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Fig. 2. Plasma sodium (N>5) (A) and chloride (N>5) (B)
levels in northern (black) and southern (grey) killifish before (pre) and
after transfer from brackish water (BW; 10 g l-1) to either
brackish water (squares) or freshwater (FW; triangles). Data are expressed as
means ± S.E.M. *Significant
difference from time-matched brackish water control (P<0.05).
Plasma Na data for northern killifish have been previously reported
(Scott et al., 2004).