1. How honeybees perceive communication dances, studied by means of a mechanical model

   • Axel Michelsen
   • Bent Bach Andersen
   • Martin Lindauer

   OriginalPaper Pages: 143 - 150

2. Birth sex ratios in sheep over six lambing seasons

   • J.P. Kent

   OriginalPaper Pages: 151 - 155

3. Effectiveness of the mating plug in Atrophaneura alcinous (Lepidoptera : Papilionidae)

   • K. Matsumoto
   • N. Suzuki

   OriginalPaper Pages: 157 - 163

4. Competition for a mate restricts mate search of female pied flycatchers

   • Svein Dale
   • Helge Rinden
   • Tore Slagsvold

   OriginalPaper Pages: 165 - 176

5. Relationship between the position preference and nutritional state of individuals in schools of juvenile roach (Rutilus rutilus)

   • Jens Krause
   • Dirk Bumann
   • Dietmar Todt

   OriginalPaper Pages: 177 - 180

6. The dance language of the honeybee mutant diminutive wings

   • Wolfgang H. Kirchner
   • Kathrin Sommer

   OriginalPaper Pages: 181 - 184

7. The effect of intrauterine position on the survival, reproduction and home range size of female house mice (Mus musculus)

   • William J. Zielinski
   • Frederick S. vom Saal
   • John G. Vandenbergh

   OriginalPaper Pages: 185 - 191

8. Multiple paternity in a wild population of northern water snakes, Nerodia sipedon

   • Frances E. Barry
   • Patrick J. Weatherhead
   • David P. Philipp

   OriginalPaper Pages: 193 - 199

9. Egg cannibalism by sticklebacks: spite or selfishness?

   • Gerard J. FitzGerald

   OriginalPaper Pages: 201 - 206

10. Search tactics of a pause-travel predator: adaptive adjustments of perching times and move distances by hawk owls (Surnia ulula)

    • Geir A. Sonerud

    OriginalPaper Pages: 207 - 217

11. Effects of interactions among genotypically diverse nestmates on task specialization by foraging honey bees (Apis mellifera)

    • Nicholas W. Calderone
    • Robert E. Page Jr.

    OriginalPaper Pages: 219 - 226

12. The evolution of leks through female choice: differential clustering and space utilization in six sympatric manakins

    • Marc Théry

    OriginalPaper Pages: 227 - 237

13. Behavioral resource depression and decaying perceived risk of predation in two species of coexisting gerbils

    • Burt P. Kotler

    OriginalPaper Pages: 239 - 244

14. Blue eggs do not reduce nest predation in the song thrush, Turdus philomelos

    • Frank Götmark

    OriginalPaper Pages: 245 - 252

15. Genetic relatedness of worker nestmates in Myrmica ruginodis (Hymenoptera : Formicidae) populations

    • P. Seppii

    OriginalPaper Pages: 253 - 260

16. Sperm transfer, displacement and precedence in Ischnura graellsii (Odonata : Coenagrionidae)

    • A. Corderos
    • P.L. Miller

    OriginalPaper Pages: 261 - 267

17. Sexual exchange relationships in captive chimpanzees?

    • Charlotte K. Hemelrijk
    • Gerard J. van Laere
    • Jan A.R.A.M. van Hooff

    OriginalPaper Pages: 269 - 275

18. Experimental manipulation of mate choice by male katydids: the effect of female encounter rate

    • Todd E. Shelly
    • Winston J. Bailey

    OriginalPaper Pages: 277 - 282

19. Vigilance and foraging substrate: anti-predatory considerations in a non-standard environment

    • Steven L. Lima

    OriginalPaper Pages: 283 - 289