1. Analysis of brood sex ratios: implications of offspring clustering

   • Sven Krackow
   • Emil Tkadlec

   Review Pages: 293 - 301

2. Evidence of unconstrained directional selection for male tallness

   • Ulrich Mueller
   • Allan Mazur

   Original Article Pages: 302 - 311

3. Offspring sex ratio is unrelated to male attractiveness in dark-eyed juncos (Junco hyemalis)

   • Jennifer L. Grindstaff
   • Alex C. Buerkle
   • Ellen D. Ketterson

   Original Article Pages: 312 - 316

4. Echolocation behavior and signal plasticity in the Neotropical bat Myotis nigricans (Schinz, 1821) (Vespertilionidae): a convergent case with European species of Pipistrellus?

   • Björn M. Siemers
   • Elisabeth K. Kalko
   • Hans-Ulrich Schnitzler

   Original Article Pages: 317 - 328

5. Determinants of group size in the red colobus monkey (Procolobus badius): an evaluation of the generality of the ecological-constraints model

   • Thomas R. Gillespie
   • Colin A. Chapman

   Original Article Pages: 329 - 338

6. Factors which affect the occurrence of cannibalism and the broad-headed "cannibal" morph in larvae of the salamander Hynobius retardatus

   • Hirofumi Michimae
   • Masami Wakahara

   Original Article Pages: 339 - 345

7. Female choice in the guppy (Poecilia reticulata): the interaction between male color and display

   • Astrid Kodric-Brown
   • Paul F. Nicoletto

   Original Article Pages: 346 - 351

8. Individual and collective decision-making during nest site selection by the ant Leptothorax albipennis

   • E. Mallon
   • S. Pratt
   • N. Franks

   Original Article Pages: 352 - 359

9. Invest in arms: behavioural and energetic implications of multiple autotomy in starfish (Asterias rubens)

   • K. Ramsay
   • M. Kaiser
   • C. Richardson

   Original Article Pages: 360 - 365

10. Regulation of ovary activation in worker honey-bees (Apis mellifera): larval signal production and adult response thresholds differ between anarchistic and wild-type bees

    • B. Oldroyd
    • T. Wossler
    • F. Ratnieks

    Original Article Pages: 366 - 370

11. Worker policing and worker reproduction in Apis cerana

    • Benjamin P. Oldroyd
    • Luke A. Halling
    • Francis L. Ratnieks

    Original Article Pages: 371 - 377

12. 'Voyeurism' prolongs copulation in the dragon lizard Ctenophorus fordi

    • Mats Olsson

    Original Article Pages: 378 - 381

13. The phenology of a Neotropical ant assemblage: evidence for continuous and overlapping reproduction

    • Michael Kaspari
    • John Pickering
    • Donald Windsor

    Original Article Pages: 382 - 390