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No Thumbnail AvailableBook (series)Case studies of the management of elasmobranch fisheries. Part 2 1999
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No results found.This report, consisting of 29 studies, describes the relevant population biology, resource analyses and fishery management of elasmobranchs at regional, national and sub-regional levels - in Atlantic Europe, the United States, the Caribbean, Guatemala, South Africa, Uruguay, the Falkland Islands, the Seychelles, two states in India, the Maldives, Malaysia, Australia, New Zealand, Japan, Fiji and Ecuador. Regional accounts are also presented of the management of Galeorhinus galeus in different na tional fisheries, management of deepwater shark populations and management of elasmobranchs within the context of a regional tuna fisheries commission. A description of the activities of Non-governmental Organizations in relation to elasmobranchs is given and an account of the quality of the reported elasmobranchs landings data available in theFAO Nominal Catcjes amd Landings Data Base. In general, the case studies cover the topics of the resource (species composition of fishery, distribution of fishery and associated species either as bycatch or discards) and development and current status of the means of prosecuting the fishery and the harvesting process. The evolution of the catch, fleet and fishing effort are also given. In terms of commerce, fishery markets and revenues from the fishery are discribed where possible together with comments of the economics of the fishery and information relating to the fisheries workforce. In relation to fisheries administration, management ob jectives and national fisheries policies are described, in particular, any that exist for elasmobranch fisheries, and the manner in which the planning process functions. Where applicable, the objective setting process, the stakeholders in the process and how the negotiations are handled are described. Who may fish and how access is granted and controlled is noted, its cost, and the nature of fishery property rights, if any. If there are gear restrictions, their nature and effectiveness is descri bed together with any regulations on vessel characteristics. Likewise, where regulations exist (on catch, closed seasons, effort limitations, or other) they are described. The authors further provide a descriptive and critical review of the policy setting process in relation to the elasmobranch fisheries, its successes, ongoing and unresolved problems and the nature of their weaknesses. Where there is an annual operational management planning process, the provision of resource management advi ce together with a description of national departments involved in this process are described. Descriptions are given of the management support activities, e.g., the methods used for collection of catch and effort data together with evaluations of the process and its problems. Several of the papers discuss stock assessment activities including reviews of the process. Many accounts complement this with descriptions and analyses of the biological advice review process and comments on the sustainab ility of the resource. National accounts also describe the relevant law and enforcement process. Finally there are descriptions of the extent of management success, e.g. the profitability of the fishery and the social welfare implicatoins of the management objectives and policies. Where possible, the costs of management are given. The report consists of two parts. The first part contains the analyses for the fisheries in the Atlantic and Indian Oceans, Malaysia and northern Australia. The sec ond part contains the case studies for Southern Australia and the Pacific Ocean, the regional accounts and the descriptions of the activities of NGOs and quality of reported landings data. -
Book (series)Management techniques for elasmobranch fisheries. 2005
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No results found.This publication describes the scientific principles and techniques used for resource management of elasmobranch fisheries with emphasis on the particular context of elasmobranchs. The management characteristics of these fishes are described – their common bycatch character and their biological constraints on productivity (low growth rate, late maturity and low fecundity). Stock assessment of elasmobranchs is described in the context of management objectives in a wide management contex t. Special attention is given to accurate species identification given the prevalent aggregating of landings data across species, genera and often families in this group. Techniques and experiences for tagging elasmobranchs for population estimation are described as well as methods of genetic techniques for stock identification. Methods and problems involved in determining age, growth, fecundity and mortality rates are described and their use in age-structured models within the conte xt of the reproductive biology of these fishes. Demographic models to determine the productivity of elasmobranch resources are described. Use of surveys to complement information derived from fisheries is described together with management measures. Last, practices of shark utilization are noted. -
No Thumbnail AvailableBook (series)Status of Interactions of Pacific Tuna Fisheries in 1995
Proceeding of the Second FAO Expert Consultation on Interactions of Pacific Tuna Fisheries Shimizu, Japan 23 to 31 January 1995
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No results found.This publication includes forty papers and two abstracts of papers presented at the Second FAO Expert Consultation on Pacific Tuna Fisheries held in Shimizu, Japan, from 23 to 31 January 1995. The topics of the papers include: · reviews of tuna fisheries interactions and their research including methods for their study, · new methods for studying tuna fisheries interactions and examination of their applicability, · case studies on tuna fisheries interactions, · analyses of tuna fisheri es involved in interactions and their management, and · an overview of FAO’s project that co-organized and co-sponsored the Consultation. A supplement of an indexed bibliography of papers on tuna and billfish tagging, which was printed separately, is also included. The objectives of the Consultation were to: · review and integrate the outcome of the studies on tuna fisheries interactions, · summarize the extent of tuna fisheries interactions and unresolved research problems, and · fo rmulate guidelines for research on tuna fisheries interactions. The understanding of tuna fisheries interactions was enhanced significantly by recent studies. However, the Consultation noted that the number of quantified interactions is still small due primarily to difficulties associated with evaluating such interactions. The papers providing supporting information for the conclusions of the Consultation are presented in this publication. Interactions were found to vary in significance depend ing on the biological characteristics of the species involved, the sizes of fish caught, the local and stock-wide rates of exploitation, and the distance among fisheries. In many of the studies presented, the inadequacy of fisheries data was stressed. In addition, the lack of understanding of movements of the fish being studied was noted in several papers. General qualitative guidelines presented in several discussion papers stressed that specifically-designed studies be undertaken to adequately quantify interactions. Well-designed tagging experiments were thought to provide the most reliable information about interactions. Guidelines for the collection of data, biological and ecosystem research, modelling, and alternative methodologies for studying tuna fisheries interactions are also included.
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