Fig. 2. Plasma concentrations of (A) chloride (Cl^–, dashed line), sodium (Na⁺, solid line), (B) potassium (K⁺, solid line), calcium (Ca²⁺, dashed line) and magnesium (Mg²⁺, dotted line), over the duration of the experiment in which fish were fed a 1% of body mass ration via an oesophageal catheter. Values are means ± s.e.m. (N=11). A single asterisk denotes P<0.05, whereas a double asterisk indicates P<0.01 [adjusted P value; RM-ANOVA followed by a multiple pairwise control (pre-feed) comparisons versus post-feed groups using the Bonferroni t-test method].