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No Thumbnail AvailableProjectThai freshwater prawn and brine shrimp farming. Report on a study of economics, marketing and processing requirements 1980
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No results found.Freshwater prawn (Macrobrachium rosenbergil) farming is a rapidly expanding industry in Thailand. The production of both post-larvae and marketable prawn increased about 80 percent between 1979 and 1980. Currently the industry consists of 59 hatcheries and at least 455 farms utilizing approximately 2,346 rai (375 hectares) of land. Current hatchery production exceeds 25 million post-larvae per year with a potential production of over 100 million. The total production of marketable prawn in 1980 is estimated to be about 350 tons with a total retail value of nearly 70 million Baht ($3.5 million). Thailand is already a leader in terms of total land used for freshwater prawn production including Hawaii. Since culture technology is not expected to be a limiting factor for expansion, the future development of this industry depends mainly on its economic viability and the market potential for locally produced prawn. The economic viability of this industry was evaluated mainly based on the d ata collected from a field survey. The production efficiency of both hatchery and grow–out farm operations in Thailand is relatively low. The productivity per unit of Artemia (the most important food for juvenile prawn) used in the hatchery is only about half that in Hawaii, and the production of marketable prawn per unit of pond area is only one-third. However, despite the low productivities, all of the hatcheries and farms interviewed are currently making a good profit mainly because of the re latively low cost of inputs and the prevailing high price of prawn. The average rate of return to initial investment is high for both hatchery and grow-out farm operations. In most cases, the initial investment can be paid off within the second year of operation. However, this situation will change if the production exceeds the demand resulting in a lower price for prawn and hence lower profit. -
No Thumbnail AvailableProjectResearches on marine finfish and shrimp farming
Establishment of a Network of Aquaculture Centres in Asia
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No results found.The Aquaculture Department of the Southeast Asian Fisheries Development Center (SEAFDEC) is one of the four regional lead centres participating in the regional activities of the Network of Aquaculture Centres in Asia (NACA) to carry out regional research, training and information activities. In formulating the research activities for the Regional Lead Centre in the Philippines (RLCP), FAO has assigned a task force to prepare viable research programme in consultation with the research leaders of the Centre. The task force also held a number of consultation with some of the leading fish pond operators, officers of the government and University. The programmes for the Regional Aquaculture Lead Centres in Asia is contained in the document ADCP/REF/80/14 (En.). The farming system selected for the Regional Lead Centre in the Philippines are (i) shrimp culture in ponds and (ii) pond culture of milkfish, mullet and other brackishwater finfish. However, because of limitation of funds, facilit ies and technical manpower, research will be concentrated on priority commodities of the country which also are of regional interest. While noting the effort of IDRC in establishing breeding and culture technology for milkfish, the Centre focuses its initial attention and effort on the farming of shrimp in brackishwater ponds and culture of other brackishwater finfish (seabass and grouper). The selection of shrimp is due to its high market value and its economic importance to the shrimp cultiv ated in the various tropical and sub-tropical Asian countries. The rapid decline of supply from the wild has led many countries to launch massive programmes to culture the species which has a lucrative export value. However, appropriate farming technology has not been fully developed resulting to frequent shortage of feed supply, poor harvest and in some cases collapse of production farms. -
No Thumbnail AvailableProjectIndonesia - Shrimp culture research. A report prepared for the brackishwater shrimp and milkfish culture applied research and training project 1979
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No results found.This report gives an account of penaeid shrimp culture development work including postlarval production, nursery rearing and pond culture. The postlarval culture method was established for Penaeus monodon and P. merguiensis using different types of culture vessels. The total number of postlarvae produced in 1975 was 580 300 and production has increased to over 4 million in 1977; this figure will be rapidly increased in 1978 from induced gonad maturation and spawning. The highest P. monodon postl arvae per brood in a 10 m3 tank was achieved by producing 375 000 with 73 percent survival, and 320 000 with 52 percent survival for P. merguiensis. Mass-culture systems of phytoplankton and rotifers were established for larval food organisms. The particulated soybean curd and rotifers were used for the larval diet to substitute for Artemia nauplii. Artemia will still be needed for a better survival rate. Various types of nursery methods were experimented on formulated diet and on natural food in ponds; the optimal nursery stocking densities were determined. A series of pond culture results indicated that interim fish extermination by using 7 ppm derris root extract was effective. The annual shrimp production in pond projected from preliminary results indicated that 600 kg per ha per year is possible, utilizing natural productivity with the fertilization but no feeding. This phase of the work needs to be repeated. Based on the experiments, recommendations are outlined for f urther work to increase production.
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