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Appears in Collections:Aquaculture eTheses
Title: Assessing EPA + DHA requirements of Sparus aurata AND Dicentrarchus labrax: Impacts on growth, composition and lipid metabolism
Author(s): Houston, Sam James Silver
Supervisor(s): Monroig, Oscar
Keywords: Nutrient requirements
Long-chain polyunsaturated fatty acids
Non-linear modelling
eicosapentaenoic acid (EPA)
docosahexaenoic acid (DHA)
gilthead seabream
European seabass
Essential fatty acids
lipid metabolism
gene expression
marine fish
Issue Date: 12-Feb-2018
Publisher: University of Stirling
Citation: HOUSTON, S.J.S., KARALAZOS, V., TINSLEY, J., BETANCOR, M.B., MARTIN, S.A.M., TOCHER, D.R. and MONROIG, O., 2017. The compositional and metabolic responses of gilthead seabream (Sparus aurata) to a gradient of dietary fish oil and associated n-3 long-chain polyunsaturated fatty acid content. British Journal of Nutrition, 118(12), pp. 1010-1022.
Abstract: Abridged abstract: The gilthead seabream (Sparus aurata) and European seabass (Dicentrarchus labrax) require n-3 long-chain polyunsaturated fatty acids (LC-PUFA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), for optimal growth and health. Due to the rapid growth of global aquaculture the quantity of marine oils used in aquafeeds has been limited, yet the overall quantity of oil in an aquafeed has increased by the addition of vegetable oil (VO) to supply dietary energy. For aquaculture to continue to grow more fish must be produced with less marine ingredients, yet EPA and DHA must be maintained at levels above fish requirements. This project set out to re-evaluate the requirement for EPA and DHA in gilthead seabream and European seabass. Two dose-response studies were designed and executed where juvenile seabream and seabass were fed one of six levels of EPA+DHA (0.2 – 3.2 % as fed). Biometric data were collected and analysed to determine new requirement estimates for EPA+DHA for fish of two weight ranges (24 – 80 g and 80 – 200 g). The effects of the dietary LC-PUFA gradient on lipid composition and metabolism were also considered.
Type: Thesis or Dissertation

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