Báo cáo Nghiên cứu khoa học Status of common carp in Vietnam

Status of common carp in Vietnam Le Quang Hung Research Institute for Aquaculture No.1, Bac Ninh, Vietnam Results The project investigated at North, Central and South in Vietnam including: „ State and private hatcheries produce a common carp. „ Farmer rearing and culture a common carp. Hatcheries/F armers No % Households 91 68.4 State hatcheries 30 22.6 Private 12 9.0 Total 133 100.0 Culture conditions Condition % Rice-fish 6.77 In pond 78.95 Rice-fish and pond 12.78 Cage/pen 1.50 Common carp culture condition 7.89 1.50 12.78 78.95 Rice-fish Pond Rice-fish and Pond Cage/pen Water source Water source used in culture common carp (%) 17.3 3.8 78.9 Irrigation Rain Stream Common carp grow-out with other species 0.87 2.33 3.38 11.24 9.03 10.87 3.12 9.75 18.53 30.88 Common Grass carp Silver carp Bighead carp Rohu Mrigal Tilapia Black carp Soloma Others Culture knowledge in Common carp 41.72 29.80 5.30 8.61 14.57 Self study Media Communication Heritage Training Source of common carp seed 14.79 4.93 4.23 55.63 20.42 River, stream Hatcheries Traders Others Trader and Hatcherise Common carp breeds cultured 15.09 21.70 57.55 5.66 0 20 40 60 80 Local Selective Hybrid Others Traders selling seed of carp (%) 96.19 3.81 0.00 20.00 40.00 60.00 80.00 100.00 Yes No Common carp production „ Some hatcheries established early at 1966 „ Some hatcheries established at 2005 „ The most hatcheries established during 1982-1984 „ A artificial technique for common carp at both state and private hatcheries, re-production 1-3 per year. Common carp production „ Breeding methods: „ A artificial technique applies for common carp in both state and private hatcheries. „ Common carp re-produce about 1-3/year. „ Feed for mature: „ Bud rice, soya bean, cassava, muck and pellet feed. „ Density: 0.4-1.0 ind/10m2 Carp seed quality evaluation 62.41 25.56 11.28 0.75 Good Moderate Poor No idea Common carp seed demand 36.84 2.26 60.15 0.75 Increase Decrease No idea Not change Supplied seed to neighbours 0.75 32.33 1.50 65.41 Very often Rarely Others Some time Change common carp broodstock Change (%) Every year 41.2 2 year 17.6 3-4 years 32.4 More 4 year 8.8 „ Broodstock of carp changing and addition about 10-20% in total No. broodstock were 64,50% in hatcheries. Source of carp brood change „ Brood common carp addition or change from outside: 57,90% „ Brood common carp addition or change on farm: 31,60% 57.9 31.6 10.5 Outside On farm Both Source of carp brood change „ Most common carp change or addition in hatcheries source at RIA#1 (69,60%) 69.60 4.30 26.10 RIA#1 Other Hungarian strain Hatcheries: Use the same carp brood for next breeding season 89.47 10.53 0.00 20.00 40.00 60.00 80.00 100.00 Yes No Thank you !