Abstract:
Department of Ecology and Evolutionary Biology, Division of Biology, University of Michigan, Ann Arbor 48104.
Present address: Department of Biology, University of Pennsylvania, Philadelphia, PA 19174.
This study was supported by NSF GB 35032X and BMS 75-14268. It is dedicated to all those tropical children whose
children will never see tropical nature in its natural complex beauty because their governments gave them development
and economic growth instead.