1. Regular systems of inbreeding

   • Wayne Boucher
   • Thomas Nagylaki

   OriginalPaper Pages: 121 - 142

2. Oscillations in a system with material cycling

   • E. Beretta
   • G. I. Bischi
   • F. Solimano

   OriginalPaper Pages: 143 - 167

3. Mappings of the plane that simulate prey-predator systems

   • Manuel Rotenberg

   OriginalPaper Pages: 169 - 191

4. Harvesting under density-dependent mortality and fecundity

   • D. R. Grey

   OriginalPaper Pages: 193 - 197

5. The biennial life strategy in a random environment

   • J. B. T. M. Roerdink

   OriginalPaper Pages: 199 - 215

6. Permanence of some ecological systems with several predator and one prey species

   • Gabriela Kirlinger

   OriginalPaper Pages: 217 - 232

7. Announcement

   Announcement Pages: 233 - 233