This is a reprint of the classic first published in 1957. One of the authors, Raymond Beverton, recently died. His co-author, Sidney Holt, has written a new Foreword to this printing in which he reviews events in fisheries research and management through the past 50 years as these relate to their joint work. On the Dynamics of Exploited Fish Populations has become the most widely cited fisheries book ever published and the fact that the bulk of the information contained within its covers is still valid has led to this reprinting. Beverton and Holt's great work created a solid foundation for one of the two major global visions of the science of fisheries. This book was the genesis of the modern age-structured approach to the optimal management of fishery resources. Their approach led directly to a formulation of the fishery catch equation with almost universal applicability. Its advantage was that it produced easily interpreted outputs that could be clearly and directly applied to any fishery. Ultimately, this approach was the forerunner to VPA and allied techniques, the core of modern catch forecasting used in setting quotas and in managing commercial fisheries worldwide. Although the perception of the objectives of fisheries research has changed since the 1950s, and computers now enable calculations, data analysis, and theoretical exploration far beyond their capability at the time, Beverton and Holt will continue to be a source of inspiration and insight for many years to come. Sidney J. Holt was educated at Reading University, England. He has held academic positions at St John's College, Cambridge, England; University of California at Santa Cruz; University of Rhode Island; University of Malta. He is the author of 400 scientific papers, book chapters and popular articles, especially in the fields of fisheries science and management, conservation, protection of marine mammals, especially whales. He served 25 years in the United Nations system of Specialised Agel.