Fig. 4. Bulk water absorption rates (A) and net ion transport rates (Na⁺, solid bars; Cl^–, hatched bars) (B) across the isolated killifish intestine decreased after transfer from brackish water (BW; 10% seawater; grey bars) to seawater (SW; black bars). Net absorption occurs in the positive direction. Data are expressed as means ± s.e.m. (N shown within each bar). ^*Significantly different from pre-transfer (Pre) brackish water control (assessed using a post-hoc test; P0.05). Net Cl^– flux was greater than net Na⁺ flux overall (by two-way ANOVA).