The evolution of empty nuptial gifts in a dance fly, Empis snoddyi (Diptera: Empididae): bigger isn't always better Jennifer A. SadowskiAllen J. MooreEdmund D. Brodie III ORIGINAL ARTICLE Pages: 161 - 166
Is avian humoral immunocompetence suppressed by testosterone? Dennis HasselquistJames A. MarshJohn C. Wingfield ORIGINAL ARTICLE Pages: 167 - 175
Size assessment in simulated territorial encounters between male green frogs (Rana clamitans) Mark A. BeeStephen A. PerrillPatrick C. Owen ORIGINAL ARTICLE Pages: 177 - 184
Positive association of queen number and queen-mating frequency Myrmica ants: a challenge to the genetic-variability hypotheses Jes S. PedersenJacobus J. Boomsma ORIGINAL ARTICLE Pages: 185 - 193
Ecological relevance of associative learning in fruit fly larvae Reuven Dukas ORIGINAL ARTICLE Pages: 195 - 200
Replacement males in the western bluebird: opportunity for paternity, chick-feeding rules, and fitness consequences of male parental care Janis L. DickinsonWesley W. Weathers ORIGINAL ARTICLE Pages: 201 - 209
Breeding synchrony and paternity in the barn swallow (Hirundo rustica) N. SainoC. R. PrimmerA. P. Møller ORIGINAL ARTICLE Pages: 211 - 218
Tropical arboreal ant mosaics: innate attraction and imprinting determine nest site selection in dominant ants Champlain Djieto-LordonAlain Dejean ORIGINAL ARTICLE Pages: 219 - 225
Regulation of pollen foraging in honeybee colonies: effects of young brood, stored pollen, and empty space Claudia DrellerRobert E. Page Jr.M. Kim Fondrk ORIGINAL ARTICLE Pages: 227 - 233
Effects of male dominance and courtship display on female choice in the ring-necked pheasant Concha MateosJuan Carranza ORIGINAL ARTICLE Pages: 235 - 244
Variance in female quality, operational sex ratio and male mate choice in a bushcricket Charlotta KvarnemoLeigh W. Simmons ORIGINAL ARTICLE Pages: 245 - 252
Mate choice among sympatric fur seals: female preference for conphenotypic males S. D. GoldsworthyD. J. BonessR. C. Fleischer ORIGINAL ARTICLE Pages: 253 - 267
Evolution of extreme polyandry in the honeybee Apis mellifera L. S. FuchsR. F. A. Moritz ORIGINAL ARTICLE Pages: 269 - 275
Imperfect female choice and male mating skew on leks of different sizes Rufus A. JohnstoneDavid J. D. Earn ORIGINAL ARTICLE Pages: 277 - 281
Multiple paternity in meadow voles (Microtus pennsylvanicus): investigating the role of the female Dominique BerteauxJoël BêtyJean-Marie Bergeron ORIGINAL ARTICLE Pages: 283 - 291
Paternal investment in Poecilimon veluchianus bushcrickets: beneficial effects of nuptial feeding on offspring viability Klaus Reinhold ORIGINAL ARTICLE Pages: 293 - 299
Task selection by workers of the fire ant Solenopsis invicta Deby Lee CassillWalter R. Tschinkel ORIGINAL ARTICLE Pages: 301 - 310
Time budgets and foraging in a Malagasy primate: do sex differences reflect reproductive condition and female dominance? Claire A. Hemingway ORIGINAL ARTICLE Pages: 311 - 322