碩士 / 國立高雄海洋科技大學 / 漁業生產與管理研究所 / 97 / This study was undertaken to investigate the utilization of various dietary Carotenoid sources on pigmentation of Xiphophorus maculates. Natural carotenoids from astaxanthin containing yeast Phaffia rhodozyma(P), alga Haematococcus pluvialis(H), Photosynthetic bacteria Rhodospirillum rubrum(PSB) and a synthetic astaxanthin carophyll pink(A) were supplemented in formulated diets at two concentration, 80(I) and 160(II)ppm, resulting in nine pigmented diets PI, HI, PSBI, AI, PII, HII, PSBII, and AII. Formulated diets without Carotenoid supplementation served as a control(C).The different diets were fed to Xiphophorus maculates for 2 months. Dietary Carotenoid effects on survival, growth, and pigment metabolism were compared by the treatment individually or collectively . No difference in weight gain and survival rate were found among all fish. There were higher pigment content both AII and HII than those other treatments. The pigmentation of astaxanthin in the fish of natural astaxanthin–fed, and artificial astaxanthin-fed fish were higher than those of fish fed without astaxanthin. There were not significantly different in apparent digestibility coefficient among treatments. All of treatments have 92% apparent digestibility coefficient. There were higher pigment conversion rate in treatment than control. It has not significantly different in PCR among treatments. Pigment conversion rate of the fish fed with 80mg kg-1 were significantly lower than those that fed with 160 ppm. There were higher Utilization of pigment in treatments which fed with astaxanthin and Haematococcus pluvialis. There were significantly pigment content in Xiphophorus maculates with increasing pigment concentration.
| Identifer | oai:union.ndltd.org:TW/097NKIM8451013 |
| Date | January 2009 |
| Creators | Yu-Hung Ju, 朱毓弘 |
| Contributors | Chih-Hung Pan, 潘志弘 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 65 |
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