Fig. 5. Thiobarbituric acid reactive substances (TBARS) in gill (A), intestine (B) and liver (C) of rainbow trout fed a casein-based diet containing low (filled square), normal (filled diamond) and high (filled circle) levels of iron. Values are means ± S.E.M. (N=6). Other details and statistics as in Fig. 1. No statistical differences were observed between TBARS of initial fish and those on the normal-Fe diet at week 2. Insets are log[Fe] in tissue correlated with TBARS for intestine (B inset, y=0.33x+0.55, for all diets N=27) and liver (panel C insert, y=8.79x+1.72, for normal and high-Fe diets, N=18).