Fig. 5. (A) Percentage inhibition of calcium uptake in juvenile rainbow trout exposed to control conditions (black bar) or 1 µmol l^-1 lanthanum, 1 µmol l^-1 cadmium or 100 µmol l^-1 zinc (white bars) in synthetically modified water (600 µmol l^-1 Ca²⁺). (B-D) Branchial lead accumulation in juvenile rainbow trout exposed to control conditions (black circles) or (B) a series of waterborne lanthanum concentrations, (C) a series of waterborne cadmium concentrations, and (D) a series of waterborne zinc concentrations. Values are means ± 1 S.E.M. (N=7 per treatment). ^*Significant difference (P<0.05; two-tailed Student's t-test) from corresponding control mean.