Orangutans: Geographic Variation in Behavioral Ecology and Conservation

Serge Wich received his MSc in animal behaviour in 1995 at Utrecht University (the Netherlands) for which he conducted a study on food competition in wild Sumatran orangutans. In 2002, he received his PhD from the same university for a study on the structure and function of male Thomas langur long-distance vocalizations.In 2003, he started as a post-doc at Utrecht University to study 'cultural behaviour' of orangutans in two orangutans in two orangutan poplulationsone on Sumatra and on on Borneo. Currently he is a visiting scientist at Great Ape Trust of Iowa from where he continues with field work on Sumatran orangutans and is currently also involved in studies on the orangutans and bonobos at Great Ape Trust.S. Suci Utami Atmoko started conducting research on orangutans while at the Universitas Nasional in Jakarta where she received her BA for a study on female reproduction.She continued her orangutan research on male bimaturism research at Utrecht University where she obtained her PhD in 2000. Since then she has been involved in orangutan research and conservation activities in Borneo and Sumatra. She is currently a lecturer at Univeritas nasional (jakarta, Indonesia).Tatang Mitra Setia started studying Indonesian primates in 1979 at the Ketambe research site. In 1988 he began his studies on social relationships of orangutans. In 1995 he received a MSc at Universitas Indonesia (Jakarta, Indonesia). He is involved in orangutan research on both Borneo and Sumatra and currently he is the Dean of the Biology Faculty of Universitas Nasional (Jakrta, Indonesia).Carel van Schaik has studied primates in Indonesia and elsewhere since 1976. He received his MSc at Utrecht University (the Netherlands) for a study on behavioral ontogeny in orangutans. In 1985 he obtained his PhD at the same unviersity for a study on the socioecology of long-tailed macaques. After a post-doc at Princeton University, he worked as a lectured at Utrecht University and later as a Professor at Duke University. He is interested in the social evolution of primates and currentlystudies orangutans at two sites in Indonesia. He is the author of a large number of scientific articles and has edited several books on topics ranging from male infanticide to primate conservaton. Currently he is professor at and the director of the Antropological Institute & Museum of the University ofZurich, Switzerland.