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Research and Engineering Appropriate BRDs for developing the Eco-friendly Trawl Net in Indonesia. Final Report.







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    Book (series)
    Report of the Workshop of National Coordinators of the UNEP/GEF/FAO Project on Reducing the Impact of Tropical Shrimp Trawling Fisheries on Living Marine Resources Through the Adoption of Environmentally Friendly Techniques and Practices.
    Rome, Italy, 17-19 March 1999
    1999
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    To initiate the preparatory phase of a UNEP/GEF/FAO project aimed at reducing the impact of tropical shrimp trawling fisheries on living marine resources through the adoption of environmentally friendly techniques and practices a Workshop was organized by FAO at their Headquarters in Rome from 17 to 19 March 1999. This report summarizes the outcome of this Workshop which was attended by FAO staff and 12 National Coordinators. The National Coordinators from 12 counties: Bahrain, Bangladesh, Camer oon, Columbia, Costa Rica, Cuba, Indonesia, Nigeria, the Philippines, Tanzania, Trinidad and Tobago, Venezuela, had been appointed by their respective governments. The workshop reviewed the situation with regard to problems associated with shrimp exploitation as well as the multi-sectoral structure in place for consultation on such issues in each country. It was generally agreed that the present exploitation pattern for shrimp in most countries is non-sustainable, mainly because of capture of ju venile fish and overfishing. A priority issue, however, to be addressed and hopefully solved by such a project, is to reduce capture of juveniles of commercially important food fishes. It was recognized that any introduction of new environmentally friendly techniques and practices depends to a large extent on the acceptance by the fishing industry of any such devices, technologies or regulations. The participation of affected stakeholders should therefore be given priority in all the phases of p roject implementation. The workshop agreed on follow-up activities, which included preparation of detailed reports about the shrimp fisheries in each country, and venues for four regional workshops to be arranged in December 1999/January 2000.
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    Indonesia - Shrimp culture research. A report prepared for the brackishwater shrimp and milkfish culture applied research and training project 1979
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    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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