikhet og betydning knyttet til energioverføring mellom primærprodusenter og kommersielle fiskearter. Slik som mange ... -
The effects of fish meal replacement with ultra-micro ground mixed plant proteins (uPP) in practical diet on growth, gut and liver health of common carp (Cyprinus carpio)
Xie, Mingxu; Xie, Yadong; Li, Yu; Zhou, Wei; Yang, Yalin; Olsen, Rolf Erik; Ran, Chao; Zhou, Zhigang (Peer reviewed; Journal article, 2020)Plant proteins are widely used for fish meal replacement in aquafeeds, but anti-nutritional factors in plant protein reduce fish growth performance and impair fish health. The present work aimed to study the effects of ... -
Effects of photoperiod and melatonin implants on feed intake in Atlantic salmon (Salmo salar L.) postsmolts
Maiolo, Silvia; Hansen, Tom Johnny; Parisi, Giuliana; Olsen, Rolf Erik (Peer reviewed; Journal article, 2015)High melatonin concentrations were expected to negatively affect Atlantic salmon appetite. Hence, individually kept Atlantic salmon postsmolts were subjected to continuous light (24:0, L:L) or natural daylight ... -
Effects of salmon lice (Lepeophtheirus salmonis) on wild caught sea trout (Salmo trutta) under experimental conditions
Ambjørndalen, Vegard Masteholtet (Master thesis, 2017)An increasing net cage farming of salmonids in Norway are leading to increased production of infective salmon louse (Lepeophtheirus salmonis) larvae in coastal areas. One of the most vulnerable salmonids for salmon lice ... -
Effects on growth and gut health in Atlantic salmon (Salmo salar) fed diets containing the macroalgae Porphyra amplissima
Cheung, Christian Baohua (Master thesis, 2021)Morfologiske endringer og betennelse i fordøyelsessystemet til Atlanterhavslaks (Salmo salar) i akvakultur har blitt knyttet til den globale tendensen til å øke andelen plantebaserte ingredienser i fiskefôr. Tidligere ... -
En kartlegging av status for tarmslyng i oppdrettstorsk (Gadus morhua)
Fredriksen, Bendik (Master thesis, 2024)Et tiår etter at forrige «bølge» med torskeoppdrett kollapset, har det igjen oppstått en økende interesse knyttet til oppdrett av torsk i Norge. Dødeligheten hos oppdrettstorsk har generelt vært noe lavere sammenlignet med ... -
Endogenous production of n-3 long-chain PUFA from first feeding and the influence of dietary linoleic acid and the α-linolenic:linoleic ratio in Atlantic salmon (Salmo salar)
Sprague, Matthew; Xu, Gong; Betancor, Monica B; Olsen, Rolf Erik; Torrissen, Ole; Glencross, Brett D.; Tocher, Douglas R. (Journal article; Peer reviewed, 2019)Atlantic salmon (Salmo salar) possess enzymes required for the endogenous biosynthesis of n-3 long-chain PUFA (LC-PUFA), EPA and DHA, from α-linolenic acid (ALA). Linoleic acid (LA) competes with ALA for LC-PUFA biosynthesis ... -
Evaluering av proteinskimmer i RAS Effekt ved implementering av proteinskimmer på turbiditet og fiskehelse og - velferd
Strøm, Ruben; Folden, Eline Moen (Bachelor thesis, 2023)Resirkulerende akvakultursystemer (RAS) har økt i popularitet som en bærekraftig og effektiv metode for oppdrett av fisk. Dette er lukkede systemer hvor vannet kontinuerlig blir resirkulert gjennom ulike vannbehandlingskomponenter ... -
Excess DHA Induces Liver Injury via Lipid Peroxidation and Gut Microbiota-Derived Lipopolysaccharide in Zebrafish
Ding, Qianwen; Hao, Qiang; Zhang, Qingshuang; Yang, Yalin; Olsen, Rolf Erik; Ringø, Einar; Ran, Chao; Zhang, Zhen; Zhou, Zhigang (Journal article; Peer reviewed, 2022)