碩士 / 國立臺灣海洋大學 / 水產養殖學系 / 103 / Since the natural stocks of Japanese eels have drastically decreased, Taiwan began farming the A. marmorata and A. bicolor. In the beginning, both the sort of technology and the economics of its aquaculture are most important to do as a basis of the industrial development. Therefore, this study is focused on the biology and economics which affect the profit in the farming of A. marmorata and A. bicolor by means of an industrial survey and analysis.
Depending on different species and stocking size, the study is divided into four farming types for analysis, including glass eels of A. marmorata, elvers of A. marmorata, glass eels of A. bicolor and elvers of A. bicolor. According to the results, glass eels of A. marmorata culture takes longer farming cycle, higher production costs, but have better profit. The average of benefit-cost ratio in glass eels of A. marmorata culture is 1.93. Elvers of A. marmorata culture takes higher fry costs in the beginning, but the costs of feed, water-electricity and labor are lower than glass eels of A. marmorata culture. This result in elvers of A. marmorata culture have the better profit than the glass eels of A. marmorata culture. The average of benefit-cost ratio in elvers of A. marmorata culture is 2.08. The average farming cycle of glass eels of A. bicolor culture is 13.8 months, lower than A. marmorata culture. This make the glass eels of A. bicolor culture takes the lower production costs. Although, the glass eels of A. bicolor culture have lower profit, but its average of benefit-cost ratio is 1.63, it represents the cost of inputs still has profit. Elvers of A. bicolor culture takes higher fry costs in the beginning, but the costs of feed, water-electricity and labor are lower than glass eels of A. bicolor culture. The stocking density of elvers of A. bicolor culture is low, that the cost of inputs can not achieve effective utilization. This lead to the profit of elvers of A. bicolor culture is not as good as glass eels of A. bicolor culture.
According to the result of canonical correlation analysis, the biological and economy variables of A. marmorata and A. bicolor cultures show a positive correlation. When stocking density and survival rate increase, the industry operating efficiency also increase. Accoding to the analysis result of the Cobb-Douglas production function, both of the industrial culture of A. marmorata and A. bicolor, returns to scale are increasing.
The study finally based on the results give advice and application of SWOT analysis elaboration the industry development strategy. A. marmorata and A. bicolor cultures in Taiwan are in the initial stage of the industry life cycle, industrial development are limited by instability of fry source, lower farming survival rate and sales channels imperfect, there are still many problems to be overcome. In addition to develop the technical side and master the key technologies of production, but also must carefully consider the industrial development strategies.
| Identifer | oai:union.ndltd.org:TW/103NTOU5086018 |
| Date | January 2015 |
| Creators | Chang, Ming-Hsun, 張銘訓 |
| Contributors | Miao, Sha, 繆峽 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 99 |
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