Blar i Brage IMR på forfatter "Fjelldal, Per Gunnar"
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Dietary zinc, selenium and water temperature during early seawater phase influences the development of vertebral deformities and cataract in adult Atlantic salmon
Philip, Antony Jesu Prabhu; Fjelldal, Per Gunnar; Remø, Sofie C.; Silva, Marta Sofia; Holme, May-Helen; Lock, Erik Jan Robert; Waagbø, Rune (Peer reviewed; Journal article, 2023)The impact of dietary trace minerals (TM; zinc and selenium) and water temperature during early seawater phase on the development of vertebral deformities and cataracts in adult Atlantic salmon was studied. Two experimental ... -
The Distribution of IgT mRNA+ Cells in the Gut of the Atlantic Salmon (Salmo salar L.)
Castro, Pedro Luis; Barac, Fran; Hansen, Tom Johnny; Fjelldal, Per Gunnar; Hordvik, Ivar; Bjørgen, Håvard; Koppang, Erling Olaf (Peer reviewed; Journal article, 2023)The newly discovered IgT+ B cell is thought to play a dominant role in mucosal immunity, but limited studies have examined its distribution in fish species, hindering our understanding of its function. This study investigated ... -
Dive to survive: effects of capture depth on barotraumaand post-release survival of Atlantic cod (Gadus morhua)in recreational fisheries
Ferter, Keno; Weltersbach, Marc Simon; Humborstad, Odd Børre; Fjelldal, Per Gunnar; Sambraus, Florian; Strehlow, Harry Vincent; Vølstad, Jon Helge (Journal article; Peer reviewed, 2015-06-04)Atlantic cod (Gadus morhua) caught in recreational fisheries are commonly released, often with barotrauma after rapid decompression. Mouth-hooked, non-bleeding cod kept in a floating net pen showed mortalities ≥40% when ... -
DNA damage and health effects in juvenile haddock (Melanogrammus aeglefinus) exposed to PAHs associated with oil-polluted sediment or produced water
Meier, Sonnich; Karlsen, Ørjan; Le Goff, Jérémie; Sørensen, Lisbet; Sørhus, Elin; Pampanin, Daniela Maria; Donald, Carey E.; Fjelldal, Per Gunnar; Dunaevskaya, Evgenia; Romano, Marta; Caliani, Ilaria; Casini, Silvia; Bogevik, Andre S.; Olsvik, Pål Asgeir; Myers, Mark; Grøsvik, Bjørn Einar (Peer reviewed; Journal article, 2020)The research objective was to study the presence of DNA damages in haddock exposed to petrogenic or pyrogenic polyaromatic hydrocarbons (PAHs) from different sources: 1) extracts of oil produced water (PW), dominated by ... -
DNA damage and health effects in juvenile haddock exposed to sediment or produced water associated PAHs
Meier, Sonnich; Karlsen, Ørjan; Le Goff, Jeremie; Sørensen, Lisbet; Edvardsen, Rolf B.; Jentoft, Sissel; Skogland, Karianne; Fjelldal, Per Gunnar; Pampanin, Daniela; Dunaevskaya, Evgenia; Romano, Marta; Myers, Mark; Grøsvik, Bjørn Einar (Rapport fra Havforskningen;3-2017, Working paper, 2017)Tilstandsundersøkelsene i Nordsjøen har det siste tiår vist gentoksiske effekter (DNA-addukter) i fisk samlet inn i områder med offshore olje- og gassvirksomhet. Kilden og identiteten til de gentoksiske forbindelsene har ... -
Dyrevelferdsmessige konsekvenser av vaksinasjon av fisk - effekter og bivirkninger.
