Search Results - "Stefansson, Sigurd"

The effect of temperature and fish size on growth, feed intake, food conversion efficiency and stomach evacuation rate of Atlantic salmon post-smolts by Handeland, Sigurd O., Imsland, Albert K., Stefansson, Sigurd O.

“…The present paper describes the growth properties of Atlantic salmon ( Salmo salar) post-smolts reared at 6, 10, 14 and 18 °C for 12 weeks following transfer…”
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Triploid atlantic salmon (Salmo salar L.) post-smolts accumulate prevalence more slowly than diploid salmon following bath challenge with salmonid alphavirus subtype 3 by Moore, Lindsey J, Nilsen, Tom Ole, Jarungsriapisit, Jiraporn, Fjelldal, Per Gunnar, Stefansson, Sigurd O, Taranger, Geir Lasse, Patel, Sonal

“…Triploid Atlantic salmon (Salmo salar L.) may play an important role in the sustainable expansion of the Norwegian aquaculture industry. Therefore, the…”
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Environmental endocrinology of salmon smoltification by Björnsson, Björn Thrandur, Stefansson, Sigurd O, McCormick, Stephen D

“…Abstract Smolting is a hormone-driven developmental process that is adaptive for downstream migration and ocean survival and growth in anadromous salmonids…”
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Differential expression of gill Na+,K+-ATPase alpha- and beta-subunits, Na+,K+,2Cl- cotransporter and CFTR anion channel in juvenile anadromous and landlocked Atlantic salmon Salmo salar by Nilsen, Tom O, Ebbesson, Lars O E, Madsen, Steffen S, McCormick, Stephen D, Andersson, Eva, Björnsson, Björn Th, Prunet, Patrick, Stefansson, Sigurd O

“…This study examines changes in gill Na(+),K(+)-ATPase (NKA) alpha- and beta-subunit isoforms, Na(+),K(+),2Cl(-) cotransporter (NKCC) and cystic fibrosis…”
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Leptin and leptin receptor genes in Atlantic salmon: Cloning, phylogeny, tissue distribution and expression correlated to long-term feeding status by Rønnestad, Ivar, Nilsen, Tom Ole, Murashita, Koji, Angotzi, Anna Rita, Gamst Moen, Anne-Grethe, Stefansson, Sigurd O, Kling, Peter, Thrandur Björnsson, Björn, Kurokawa, Tadahide

“…Abstract The present study reports the complete coding sequences for two paralogues for leptin (sLepA1 and sLepA2) and leptin receptor (sLepR) in Atlantic…”
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Correction: Triploid atlantic salmon (Salmo salar L.) post-smolts accumulate prevalence more slowly than diploid salmon following bath challenge with salmonid alphavirus subtype 3 by Moore, Lindsey J, Nilsen, Tom Ole, Jarungsriapisit, Jiraporn, Fjelldal, Per Gunnar, Stefansson, Sigurd O, Taranger, Geir Lasse, Patel, Sonal

“…[This corrects the article DOI: 10.1371/journal.pone.0175468.]…”
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Impact of fish density and specific water flow on skin properties in Atlantic salmon (Salmo salar L.) post-smolts by Sveen, Lene Rydal, Timmerhaus, Gerrit, Torgersen, Jacob Seilø, Ytteborg, Elisabeth, Jørgensen, Sven Martin, Handeland, Sigurd, Stefansson, Sigurd O., Nilsen, Tom Ole, Calabrese, Sara, Ebbesson, Lars, Terjesen, Bendik Fyhn, Takle, Harald

“…Prolonged production of Atlantic salmon (Salmo salar) post-smolts in closed-containment systems has prompted research into biological requirements under higher…”
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Identification of a novel leptin receptor duplicate in Atlantic salmon: expression analyses in different life stages and in response to feeding status by Angotzi, Anna R, Stefansson, Sigurd, Nilsen, Tom O, Øvrebø, Jan. I, Andersson, Eva, Taranger, Geir L, Rønnestad, Ivar

“…Highlights • A novel leptin receptor duplicate gene in Atlantic salmon (LepRA2 ) is identified. • LepRA1 and LepRA2 show similar electrostatic properties and…”
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Isolation and characterization of melanopsin photoreceptors of atlantic salmon (Salmo salar) by Sandbakken, Mari, Ebbesson, Lars, Stefansson, Sigurd, Helvik, Jon Vidar

“…Melanopsins constitute a recently described group of vertebrate opsin photoreceptors that are involved in nonvisual photoreception. Here we describe the…”
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Molecular cloning and genomic characterization of novel Leptin-like genes in salmonids provide new insight into the evolution of the Leptin gene family by Angotzi, Anna R, Stefansson, Sigurd O, Nilsen, Tom O, Rathore, Raja M, Rønnestad, Ivar

“…Highlights • We identify novel leptin B duplicated genes in four salmonid species. • We reconstruct phylogenetic relationships among leptin genes. • We examine…”
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Characterization, tissue distribution, and regulation of agouti-related protein (AgRP), cocaine- and amphetamine-regulated transcript (CART) and neuropeptide Y (NPY) in Atlantic salmon ( Salmo salar ) by Murashita, Koji, Kurokawa, Tadahide, Ebbesson, Lars O.E, Stefansson, Sigurd O, Rønnestad, Ivar

