Alternative formulations for gilthead seabream

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A study led by the Center of Marine Sciences of Algarve (Faro, Portugal) tested alternative diet formulations for gilthead seabream production, with low levels of fishmeal inclusion and using non-conventional feed ingredients of animal and plant origin that are not used directly for human consumption.

The present study showed that the plant by‐products, glutens and concentrates (PLANT) and processed animal proteins (PAP) treatments resulted in better fish growth performance, higher nutrient and energy retentions, and lower FCR than the control treatment. However, in the EMERG treatment, in which the fish were fed a diet with micro / macroalgae, insect flours and yeasts in the treatment, they resulted in lower fish growth performance, higher FCR and less nutrient and energy retention than other treatments. The significant improvement in FCR found for fish fed PLANT and PAP diets and the high protein digestibility of these diets contribute towards minimizing the environmental impacts of seabream production.

SPAROS manufactured all experimental diets used in this trial.

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This study was supported by the Portuguese Foundation for Science and Technology (Ministry of Science and Higher Education, Portugal and European Social Funds) through projects UID/Multi/04326/2019 to CCMAR, PTDC/MAR‐BIO/3034/2014 to JF and contract DL57/2016/CP1361/CT0033 to CA.

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