English  |  正體中文  |  简体中文  |  Items with full text/Total items : 26994/38795
Visitors : 2391589      Online Users : 85
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search
LoginUploadHelpAboutAdminister

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/46503

Title: Dietary cobalt can promote gastrointestinal bacterial production of vitamin B12 in sufficient amounts to supply growth requirements of grouper, Epinephelus malabaricus
Authors: Yu-Hung,Lin
Jing-Yun,Wu
Shi-Yen,Shiau
Contributors: 國立臺灣海洋大學:食品科學系
Keywords: Nutrient requirement
Cobalt
Grouper
Vitamin B12
Date: 2010
Issue Date: 2018-05-21T07:00:55Z
Publisher: Aquaculture
Abstract: Abstract: Two growth trials were conducted to elucidate the dietary essentiality of cobalt (Co) and vitamin B12 for grouper, Epinephelus malabaricus. In Exp. 1, a vitamin B12-free basal diet was supplemented with 0.05, 6.5, 10.7, 20.7, 41.6, 82.7 and 153.1 mg Co/kg; in Exp. 2, a vitamin B12-free basal diet with 10 mg Co/kg was supplemented with 0, 8.3, 18.1, 54.0, 87.1 and 193.2 μg B12/kg diet, a vitamin B12-free basal diet with 10 mg Co/kg and 1% succinylsulfathiazole (0 + antibiotic) was also included in Exp. 2. Each diet was fed to triplicate groups of juvenile grouper (initial body wt: 8.04 ± 0.06 g in Exp. 1; 7.50 ± 0.06 g in Exp. 2) in a recirculated rearing system for 8 weeks. In Exp. 1, weight gain (WG) and feed efficiency (FE) were higher (P < 0.05) in fish fed diets with 10.7 and 20.7 mg Co/kg than fish fed diets with ≤ 6.5 mg Co/kg. Hepatic vitamin B12 concentration was highest in fish fed diets with ≥ 20.7 mg Co/kg, followed by fish fed the diet with 10.7 mg Co/kg, and lowest in fish fed diets with ≤ 6.5 mg Co/kg. Fish fed diets with ≥ 20.7 mg Co/kg had the highest plasma vitamin B12 concentration, followed by fish fed the diet with 6.5 mg Co/kg, and lowest concentration was in fish fed the diet with 0.05 mg Co/kg. Analysis by broken-line regression indicated that 10 and 20 mg Co/kg diet are required for optimal growth and maximum hepatic and plasma vitamin B12 concentrations in grouper, respectively. In Exp. 2, WG, FE and survival in fish were not affected (P > 0.05) by the dietary treatments. Hepatic and plasma vitamin B12 concentrations were lower in fish fed the 0 + antibiotic diet than those fed the diet with 193 μg B12/kg. These results revealed that grouper require 10 mg Co/kg diet for optimal growth; no vitamin B12 is needed in the diet containing adequate Co.
Relation: 302(1-2) pp.89-93
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/46503
Appears in Collections:[食品科學系] 期刊論文

Files in This Item:

File Description SizeFormat
index.html0KbHTML17View/Open


All items in NTOUR are protected by copyright, with all rights reserved.

 


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback