Table 2. Total number of behavioural observations.

Species	Treatment	Argentine ants		Competitors
		Non Aggressive	Aggressive	Non Aggressive	Aggressive
M. antarcticum	0	20	10	26	4
	0.01 µg/µl	28	5	33	0
	1 µg/µl	36	5	40	1
	100 µg/µl	35	5	40	0
O. glaber	0	11	18	23	6
	0.01 µg/µl	14	22	32	4
	1 µg/µl	23	15	34	4
	100 µg/µl	23	12	33	2
T. jocosus	0	25	6	31	-
	0.01 µg/µl	35	3	38	-
	1 µg/µl	35	3	38	-
	100 µg/µl	35	2	37	-

Total number of observations of non-aggressive (behaviour scores 0, 1 and 2) and aggressive (behaviour scores 3 and 4) behaviour displayed by Argentine ants towards each competing species and observations for this species in return, as a function of pheromone concentration or no treatment.