Fig. 1. In vivo ferric (Fe3+) and ferrous (Fe2+) iron uptake (filled columns) from the posterior region of the intestine of the European flounder and the influence of the iron chelator desferrioxamine (DFO; open columns) on this uptake rate. Values are means + S.E.M. (N=5–6). An asterisk indicates a significant difference between the control iron (Fe3+ or Fe2+) uptake rate and the uptake rate in the presence of DFO, and a double dagger indicates a significant difference in uptake rate between the forms of iron, Fe3+ or Fe2+ (Student’s t-test, P<0.05).