Author: Daniel Pauly
Publisher: WorldFish
ISBN: 9710400223
Category : Fishery management
Languages : en
Pages : 355

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Author: Bridget S. Green
Publisher: Springer Science & Business Media
ISBN: 140205775X
Category : Science
Languages : en
Pages : 313

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Book Description
Techniques and theory for processing otoliths from tropical marine fish have developed only recently due to an historic misconception that these organisms could not be aged. Otoliths are the most commonly used structures from which daily, seasonal or annual records of a fish’s environmental history are inferred, and are also used as indicators of migration patterns, home range, spatial distribution, stock structure and life history events. A large proportion of projects undertaken on tropical marine organisms involve removal and processing of calcified structures such as otoliths, statoliths or vertebrae to retrieve biological, biochemical or genetic information. Current techniques and principles have evolved rapidly and are under constant modification and these differ among laboratories, and more particularly among species and within life history stages. Tropical fish otoliths: Information for assessment, management and ecology is a comprehensive description of the current status of knowledge about otoliths in the tropics. This book has contributions from leading experts in the field, encompassing a tropical perspective on daily and annual ageing in fish and invertebrates, microchemistry, interpreting otolith microstructure and using it to back-calculate life history events, and includes a treatise on the significance of validating periodicity in otoliths.

Author: Silvestre, G. et al
Publisher: WorldFish
ISBN: 9832346223
Category : Fisheries
Languages : en
Pages : 1076

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Book Description
In Asia, the fisheries sector is important in terms of food security, livelihoods and foreign exchange earnings. However, as in many parts of the world, there are signs that capture fisheries are fully exploited or overfished. Management of fisheries in the region is often hampered by lack of information on the status of fisheries in terms of biological, social, economic, policy and governance aspects. This regional project documents an alarming decline on coastal fishery resources, based on historic research surveys in South and Southeast Asia. Socio-economic analyses and policy reviews highlight the importance of the fisheries sector but also the challenges facing it. Potential interventions to improve fisheries management in the countries are outlined and defined with environmental, socioeconomic and institutional objectives.

Author:
Publisher:
ISBN:
Category : Fish culture
Languages : en
Pages : 478

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Book Description

Author: J. C. Seijo
Publisher: Food & Agriculture Org.
ISBN: 9789251040454
Category : Biology, Economic
Languages : en
Pages : 128

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Book Description
This book is presented in seven Chapters. Chapter 1 describes the basic assumptions underlying the optimal allocation of natural resources and the inherent characteristics of fisheries that determine, under unrestricted access, the failure to allocate resources, economic inefficiency and overfishing. To mitigate these undesired effects, the bioeconomic literature invokes the allocation of property rights, which in turn must be implemented within a management context. Thus, in this Chapter we suggest some guidelines to conduct management plans. Static and dynamic bioeconomic models are presented in Chapter 2 as a theoretical framework for the design of intelligent management schemes aiming at sustainable use of fish stocks. Classic models are shown, such as the Gordon-Schaefer based on the logistic. We also develop new bioeconomic approaches, such as a distributed-delay model to add realism to Smith's fleet dynamics approach. Chapter 2 also includes an introductory version of a bioeconomic yield-mortality model, and dynamic age-structured models. A comparison of the dynamic and static trajectories is stressed. The price of time and its implications for optimal resource allocation over time is also discussed. For the sake of adding realism to the above models, the systems approach is used in Chapter 3 to model different technological and ecological complexities that occur in marine fisheries. Ecological interdependencies (competition, predation), as well as technological interdependencies resulting from fleets with different fishing power and/or gear types, operating on components of a stock, or on different target species of a "mixed stock", are specified and modelled.

Author: Andrew Wright
Publisher: [email protected]
ISBN: 9789820200821
Category : Fishery management
Languages : en
Pages : 730

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Book Description

Author: Ian R. Smith
Publisher: WorldFish
ISBN: 9711022087
Category : Fisheries
Languages : en
Pages : 99

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Book Description

Author: Daniel Pauly
Publisher: WorldFish
ISBN: 9711022281
Category : Fisheries
Languages : en
Pages : 463

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Book Description
Specific aims of the conference were: to identify the specific features of sampling schemes used to obtain length-frequency data for stock assessment; to review length-based methodologies for stock assessment of fish and aquatic invertebrates, with particular reference to their precision and accuracy; to review and test computer programs implementing length-based methods.

Author: James R. Coull
Publisher: Routledge
ISBN: 1134903677
Category : Business & Economics
Languages : en
Pages : 288

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Book Description
This provides a comprehensive and up-to-date review of how this commodity is used, examining the various aspects of fishing resources from their biological basis through to marketing and consumption.

Author: Indo-Pacific Fishery Commission. Standing Committee on Resources Research and Development. Session
Publisher: Food & Agriculture Org.
ISBN: 9789251032329
Category : Business & Economics
Languages : en
Pages : 228

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Book Description