Testosterone-Fueled Meerkats (IMAGE) Duke University Caption Studies find that female meerkats can produce up to twice as much testosterone as their male counterparts. Their unusual hormone levels fuel their bullying behavior, but at a cost. Credit Photo courtesy of Charli Davies, Duke University. Usage Restrictions None License Licensed content 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.