碩士 / 國立臺灣海洋大學 / 水產養殖學系 / 107 / This study conducted a biological and economic investigation of white shrimp Litopenaeus vannamei farming industry in the Northeastern of Taiwan. The key factors affecting the production and profitability of shrimp farming were explored by multivariate analysis of variance (MANOVA), discriminant function, canonical correlation and Cobb–Douglas function analyses, which was based on two determined factors including farming location and culture mode (method). The areas close to the coastline including Taitung and Yilan were suitable for monoculture as it is convenient to change the water mainly from the coastline. On the other hand, Kaohsiung and Tainan where depend mostly on groundwater were suitable for applying polyculture mode, which could help not only reduce the feed cost and subsoil damage but also improve profitability.
According to the results of this study, the survival rate of white shrimp monoculture in Yilan was 52% and that of Taitung monoculture was 42%. The highest profitability was found in Taitung with an average total revenue of 501,338 TWD/fen, followed by Yilan monoculture with 346,093 TWD/fen. The benefit cost ratio of Kaohsiung polyculture was 1.4, followed by Yilan monoculture with 1.0, Taitung monoculture with 0.9 and Tainan polyculture with 0.8. The canonical correlation results showed that the total revenue, total cost and the benefit cost ratio increased relatively with the increase of survival rate, stocking density and farming cycle. This, accordingly, could result in the increase of economic efficiency of the white shrimp farming industry in Taiwan. Therefore, the profitability of Litopenaeus Vannamei farming could increase by increasing stocking density. The Cobb-Douglas results indicated that the seedling and feed costs, in monoculture, were the key factors affecting the production of Litopenaeus Vannamei, with the increasing returns to scale. For polyculture, the feed, rent and probiotics cost was considered as the key factor affecting the Litopenaeus vannamei production, with the decreasing returns to scale.
Notes: One hectare is equal to 10.31 fen
| Identifer | oai:union.ndltd.org:TW/107NTOU5086036 |
| Date | January 2019 |
| Creators | Lin, Yi-Min, 林怡旻 |
| Contributors | Huang, Cheng-Ting, 黃振庭 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 77 |
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