碩士 / 國立臺灣海洋大學 / 水產養殖學系 / 93 / There were three experiments in this study. Experiment I was conducted to evaluate the levels of dietary fish oil/corn oil(2:1, w/w) mixture needed for maximum weight gain of juvenile Litopeaneus vannamei. Seven isoengergetic and isonitrogenous semi-purified diets with supplementary lipid levels ranging from 0 to 12% in 2% increments were evaluated with nearly metamorphosed post-larvae. White shrimp fed with diet without the oil supplement had significantly lower weight gain (353%) than those fed the other diets. White shrimp fed with diet containing 10% lipid had the significantly higher weight gain then those fed the other treatments. Based on the percentage weight gain data, using second-order polynomial regression analysis, the optimal dietary lipid of juvenile Litopenaeus vannamei was found to be approximately 11.0%. Survival ranged from 83.33%~100% for all groups. Experiment II was conducted to evaluate the effects of feeding various sources of dietary lipid on weight gain, survival and fatty acid composition of juvenile Litopenaeus vannamei. Seven semi-purified diets containing defatted fish meal were supplemented with 6.0% of either linseed oil, beef oil, corn oil, soybean oil, olive oil, fish oil, sesame oils, weight gain of white shrimp was best for shrimp fed the diet containing fish oil. Weight gains were the latest for shrimp fed the diet containing beef oil. The fatty acid composition of the shrimp generally reflected these of the dietary lipids, especially for the diets containing unsaturated fatty acids. Shrimp fed fish oil had high levels of 20:5n-3 and 22:6n-3 in body tissue. Experiment III was conducted to evaluate the effects of feeding different levels of dietary cholesterol on weight gains, survival of juvenil Litopenaeus vannamei. Six isoenergetic and isonitrogenous diets containing 0, 0.2, 0.4, 0.5, 0.8, 1% cholesterol were evaluated. After termination of the experiment, shrimp fed the diets containing 0.5% and 0.8% cholesterol had significantly higher weight gain than those fed the other diets. Shrimp fed the diet without cholesterol supplement had the lowest survival and weight gain. Survival of shrimp fed cholesterol diets ranged from 75~95%. Diets containing 1% cholesterol had an adverse effect on shrimp growth. Based on percent weight gain data, using broken-line analysis, the optimal dietary cholesterol requirement for juvenile Litopenaeus vannamei was found to be approximately 0.68%.
| Identifer | oai:union.ndltd.org:TW/093NTOU5086023 |
| Date | January 2005 |
| Creators | Nien Wen-Hisu, 粘雯琇 |
| Contributors | Sheen Shyn-Shin, 沈士新 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 75 |
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