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No Thumbnail AvailableProjectCulture of the Pacific oyster (Crassostrea gigas) in the Republic of Korea
Regional Seafarming Development and Demonstration Project
1989Also available in:
No results found.Oyster is consumed worldwide. It is a delightful and nutritious food taken in a variety of forms: fresh, frozen, canned and dried as well as juice. By popularizing the hanging culture method since the early 1960s, the culture practices appropriate to a region have been gradually evolved and established. At present, most of the oyster production comes from long-line culture. In Korea, the Pacific Oyster (C. gigas Korean kang-gul (C. rivularis), Korean pawit-gul (C. nippona), spiny oyster (C. ec hinata) and the densely lamellated oyster (C. denselamellosa) are grown. Among these, the Pacific oyster is the main species for commercial farming. In 1986, the Korean oyster culture industry showed there were 10,736 hectares of licensed growing water and a production of 255,000 metric tons shell-on, or a per-hectare yield of about 23.75 metric tons. Oyster production was 25 to 30 percent of total mariculture output in the 1980s, compared to 50 to 60 percent in the 1960s. Most of the processe d Oysters and some of the fresh produce are exported to North America, Japan, Southeast Asia, Middle East and other countries. The purpose of this Manual is to extend the technology of oyster culture to farmers and extension workers. It covers the biology, theory and practice of oyster culture, and the findings from applied research and field studies. It also includes processing. -
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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.
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