This edited volume of peer-reviewed papers is based on contributions to the International Conference on Fish Migration and Bypass Channels held in Vienna in September 1996. It covers the range of fish pass technologies currently in use throughout the world and attempts to develop a wider, more ecological perspective on this formerly engineering-orientated discipline. Emphasis is placed on enhancing an understanding of fish migration behaviour, and achieving optimum design to meet the behavioural requirements of all known migratory species. Additional attention is paid to comparing the European trend towards constructing nature-like bypass channels with the highly technical solutions dominant in North America.

In recent years, shrimp has become the most valuable fishery in the United States with the annual yield valued in the region of US $600 million for both warm and cold water r species. 90% of the yield comes from the warm water fisheries of the south east United States and the Gulf of Mexico but, even so, these fisheries cannot satisfy demand and an equal e quantity has to be imported. This situation gives rise to the dangerous scenario which confronts so many of the world's commercial fisheries today - in these demand leads to exploitation of fishing grounds with the constant danger of overfishing and stock mismanagement. In this major new reference, three experts each with over 3O year's experience in fisheries research and management (with particular emphasis on shrimp), review all aspects of shrimp capture, culture, research and management in the United States - the principles and practices of which are applicable to the shrimp fisheries of the world. The book covers, in detail, the history, biology, diseases, environmental factors, vessels, gear, fishing techniques, economic problems and opportunities affecting commercial shrimping for food, bad and sport.
Whilst considerable research has been undertaken by state and federal laboratories and by the shrimp industry Rseff and the results of research have been published diversely, no single source of consolidated, modern information on this important subject has been available until now. The authors have each been involved in shrimp biology, fisheries and research and have published numerous papers on these subjects for the past 30 years. Considerable interest in shrimp fishing and farming as the demand for shrimp continues to climb. All aspects of shrimp capture and culture fisheries are discussed and well illustrated. Shrimp are the most economically important aquaculture crop, throughout tropical and sub-tropical regions of the world. Practice and principles of shrimp fishing and fisheries management, as set out in this book, are of interest to fisheries in other countries.