1. The relationship between parental age and reproductive effort in the California Gull (Larus californicus)

   • Bruce H. Pugesek

   OriginalPaper Pages: 161 - 171

2. The effect of group size on time budgets and social behaviour in wild long-tailed macaques (Macaca fascicularis)

   • Carel P. van Schaik
   • Maria A. van Noordwijk
   • Isolde den Tonkelaar

   OriginalPaper Pages: 173 - 181

3. Social organization of a free-ranging population of pine voles, Microtus pinetorum

   • Randall W. FitzGerald
   • Dale M. Madison

   OriginalPaper Pages: 183 - 187

4. Chivalry in pholcid spiders

   • William G. Eberhard
   • R. Daniel L. Briceño

   OriginalPaper Pages: 189 - 195

5. Do gold Midas cichlid fish win fights because of their color, or because they lack normal coloration?

   • George W. Barlow

   OriginalPaper Pages: 197 - 204

6. Moonlight's influence on predator/prey interactions between short-eared owls (Asio flammeus) and deermice (Peromyscus maniculatus)

   • Jennifer A. Clarke

   OriginalPaper Pages: 205 - 209

7. Sociality of grassland birds during winter

   • Joseph A. Grzybowski

   OriginalPaper Pages: 211 - 219

8. An equilibrium theory of queen production in honeybee colonies preparing to swarm

   • Douglas H. Baird
   • Thomas D. Seeley

   OriginalPaper Pages: 221 - 228

9. Display dispersion and diet of birds of paradise: a comparison of nine species

   • Bruce Beehler
   • Stephen G. Pruett-Jones

   OriginalPaper Pages: 229 - 238