文献类型：期刊文献

中文题名：饲料中不同水平n-3 HUFA对军曹鱼生长及脂肪酸组成的影响

英文题名：EFFECTS OF DIETARY N-3 HIGHLY UNSATURATED FATTY ACIDS ON GROWTH AND FATTY ACID COMPOSITION OF JUVENILE COBIA(RACHYCENTRON CANADUM)

作者：刘兴旺[1];谭北平[1];麦康森[1];艾庆辉[1];周歧存[2]

机构：[1]中国海洋大学教育部海水养殖重点实验室;[2]湛江海洋大学水产学院

年份：2007

卷号：31

期号：2

起止页码：190

中文期刊名：水生生物学报

外文期刊名：Acta Hydrobiologica Sinica

收录：CSTPCD、、北大核心2004、CSCD2011_2012、北大核心、CSCD

基金：国家自然科学基金(30271040)资助

语种：中文

中文关键词：军曹鱼;脂肪酸需要;n-3;HUFA;摄食和营养

外文关键词：Rachycentron canadum; Fatty acid requirement; n-3 HUFA; Feeding and Nutrition

中文摘要：以鱼粉、豆粕和酪蛋白为蛋白源,通过调节饲料中的牛油和鱼油水平,使饲料中高度不饱和脂肪酸(n-3 HU-FA)的含量分别达到0.60、0.96、1.24、1.56、1.77和2.11%,配制出6种等氮等能的实验饲料,并以此饲料投喂军曹鱼幼鱼(8.3±0.5g)8周。实验结果显示饲料中n-3 HUFA水平对实验鱼成活率没有显著影响,但却显著影响了军曹鱼的特定生长率(SGR)。随着饲料中n-3 HUFA水平的升高,SGR相应提高,但当饲料中n-3 HUFA水平高于1.24%时,各处理之间的生长没有出现显著差异。随着饲料中n-3 HUFA水平的升高,肌肉和肝脏中18∶1n-9的含量逐渐下降,而22∶6n-3的水平相应升高。根据实验结果,当以特定生长率为评价指标时,用折线模型估计出军曹鱼对饲料中n-3 HUFA的需求量约为1.49%。

外文摘要：A feeding experiment was conducted in floating sea cages （ 1. 0m× 1.5m × 2.0m） to determine the requirement of juvenile cobia （Rachycentron canadum） for n-3 highly unsaturated fatty acids （n-3 HUFA）. Six semi-purified diets were formulated to contain graded levels of n-3 HUFA, ranging from 0.6 to 2.11% . Juvenile fish （weighing 8.3 ＋ 0.5g） were randomly divided into 18 cages of 20 fish, and fed one of 6 diets for 8 weeks. The water temperature fluctuated from 29 to 23.5℃, the salinity from 20.9 to 23.9‰, and dissolved oxygen content was approximately 7mg/L during the experimental period. No significant differences （ANOVA, p 〉 0.05） in survival were observed among dietary treatments. However, specific growth rate （SGR） was significantly （p 〈 0.05） affected by dietary n-3 HUFA. SGR significantly increased with increasing dietary n-3 HUFA from 0 to 1.24%, and reached a peak at 1.56% of n-3 HUFA. Then, SGR slightly decreased for the groups fed the diets containing higher than 1.56% of n-3 HUFA. The content of 18：1n-9 in muscle and liver decreased, while 22：6n-3 increased with increasing dietary n-3 HUFA. Based on SGR, the requirement for n-3 HUFA of juvenile cobia is about 1.49% of dry diet by broken-line analysis.