| | This journal provides immediate access to some articles. Multiple causes of sexual segregation in European red deer: enlightenments from varying breeding phenology at high and low latitude. Christophe Bonenfant, Leif E Loe, Atle Mysterud, Rolf Langvatn, Nils Chr Stenseth, Jean-Michel Gaillard, and François Klein Proc Biol Sci. 2004 May 7; 271(1542): 883–892. PMCID: PMC1691684 The herring gull complex is not a ring species. Dorit Liebers, Peter de Knijff, and Andreas J. Helbig Proc Biol Sci. 2004 May 7; 271(1542): 893–901. PMCID: PMC1691675 Pythons metabolize prey to fuel the response to feeding. J Matthias Starck, Patrick Moser, Roland A Werner, and Petra Linke Proc Biol Sci. 2004 May 7; 271(1542): 903–908. PMCID: PMC1691678 Postural role of lateral axial muscles in developing bottlenose dolphins (Tursiops truncatus). Shelley A Etnier, Jennifer L Dearolf, William A McLellan, and D Ann Pabst Proc Biol Sci. 2004 May 7; 271(1542): 909–918. PMCID: PMC1691682 Age and size at maturity: sex, environmental variability and developmental thresholds. Stewart J Plaistow, Craig T Lapsley, Andrew P Beckerman, and Tim G Benton Proc Biol Sci. 2004 May 7; 271(1542): 919–924. PMCID: PMC1691673 Costs of immunity: immune responsiveness reduces survival in a vertebrate. Sveinn Are Hanssen, Dennis Hasselquist, Ivar Folstad, and Kjell Einar Erikstad Proc Biol Sci. 2004 May 7; 271(1542): 925–930. PMCID: PMC1691677 Feedback control of T-cell receptor activation. Cliburn Chan, Jaroslav Stark, and Andrew J T George Proc Biol Sci. 2004 May 7; 271(1542): 931–939. PMCID: PMC1691681 Unravelling migrations in the steppe: mitochondrial DNA sequences from ancient central Asians. C Lalueza-Fox, M L Sampietro, M T P Gilbert, L Castri, F Facchini, D Pettener, and J Bertranpetit Proc Biol Sci. 2004 May 7; 271(1542): 941–947. PMCID: PMC1691686 A receiver bias in the origin of three-spined stickleback mate choice. Carl Smith, Iain Barber, Robert J Wootton, and Lars Chittka Proc Biol Sci. 2004 May 7; 271(1542): 949–955. PMCID: PMC1691680 Nine-spined sticklebacks exploit the most reliable source when public and private information conflict. Yfke van Bergen, Isabelle Coolen, and Kevin N Laland Proc Biol Sci. 2004 May 7; 271(1542): 957–962. PMCID: PMC1691685 Experimental evidence that kin discrimination in the Seychelles warbler is based on association and not on genetic relatedness. Jan Komdeur, David S Richardson, and Terry Burke Proc Biol Sci. 2004 May 7; 271(1542): 963–969. PMCID: PMC1691676 The influence of contests on optimal clutch size: a game-theoretic model. Mike Mesterton-Gibbons and Ian C W Hardy Proc Biol Sci. 2004 May 7; 271(1542): 971–978. PMCID: PMC1691679 The role of male disease susceptibility in the evolution of haplodiploid insect societies. Sean O'Donnell and Samuel N Beshers Proc Biol Sci. 2004 May 7; 271(1542): 979–983. PMCID: PMC1691683 Palaeoecology and palaeophytogeography of the rhynie chert plants: evidence from integrated analysis of in situ and dispersed spores. Charles H Wellman Proc Biol Sci. 2004 May 7; 271(1542): 985–992. PMCID: PMC1691674 |