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Installation and operation of a modular bivalve hatchery. (Printed version contains CD-ROM)













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Sarkis, S.; Lovatelli, A. (comp./ed.)Installation and operation of a modular bivalve hatchery.FAO Fisheries Technical Paper. No. 492. Rome, FAO. 2007. 173p. 


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    It is widely recognized that the development of aquaculture in the Wider Caribbean region is inhibited, in part, by the lack of technical expertise, infrastructure, capital investment and human resources. Furthermore, seed supply for native species relies, for the most part, on natural collection, subject to natural population abundance with wide yearly variations. This situation has led to the current trend of culturing more readily available exotic species, but with a potentially undesirable i mpact on the natural environment. The centralizing of resources available in the region into a shared facility has been recommended by several expert meetings over the past 20 years. The establishment of a regional hatchery facility, supporting sustainable aquaculture through the seed production of native molluscan species was discussed at the FAO workshop ¿Regional shellfish hatchery: A feasibility study¿ held in New Kingston, Jamaica, in October 2010, by representatives of Caribbean government s and experts in the field. Molluscan species are particularly targeted due to their culture potential in terms of known techniques, simple grow-out technology and low impact on surrounding environment. It is proposed that a regional molluscan hatchery would produce seed for sale and distribution to grow-out operations in the region as well as provide technical support for the research on new species. The current document summarizes the findings of the workshop and outlines four follow-up recomm endations on steps required for the successful implementation of a regional facility. The positive response of participating Caribbean governments demonstrates the current political will for sustainable aquaculture growth in the region, supported by several national plans including the Caribbean Regional Fisheries Mechanism Strategic Plan.
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    Bivalve mollusc culture is an important and rapidly expanding sector of world aquaculture production, representing approximately 20% of this output at 14 million tonnes in 2000. The majority of production is from natural populations although increasingly stocks are approaching or have exceeded maximum sustainable yields. Enhancement of stocks through the capture and relaying of natural seed in both extensive and intensive forms of culture is common practice worldwide but the reliability of natur al recruitment can never be guaranteed and conflicts over the use of the coastal zone are becoming ever more pressing. A solution to meeting the seed requirements of the bivalve industry, applicable to the production of high unit value species such as clams, oysters and scallops, is hatchery culture. The production of seed through hatchery propagation accounts at the present time for only a small percentage of the total seed requirement but it is likely to become increasingly important as work continues to produce genetically selected strains with desirable characteristics suited to particular conditions. The advent of bivalve hatcheries was in the 1960s in Europe and the U.S. Since those early pioneering days knowledge of the biological requirements of the various species that predominate in worldwide aquaculture production and the technology by which to produce them has and continues to improve. This manual brings together the current state of knowledge in describing the v arious aspects of hatchery culture and production from acquisition of broodstock to the stage at which the seed are of sufficient size to transfer to sea-based growout. Focus is on intensive methodology in purpose built hatchery facilities rather than on more extensive methods of seed production in land-based pond systems. This manual is not intended as a scientific treatise on the subject. Rather, it is practical in nature providing the reader with an insight into what is required in the w ay of resources and details of how to handle and manage the various life history stages of bivalves in the hatchery production cycle.
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    The objective of this document is to illustrate the ways in which Geographic Information Systems, remote sensing and mapping can play a role in the development and management of marine aquaculture. The perspective is global. The approach is to employ example applications that have been aimed at resolving many of the important issues in marine aquaculture. The underlying purpose is to stimulate the interest of individuals in the government, industry and educational sectors of marine aquacul ture to make more effective use of these tools. A brief introduction to spatial tools and their use in the marine fisheries sector precedes the example applications. The most recent applications have been selected to be indicative of the state of the art, allowing readers to make their own assessments of the benefits and limitations of use of these tools in their own disciplines. The applications are organized issue-wise along the main streams of marine aquaculture: culture of fishes in cag es, culture of shellfishes and culture of marine plants. A case study is included that illustrates how freely downloadable data can be used to estimate marine aquaculture potential. Because the ultimate purpose of GIS is to aid decision-making, a section on decision support tools is included.

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