Vitamin B<sub>6</sub> requirements of tilapia <i>Oreochromis niloticus</i> x <i>O. aureus</i> fed two dietary protein concentrations
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- Shiau Shi-Yen
- Department of Marine Food Science, National Taiwan Ocean University
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- Hsieh Hwei-Lin
- Department of Marine Food Science, National Taiwan Ocean University
Bibliographic Information
- Other Title
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- Vitamin B6 requirements of tilapia Oreochromis niloticus x O.aureus fed two dietary protein concentrations
- Vitamin B6 requirements of tilapia Oreo
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Abstract
A feeding trial was conducted to determine the adequate level of dietary vitamin B6 (pyridoxine, PN) for juvenile tilapia Oreochromis niloticus x O. aureus fed diets containing different dietary protein concentrations. Purified diets with eight levels of PN (0, 2, 4, 8, 12, 20, 50, 100mg/kg diet) at either 28 or 36% protein concentration were each fed to three replicate groups of tilapia (mean weight: 0.73±0.01g) for 8 weeks. Results indicated that in the 28% protein group, fish fed 4mg PN/kg diet had a more significant (p<0.05) weight gain than fish fed 0 and 100mg PN/kg diet; feed efficiency ratio (FER) of fish fed 4mg PN/kg diet was higher than fish fed 0 and 8-100mg PN/kg diets. In the 36% protein group, fish fed 12-50mg PN/kg diets had higher weight gain than fish fed 0, 100mg PN/kg diets and fish fed 20mg PN/kg diet had higher FER than fish fed 0-4mg PN/kg diets. Hepatic alanine aminotransferase (ALT) activity generally increased with increasing dietary vitamin B6 and leveled off at 12mg PN/kg and 20mg PN/kg in the 28% protein and 36% protein groups, respectively. Tilapia fed 100mg PN/kg diet at 28% protein concentration showed normocytic normochromic anemia symptoms. Weight gain and ALT activity analyzed by broken-line regression indicated that the optimum dietary vitamin B6 requirement in juvenile tilapia were 1.7-9.5mg PN/kg and 15.0-16.5mg PN/kg diet in 28% and 36% protein diets, respectively.
Journal
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- Fisheries science
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Fisheries science 63 (6), 1002-1007, 1997
The Japanese Society of Fisheries Science
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Details 詳細情報について
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- CRID
- 1390282679404434816
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- NII Article ID
- 130003903122
- 10004872580
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- NII Book ID
- AA10993718
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- NDL BIB ID
- 4371632
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- ISSN
- 09199268
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed