Verge-Mèrida, G.Barroeta, A.C.Ferrer, CarlosSerrano, TàniaGuardiola Ibarz, FrancescSoler, María DoloresSala, Roser2023-01-122023-01-122022-05-062076-2615https://hdl.handle.net/2445/192124The effects of dietary inclusion of soybean-sunflower and olive pomace acid oils on growth, digestibility and flesh composition were studied in European seabass. Eight diets were fed for 100 days (101.37 ± 0.33 g initial weight, mean ± SD), differing in the added fat source (25% fish oil, 75% experimental oil): S (crude soybean oil), SA (soybean-sunflower acid oil), O (crude olive pomace oil) or OA (olive pomace acid oil); 3 blends: S-O, S-OA, SA-OA at a 1:1 ratio; and a diet containing only fish oil (F) as a control. Animals fed OA showed the worst performance among dietary treatments, with the lowest weight, specific growth ratio, average daily gain and the highest feed conversion ratio (p < 0.01). In contrast, other diets including acid oils did not impair performance. Acid oil diets did not affect the apparent digestibility of dry matter, crude protein or total fatty acids (p > 0.05), but a lower digestibility of lipids and saturated fatty acids was observed (p < 0.001). Flesh composition and fatty acid profile were not affected by the high dietary free FA content (p > 0.05). Hence the results suggest that the studied acid oils may potentially be used in fish diets although further studies are needed. Keywords: acid oil; alternative energy source; dietary fat; fat by-product; fish nutrition; flesh quality; free fatty acid.application/pdfengcc-by (c) Verge-Mèrida, G. et al., 2022https://creativecommons.org/licenses/by/4.0/Olis i greixosÀcids grassosDigestióOils and fatsFatty acidsDigestioninfo:eu-repo/semantics/article7239262023-01-12info:eu-repo/semantics/openAccess