Male Vervet Monkey (image) University of Zurich Share Print E-Mail Caption Male vervet monkeys use aggressive behavior against their own group members to inhibit them from fighting. Credit Jean Arseneau-Robar, UZH Usage Restrictions Only with credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.