Basurto Coop Fleet (IMAGE) Duke University Caption A Duke-led study in four fishing communities of Baja California used game theory and surveys to determine that Marine Protected Areas (MPAs) positively affect the behaviors of fishers and non-fishers alike by encouraging a healthy balance of friendship and rivalry. Credit Xavier Basurto, 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.