Fig. 10. Protein production per individual fish (N=20 for control and low ammonia, N=15 for high ammonia) over 71 days in the three experimental treatments of Series 2: nominal [T_Amm]=0 µmol l^–1 (control), 70 µmol l^–1 (low ammonia) and 225 µmol l^–1 (high ammonia). (A) Satiation-fed fish, (B) rationed fish. Values are means ±1 S.E.M. *Significant difference from control within the same panel. Means for the same treatments were all significantly lower in the rationed fish than in the satiation-fed fish.