List of contributors; Preface; 1. The study of mammalian cooperative breeding Nancy G. Solomon and Jeffrey A. French; 2. The bioenergetics of parental behaviour and the evolution of alloparental care in marmosets and tamarins Suzette D. Tardif; 3. Proximate regulation of singular breeding in Callitrichid primates Jeffrey A. French; 4. Cooperative breeding, reproductive suppression and body size in canids Patricia D. Moehlman and Heribert Hofer; 5. Hormonal and experiential factors in the expression of social and parental behaviour in canids Cheryl S. Asa; 6. Variation in reproductive suppression among dwarf mongooses: interplay between mechanisms and evolution Scott R. Creel and Peter M. Waser; 7. Dynamic optimization and cooperative breeding: an evaluation of future fitness effects Jeffrey R. Lucas, Scott R. Creel and Peter M. Waser; 8. Examination of alternative hypotheses for cooperative breeding in rodents Nancy G. Solomon and Lowell L. Getz; 9. The psychobiological basis of cooperative breeding in rodents C. Sue Carter and R. Lucille Roberts; 10. Cooperative breeding in naked mole-rats: implications for vertebrate and invertebrate sociality Eileen A. Lacey and Paul W. Sherman; 11. The physiology of a reproductive dictatorship: regulation of male and female reproduction by a single breeding female in colonies of naked mole-rats Christopher G. Faulkes and David H. Abbott; 12. Factors influencing the occurrence of communal care in plural breeding mammals Susan E. Lewis and Anne E. Pusey; 13. A bird's-eye view of mammalian cooperative breeding Ronald L. Mumme; Index.