Blar i forfatter "Vang, Birthe"

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    • Farmed Atlantic cod (Gadus morhua L.). Comparative studies on fillets produced pre-and post-rigor and on the drip lost during ice storage. 

      Vang, Birthe (Master thesis; Mastergradsoppgave, 2007-09-28)
      Atlantic cod (Gadus morhua L.) is a promising and relatively new species in Norwegian fish farming. Benefits of cod farming includes stable deliveries of fresh cod all year round, and that the supply of a growing marked can be met without depletion of the cod stocks. Improved slaughter procedures by live chilling and reduction of ante mortem stress, give the opportunity to process the fish pre-rigor, ...

    • Fatty acid profile of cooked leg meat and raw hepatopancreas of red king crab (Paralithodes camtschaticus) during three-month live holding without feeding at 5 and 10 °C 

      Lian, Federico; Siikavuopio, Sten Ivar; Harrison, Sabine M.; Vang, Birthe; Brunton, Nigel P.; Esaiassen, Margrethe; Lorentzen, Grete Elisabeth (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-06)
      The red king crab (RKC, Paralithodes camtschaticus) is a highly-valued decapod species. Typically, RKCs undergo a period of live holding (LH), often without feeding, in onshore facilities, allowing for flexible management before export to destination markets. This study aimed to (i) gain information on the fatty acid (FA) profile of the cooked leg meat and raw hepatopancreas obtained from RKC harvested ...

    • First observation of seasonal variations in the meat and co-products of the snow crab (Chionoecetes opilio) in the Barents Sea 

      Solstad, Runar Gjerp; Descomps, Alexandre; Siikavuopio, Sten Ivar; Karstad, Rasmus Tørnes; Vang, Birthe; Whitaker, Ragnhild Dragøy (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-24)
      The snow crab (<i>Chionoecetes opilio</i>), SC, is a newly established species in the Barents Sea. The snow crab fishery has established itself as a new and profitable industry in Norway in the last decade. The fishery started as a year-round fishery, without any information of possible seasonal variations in the quality of the product. In 2017 a total allowable catch was established by the Norwegian ...

    • Inclusion of photoautotrophic cultivated diatom biomass in salmon feed can deter lice 

      Eilertsen, Hans Christian; Elvevoll, Edel O.; Giæver, Ingeborg Hulda; Svenning, Jon Brage; Dalheim, Lars; Svalheim, Ragnhild Aven; Vang, Birthe; Siikavuopio, Sten Ivar; Dragøy, Ragnhild; Ingebrigtsen, Richard Andre; Hansen, Espen Holst; Hustad, Anette; Eilertsen, Karl-Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-29)
      The aim of this study was to evaluate the potential of diatom (microalgae) biomass as a lice-reducing ingredient in salmon feed. The original hypothesis was based on the fact that polyunsaturated aldehydes (PUAs), e.g. 2-trans, 4-trans decadenial (A3) produced by diatoms can function as grazing deterrents and harm copepod development. Salmon lice (Lepeophtheirus salmonis) is a copepod, and we intended ...

    • Lipid yield from the diatom Porosira glacialis is determined by solvent choice and number of extractions, independent of cell disruption 

      Svenning, Jon Brage; Dalheim, Lars; Vasskog, Terje; Vang, Birthe; Matricon, Lucie; Olsen, Ragnar Ludvig (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-17)
      Cell wall disruption is necessary to maximize lipid extraction yields in conventional species of mass-cultivated microalgae. This study investigated the effect of sonication, solvent choice and number of extractions on the lipid yield, lipid class composition and fatty acid composition of the diatom <i>Porosira glacialis</i>. For comparison, the diatom <i>Odontella aurita</i> and green alga <i>Chlorella ...

    • Mikroalger i fôr, ny løsning for å redusere lusepåslag på laks – Faglig sluttrapport 

      Hustad, Anette; Vang, Birthe; Eilertsen, Hans Christian; Siikavuopio, Sten Ivar; Sæther, Bjørn-Steinar; Svalheim, Ragnhild Aven; Hansen, Espen Holst; Svenning, Jon Brage; Kousoulaki, Katerina; Whitaker, Ragnhild (Research report; Forskningsrapport, 2020-05)
      I dette prosjektet har vi testet ut en hypotese om at ved å erstatte vegetabilske oljer i fôr til oppdrettslaks med marine oljer, vil man kunne redusere lusepåslag hos laks. Vi har fôret laks med fire ulike fôr, der proteininnholdet er det samme, men oljen er variert. De ulike fôrene vi brukte var kontrollfôr som var standardfôr med vegetabilsk olje, og tre ulike testfôr der vegetabilsk olje ble ...

    • Recovery and properties of oil from the copepod Calanus finmarchicus 

      Vang, Birthe (Doctoral thesis; Doktorgradsavhandling, 2016-01-29)
      The limited amount of fish oils available has led to extensive search for alternative sources of oils rich in health beneficial long-chain polyunsaturated ω-3 fatty acids. The zooplankton Calanus finmarchicus, also known as redfeed, is present in large amounts in the North Atlantic and has lipid-rich stages, which can be harvested. One of the main objectives of this study was to investigate if the ...