Table 1. Values for aggressiveness during one-on-one confrontations between workers.

I	Sites	A	B	C	D	E	F
	F, H for Cr. ranavalonae	2.9	2.7	2.9	3.7	3.0	3.1
II	Sites	A	B	C	D	E	F
	A	1.1	1.1	1.2	1.1	1.0	1.1
	B		1.2	1.4	1.2	1.2	1.1
	C			1.2	1.3	1.4	1.2
	D				1.3	1.1	1.0
	E					1.1	1.1
	F						1.1
III	Sites	F	G	H
	F	1.1	3.7	3.3
	G		1.0	3.2
	H			1.0

(I) Interspecific confrontations between Technomyrmex albipes (colonies from areas A–F) and Cr. ranavalonae workers (from areas F, G). Areas A–E correspond to a total of ca. 8.4 km of shoreline, while area F is situated 1.7 km inland. Aggressiveness values were recorded only for T. albipes workers and calculated for cases where they initiated the encounters. Statistical comparisons (Kruskal–Wallis tests); T. albipes vs. Cr. ranavalonae: H⁵ ₆₀ = 9.5; P = 0.092. (II) Intraspecific aggressiveness between T. albipes workers; control lot or individuals from the same tree: H⁵ ₆₀ = 3.4; P = 0.80; experimental lot or individuals from two different areas: H¹⁴ ₁₅₀ = 13.2; P = 0.51. Comparison taking into account inter- and intraspecific confrontations: H² ₁₅₀ = 1573.1; P<0.0001; Dunn's multiple comparison tests, T. albipes workers confronted with Cr. ranavalonae vs. T. albipes workers from the control or the experimental group: P<0.001 in both cases; confrontations between T. albipes workers (control vs. experimental lot): P>0.05. (III) Intraspecific aggressiveness between Cr. ranavalonae workers gathered from three different areas (F, G, H). Workers from the same area/colony were not aggressive with each other, while this was not the case for those from different areas. Statistical comparisons (Kruskal–Wallis tests): H⁵ ₆₀ = 49.46; P<0.0001; Dunn's multiple comparison tests, workers from the same area: P>0.05 in all cases; from two different areas: P<0.05; workers from same area vs. from two different areas (control vs. experimental lots): P<0.01.