Feed efficiency of fish fed different diets is presented in Table 6. Feed intake (FI) of fish fed
different diets ranged from 31.87 to 39.80 g/fish. The substitution of fishmeal protein with 100 % FGAS
protein caused lower FI. Fish fed diets with 50 % fishmeal protein as either minced GAS or FGAS
protein showed higher FI than those of fish fed the control diet. However, there was no significant
difference in FI among treatments (p > 0.05).
Feed conversion ratio (FCR) ranged from 1.02 to 1.19. It was found that the optimal snail meal
substitution improved FCR. The results of fish fed the diet containing snail meal (diets 3, 4 and 6) showed
a significantly better FCR than fish fed the fishmeal diet (p < 0.05). While FCR of the 100 % snail meal
diet showed no significant difference with the control diet. For protein efficiency ratio (PER) and
productive protein value (PPV) of fish fed different diets, it was found that there were no significant
difference in PER and PPV among treatments (p > 0.05).