The mAL inactivation by Kir2.1 decreases aggression and increases UWEs in intermale fights: mAL inactivation decreases (A) lunges and increases (C) UWE counts and (D) UWE time. (B) The mAL inactivation does not have any effect in boxing. For A–D, each circle represents lunges per 30 min, boxing per 30 min, UWE counts per 30 min, and UWE time in seconds per 30 min, respectively. For A–D, Kruskal–Wallis test followed by post hoc Dunn’s was performed (**P < 0.01, ***P <0.001, ns = not significant at P > 0.05). Genotypes and number of pairs used are shown below each plot. (E) The mAL inactivation decreases lunges and concomitantly increases UWEs: The x axis represents the observation period which is 1,800 s (or 30 min). Representative fights of (i) R43D01-GAL4/UAS-Kir2.1, (ii) R43D01-GAL4-only control, and (iii) UAS-Kir2.1-only control.