碩士 / 國立臺灣海洋大學 / 水產養殖學系 / 105 / This study presents bioeconomic situation on growout farming systems of green grouper (Epinephelus coioides), hybrid grouper (E. fuscoguttatus × E. lanceolatus) and giant grouper (E. lanceolatus) in Taiwan. Farm survey on the three species was conducted and our studied variables included biological variable, cost variables and profitability variables. Different statistical methods were applied to find out the effect of the key factors on the farming profitability. The analysis on the three types of farming was done based on two major factors, geographical location, and cultured species. Because the production cycle and marketable size of giant grouper are different from the other two, the analysis on giant grouper farming was on the basis of two major factors, geographical location, and stocking size. The result indicated that hybrid grouper farming is more profitable than green grouper farming, especially the hybrid grouper farm located in Pingtung is the most profitable one. Our study showed that the farming of hybrid grouper has advantages in shorter production cycle and better FCR (feed conversion rate). However, this farming is not popular in Taiwan due to unstable supply of fry but with higher price. Our result showed that increases density and survival rate will increase the management efficiency of hybrid grouper. The studied results of giant grouper farming indicated that the farmings in Kaohsiung area should stock larger yearlings due to low temperatures to improve survival rates, shorten production cycle, and therefore have a better profitability. On the contrary, the farmings of giant grouper in Pingtung area may stock smaller fingerlings but have the same achievement due to the advantage of warmer temperature. Finally, to increase the survival rate and marketable size of giant grouper may increase the management efficiency.
| Identifer | oai:union.ndltd.org:TW/105NTOU5086023 |
| Date | January 2017 |
| Creators | Chang, Yao, 張耀 |
| 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 | 122 |
Page generated in 0.0018 seconds