Fishmeal substitution by Iberian pig meal and vegetable proteins blend and inclusion of Isochrysis aff. galbana (T‐Iso) in diets for gilthead seabream ( Sparus aurata L.): Effects on growth and feed utilization efficiency

Research was carried out into the effect of partial and total fishmeal (FM) replacement by a vegetable animal proteins blend, as well inclusion microalgae in diets for gilthead seabream (Sparus aurata L.). Fish 64 g on initial weight were fed until apparent satiation 88 days. The control diet (FM100) contained FM main protein source, whilst FM25, FM10 FM0 diets, replaced 75%, 90% 100%, respectively, blend consisting Iberian pig meal (IPM) meals. FM0+ similar to but included 50 g/kg Isochrysis aff. galbana (T-Iso). Results obtained final bodyweight specific growth rate indicate that FM25 FM100 achieved performances. An improvement performance nutrient utilization observed with respect diet. highest retention efficiencies protein, energy essential amino acids found diets. In conclusion, up 75% substitution on-growing is feasible, addition, (T-Iso) improves non-FM