“…Abstract Key peptide hormones involved in the control of appetite in vertebrates were identified, their genes characterized and their regulation studied in…”
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A homologous salmonid leptin radioimmunoassay indicates elevated plasma leptin levels during fasting of rainbow trout by Kling, Peter, Rønnestad, Ivar, Stefansson, Sigurd O, Murashita, Koji, Kurokawa, Tadahide, Björnsson, Björn Thrandur

“…Abstract The present study was conducted to establish a homologous radioimmunoassay (RIA) for quantifying plasma leptin (Lep) levels in salmonid species, and…”
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Roles of leptin and ghrelin in adipogenesis and lipid metabolism of rainbow trout adipocytes in vitro by Salmerón, Cristina, Johansson, Marcus, Asaad, Maryam, Angotzi, Anna R., Rønnestad, Ivar, Stefansson, Sigurd O., Jönsson, Elisabeth, Björnsson, Björn Thrandur, Gutiérrez, Joaquim, Navarro, Isabel, Capilla, Encarnación

“…Leptin and ghrelin are important regulators of energy homeostasis in mammals, whereas their physiological roles in fish have not been fully elucidated. In the…”
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The use of photoperiods to provide year round spawning in lumpfish Cyclopterus lumpus by Imsland, Albert K., Hangstad, Thor Arne, Jonassen, Thor Magne, Stefansson, Sigurd O., Nilsen, Tom Ole, Hovgaard, Peter, Elvegård, Tor Anders, Lindberg, Ken Ståle, Mikalsen, Bjørn, Urskog, Tonje Cecilie, Norberg, Birgitta, Andersson, Eva, Spetland, Frank, Reynolds, Patrick

“…In order to provide year round spawning broodstock, lumpfish (initial size 746 g and 24.9 cm) were reared under four different photoperiod regimes from January…”
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Flesh quality of Atlantic salmon smolts reared at different temperatures and photoperiods by Imsland, Albert K. D., Roth, Bjorn, Døskeland, Inge, Fjelldal, Per Gunnar, Stefansson, Sigurd O., Handeland, Sigurd, Mikalsen, Bjørn

“…Possible interactive effects of temperature and photoperiod on flesh quality in Atlantic salmon post‐smolts were studied. Juvenile (initial mean weight…”
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Effects of chronic and periodic exposure to ammonia on growth and blood physiology in juvenile turbot ( Scophthalmus maximus) by Foss, Atle, Imsland, Albert K., Roth, Bjørn, Schram, Edward, Stefansson, Sigurd O.

“…Juvenile turbot ( Scophthalmus maximus) were exposed periodically and chronically to different levels of un-ionised ammonia (UIA-N) and the subsequent effect…”
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The role of growth hormone in growth, lipid homeostasis, energy utilization and partitioning in rainbow trout: Interactions with leptin, ghrelin and insulin-like growth factor I by Kling, Peter, Jönsson, Elisabeth, Nilsen, Tom Ole, Einarsdottir, Ingibjörg Eir, Rønnestad, Ivar, Stefansson, Sigurd O, Björnsson, Björn Thrandur

“…Highlights ► GH treatment leads to in tissue-specific redistribution of energy stores. ► GH treatment decreases lipid content in mesentery, white muscle and…”
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Relationship between viral dose and outcome of infection in Atlantic salmon, Salmo salar L., post-smolts bath-challenged with salmonid alphavirus subtype 3 by Jarungsriapisit, Jiraporn, Moore, Lindsey J, Mæhle, Stig, Skår, Cecilie, Einen, Ann Cathrine, Fiksdal, Ingrid Uglenes, Morton, Hugh Craig, Stefansson, Sigurd O, Taranger, Geir Lasse, Patel, Sonal

“…Salmonid alphavirus subtype 3 (SAV3) causes pancreas disease (PD) and adversely affects salmonid aquaculture in Europe. A better understanding of disease…”
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Water Flow Requirements of Post-smolt Atlantic Salmon (Salmo salar L.) Reared in Intensive Seawater Flow-through Systems: A Physiological Perspective by Calabrese, Sara, Imsland, Albert K. D., Nilsen, Tom Ole, Kolarevic, Jelena, Ebbesson, Lars O. E., Hosfeld, Camilla Diesen, Fivelstad, Sveinung, Pedrosa, Cindy, Terjesen, Bendik Fyhn, Stefansson, Sigurd O., Takle, Harald, Sveier, Harald, Mathisen, Frode, Handeland, Sigurd O.

“…Environmental challenges related to open sea cage production of Atlantic salmon have sparked interest in developing commercial-scale semi-closed sea systems…”
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Growth, osmoregulation and endocrine changes in wild Atlantic salmon smolts and post-smolts during marine migration by Stefansson, Sigurd O., Haugland, Monika, Björnsson, Björn Thrandur, McCormick, Stephen D., Holm, Marianne, Ebbesson, Lars O.E., Holst, Jens Chr, Nilsen, Tom O.

“…We have examined physiological parameters associated with seawater adaptability, growth and energetics, as well as major endocrine regulators of these…”
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