Tim Clutton-Brock is Professor of Animal Ecology at the University of Cambridge. Josephine Pemberton is Reader in Molecular Ecology at the University of Edinburgh.

' A major, very important book in population biology, with first class contributors … a most valuable contribution to the ecology literature. I recommend it most highly.' Charles J. Krebs, University of British Columbia

• 1. Individuals and populations T. H. Clutton-Brock and J. M. Pemberton; 2. The sheep of St Kilda T. H. Clutton-Brock, J. M. Pemberton, T. N. Coulson, I.R. Stevenson and A. D. C. MacColl; 3. Population dynamics in Soay sheep T. H. Clutton-Brock, T. N. Coulson, A. D. C. MacColl, A. Illius; M. Forchhammer. K. Wilson, J. Lindström, M. J. Crawley and S. D. Albon; 4. Vegetation and sheep population dynamics M. J. Crawley, S. D. Albon, D. R. Bazely, J. Milner, J. G. Pilkington and A. L. Tuke; 5. Parasites and their impact K. Wilson, B. T. Grenfell, J. G. Pilkington, H. E. G. Boyd and F. M. D. Gulland; 6. Mating patterns and male breeding success J. M. Pemberton, D. W. Coltman, J. A. Smith and D. A. Bancroft; 7. Selection on phenotype J. M. Milner, S. D. Albon, L. E. B. Kruuk and J. M. Pemberton; 8. Molecular genetic variation and selection on genotype J. M. Pemberton, D. W. Coltman, D. R. Bancroft, J. A. Smith and S. Paterson; 9. Adaptive reproductive strategies I. R. Stevenson, P. Marrow, B. T. Preston, J. M. Pemberton and K. Wilson; 10. The causes and consequences of instability T. H. Clutton-Brock; Appendix 1. The flora of St Kilda M. J. Crawley ; Appendix 2. Inheritance of coat colour and horn type in Hirta Soay sheep D. W. Coltman and J. M. Pemberton; References.

Tim Clutton-Brock is Professor of Animal Ecology at the University of Cambridge. Josephine Pemberton is Reader in Molecular Ecology at the University of Edinburgh.

' A major, very important book in population biology, with first class contributors … a most valuable contribution to the ecology literature. I recommend it most highly.' Charles J. Krebs, University of British Columbia

• 1. Individuals and populations T. H. Clutton-Brock and J. M. Pemberton; 2. The sheep of St Kilda T. H. Clutton-Brock, J. M. Pemberton, T. N. Coulson, I.R. Stevenson and A. D. C. MacColl; 3. Population dynamics in Soay sheep T. H. Clutton-Brock, T. N. Coulson, A. D. C. MacColl, A. Illius; M. Forchhammer. K. Wilson, J. Lindström, M. J. Crawley and S. D. Albon; 4. Vegetation and sheep population dynamics M. J. Crawley, S. D. Albon, D. R. Bazely, J. Milner, J. G. Pilkington and A. L. Tuke; 5. Parasites and their impact K. Wilson, B. T. Grenfell, J. G. Pilkington, H. E. G. Boyd and F. M. D. Gulland; 6. Mating patterns and male breeding success J. M. Pemberton, D. W. Coltman, J. A. Smith and D. A. Bancroft; 7. Selection on phenotype J. M. Milner, S. D. Albon, L. E. B. Kruuk and J. M. Pemberton; 8. Molecular genetic variation and selection on genotype J. M. Pemberton, D. W. Coltman, D. R. Bancroft, J. A. Smith and S. Paterson; 9. Adaptive reproductive strategies I. R. Stevenson, P. Marrow, B. T. Preston, J. M. Pemberton and K. Wilson; 10. The causes and consequences of instability T. H. Clutton-Brock; Appendix 1. The flora of St Kilda M. J. Crawley ; Appendix 2. Inheritance of coat colour and horn type in Hirta Soay sheep D. W. Coltman and J. M. Pemberton; References.