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CAGE CULTURE Nguyen Van Sang, MSc. nguyenvansang1973@yahoo.com Research Institute for Aquaculture No.2
Contents ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
1. Review of cage culture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
2. Benefits, risks and disadvantages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
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3. Principles of cage culture
3.1. Site selection ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Khanh Hoa
Bad site (Strong Wave)
[object Object],[object Object],[object Object],[object Object],[object Object],Design and lay out of floating net cages Design and lay out of floating net cages is need to consider several variables  : CONDITION IN TANJUNG PUTUS  Pond culture Pond Unit lay out not regulated nicely
Cage culture in Vung Tau province, Vietnam Too crowded Inhabitant zone Pond shrimp culture Estuary zone
Culrure area Fishing ship Inhabitant zones Inhabitant zones Nha Trang
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
3.2. Cage structure and design ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
 
Buoy (200L) Two bar of wood (0,3m) 6m 6m b. Design of draft of floating net cage 0.5-1m Storehouse Lab Accomod-ation Living room Cleaning area
Anchor Fig. 7Cage design for marine fish rearing and growout
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Example for mesh size of cobia cage culture Fish weight (g) Cage size (m) Mesh size (cm) < 50 2 x 2 x 2 0.5 50-500 3 x 3 x 3 1-2 500-2000 4 x 4 x 3 2-3 2000-4000 6x6x3 4-5 4000-6000 12x6x4 5-7 > 6000 12x6x4 7-10
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[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
3.3. Culture species ,[object Object],[object Object]
 
 
4. Pangasius cage culture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
- Feeding + Frequency: 2-4 times/day + Feed size: 2-10 cm depends on size of fish + Feeding duration: 30-60’ + Feeding space: wide enough
3 5 300-500 3 3-5 >500 5 5 100-300 5-7 6-12 <100 % body weight % body weight Size of fish (g) Commercial pellets Home made feed
[object Object],[object Object],[object Object],[object Object],[object Object]
4.5. Husbandry and management ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
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[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
4.6. Harvesting and selling ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
4.7. Profit  ( Tilapia in 2005 ) 53.6 55.1 55.1 55.2 54.7 55.2 43.0 57.0 Profit ratio  (profit*100/investment)  (%) 4.5 4.79 4.80 4.80 4.76 4.80 4.2 3.4  Profit ratio  (Million VND/tons) 55.1 61.4 78.6 54.7 53.7 53.3 60.5 53.3 Yield (kg/m 3 ) 66.1 57.7 48.7 69.4 58.4 62.7 85 81 Survival rate (%) 0.59 0.62 0.72 0.50 0.70 0.57 0.43 0.61 Mean weight (kg) Aver. 7 6 5 4 3 2 1 Exmaple of tilapia: 15.000 VND/USD
Thank you very much for your attention!

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Cage Culture 3

  • 1. CAGE CULTURE Nguyen Van Sang, MSc. nguyenvansang1973@yahoo.com Research Institute for Aquaculture No.2
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  • 6. 3. Principles of cage culture
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  • 11. Cage culture in Vung Tau province, Vietnam Too crowded Inhabitant zone Pond shrimp culture Estuary zone
  • 12. Culrure area Fishing ship Inhabitant zones Inhabitant zones Nha Trang
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  • 18. Buoy (200L) Two bar of wood (0,3m) 6m 6m b. Design of draft of floating net cage 0.5-1m Storehouse Lab Accomod-ation Living room Cleaning area
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  • 20. Anchor Fig. 7Cage design for marine fish rearing and growout
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  • 22. Example for mesh size of cobia cage culture Fish weight (g) Cage size (m) Mesh size (cm) < 50 2 x 2 x 2 0.5 50-500 3 x 3 x 3 1-2 500-2000 4 x 4 x 3 2-3 2000-4000 6x6x3 4-5 4000-6000 12x6x4 5-7 > 6000 12x6x4 7-10
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  • 33. - Feeding + Frequency: 2-4 times/day + Feed size: 2-10 cm depends on size of fish + Feeding duration: 30-60’ + Feeding space: wide enough
  • 34. 3 5 300-500 3 3-5 >500 5 5 100-300 5-7 6-12 <100 % body weight % body weight Size of fish (g) Commercial pellets Home made feed
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  • 43. 4.7. Profit ( Tilapia in 2005 ) 53.6 55.1 55.1 55.2 54.7 55.2 43.0 57.0 Profit ratio (profit*100/investment) (%) 4.5 4.79 4.80 4.80 4.76 4.80 4.2 3.4 Profit ratio (Million VND/tons) 55.1 61.4 78.6 54.7 53.7 53.3 60.5 53.3 Yield (kg/m 3 ) 66.1 57.7 48.7 69.4 58.4 62.7 85 81 Survival rate (%) 0.59 0.62 0.72 0.50 0.70 0.57 0.43 0.61 Mean weight (kg) Aver. 7 6 5 4 3 2 1 Exmaple of tilapia: 15.000 VND/USD
  • 44. Thank you very much for your attention!