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dc.contributor.authorSamuelsen, Tor Andreas
dc.contributor.authorOterhals, Åge
dc.contributor.authorKousoulaki, Katerina
dc.date.accessioned2017-12-13T12:53:43Z
dc.date.available2017-12-13T12:53:43Z
dc.date.created2017-12-12T12:53:40Z
dc.date.issued2018
dc.identifier.citationAnimal Feed Science and Technology. 2018, 236 14-28.nb_NO
dc.identifier.issn0377-8401
dc.identifier.urihttp://hdl.handle.net/11250/2471195
dc.description.abstractThe aim of this research was to investigate effects on the extrusion process and physical pellet quality of high lipid microalgae (HL-microalgae) inclusion level as a source of n-3 long-chain polyunsaturated fatty acids (n-3 LC-PUFA) in fish feed. The experiment was based on a 3-component mixture design on commercially relevant feed blends by varying the content of dried HL-microalgae Schizochytrium sp. meal, vital wheat gluten (WG), and soy protein concentrate (SPC). Mixture models with R2 in the range of 0.881–0.998 (P < 0.01) were established for specific mechanical energy (SME), feed melt viscosity and temperature behind die, expansion parameters, and pellet hardness and durability. The mixture components affected SME, melt viscosity and viscous heat dissipation with the highest values observed for SPC followed by WG, and lowest for HL-microalgae rich blends. Increase in viscous heat dissipation and feed melt temperature increased the steam flashing rate and consequently pellet expansion and fat adsorption capacity. Lowest pellet hardness and durability were found for blends high in HL-microalgae or SPC level due to incomplete cooking. HL-microalgae addition up to 132 g/kg DM in SPC rich blends gave favourable processing effects with respect to improved plasticisation and physical pellet quality. This study documents that HL-microalgae has a potential to be used as an alternative and sustainable source of n-3 LC-PUFA in aquaculture feeds without compromising physical pellet attributes.
dc.language.isoengnb_NO
dc.titleHigh lipid microalgae (Schizochytrium sp.) inclusion as a sustainable source of n-3 long-chain PUFA in fish feed — Effects on the extrusion process and physical pellet qualitynb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionsubmittedVersion
dc.source.pagenumber14-28nb_NO
dc.source.volume236nb_NO
dc.source.journalAnimal Feed Science and Technologynb_NO
dc.identifier.doi10.1016/j.anifeedsci.2017.11.020
dc.identifier.cristin1526262
dc.relation.projectNofima AS: 10793nb_NO
dc.relation.projectNorges forskningsråd: 234057nb_NO
cristin.unitcode7543,1,3,0
cristin.unitnameErnæring og fôrteknologi
cristin.ispublishedtrue
cristin.fulltextpreprint
cristin.qualitycode1


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