Decrease of organic waste by the polyculture of giant tiger prawn and green mussel
Country
Thailand
Description
[Synopsis]
Intensive prawn culture discharges a large amount of organic waste to the environment. We carried out studies on the monoculture of gian tiger prawn and the polyculture of giant tiger prawn and green mussel in concrete tanks and the earthen ponds in Thailand in relation to nutrient budget and water quality. In concrete tanks, the survival rates of shrimp at densities of 20, 30, 50 ind/m2 were 75, 70, 62% in monoculture and 68, 65, 59% in polyculture, and the survival rates of green mussel were 43, 24 and 0.3%, respectively. Conversion ratio of feed's nitrogen to prawn was 21% in polyculture and 16% in monoculture, and ratios for the discharge were 56 and 71%, respectively. In earthen ponds, the production of prawn in polyculture and monoculture was 1.5 and 2.05 tons/ha, respectively. Green mussel only assimilated 2.7% and 4.4% of feed's nitrogen and carbon, respectively. However, the amount of the organic sediment was 368 and 793 m3 /ha, in polyculture and monoculture, respectively. Consequently the polyculture contributed to reduction of the organic sediment, presumably due to the assimilation by green mussel and the other effects.
- Affiliation
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Japan International Research Center for Agricultural Sciences Fisheries Division
- Classification
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Administration
- Term of research
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FY2000 (FY1998-2000)
- Responsible researcher
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HIGANO Junya ( Fisheries Division )
PICHITKUL Phongchate ( Kasetsart University )
- ほか
- Japanese PDF
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2000_23_A3_ja.pdf877.55 KB