This journal provides immediate access to some articles. Volume 270(1512); February 7, 2003 Female multiple mating behaviour, early reproductive failure and litter size variation in mammals. PMCID: PMC1691234 Honesty and cheating in cleaning symbioses: evolutionarily stable strategies defined by variable pay-offs. PMCID: PMC1691242 Biological identifications through DNA barcodes. PMCID: PMC1691236 | ||