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Báo cáo nghiên cứu khoa học: Better Breeds of Common Carp (Cyprinus carpio L.) for Small-scale Fish Farmers (Milestone 4)

Tại Việt Nam nuôi trồng thủy sản đóng một vai trò rất quan trọng trong phát triển kinh tế và thực phẩm an ninh cho nông dân quy mô nhỏ và đóng góp 35% tiêu thụ protein của Việt Nam. Nuôi trồng thủy sản sản xuất đang gia tăng với tỷ lệ 10% mỗi năm và góp phần đáng kể thu nhập xuất khẩu của đất nước (MOFI, 2007). | Australian Government AusAID Ministry of Agriculture Rural Development Collaboration for Agriculture Rural Development 002 04VIE Project Better Breeds of Common Carp Cyprinus carpio L. for Small-scale Fish Farmers Milestone 4 On-farm Trials and Uptake of Improved Breeds of Common Carp Christopher M Austin1 Tuan Anh Pham2 Binh Thanh Thai2 Hung Quang Le2 1School of Science and Primary Industries Charles Darwin University Darwin Northern Territory 0909 Australia Research Institute for Aquaculture No 1 Dinh Bang Tu Son Bac Ninh Vietnam October 2007 2 Contents Contents.2 List of Figures.3 List of Table.4 1. Introduction.6 2. Materials and methods.7 2.1. Experimental Design.7 2.2. Selection of common carp strains.8 2.3. Common carp rearing and experimental procedures.9 2.4. Data collection and analysis.11 3. Results.14 3.1. Fingerling growth rate.14 3.2. Growth and survival of HP3 and LOC strains and effects of feed input.14 3.3. Growth rate and survival of HP3 H3B and LOC strains.17 3.4. Growth rate and survival for HP3 VNW and LOC Strains.19 3.5. Growth rate and survival of HP3 H3B VNW and LOC strains in low feed input farms controlled for variation among farmer ponds.21 3.6. Common carp biomass production in farms stocked with three common carp strain HP3 H3B LOC .23 3.7. Common carp biomass production comparing farms stocked with two common carp strains HP3 and LOC .25 3.8. Demand of the improved common carp seed.27 4. Conclusion and Recommendations.29 Appendices . 33 Reference.34 3 List of Figures Fig 2.1. Rice field used for farm trials in Yen Bai province.9 Fig 2.2. Farmer s pond in Thai Nguyen province.9 Fig 2.3. Measuring common carp.11 Fig 2.4. Ethnic people harvesting common cap in rice field in Yen Bai province.12 Fig 2.5. Harvesting common carp in pond in Thai Nguyen.13 Fig 2.6. A farmer is happy with common carp growth.13 Fig 3.1. Daily growth rate of HP3 and LOC common carp strains in each of 18 farms.15 Fig 3.2. Example of relative growth of three strains