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No Thumbnail AvailableProjectTechnical guidance on pearl hatchery development in the Kingdom of Tonga 1999
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No results found.The designations employed and the presentations of material in this publication do not imply the impression of any opinion whatsoever on the part of the Food and Organization of the United Nations concerning the legal or constitutional status of any country, territory, city or area or its authorities, or concerning the delimitation of its frontiers or boundaries. The Food and Agriculture Organization is greatly indebted to the organizations and individuals who assisted in the implementation of the project by providing information, advice and facilities. -
No Thumbnail AvailableProjectPotential for Eucheuma "cottonii" seaweed farming in the Kingdom of Tonga 1999
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No results found.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. -
No Thumbnail AvailableProjectPearl oyster farming and pearl culture
Regional Seafarming Development and Demonstration Project
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No results found.Pearls, one of the highly esteemed gems, are very valuable due to the high demand and prices for them. Several countries bordering the Indian and Pacific Oceans and some countries along the Eastern Atlantic Ocean have pearl oyster resources. Many of these countries, particularly those in Asia, are very much interested in pearl oyster farming and pearl culture. Japan stands foremost in the two fields having developed technologies and innovations in the field. The techniques of pearl oyster farm ing and pearl culture are not widely known. There is a need to promote more widely the techniques and relevant information on the bionomics of pearl oysters. In India, interest in pearl culture began at the start of this century. Several studies have been conducted by the Madras Fisheries Department in the 1930s. In 1972, the Central Marine Fisheries Research Institute (CMFRI) took up intensive research on pearl culture at Tuticorin achieving a breakthrough in July 1973 when it produced free s pherical cultured pearls by employing the mantle graft implementation technique. Since then intensive research has been carried out by the Institute on pearl formation, pearl oyster biology and ecology, and hatchery techniques for production of pearl oyster seed. Considerable information of applied value has been obtained. The development of the pearl oyster hatchery technology in India in 1981 opened the way for large and commercial scale culture of this bivalve species. Based on the technica l know-how provided by the CMFRI, a company has been established at Tuticorin to produce cultured pearls.
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