Table 3. Statistical significance of differences in bat activity between control and experimental trials (*) denotes a significant result for both corrected P _Bonferroni (P values×number of comparisons) and uncorrected P-values.

Antenna position	Index of activity	Pulse length (µs)	Pulse repetition rate (Hz)	Duty cycle (%)	n	t	P	PBonferroni
Rotating	Bat passes	0.08	2100	0.0168	20	1.89	0.07	0.22
	Bat counts	0.08	2100	0.0168	20	1.50	0.15	0.45
	FBR	0.08	2100	0.0168	20	1.80	0.08	0.26
Fixed	Bat passes	0.08	2100	0.0168	20	2.54	0.02*	0.06
	Bat counts	0.08	2100	0.0168	20	2.87	0.01*	0.03*
	FBR	0.08	2100	0.0168	20	3.82	0.001*	0.003*
Fixed	Bat passes	0.3	1200	0.036	18	3.69	0.002*	0.006*
	Bat counts	0.3	1200	0.036	18	3.95	0.001*	0.003*
	FBR	0.3	1200	0.036	18	6.78	<0.001*	0.003*