Table 1. Top row: Comparison between rms values of the head to tail electric organ discharge as measured in the same tank (45×26×4) at the same water conductivity and temperature.

	G. omari (N = 10, length between 11.6 and 22.5 cm)		G. carapo (N = 6, length between 20.6 and 29.8 cm)		G. coropinae (N = 12, length between 9.9 and 15.3 cm)
	Median	IQR	Median	IQR	Median	IQR
rms value (mV/cm)	40.28	37.56	22.92	4.7	2.59	1.4
normalized rms (mV/cm3)	0.15	0.08	0.051	0.013	0.018	0.005

Bottom row: the same individual values were normalized by the square of the fish's length according to the findings of Pereira et al [18]. Columns: median and interquartile range for each species. All these fish were recorded between 10 to 20 days after capture.