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Fig. 6. Effects of K+ channel blockers on ventilation frequency in adult
zebrafish. Adults were immersed in control system water (Cont), 1 mmol
l1 quinidine (Quid), 25 mmol l1 NaCl, or
20 mmol l1 TEA + 5 mmol l1 4-AP. Only
quinidine induced a significant increase (asterisk) in ventilation frequency
(mean ± S.E.M.; P<0.005;
ANOVABonferroni test). Sample sizes are indicated in the figure.