碩士 / 國立海洋大學 / 食品科學系 / 89 / Two experiments were conducted to quantify the optimum dietary ferric citrate (Fe-citrate) and ferrous sulfate (FeSO4·7H2O) requirements of juvenile hybrid tilapia (Oreochromis niloticus × O. aureus).
ExperimentⅠ. Purified diets with 8 levels (0, 10, 30, 50, 100, 150, 200 and 400 mg/kg diet) of supplemental Fe-citrate were fed to tilapia (mean body weight 0.63 ± 0.02 g) for 8 weeks. Each diet was fed to triplicate groups of fish. Results indicated that fish fed the control diet without iron supplementation showed microcytic hypochromic anemia and had lower (p<0.05) weight gain (WG), feed efficiency (FE) and protein efficiency ratio (PER) than fish fed 150 mg Fe-citrate/kg diet. Fish fed 200 and 400 mg Fe-citrate/kg diets had higher hepatic iron concentration than fish fed 0 and 10 mg Fe-citrate/kg diets. Fish fed diet with 100 mg Fe-citrate/kg had higher whole body iron concentration than fish fed the control diet. Analysis of the weight gain and the hemoglobin concentration of the fish by broken-line regression indicate that the optimum dietary Fe-citrate requirement in tilapia is approximately 157 mg/kg and 121 mg/kg diet, respectively.
Experiment Ⅱ. Purified diets with 7 levels (0, 10, 30, 50, 100, 150 and 200 mg/kg diet) of FeSO4·7H2O were fed to tilapia (mean body weight 0.64 ± 0.01 g) for 8 weeks. Diet with 150 mg Fe-citrate/kg diet was also included in the study for comparison. Each diet was fed to triplicate groups of fish. Fish fed diet supplemented with 50 mg FeSO4/kg diet had higher WG, FE and PER than fish fed the unsupplemented control diet. Fish fed the control diet had lower hepatic and whole body iron concentration than fish fed 50 mg FeSO4/kg diet. No differences in WG, FE, PER, hepatic and whole body iron concentrations were observed in fish fed the 50 mg FeSO4/kg diet and the 150 mg Fe-citrate/kg diet. Analysis of the weight gain of the fish by polynomial regression, and the hemoglobin concentration of the fish by broken-line regression indicate that the optimum dietary FeSO4 requirement in tilapia is approximately 85 mg/kg and 96 mg/kg diet, respectively.
| Identifer | oai:union.ndltd.org:TW/089NTOU0253040 |
| Date | January 2001 |
| Creators | 蘇麗文 |
| Contributors | Shiau, S.Y., 蕭錫延 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 105 |
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