Berg, Arne; Bergh, Øivind; Fjelldal, Per Gunnar; Hansen, Tom; Juell, Jon-Erik; Nerland, Audun H. (Fisken og havet, Research report, 2006) -
Effects of laboratory salmon louse infection on mortality, growth, and sexual maturation in Atlantic salmon
Fjelldal, Per Gunnar; Fraser, Thomas; Hansen, Tom Johnny; Karlsen, Ørjan; Bui, Samantha (Peer reviewed; Journal article, 2022)Elevated salmon louse infection pressure generated by salmon farming represents a major threat for wild Atlantic salmon (Salmo salar). This study explored the effect of salmon lice on mortality, and body and gonad growth ... -
Effects of laboratory salmon louse infection on osmoregulation, growth and survival in Atlantic salmon
Fjelldal, Per Gunnar; Hansen, Tom Johnny; Karlsen, Ørjan (Peer reviewed; Journal article, 2020)Anadromous Atlantic salmon (Salmo salar) rely on long ocean migrations to build energy stores for maturation and spawning. In seawater, wild Atlantic salmon are threatened by high salmon lice (Lepeophtheirus salmonis) ... -
Effects of light source and intensity on sexual maturation, growth and swimming behaviour of Atlantic salmon in sea cages
Hansen, Tom Johnny; Fjelldal, Per Gunnar; Folkedal, Ole; Vågseth, Tone; Oppedal, Frode (Peer reviewed; Journal article, 2017) -
Effects of temperature and feeding regime on cortisol concentrations in scales of Atlantic salmon post-smolts
O'Toole, Christina; White, Philip; Thomas, Katie; O'Maoiléidigh, Niall; Fjelldal, Per Gunnar; Hansen, Tom Johnny; Graham, Conor T.; Brophy, Deirdre (Peer reviewed; Journal article, 2023)Anadromous fish are vulnerable to anthropogenic and environmental stressors including pollution, rising temperatures, and changes in food availability. Knowledge of how fish respond to specific stressors aid our understanding ... -
Effects of temperature on feed intake and plasma chemistry after exhaustive exercise in triploid brown trout (Salmo trutta L)
Preston, Andrew C.; Tylor, John F.; Fjelldal, Per Gunnar; Hansen, Tom Johnny; Migaud, Hevré (Journal article, 2016) -
Effects of vegetable feed ingredients on bone health in Atlantic salmon
Fjelldal, Per Gunnar; Nordgarden, Ulla; Wargelius, Anna; Taranger, Geir Lasse; Waagbø, Rune; Olsen, Rolf Erik (Journal article; Peer reviewed, 2010-04)The aim of the present study was to examine if dietary inclusion of vegetable lipids (VL) and proteins (VP) influenced markers of bone health in Atlantic salmon. Triplicate groups were fed one of four different diets; 100% ... -
Effekt på dyrevelferd av gjentatte termiske behandlinger med ulik Δt, ulik utgangstemperatur og ulik behandlingstemperatur
Stien, Lars Helge; Bui, Samantha; Nilsson, Jonatan; Madaro, Angelico; Fjelldal, Per Gunnar; Schrøder, Merete Bjørgan; Venås, Birger; Johansen, Malin; Seternes, Tore; Åkesson, Caroline Piercey; Wisløff, Helene; Brinchmann, Monica Fengsrud; Patel, Deepti Manjari; Iversen, Martin Haugmo (Rapport fra havforskningen;2022 - 39, Research report, 2022)Formålet med forsøkene i arbeidspakke 2 i TermVel-prosjektet var å avdekke effekt på dyrevelferd av gjentatt termisk behandling av laks gitt ulik utgangstemperatur, ulik behandlingstemperatur og ulik Δt (differanse mellom ... -
Elevated Water CO<inf>2</inf> Can Prevent Dietary-Induced Osteomalacia in Post-Smolt Atlantic Salmon (Salmo salar, L.)
