
Fig. 4. Effect of water NaCl concentration on whole-body Na+ and Cl uptake rates of Culex quinquefasciatus, a freshwater-obligate (A,B), and C. tarsalis, a euryhaline osmoconformer (C,D), held in Irvine tapwater (filled symbols) and low-NaCl medium for 2 days (open symbols). Values are means ± S.E.M.; N=46 for Na+ uptake, N=67 for Cl uptake.