| | This journal provides immediate access to some articles. Macrofilaricidal activity of tetracycline against the filarial nematode Onchocerca ochengi: elimination of Wolbachia precedes worm death and suggests a dependent relationship. N G Langworthy, A Renz, U Mackenstedt, K Henkle-Dührsen, M B de Bronsvoort, V N Tanya, M J Donnelly, and A J Trees Proc Biol Sci. 2000 June 7; 267(1448): 1063–1069. PMCID: PMC1690645 The evolution of the serotonergic nervous system. A Hay-Schmidt Proc Biol Sci. 2000 June 7; 267(1448): 1071–1079. PMCID: PMC1690648 Penguins use the two-voice system to recognize each other. T Aubin, P Jouventin, and C Hildebrand Proc Biol Sci. 2000 June 7; 267(1448): 1081–1087. PMCID: PMC1690651 Oestrogen regulates male aggression in the non-breeding season. K K Soma, A D Tramontin, and J C Wingfield Proc Biol Sci. 2000 June 7; 267(1448): 1089–1096. PMCID: PMC1690643 The role of male accessory gland protein Acp36DE in sperm competition in Drosophila melanogaster. T Chapman, D M Neubaum, M F Wolfner, and L Partridge Proc Biol Sci. 2000 June 7; 267(1448): 1097–1105. PMCID: PMC1690647 Sperm precedence in a novel context: mating in a sessile marine invertebrate with dispersing sperm. J D Bishop, A J Pemberton, and L R Noble Proc Biol Sci. 2000 June 7; 267(1448): 1107–1113. PMCID: PMC1690652 A trade-off between reproduction and a condition-dependent sexually selected ornament in the house sparrow Passer domesticus. S C Griffith Proc Biol Sci. 2000 June 7; 267(1448): 1115–1119. PMCID: PMC1690642 Experimental analyses of sexual and natural selection on short tails in a polygynous warbler. A Balmford, M J Lewis, M L Brooke, A L Thomas, and C N Johnson Proc Biol Sci. 2000 June 7; 267(1448): 1121–1128. PMCID: PMC1690646 Size-specific defensive structures in a horned weevil confirm a classic battle plan: avoid fights with larger opponents. W G Eberhard, J M Garcia, and J Lobo Proc Biol Sci. 2000 June 7; 267(1448): 1129–1134. PMCID: PMC1690650 Regional endemism and cryptic species revealed by molecular and morphological analysis of a widespread species of Neotropical catfish. A P Martin and E Bermingham Proc Biol Sci. 2000 June 7; 267(1448): 1135–1141. PMCID: PMC1690641 Hot spots, indicator taxa, complementarity and optimal networks of taiga. K M Virolainen, P Ahlroth, E Hyvärinen, E Korkeamäki, J Mattila, J Päiivinen, T Rintala, T Suomi, and J Suhonen Proc Biol Sci. 2000 June 7; 267(1448): 1143–1147. PMCID: PMC1690649 Depressed pollination in habitat fragments causes low fruit set. S A Cunningham Proc Biol Sci. 2000 June 7; 267(1448): 1149–1152. PMCID: PMC1690653 Determinants of the abundance of invasive annual weeds: community structure and non-equilibrium dynamics. R P Freckleton, A R Watkinson, P M Dowling, and A R Ley Proc Biol Sci. 2000 June 7; 267(1448): 1153–1161. PMCID: PMC1690644 |