碩士 / 國立臺灣海洋大學 / 水產養殖學系 / 100 / This study analyzed the bioeconomic performances extensive, semi-intensive and intensive farming systems of giant tiger shrimp (Penaeus monodon) in Tra Vinh province, Viet Nam.
The study found that the fixed costs, seed, feed, fuel-electricity and labor costs are the primary costs in commercial giant tiger shrimp farming. The fixed costs, seed, feed intensities amounted to 88.43% of total variation in production of shrimp farming. Moreover, varied profitability of fixed cost, labor and seed, which was higher than the other ones, was significantly different between three farming systems (P≤0.05). Besides, the varied profitability of feed in extensive system was the highest and signifying discrepancy with other ones (P≤0.05), whereas feed profitability between semi-intensive and intensive systems was not significant difference. However, the Benefit Cost Ratio and rate of farm income of farmers in extensive, semi-intensive and intensive farming systems accounted for 1.64, 1.85, 2.0 and made up 36.53%, 45.19%, 49.64%, respectively. Consequently, the results highlighted intensive farming system, which had a higher production cost and varied profitability than semi-intensive farming systems meanwhile extensive system was the smallest, was the most profitable, technically and economically viable enterprise in giant tiger shrimp farming.
An increase in production system, which would increase production cost but labor cost, resulted in positive effect of revenue performance; producing giant tiger shrimp in intensive system is an important strategy for higher stocking density contributed to better revenue; better seed quality would increase the survival rate, in turn improve fixed cost, seed and labor profitability; increasing survival rate may produce a negative effect on feed and fuel-electricity profitability. Finally, controlling pH (7.5-8.35), salinity (15-25‰), alkalinity (>80ppm) range is recommended for the culture of juvenile P. monodon farming as it can be utilized in farm site and season selection and salinity maintenance to maximize commercial productivity.
| Identifer | oai:union.ndltd.org:TW/100NTOU5086024 |
| Date | January 2012 |
| Creators | Tran Thi Phuong Hong Hue, 陳惠 |
| Contributors | Sha Miao, 繆峽 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | en_US |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 191 |
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