Blar i NOFIMA vitenarkiv på forfatter "Rønnestad, Ivar"
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1H NMR metabolic profiling of cod (Gadus morhua) larvae: potential effects of temperature and diet composition during early developmental stages
Chauton, Matilde Skogen; Galloway, Trine Falck; Kjørsvik, Elin; Størseth, Trond Røvik; Puvanendran, Velmurugu; van der Meeren, Terje; Karlsen, Ørjan; Rønnestad, Ivar; Hamre, Kristin (Journal article, 2015)Marine aquaculture offers a great source of protein for the increasing human population, and farming of, for example, Atlantic salmon is a global industry. Atlantic cod farming however, is an example of a promising industry ... -
Assessing microplastic as a vector for chemical entry into fish larvae using a novel tube-feeding approach
Norland, Sissel; Vorkamp, Katrin; Bogevik, André Sture; Koelmans, Albert A.; Diepens, Noël J.; Burgerhout, Erik; Hansen, Øyvind Jul; Puvanendran, Velmurugu; Rønnestad, Ivar (Peer reviewed; Journal article, 2020) -
Choline supplementation increased total body lipid gain, while surplus methionine improved growth and amino acid retention in adult Atlantic salmon (Salmo salar)
Espe, Marit; Andersen, Synne Marte; Veiseth-Kent, Eva; Rønnestad, Ivar; Holen, Elisabeth; Zerrahn, Jens-Erik; Aksnes, Anders (Peer reviewed; Journal article, 2017)Methionine–choline-deficient (MCD) mammals are known to accumulate liver TAG probably due to phosphatidylcholine (PC) deficiency and thus assembly of VLDL and transport of lipids from liver to peripheral organs. To assess ... -
Disintegration stability of extruded fish feed affects gastric functions in Atlantic salmon (Salmo salar)
Bogevik, André Sture; Samuelsen, Tor Andreas; Aspevik, Tone; Romarheim, Odd Helge; Aas, Turid Synnøve; Kalananthan, Tharmini; Rønnestad, Ivar (Peer reviewed; Journal article, 2021)In the present study, two salmon feeds with different disintegration stabilities were produced by impacting extruder viscous heat dissipation with the use of different lipid levels in the feed mix. The feeds were then dried ... -
Methionine deficiency does not increase polyamine turnover through depletion of hepatic S-adenosylmethionine in juvenile Atlantic salmon
Espe, Marit; Andersen, Synne Marte; Holen, Elisabeth; Rønnestad, Ivar; Veiseth-Kent, Eva; Zerrahn, Jens-Erik; Aksnes, Anders (Peer reviewed; Journal article, 2014) -
Ossification of Atlantic cod (Gadus morhua) – Developmental stages revisited
Sæle, Øystein; Haugen, Trine; Karlsen, Ørjan; van der Meeren, Terje; Bæverfjord, Grete; Hamre, Kristin; Rønnestad, Ivar; Moren, Mari; Lie, Kai Kristoffer (Journal article; Peer reviewed, 2017)In studies of marine larvae, it is common to use days post-hatch as a developmental reference point. We show that age is a poor measure of morphological and physiological development in Atlantic cod. Therefore, we propose ... -
PCB-126 spiked to polyethylene microplastic ingested by juvenile Atlantic cod (Gadus morhua) accumulates in liver and muscle tissues
Bogevik, André Sture; Ytteborg, Elisabeth; Madsen, Alexander Klevedal; Jordal, Ann-Elise Olderbakk; Karlsen, Odd Andre; Rønnestad, Ivar (Peer reviewed; Journal article, 2023)In the present study, polyethylene (PE) microplastics (150–300 μm) were added to Atlantic cod (Gadus morhua) feeds at 1 %, either in their present form (Virgin PE) or spiked with PCB-126 (Spiked PE). The feeds were given ... -
Physiological responses of Atlantic salmon (Salmo salar L.) fed very low (3%) fishmeal diets supplemented with feeding-modulating crystalline amino acid mixes as identified in krill hydrolysate
Kousoulaki, Katerina; Rønnestad, Ivar; Rathore, Raja Mansingh; Sixten, Hanne Jorun; Campbell, Paddy; Nordrum, Sigve; Berge, Rolf Kristian; Albrektsen, Sissel (Journal article; Peer reviewed, 2018)Crystalline amino acids and nucleotides, previously identified as potential feed-intake modulators in krill hydrolysate (KH), were mixed into low fish meal diets for Atlantic salmon in five combinations: A1) Arg, A2) Arg ...