Fig. 6. Mean electric organ discharge (EOD) duration (A) and amplitude ratio (B) (error bars ± 1 S.E.M.; N=5 per group) as a function of pseudo-dominance status under conditions of restricted interaction (female G. petersii dyads). Pseudo-dominant females showed increases in EOD duration relative to their neighbors. Pseudo-subordinates showed no increase in amplitude ratio during the interaction period, although amplitude ratio did remain higher than or comparable with that of the pseudo-dominant group throughout the interaction. The horizontal bar spanning days 4–8 represents the duration of interaction.