Fig. 6. In vitro rates of ferrous iron (Fe²⁺) absorption at 1 µmol l^–1 in the three regions of the intestine of the European flounder, (A,D) anterior, (B,E) mid and (C,F) posterior, of control (filled circles and open columns) and anaemic (open circles and filled columns) fish. Values are means + S.E.M. (N=4–5). An asterisk indicates a significant difference in the rates of iron absorption (Student’s t-test, P<0.05). Linear regression analysis for iron absorption versus haematocrit shows r=–0.57, P=0.085 for the anterior region, r=0.10, P=0.63 for the mid region and r=–0.86, P=0.003 for the posterior region.

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