Effect of dietary inclusion of dried Tetraselmis suecica on growth, feed utilisation and fillet composition of European sea bass juveniles

Dried Tetraselmis suecica was evaluated as fish protein substitute when 13 incorporated to replace (protein basis) 10% (TETRA10) and 20% (TETRA20) of 14 the control diet. The diets were offered to 9 groups of European seabass (72g) over 15 63 days. Test diets did not affect zootechnical performances nor carcass or fillet 16 yields and proximate analysis of edible portion. Feeding TETRA20 resulted in 17 lower apparent digestibility coefficients of protein, lipid and organic matter and 18 hepatosomatic index compared to the control diet. T. suecica resulted able to replace 19 up to 20% of fish protein without hampering growth performance and major quality 20 traits of seabass.