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Fig. 8. Daily ration, measured on a per tank basis and expressed on a % body mass per day basis [(g food g^–1 fish)x100] over 71 days in three experimental treatments of Series 2: nominal [T_Amm]=0 µmol l^–1 (control, N=4 tanks), 70 µmol l^–1 (low ammonia, N=4 tanks) and 225 µmol l^–1 (high ammonia, N=3 tanks). Values are means ±1 S.E.M. Data for satiation-fed fish represent voluntary food consumption. Values for the high ammonia treatment group tended to be lower than the controls late in the exposure, but overall there were no statistically significant differences. Data for rationed fish reflect the fact that these fish were fed a fixed ration of 2% of their body mass per day, not all of which was consumed. Again, there were no significant differences overall.

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