碩士 / 國立臺灣大學 / 漁業科學研究所 / 97 / Tilapia is now the primary product of aquaculture industry in Taiwan. Red Tilapia (Oreochromis sp.) was mutate from the Mozambique tilapia species. The purpose of this study is to explore the effects of dietary carotenoids supplements on the integument pigmentation of the red tilapia (Oreochromis sp.).
Experiment is divided into two parts. Two experiments were used to add different sources of carotenoids: gene transfered Escherichia coli powder and synthetic astaxanthin. In the 1st trial, mean weight of the red tilapia was about 2.6g. Experimental diets were divided into five groups, control group (Ctrl); E-50、E-100 were supplemented with gene transfered Escherichia coli powder with two different carotenoid contents, 50 and 100 mg/kg diet; R-50、R-100 were supplemented with synthetic astaxanthin, 50 and 100 mg/kg diet. The experiment period was 10 weeks. The 2nd trial used the same formula with the 1st trial, and the mean weight of the red tilapia was about 53 g. Experiment last for 60 days, sampling every 15 days. Fish skin were tested with tristimulus colorimeter, and further quantified for integument pigment.
The results postulated that carotenoids have not obvious effects on the growth performance and feed efficiency, but improve pigmentation by enhanced a and b values in the red tilapia. In the 1st trial, the △ E varied from 8.06 to 14.89, while the content of carotenoids in red tilapia’ s integument varied from 0.25 to 0.84 mg/100g integument. In the 2nd trial, the △ E varied from 9.06 to 14.15, the integument pigmentation measurement results similar with the 1st trial: Ctrl was the lowest (0.33 ~ 0.69 mg/100g integument), and E-100 group was the highest (1.67 ~ 4.08 mg/100g integument).
| Identifer | oai:union.ndltd.org:TW/097NTU05451019 |
| Date | January 2009 |
| Creators | You-Syu Huang, 黃侑勖 |
| Contributors | 廖文亮 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 59 |
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