Testosterone upregulates lipoprotein status to control sexual attractiveness in a colorful songbird Kevin J. McGrawStephanie M. CorreaElizabeth Adkins-Regan Original Article 23 December 2005 Pages: 117 - 122
Male mating speed promote hybridization in the Rana lessonae–Rana esculenta waterfrog system T. LengagneO. GroletP. Joly Original Article 19 January 2006 Pages: 123 - 130
Offensive and defensive sperm competition roles in the dung beetle Onthophagus taurus (Coleoptera: Scarabaeidae) Clarissa M. HouseLeigh W. Simmons Original Article 04 February 2006 Pages: 131 - 136
Lactation patterns of pinnipeds are not explained by optimization of maternal energy delivery rates Fritz TrillmichFranz J. Weissing Original Article 07 February 2006 Pages: 137 - 149
Divergence in female calling song discrimination between sympatric and allopatric populations of the southern wood cricket Gryllus fultoni (Orthoptera: Gryllidae) Yikweon JangH. Carl Gerhardt Original Article 01 February 2006 Pages: 150 - 158
Black spots and female association preferences in a sexual/asexual mating complex (Poecilia, Poeciliidae, Teleostei) Michael ToblerMartin PlathIngo Schlupp Original Article 01 March 2006 Pages: 159 - 165
Femoral secretions and copulatory plugs convey chemical information about male identity and dominance status in Iberian rock lizards (Lacerta monticola) Pedro L. MoreiraPilar LópezJosé Martín Original Article 02 February 2006 Pages: 166 - 174
Resource quality or harem size: what influences male tenure at refuge sites in tree weta (Orthoptera: Anostostomatidae)? Clint D. Kelly Original Article 15 March 2006 Pages: 175 - 183
Brood size manipulation affects frequency of second clutches in the blue tit D. ParejoE. Danchin Original Article 07 February 2006 Pages: 184 - 194
Determinants of predation risk in small wintering birds: the hawk’s perspective Timothy C. Roth IISteven L. LimaWilliam E. Vetter Original Article 02 February 2006 Pages: 195 - 204
Differentiated phenotypic plasticity in larvae of the cannibalistic salamander Hynobius retardatus Hirofumi Michimae Original Article 01 February 2006 Pages: 205 - 211
Sperm allocation in relation to male traits, female size, and copulation behaviour in freshwater crayfish species Diego RuboliniPaolo GaleottiMauro Fasola Original Article 07 February 2006 Pages: 212 - 219
Differences in reproductive success between laboratory and wild-derived golden hamsters (Mesocricetus auratus) as a consequence of inbreeding Peter FritzscheKarsten NeumannRolf Gattermann Original Article 01 March 2006 Pages: 220 - 226
Prey vulnerability in relation to sexual coloration of prey Anders Pape MøllerJan Tøttrup Nielsen Original Article 09 March 2006 Pages: 227 - 233
Bird song as a signal of aggressive intent William A. SearcyRindy C. AndersonStephen Nowicki Original Article 24 February 2006 Pages: 234 - 241
Spatio-temporal use of the urban habitat by feral pigeons (Columba livia ) Eva RosePeter NagelDaniel Haag-Wackernagel Original Article 01 March 2006 Pages: 242 - 254
Evidence of obligate female promiscuity in a socially monogamous passerine Frode FossøyArild JohnsenJan T. Lifjeld Original Article 03 March 2006 Pages: 255 - 259
Heterospecific song matching in two closely related songbirds (Parus major and P. caeruleus): great tits match blue tits but not vice versa Leen GorissenMarjan GorissenMarcel Eens Original Article 24 February 2006 Pages: 260 - 269
Among- and within-population variation in sperm quality in the simultaneously hermaphroditic land snail Arianta arbustorum Nicole MinorettiBruno Baur Original Article 17 March 2006 Pages: 270 - 280
Food or sex—males and females in a sex role reversed pipefish have different interests Anders BerglundGunilla RosenqvistSarah Robinson-Wolrath Original Article 02 March 2006 Pages: 281 - 287
