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Technical guidance on pearl hatchery development in the Kingdom of Tonga









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    Potential for Eucheuma "cottonii" seaweed farming in the Kingdom of Tonga 1999
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    The detailed results from earlier attempts to develop a cottonii farming industry in the Kingdom of Tonga strongly suggest that there is no potential for this activity in the northern island groups of Vava'u and Ha'apai. In Vava'u further trials by Fisheries Division using the hanging long-line method of farming are recommended. This method is untried in Tonga, and may solve the problem of the seasonal destruction of farm stocks by juvenile rabbit fish, which previously prohibited any signific ant commercial farming. Trial results should also be used to determine the economics of long-line farming in Vava'u. The west coasts of Ha'apai islands are generally considered too wave-exposed to justify any new long-line farming trials. Further trials with the off-bottom constant-depth method are possible in the Lifuka Group, but rabbit fish grazing is predicted to be a significant problem. A Fisheries Division farming trial using the off-bottom method is recommended for Niuatoputapu Islan d in the far north. The impact of herbivorous fish is unknown on this island, and it may be considerably less than that in Vava'u and Ha'apai. The long-term survival and growth of cottonii in the Tongatapu lagoon indicates that there may be potential for a small export industry based on production from the coastal villages in the Nukuleka to Navutoka region, at the entrance to the lagoon. Commercially viable farming on Tongatapu can only properly be assessed by starting some family-owned and o perated farms, and monitoring yields and financial returns for effort. The motivation of people to engage in farming is difficult to predict. However, a conservative farmer price of T$ 0.38 per kg. is recommended, based on estimated trading costs and current world market export prices.
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    A regional shellfish hatchery for the Wider Caribbean - Assessing its feasibility and sustainability
    FAO Regional Technical Workshop 18-21 October 2010, Kingston, Jamaica
    2011
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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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