1. Courting virtual rivals increase ejaculate size in sticklebacks (Gasterosteus aculeatus)

   • Marc Zbinden
   • Dominique Mazzi
   • Theo C. M. Bakker

   Original Article 15 May 2003 Pages: 205 - 209

   

2. The effect of food availability on the semilunar courtship rhythm in the fiddler crab Uca lactea (de Haan) (Brachyura: Ocypodidae)

   • Tae Won Kim
   • Jae C. Choe

   Original Article 14 May 2003 Pages: 210 - 217

   

3. Chemosensory cues allow male lizards Psammodromus algirus to override visual concealment of sexual identity by satellite males

   • Pilar López
   • José Martín
   • Mariano Cuadrado

   Original Article 16 May 2003 Pages: 218 - 224

   

4. Effects of relaxed predation pressure on visual predator recognition in the guppy

   • Jennifer L. Kelley
   • Anne E. Magurran

   Original Article 20 May 2003 Pages: 225 - 232

   

5. Corticosterone levels in relation to migratory readiness in red-eyed vireos (Vireo olivaceus)

   • Mare Lõhmus
   • Roland Sandberg
   • Frank R.Moore

   Original Article 15 May 2003 Pages: 233 - 239

   

6. Egg size and laying order in relation to offspring sex in the extreme sexually size dimorphic brown songlark, Cinclorhamphus cruralis

   • Michael J. L. Magrath
   • Lyanne Brouwer
   • Jan Komdeur

   Original Article 28 May 2003 Pages: 240 - 248

   

7. Investment in territorial defence depends on rearing environment in brown trout (Salmo trutta)

   • L. Fredrik Sundström
   • Mare Lõhmus
   • Jörgen I. Johnsson

   Original Article 14 May 2003 Pages: 249 - 255

   

8. Evidence for differential selection and potential adaptive evolution in the worker caste of an inquiline social parasite

   • Seirian Sumner
   • William O. H. Hughes
   • Jacobus J. Boomsma

   Original Article 14 May 2003 Pages: 256 - 263

   

9. Current versus future reproduction: an experimental test of parental investment decisions using nest desertion by mallards (Anas platyrhynchos)

   • Joshua T. Ackerman
   • John McA. Eadie

   Original Article 20 May 2003 Pages: 264 - 273

   

10. Variation in fertilisation abilities between hemiclonal hybrid and sexual parental males of sympatric water frogs (Rana lessonae, R. esculenta, R. ridibunda)

    • Heinz-Ulrich Reyer
    • Bettina Niederer
    • Attila Hettyey

    Original Article 03 June 2003 Pages: 274 - 284

    

11. Variability in adult group compositions of a prosimian primate

    • Sharon T. Pochron
    • Patricia C. Wright

    Original Article 27 May 2003 Pages: 285 - 293

12. Primary sex ratios in zebra finches: no evidence for adaptive manipulation in wild and semi-domesticated populations.

    • Richard Zann
    • David Runciman

    Original Article 20 May 2003 Pages: 294 - 302

13. The role of sexual harassment in cave and surface dwelling populations of the Atlantic molly, Poecilia mexicana (Poeciliidae, Teleostei)

    • Martin Plath
    • Jakob Parzefall
    • Ingo Schlupp

    Original Article 20 May 2003 Pages: 303 - 309

    

14. Effects of prey quantity on predatory wasps (Polistes dominulus) when patch quality differs

    • Tracy R. Armstrong
    • Nancy E. Stamp

    Original Article 20 May 2003 Pages: 310 - 319

    

15. Forced dispersal of juvenile guanacos (Lama guanicoe): causes, variation, and fates of individuals dispersing at different times

    • Ronald J. Sarno
    • Michael S. Bank
    • William L. Franklin

    Erratum 22 May 2003 Pages: 320 - 320