At the end of the trial, no differences in survival were detected among different experimental groups with values ranging from 98.8 to 99.2% (P N 0.05; Table 2). The inclusion of the immunostimulant in diets at both tested levels (10 and 20 μgLPSpkgBW
−1
day
)significantly promoted growth in SL
f
and BW
in comparison to the group fed the C diet (P b 0.001; Table 2), although growth performance was similar in fish fed 10 and 20 IS diets. The mean BW
f
f
and SL
in fish fed both IS diets were ca. 17.4 and 6.4% higher than in the control group. In this sense, statistically significant differences in SGR and FCR values were detected between experimental groups (P b 0.001, n =3;Table 2).
f
−1