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A manual for the processing of agar from Gracilaria







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    Training manual on Gracilaria culture and seaweed processing in China
    Regional Seafarming Development and Demonstration Project
    1990
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    Gracilaria is a group of warm water seaweeds. There are more than one hundred species in the world, some of which have very important economic value. Gracilaria is used as food and in the preparation of food products. It is also an important raw material in agar-agar production. At present, the world's annual output of Gracilaria is about 30,000 tons, dry weight, most of which comes from natural production. For example, the natural production in Chile, Argentina, and Brazil accounts for one thir d of this total output. With the increasing demand for Gracilaria, greater attention has been focused on the development of its artificial culture by many countries, especially those in Southeast Asia. China is the earliest country that artificially cultured Gracilaria. Today, the culture area in South China is about 2,000 ha producing 3,000 tons dried material annually. Taiwan produces 1,000 tons dried Gracilaria yearly from 400 hectares under cultivation. Nowadays, Gracilaria is cultured mai nly using the following methods: bottom culture, raft culture, stake-rope culture and pond culture. Pond culture can be divided into two systems, monoculture and polyculture with shrimp and other species. The varieties of culture methods can be adapted for different areas. In view of the importance of Gracilaria as a seafarming commodity, the National Coordinators of the Regional Seafarming Project recommended the dissemination of its culture and processing technology, through a regional train ing and demonstration activity, as a means to further increase the opportunities to develop the seafarming industry of the region. This manual has been prepared for the training course on Gracilaria culture under the Regional Seafarming Development and Demonstration Project (RAS/90/002) to be held at Zhanjiang Fisheries College, Zhanjiang, China in August, 1990.
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    Gracilaria Production and Utilization in the Bay of Bengal Region - BOBP/REP/45
    Songkhla, Thailand, 23-27 October 1989
    1990
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    This report summarizes the proceedings of an international seminar on Gracilaria production and utilization in the Bay of Bengal, held in Songkhla. Thailand. 23-27 October 1989. It also includes 23 papers presented at the seminar by participants from various countries. A bibliography on Gracilaria, which was prepared in connection with the seminar, is being published separately. The seminar was held to review current status of knowledge on the subject worldwide and to help point future work directions. The seminar and the report on it were jointly sponsored by two projects of the Bay of Bengal Programme (BOBP)-the Small-Scale Fisherfolk Communities Project and the Post-Harvest Fisheries Project. The Small-Scale Fisherfolk Communities Project of the Bay of Bengal Programme began in 1987 for a duration of five years. It is funded by SIDA (Swedish International Development Authority) and DANIDA (Danish International Development Authority). Its main aim is to develop, demons trate and promote technologies and methodologies to improve the conditions of fisherfolk in seven countries bordering the Bay of Bengal-Bangladesh, India, Indonesia, Malaysia, Maldives, Sri Lanka and Thailand. The Post-Harvest Fisheries Project is executed and funded by the ODA (Overseas Development Administration of the United Kingdom).

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