Zonation of intestinal ion transport in unfed and fed <i>C</i>. <i>auratus</i>.

A) Mg2+ flux zonation along the GIT for both fed (N = 5) and fasted (N = 7) C. auratus. B) Ca2+ flux zonation along the GIT for both fed (N = 4) and fasted (N = 4) C. auratus. C) H+ flux zonation along the GIT for both fed (N = 4) and fasted (N = 4) C. auratus. Non-everted preparations were created by dividing the GIT into 8 equal length segments. Positive numbers indicate appearance in the serosal fluid suggesting mucosal-to-serosal movement. Data represent mean flux ± S.E.M. A two-way repeated measures ANOVA followed by a Holm-Sidak test was used (segment and fasting status as factors). No significant interaction effect was detected. Different letters within each panel indicate significant difference (p<0.05).