Figure 2.

The effects of discordant and concordant alcohol consumption on aggression frequency during the resident-intruder (RI) test in male prairie voles. (A) Alcohol consumption in males did not differ between treatment groups. (B) There was a significant difference between the alcohol preference ratio between the Both EtOH and Male only EtOH groups. (C) Aggression frequency toward a stranger male during the RI test did not differ between male subjects in the three treatment groups. (D) When the alcohol consumption and alcohol preference ratio between the two alcohol-consuming groups were matched, there was still no difference in aggression frequency between the two groups. Error bars indicate mean ± SEM.