This article reports on an experiment that tests whether a particular
representation of robotic control processes is adequate for capturing
significant variations in robot behavior. These variations can then be
explored by a selectionist mechanism that generates and tests variati
ons, An ecosystem modeled after a physical robotic ecosystem is introd
uced The ecosystem contains a robot that occasionally has to recharge,
as well as competitors that take away energy from the total system. T
he robot has to discover that its viability requires combating the com
petitors.