Drábiková, Lucia; Fjelldal, Per Gunnar; Yousaf, Muhammad Naveed; Morken, Thea; De Clercq, Adelbert; McGurk, Charles; Witten, Paul Eckhard (Peer reviewed; Journal article, 2023)Expansion of land-based systems in fish farms elevate the content of metabolic carbon dioxide (CO2) in the water. High CO2 is suggested to increase the bone mineral content in Atlantic salmon (Salmo salar, L.). Conversely, ... -
Environmental and Genetic (vgll3) Effects on the Prevalence of Male Maturation Phenotypes in Domesticated Atlantic Salmon
Fraser, Thomas; Hansen, Tom Johnny; Fjelldal, Per Gunnar (Peer reviewed; Journal article, 2023)Pre-harvest male maturation is problematic for Atlantic salmon (Salmo salar) farmers and is regulated by the environment and genetics (e.g., vgll3). Five families of all-male salmon parr (produced using YY males crossed ... -
Epithelial Label-Retaining Cells Are Absent during Tooth Cycling in Salmo salar and Polypterus senegalus
Vandenplas, Sam; Willems, Maxime; Witten, P. Eckhard; Hansen, Tom Johnny; Fjelldal, Per Gunnar; Huysseune, Ann (Journal article; Peer reviewed, 2016-04-06)The Atlantic salmon (Salmo salar) and African bichir (Polypterus senegalus) are both actinopterygian fish species that continuously replace their teeth without the involvement of a successional dental lamina. Instead, they ... -
Evolutionary drivers of kype size in atlantic salmon (salmo salar): domestication, age and genetics
Perry, William; Solberg, Monica Favnebøe; Besnier, Francois; Dyrhovden, Lise; Matre, Ivar Helge; Fjelldal, Per Gunnar; Ayllon, Fernando; Creer, Simon; Llewellyn, Martin; Taylor, Martin I.; Carvalho, Gary; Glover, Kevin (Journal article; Peer reviewed, 2019)The diversity of reproduction and associated mating patterns in Atlantic salmon (Salmo salar) has long captivated evolutionary biologists. Salmo salar exhibit strategies involving migration, bold mating behaviours and ... -
Experimental transmission of piscine orthoreovirus-1 (PRV-1) in different life stages of Atlantic salmon (Salmo salar) and brown trout (Salmo trutta)
Kannimuthu, Dhamotharan; Roh, HyeongJin; Morton, Hugh Craig; Penaranda, Ma Michelle Demogina; Vossgård, Anne; Hansen, Tom Johnny; Fjelldal, Per Gunnar; Karlsbakk, Egil Erlingsson; Fiksdal, Ingrid Uglenes; Dahle, Maria; Berg-Rolness, Hakon Schau; Mæhle, Stig; Ghebretnsae, Dawit Berhe; Nordbø, Joachim; Patel, Sonal; Madhun, Abdullah Sami; Grove, Søren; Kvamme, Bjørn Olav (Peer reviewed; Journal article, 2023)Piscine orthoreovirus -1 (PRV-1) causes the disease heart and skeletal muscle inflammation (HSMI) in farmed Atlantic salmon, and the virus has been detected in wild anadromous Atlantic salmon and brown trout. However, the ... -
Flesh quality of Atlantic salmon smolts reared at different temperatures and photoperiods
Imsland, Albert; Roth, Bjørn; Døskeland, Inge; Fjelldal, Per Gunnar; Stefansson, Sigurd Olav; Handeland, Sigurd O; Mikalsen, Bjørn (Journal article; Peer reviewed, 2019)Possible interactive effects of temperature and photoperiod on flesh quality in Atlantic salmon post‐smolts were studied. Juvenile (initial mean weight 96.0 g ± 3.1 SEM) Atlantic salmon were reared at six different ... -
Full compensatory growth before harvest and no impact on fish welfare in Atlantic salmon after an 8-week fasting period
Hvas, Malthe; Nilsson, Jonatan; Vågseth, Tone; Nola, Velimir; Fjelldal, Per Gunnar; Hansen, Tom Johnny; Oppedal, Frode; Stien, Lars Helge; Folkedal, Ole (Peer reviewed; Journal article, 2021)Individually tagged Atlantic salmon postsmolts (≈1200 g, 46 cm) reared in triplicate indoor holding tanks were fasted for 8 weeks at 12 °C and subsequently refed for 5 weeks, whereafter they were transferred to triplicate ...