| | This journal provides immediate access to some articles. Hybridizing Old and New World camelids: Camelus dromedarius x Lama guanicoe. J A Skidmore, M Billah, M Binns, R V Short, and W R Allen Proc Biol Sci. 1999 April 7; 266(1420): 649–656. PMCID: PMC1689826 Estimating population size by genotyping faeces. M H Kohn, E C York, D A Kamradt, G Haught, R M Sauvajot, and R K Wayne Proc Biol Sci. 1999 April 7; 266(1420): 657–663. PMCID: PMC1689828 Market forces predict grooming reciprocity in female baboons L. Barrett, S. P. Henzi, T. Weingrill, J. E. Lycett, and R. A. Hill Proc Biol Sci. 1999 April 7; 266(1420): 665. doi: 10.1098/rspb.1999.0687.PMCID: PMC1689832 Deep-diving behaviour of the northern bottlenose whale, Hyperoodon ampullatus (Cetacea: Ziphiidae) S. K. Hooker and R. W. Baird Proc Biol Sci. 1999 April 7; 266(1420): 671. doi: 10.1098/rspb.1999.0688.PMCID: PMC1689818 Molecular phylogenetic evidence for the evolution of specialization in anemonefishes. J K Elliott, S C Lougheed, B Bateman, L K McPhee, and P T Boag Proc Biol Sci. 1999 April 7; 266(1420): 677–685. PMCID: PMC1689819 How quickly do brains catch up with bodies? A comparative method for detecting evolutionary lag. R O Deaner and C L Nunn Proc Biol Sci. 1999 April 7; 266(1420): 687–694. PMCID: PMC1689825 Pleistocene effects on North American songbird evolution J. Klicka and R. M. Zink Proc Biol Sci. 1999 April 7; 266(1420): 695. doi: 10.1098/rspb.1999.0691.PMCID: PMC1689824 The maintenance of vocal learning by gene-culture interaction: the cultural trap hypothesis R. F. Lachlan and P. J. B. Slater Proc Biol Sci. 1999 April 7; 266(1420): 701. doi: 10.1098/rspb.1999.0692.PMCID: PMC1689831 Sex, death, and genetic variation: natural and sexual selection on cricket song D. A. Gray and W. H. Cade Proc Biol Sci. 1999 April 7; 266(1420): 707. doi: 10.1098/rspb.1999.0693.PMCID: PMC1689821 Balancing sexual selection through opposing mate choice and male competition A. J. Moore and P. J. Moore Proc Biol Sci. 1999 April 7; 266(1420): 711. doi: 10.1098/rspb.1999.0694.PMCID: PMC1689829 Simultaneous mating with multiple males reduces fertilization success in the myobatrachid frog Crinia georgiana P. G. Byrne and J. D. Roberts Proc Biol Sci. 1999 April 7; 266(1420): 717. doi: 10.1098/rspb.1999.0695.PMCID: PMC1689823 Habitat persistence, habitat availability and the evolution of dispersal J. M. J. Travis and C. Dytham Proc Biol Sci. 1999 April 7; 266(1420): 723. doi: 10.1098/rspb.1999.0696.PMCID: PMC1689820 Evolution of life history in balsam fir (Abies balsamea) in subalpine forests J. Silvertown and M. Dodd Proc Biol Sci. 1999 April 7; 266(1420): 729. doi: 10.1098/rspb.1999.0697.PMCID: PMC1689817 Male-killing Wolbachia in two species of insect G. D. D. Hurst, F. M. Jiggins, J. H. G. von der Schulenburg, D. Bertrand, S. A. West, I. I. Goriacheva, I. A. Zakharov, J. H. Werren, R. Stouthamer, and M. E. N. Majerus Proc Biol Sci. 1999 April 7; 266(1420): 735. doi: 10.1098/rspb.1999.0698.PMCID: PMC1689827 Selection for high and low virulence in the malaria parasite Plasmodium chabaudi. M J Mackinnon and A F Read Proc Biol Sci. 1999 April 7; 266(1420): 741–748. PMCID: PMC1689830 Moon and sun compasses in sandhoppers rely on two separate chronometric mechanisms A. Ugolini, C. Melis, R. Innocenti, B. Tiribilli, and C. Castellini Proc Biol Sci. 1999 April 7; 266(1420): 749. doi: 10.1098/rspb.1999.0700.PMCID: PMC1689822 Enhanced immune function does not depress reproductive output T. D. Williams, J. K. Christians, J. J. Aiken, and M. Evanson Proc Biol Sci. 1999 April 7; 266(1420): 753. doi: 10.1098/rspb.1999.0701.PMCID: PMC1689833 |