Figure 1.
Mean level of intraspecific aggression between Linepithema humile workers for intracity (1–72 km apart) and intercity (634–2757 km apart) comparisons of paired nests (n = 5 assays for each pairwise comparison).
Mean level of intraspecific aggression between Linepithema humile workers for intracity (1–72 km apart) and intercity (634–2757 km apart) comparisons of paired nests (n = 5 assays for each pairwise comparison).