African Penguins (IMAGE) University of Exeter Caption These are an endangered African penguins on Robben Island, South Africa, where former South African president, Nelson Mandela spent 18 of his 27 years in prison. Restrictions on commercial fishing in a 20 km radius around Robben Island led to improved penguin chick survival. Credit © Davide Gaglio, <a href="http://davygaglio.wix.com/home" target="_blank">http://davygaglio.wix.com/home</a> Usage Restrictions Use credit 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.