Spicing up aquafeeds

A good experimental design is the key to ensuring that the trials provide sufficient information to be able to analyze the results from a broad perspective. IRTAmar® provides the necessary versatility so that the design adapts to the needs of researchers. This work is a collaborative example between LUCTA, S.A. and IRTA to develop a new strategy to reduce the inclusion of oil in seabream diets: “Spicing up aquafeeds: A novel strategy to mitigate reduced fish oil dietary inclusion, showcased in seabream fed a low fish oil-high poultry oil diet”.

The 90-day feeding trial was carried out at the Institute of Agrifood Research and Technology (IRTA) in La Ràpita (Tarragona, Spain). After an acclimation period of 2 weeks, juveniles of gilthead seabream (initial body weight, BWi = 44.1 ± 4.2 g; mean ± standard deviation, SD) obtained from a commercial fish farm were randomly distributed in 12 tanks of 450 L (30 fish per tank; initial density = 3 kg m−3; N = 360). To guarantee water quality maintenance, tanks were connected to an IRTAmar™ water recirculation system, following the natural photoperiod (June to August at 40.63N–0.66E). Water temperature, dissolved oxygen, and pH were kept at 22.5 ± 0.5°C, 6.3 ± 0.2 mg/L (OXI330, Crison Instruments, Barcelona, Spain) and 7.6 ± 0.01 (pH meter 507, Crison Instruments), respectively. Salinity, nitrite, and ammonia levels were 36‰ (MASTER-20 T Hand-Held Refractometer, ATAGO Co. Ltd., Italy), 0.16 ± 0.1 mg NO2/L, and 0.22 ± 0.08 mg NH4+/L (HACH DR 900 Colorimeter, Hach Company, Spain), respectively.



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