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No Thumbnail AvailableProjectPearl oyster farming and pearl culture
Regional Seafarming Development and Demonstration Project
1991Also available in:
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. -
Book (series)Pearl oyster health management: a manual. 2007
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No results found.The pearl oyster industry is a growing multibillion dollar sector of molluscan aquaculture. The end product of pearl farming, the pearl, is unique to this sector. Pearl production is entirely based upon health. The pearl itself is a product of the oyster’s immune defences as a response to soft-tissue irritation. Today, most disease problems are caused by opportunistic pathogens taking advantage of oysters weakened by the stress of handling, including pearl surgery and sub-optimal growi ng conditions. Further development of the industry will inevitably lead to increased risk of disease introduction, spread or emergence. Against such an unwanted future, health management is the critical line of defence. This publication provides guidance on the management of pearl oyster health and reviews pearl oyster mortalities and disease problems that will be useful for designing programmes aimed at reducing the risks from diseases. Part 1 consists of pearl oyster health – the c urrent interest in it and an overview of the cultured marine pearl industry. Part 2 examines pearl oyster health management and consists of seven sections, namely: (a) introduction; (b) general information on husbandry and handling, hatchery production, introductions and transfers; (c) disease diagnostic protocols dealing with field collections of samples, gross external examination, gross internal examination and laboratory protocols; (d) health zonation; (e) disease outbreak protocol s; (f) national strategies on aquatic animal health; and (g) references. Certain countries in the pearl oyster producing regions have acquired a great deal of experience in health management of cultured species. Experiences from Australia, the Cook Islands, Japan, French Polynesia, the Philippines, China, the Persian Gulf and the Red Sea are included in Part 3 which also contains a general review of pearl oyster mortalities and disease problems. -
ProjectGiant Clams in the Maldives- A Stock Assessment and Study of Their Potential for Culture-BOBP/WP/72 1991
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No results found.Tuna fishing is the major fisheries activity in the Maldives. However, fishing for nontraditional organisms is becoming popular, as it provides fishermen with new areas of employment or alternatives when tuna fishing is poor. One non-traditional fishery in the Maldives is that for giant clam. This fishery is only a year old, but so considerably has the resourcebeen exploited that different non-fishery professionals — tourist resort owners, divers and, of course, environmentalists — have alread y shown great concern about its long term effects. It was this concern that led to the Ministry of Fisheries and Agriculture undertaking an assessment of the status of giant clams in the Maldives through their Reef Fish Research and Resources Survey Project (RAS/88/007). The assessment was executed by the Food and Agriculture Organization of the United Nations through the Bay of Bengal Programme, with funding from the United Nations Development Programme. This paper is based on the report su bmitted by the consultant to the Government of Maldives in April 1991 and describes the findings of the assessment and discusses the possibility of developing a viable mariculture project to ensure a continued existence of the giant clam in the Maldives. The author wishes to thank all the team at the Marine Research Section of the Ministry of Fisheries, particularly Maizan Hassan Maniku and Charles Allism, for their detailed backgound information, Hassan Shakeel of MRS, for putting up with man y questions and providing logistic assistance, Bill Allison for field assistance in counting of clams and John Lucas for helpful comments on the final report.
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