JEB -- Bury et al. 204 (21): 3779 Figure IG4

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Fig. 4. Concentration-dependent in vitro ferrous (Fe²⁺; filled symbols) and ferric (Fe³⁺; open symbols) iron absorption in the three regions of the intestine of the European flounder, anterior ( ${blacksquare}$ , ${square}$ ), mid ( ${circ}$ , ) and posterior ( ${blacktriangledown}$ , ${triangledown}$ ). Values are means ± S.E.M. (N=3–6). At each concentration and in each region of the intestine, the rate of iron absorption in the presence of Fe²⁺ is significantly greater than that in the presence of Fe³⁺ (Student’s t-test, P<0.05).