Modern North American sturgeons and paddlefish are the result of 100 million years of evolution. Once an integral part of aboriginal culture, their numbers were decimated by overfishing and habitat destruction during the past two centuries.
This book details the extensive science aimed at helping these remarkable species recover from the brink of extinction, and describes the historical, biological, and ecological importance of North American sturgeon and paddlefish. The text is enhanced by photographs and detailed line drawings.
This comprehensive volume will be an...
Modern North American sturgeons and paddlefish are the result of 100 million years of evolution. Once an integral part of aboriginal culture, their...
Pike and related fish form an important part of aquatic ecosystems and are also commercially very valuable. This title provides full coverage of the biology, ecology and exploitation of this important group of fish and will be invaluable for fisheries scientists, fish biologists, aquatic scientists, ecologists and environmental scientists.
Pike and related fish form an important part of aquatic ecosystems and are also commercially very valuable. This title provides full coverage of the b...
Sturgeons are considered living fossils, sharing many morphological and biological features with ancestral fish. Furthermore, sturgeons are of the utmost interest from an economic perspective, not only for the caviar but for the flesh. However, the wild populations of the majority of the species are at serious risk of extinction all over the world. So, it is urgent to develop strategies for both farming culture and conservation and recovery in natural habitats.
This book provides a comprehensive view of the biology and sustainable development of sturgeons putting emphasis on the...
Sturgeons are considered living fossils, sharing many morphological and biological features with ancestral fish. Furthermore, sturgeons are of the ...
Destruction of habitat is the major cause for loss of biodiversity including variation in life history and habitat ecology. Each species and population adapts to its environment, adaptations visible in morphology, ecology, behaviour, physiology and genetics. Here, the authors present the population ecology of Atlantic salmon and brown trout and how it is influenced by the environment in terms of growth, migration, spawning and recruitment. Salmonids appeared as freshwater fish some 50 million years ago. Atlantic salmon and brown trout evolved in the Atlantic basin, Atlantic salmon in North...
Destruction of habitat is the major cause for loss of biodiversity including variation in life history and habitat ecology. Each species and popula...
Freshwater eels are almost infinitely improbable creatures. They spawn and die in the middle of the ocean, often associated with undersea mountains. Their tra- parent, leaf-like larvae move with ocean currents for months or years until they approach the mouths of freshwater rivers. Then they undergo a dramatic transf- mation in morphology, physiology and behavior. They move from their planktonic oceanic environment, migrate upstream and live for several years as apex fre- water predators. Then, almost impossibly, as they become sexually mature, they reverse their migration downstream to the...
Freshwater eels are almost infinitely improbable creatures. They spawn and die in the middle of the ocean, often associated with undersea mountains. T...
Modern acoustic instruments, sophisticated displays and microprocessor-based signal processing are in constant use throughout the world to map the distribution of fish, estimate biomass, locate fish shoals, monitor fish movement and study fish behaviour. The use of underwater sound in this way is hence an extremely important tool for the study of fish for research purposes and in commercial fisheries.
Modern acoustic instruments, sophisticated displays and microprocessor-based signal processing are in constant use throughout the world to map the dis...
Fisheries science in North America is changing in response to a changing climate, new technologies, an ecosystem approach to management and new thinking about the processes affecting stock and recruitment. Authors of the 34 chapters review the science in their particular fields and use their experience to develop informed opinions about the future. Everyone associated with fish, fisheries and fisheries management will find material that will stimulate their thinking about the future. Readers will be impressed with the potential for new discoveries, but disturbed by how much needs to be done...
Fisheries science in North America is changing in response to a changing climate, new technologies, an ecosystem approach to management and new thinki...
Japan is one of the world's largest fish-eating countries with a long history, and has developed its own customs and values in terms of managing fisheries resources. The first half of this book introduces the history and institutional features of capture fisheries management in Japan, with 9 case studies from sub-arctic to tropical ecosystems, from sedentary to migratory species, and from small-scale coastal to offshore industrial fisheries. For example, coastal fisheries management is more community-based, and local people have the authority and take priority in the decision-making...
Japan is one of the world's largest fish-eating countries with a long history, and has developed its own customs and values in terms of managing fi...
Reef fish spawning aggregations, ranging from small groups to many tens of thousands of individuals, are spectacular but poorly known natural phenomena whereby fish assemble at specific times and locations to spawn. For some species these large groups may be the only form of reproduction, the high fish numbers briefly giving a false impression of stability and abundance-an 'illusion of plenty'. They are often a focus for intensive seasonal fishing because of their predictability and because many important commercial fishes form them. Highly vulnerable to overexploitation, many aggregations...
Reef fish spawning aggregations, ranging from small groups to many tens of thousands of individuals, are spectacular but poorly known natural pheno...
Many of the processes influencing recruitment to an adult fish population or entry into a fishery occur very early in life. The variations in life histories and behaviours of young fish and the selective processes operating on this variation ultimately determine the identities and abundance of survivors. This important volume brings together contributions from many of the world's leading researchers from the field of fish ecology. The book focuses on three major themes of pressing importance in the analysis of the role that the early life history of fishes plays in the number and...
Many of the processes influencing recruitment to an adult fish population or entry into a fishery occur very early in life. The variations in life his...
