Fig. 5. Relative expression of CasCAg (A) and CasCAc (B) mRNA in anterior (G3, white bars) and posterior (G7, black bars) gills of Callinectes sapidus acclimated to 35 p.p.t. (t=0) and at various times after being transferred to 15 p.p.t. Values are means ± s.e.m., N=4–14. Letters above bars indicate statistical comparisons within G7 across the time course: two columns not sharing at least one same letter are statistically different (P<0.05, two-way ANOVA, Tukey's and Fisher LSD's post-hoc tests). There were no significant differences among G3.