It can be stated out that the growth performance is influencing the
proximate body composition of the fishes (Table 3.1 and 5). The initial
proximate body compositions did not differ compared to diets with a
shortage (diet nos. 1 & 2) or a strong oversupply (diet nos. 8 & 9) of
Met + Cys, except the energy content in diet no. 8. Whereas fish fed
diets within or near by the lower and the upper critical concentration
of RG (Fig. 1; Table 3.2), showed significantly or in tendency different
values (Table 5).