04424nas|a2200433 a 4500 20260818112748.0 071019s2006 th uu|m rtt 0| a1eng d .b11816430 AIT Thesis no.AQ-06-21 Tran Van Viet An evaluation of management of semi - intensive and intensive culture of black tiger shrimp (Penaeus monodon) in Soc Trang Province, Mekong Delta, Vietnam Pathum Thani, Thailand : Asian Institute of Technology, 2006 80 leaves : ill. Thesis ; no. AQ-06-21 A thesis submitted in partial fulfillment of the requirements for the degree of Master of science, School of Environment, Resources and Development Thesis (M.Sc.) - Asian Institute of Technology, 2006 In late 1990s, agriculture farmers in Vietnam faced the decreasing price of agricultural products, extensive brackish water shrimp culture attracted the agriculture farmers by higher profitability. Although the expansion of shrimp culture created the problem of overexploitation of the natural seeds and salinization of the rice filed and lower productivities of the rice, the government of Vietnam accepted change from rice to shrimp culture since 2000. This study investigated the current status of technical, environmental and institutional factors in shrimp culture in the Mekong delta. A total of 80 farms in Khanh Hoa and Vinh Tan communes (40 in each commune) in Vinh Chau district were surveyed by individual interview and Participatory Rural Appraisal with 10 participants in each commune. In addition, 4 managers in fisheries sectors and 3 officers in relevant departments of government, 5 owners of postlarval nursing services were interviewed. Information were also collected from published documents and annual reports of fisheries, environment and resources departments. The survey showed that most shrimp farmers are local people. They shifted from rice to shrimp farming because of high profitability of shrimp farming. Rice fields were therefore converted to shrimp farms. Nearly 70% of the farmers started shrimp farming after the year 2000 when government changed the policy to allow shrimp farming in this area. There are semi-intensive and intensive systems and both systems have 2 cropping a year. The period of semi-intensive system is shorter than intensive system because disease outbreak usually - more often happens in semi-intensive system than in intensive due to farmers' lack of technical knowledge, poor irrigation and low investment. Average productivity for semi-intensive and intensive systems were 0.5-1.3 and 0.6- 3 ton /ha/crop, respectively. An economic analysis showed that over 60% of farmers had deficits in 2004, with higher percentage in semi-intensive farmers. Main cause of loss was disease outbreak due to the rapid increase of farms regardless of poor irrigation, low management practice because of lack of awareness, limitation of new information and techniques resulting from limited capacity of fisheries institution, both in quality and quantity. Penaeus monodon Vietnam Soc Trang Shrimp culture Vietnam Soc Trang lkejima, Kou, Chairperson Yi , Yang, Co-chairperson Gallardo, Wenresti G., Examination Committee Berg, Hakan, Examination Committee Government of Sweden (Sida), Scholarship Donor Asian Institute of Technology. Thesis ; no. AQ-06-21 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B10306 .b11816430 mnait u 240401 0 071019 m a u 3 mnait mnait mnarc 20 40 Barcode : 30050120697866 CREATED : 1999-01-07 RECORD # : i12228163 LPATRON : 1020351 LCHKIN : 2008-07-25 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 4 TOT CHKOUT : 14 TOT RENEW : 4 Barcode : 30050120697874 CREATED : 2006-05-22 RECORD # : i12543688 LPATRON : 1026687 LCHKIN : 2017-10-11 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 2 TOT CHKOUT : 3 TOT RENEW : 2 Barcode : 30050120358691 CREATED : 2016-08-06 RECORD # : i13025910 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 41075 41075 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.AQ-06-21 30050120697866 2026-08-18 11:27:48 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.AQ-06-21 30050120697874 2026-08-18 11:27:48 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.AQ-06-21 30050120358691 2026-08-18 11:27:48 1 2026-08-18 40