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No Thumbnail AvailableProjectTraining manual on Gracilaria culture and seaweed processing in China
Regional Seafarming Development and Demonstration Project
1990Also available in:
No results found.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. -
No Thumbnail AvailableProjectSite selection for Eucheuma spp. farming
Regional Seafarming Development and Demonstration Project
1990Also available in:
No results found.Seaweed are important raw materials in the manufacture of phytocolloids like alginates, agar, and carrageenan which are used in food production, pharmaceuticals and other industrial products. Carrageenan is used in a wide variety of food products as a gelling agent, viscosity builder and stabilizing and emulsifying agent. For example in dairy products such as ice cream, sherbets, chocolates, custards, cake topping and fillings, milk shakes, yoghurts, and liquid products including beers, desser t gel, canned foods, fish gel, and sauces. Non-food products include surgical jellies, lotions and ointment, toothpastes, paints, shampoos, medicinals and artificial food for fishes. The major seaweed used for the production of carrageenan are of the genera Chondrus, Gigartina (temperate species), Eucheuma and Hypnea (tropical species). At present Eucheuma farming is widely practiced among artisanal fishermen in the Philippines, Indonesia and Fiji. It is one of the seafarming commodities that require low capital investment and has a rapid rate of return. The farming of Eucheuma is a way of improving family income of the village fishermen. It also creates employment opportunities especially in the rural areas, and can promote the expansion of industrial production based on locally available, renewable raw materials, and increase in foreign exchange earnings through export of these raw materials and/or industrial products derived from them. These make seaweed farming important to rural development in the Asia-Pacific region. -
Brochure, flyer, fact-sheetThe rediscovered potential of seaweed dietary additives 2022
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No results found.The cellular structure of seaweeds comprises indigestible fibres or complex polysaccharides, which are used as thickening additives or gelling agents in a range of processed foods and in cosmetics, pharmaceuticals, nutraceuticals and other industries. To date, only a handful of seaweed species have been used commercially as animal feed additives. Two main reasons underpin the use of seaweeds as dietary additives are to bolster the immune system of farmed animals and to improve their productivity and meat quality. Southeast Asia could play a significant role in the production of tropical seaweeds for animal feeds. Due to the vast number of seaweed species, novel seaweed additives, with the potential for animal production, are being discovered.
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