Table 1. Summarized experimental trial information and results.

Trial dates (2012)	Trial length (hours)	No. collectors per treatment	Total spat count n	% Spat on collectors with sound replay (k)	p(≥k, n, 0.5)*
13–16 Jul	72	5	16	75.7 (12)	0.0384
26–30 Jul	96	6	63	68.3 (43)	0.0026
30 Jul–3 Aug	96	5	9	100.0 (9)	0.0020
3–6 Aug	72	5	22	100.0 (22)	<0.0001
6–9 Aug	72	6	29	69.0 (20)	0.0307
10–15 Aug	120	5	360	85.6 (308)	<0.0001
23–27 Aug	96	6	504	47.0 (237)	0.9164
27–31 Aug	96	6	682	48.8 (333)	0.7171

Notes.

^*Probability of observing k or more spat on the replayed sound collectors, given n total recruits and an expected proportion equal to 0.5. For pooled data: p(≥k, n, 0.5) < 0.0001, k = 984, n = 1,685.