Fig. 1. (A) Effects on growth of exposure of juvenile rainbow trout to a combination of waterborne and dietary Cu levels ranging from deficient to excess. Values are cumulative mass gain per tank (means ± S.E.M., N=3). Diamonds, low waterborne Cu and low dietary Cu; triangles, low waterborne Cu and normal dietary Cu; open circles, normal waterborne Cu and low dietary Cu; filled circles, normal waterborne Cu and normal dietary Cu; squares, normal waterborne Cu and high dietary Cu level. (B) Effects of the exposure conditions on food conversion efficiency in actively growing rainbow trout. Values are means ± S.E.M. on a per tank basis, N=3 per data point. LL, low waterborne Cu and low dietary Cu; LN, low waterborne Cu and normal dietary Cu; NL, normal waterborne Cu and low dietary Cu; NN, normal waterborne Cu and normal dietary Cu; NH, normal waterborne Cu and high dietary Cu level. *Significant difference relative to group NN on normal water Cu and normal dietary Cu (ANOVA, P<0.05). No significant differences were observed with other comparisons of treatments.