摘要
实验选用初始作重约1．4g的草鱼，在60天的饲养期中分别投喂1种不含脂肪的饲料和8种含3％不同脂质的饲料，观察了饲料中添加油酸（18：1n-9）、亚油酸（18：2n－6）、亚麻酸（18：3n－3）和n－3系列高度不饱和脂肪酸（n－3HUFA；20：5n－3＋22：6n－3）对草鱼肝胰脏、肌肉、头部和去肝胰脏内脏脂质含量和脂肪酸构成的影响。实验结果表明，与摄食单纯含油酸饲料的草鱼相比，含1％18：2n－6和1％18：3n－3或1％18：2n－6和0．5％n－3HUFA饲料组草鱼的肝胰脏脂质含量显著降低，但内脏脂质含量升高。向饲料中添加18：2n－6、18：3n－3和n－3HUFA能明显影响草鱼肝胰脏、肌肉和头部脂质多不饱和脂肪酸的相对含量；组织中n－6系列和n－3系列高度不饱和脂肪酸含量分别与饲料中添加18：2n－6和18：3n－3有相关关系，表明草鱼具有生物转化18：2n－6和18：3n－3为高度不饱和脂肪酸的能力。
Grass carp, Cienopharyngodon idellus (C. et V. ), weighing about 1. 4g, were fed re-spectively on a fat - free diet and on eight diets containing 3 % different lipids. After a 60 -day feeding period, the lipid content and fatty acid composition of hepatopancreas, muscle,head and vicera without hepatopancreas were examined. In the grass carp fed diets supple-mented with 1% 18: 2n - 6 + 1 % 18; 3n - 3 or 1 % 18: 2n - 6 + 0. 5% n - 3 polyunsaturatedfatty acids(n - 3HUFA, 20: 2n - 3 + 22: 6n - 3), the lipid content of hepatopancreas waslower than in the fish fed the diet containing 18: 1n - 9 alone, but the lipid level of visceracontaining no hepatopancreas was higher. The addition of 18: 2n - 6 or18: 3n - 3 or n -3HUFA to the diets affected greatly the fatty acid composition of the organs examined,showing a correlative relationship between the tissue n - 6HUFA(20: 4n - 6, 22: 5n - 6) orn - 3HUFA(20: 5n - 3, 22: 611 - 3) content and the dietary 18: 2n - 6 or 18: 3n - 3. It wassuggested, from this result, that these two fatty acids could be converted to n - 6HUFA orn - 3HUFA in grass carp, respectively.
出处
《动物营养学报》
CAS
CSCD
1997年第3期36-44,共9页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
中国博士后科学基金
广东省博士后科学研究基金
关键词
亚油酸
亚麻酸
脂肪酸
草鱼
脂质
饲料
Linoeic acid, Linolenic adic, Fatty acid composition, Grass carp
