t al 1994, Hauert & Doebeli 2004, Szab6 & T5ke 1998, Szab6 et al. 2000), but evolutionary game dynamics have also been studied in continuous space (Hutson & Vickers 1992, 2002, Hofbauer 1999). Evolutionary graph theory is an extension of spatial games to more general popu- lation structures and social networks (Liebe