Figure 5.

Territorial aggression in captive-born island and mainland mice. (a) Schematic of the resident–intruder behavioural assay using captive-born males paired with a female for one week. (b) Aggressive behaviours in short-term pairings. Bar graphs (top) show proportions of mice engaging in each behaviour. Boxplots (bottom) show the duration of each behaviour for those individuals that engaged in that behaviour. See Methods for statistical details. (c) Schematic of the behavioural assay using captive-born males paired with a female for 3–14 months, and then testing males approximately 1 h after the onset of mating attempts and again 1 day later. (d) Aggressive behaviours in long-term pairings. Sample sizes are provided. n.s., not significant. (Online version in colour.)