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Fig. 7. The influence, in stingrays acclimated to ion-poor Rio Negro water, of (A) DIDS (10-4 mol l-1), (B) SITS (10-4 mol l-1), (C) DPC (10-4 mol l-1) and (D) thiocyanate (10-4 mol l-1) on unidirectional (Jin; open bars) and net (filled bars) flux rates of Cl- during three successive 2 h periods. Values are means ± 1 S.E.M. (N=5). Other details as in the legend to Fig. 4.