Regulation of honey bee division of labor by colony age demography Zhi-Yong HuangG. E. Robinson Pages: 147 - 158
Emigration mechanisms in feral house mice – a laboratory investigation of the influence of social structure, population density, and aggression Gabriele Gerlach Pages: 159 - 170
Operational sex ratio versus gender density as determinants of copulation duration in the walnut fly, Rhagoletis juglandis (Diptera: Tephritidae) H. Alonso-PimentelDaniel R. Papaj Pages: 171 - 180
Provisional rejection of three alternative hypotheses on the maintenance of a size dichotomy in males of Dawson’s burrowing bee, Amegilla dawsoni (Apidae, Apinae, Anthophorini) John Alcock Pages: 181 - 188
Biased primary sex ratio in the bushcricket Poecilimon veluchianus, an insect with sex chromosomes K. Reinhold Pages: 189 - 194
Song ranging by the dusky antbird, Cercomacra tyrannina: ranging without song learning E. S. MortonK. C. Derrickson Pages: 195 - 201
Hatching asynchrony and survival of insurance offspring in an obligate brood reducing species, the American white pelican Roger M. Evans Pages: 203 - 209
