1. Evolutionarily stable strategies of migration in heterogeneous environments

   • M. Plantegenest
   • P. Kindlmann

   OriginalPaper Pages: 229 - 244

2. Fighting costs stabilize aggressive behavior in intersexual conflicts

   • R. Härdling
   • V. Jormalainen
   • J. Tuomi

   OriginalPaper Pages: 245 - 265

3. Diel vertical migration of zooplankton: optimum migrating schedule based on energy accumulation

   • Tatsuki Sekino
   • Norio Yamamura

   OriginalPaper Pages: 267 - 282

4. Evolutionary rates of secondary sexual and non-sexual characters among birds

   • José Javier Cuervo
   • Anders Pape Møller

   OriginalPaper Pages: 283 - 303

5. Why do plants abort so many developing seeds: bad offspring or bad maternal genotypes?

   • Katri Kärkkäinen
   • Outi Savolainen
   • Veikko Koski

   OriginalPaper Pages: 305 - 317