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South China Sea fisheries development and coordinating programme. Report on second regional consultancy low-cost water filtration, Regional








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    South China Sea fisheries development and coordinating programme. Low-cost water filtration system for fish farms, fish markets and village drinking water supplies, Regional 1979
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    The report describes the situations and problems related to water quality at marine, brackish and freshwater sites in Indonesia, the Philippines and Malaysia. The Consultant investigated each site and where possible, demonstrated the use of the SWS system, using box units and steel screen wells. The results of each test are given along with detailed advice on the installation and maintenance of permanent systems. Further technical data is supplied in the Appendices along with general description s of the equipment and its applications. The format of the report is as follows: After a brief itinerary, there is a day-by-day account of the stations visited, specific problems discussed and practical work undertaken. For each of the territories, there is a comment on the general application of sub-sand abstraction and filtration principles and on factors which affect them. A series of Appendices lists detailed procedures suggested for solving the various problems. These are treated in t his way so that copies of relevant sheets can be forwarded to individual stations for action. It is hoped that the officials dealing with these problems will write for further advice if this would be helpful.
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    South China Sea fisheries development and coordinating programme. Low-cost water filtration system for fish farms, fish markets and village drinking water supplies, Regional 1979
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    The participating countries of the South China Sea Fisheries Development and Coordinating Programme, including Hong Kong, Indonesia, Khmer, Malaysia, the Philippines, Singapore, Thailand and Vietnam, have a long-standing tradition of fairly common coastal aquaculture practices, due largely to related socio-cultural characteristics, similar climatic and land-sea resources, and the prevaience in the area of the same or related species of fishery resources suitable for culture. 2. Altogether the developed aquaculture areas in these countries are estimated at 430 000 hectares, producing annually about 200 000 tons of finfish and shrimps, 10 000 tons of shrimps and prawns, and 30 000 tons of cockles, oysters, mussels and others. 3. Since the management method in this area is generally extensive rearing of fish in ponds and pens or cages, and in open water for molluscs and seaweeds, production is low; the annual yields are about 500 kg/ha for finfish and 350 for shrimps and prawns.
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    South China Sea fisheries development and coordinating programme. Engineering aspects of brackish water aquaculture in the south China Sea region, Indonesia, Malaysia, Philippines, Singapore, Thailand, Hong Kong 1975
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    . Present state. It can be said that the engineering aspect of brackish water aquaculture industry in the region has attained a level commensurate with the present capabilities of the countries where it is now practiced. In general, as a physical unit, existing projects are hardly adequate. Aquaculture farm engineering as an art (as perhaps at this stage it is more of an art than a technology) has been a product of long development and experience by the people in the industry themselves or witho ut the contribution from organized research. It is only within very recent years that a limited amount of attention is being called to the importance of this phase of the industry. 2. Manpower and equipment. Due to the circumstances cited above the industry has not been utilizing much of labour-saving or mechanized equipment both for operation and construction. At present the industry is largely labour-intensive and depends on simple locally-devised equipment which have been developed through the years. Likewise the specialized manpower for construction and maintenance is localized and often very limited so that in many potential focal points of development this can be a major constraint. 3. Projects as engineering units. The physical make-up of brackish water aquaculture projects in the region are in general weak and inadequate as engineering structures, many of them are not geared to the production management for which they are established. For extensive type production in many d eveloping areas of the region, present projects have served for the conduct of subsistence level operation where constant maintenance is being carried out. However, to maximize production; project design, proper layout and adequate construction specifications, etc. are required.

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