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Summary of effects of SP (control, 0.1, 1, 5 μM) on gill and buccal burst amplitude (% control) (A) and lung burst amplitude (B) for pre-metamorphic (unfilled circles) and post-metamorphic (filled circles) brainstems. There were significant increases in buccal and lung burst amplitudes for post-metamorphic brainstems at the highest SP concentration (5 μM) which persisted throughout the washout period. *P<0.05 compared with control (Dunnett’s test).
