中国对虾对亚油酸、亚麻酸的营养需要量

运用梯度法设计亚油酸、亚麻酸三水平饲料试验。结果指出,中国对虾的增重率和存活率受饲料中亚油酸、亚麻酸含量和比值双重影响。在本试验条件下,中国对虾对亚油酸、对亚麻酸的最适需要量分别为2.16％和0.87％,二者的最适比值为2.48。作为必需脂肪酸,亚麻酸的活性高于亚油酸。在以富含亚油酸的植物蛋白饲料为主要原料的对虾实用饲料中,亚油酸对亚麻酸的比值偏高,而且二者含量均不足。按需要同时添加亚油酸和亚麻酸将可获得最佳效益。

NUTRITIONAL REQUIREMENTS OF PENAEUS ORIENT ALIS FOR LINOLEIC ACID AND LINOLENIC ACID

The dietary test of shrimp, P. orientalis, was designed by meansof the gradient menthod for linoleic acid and linolenic acid. The results showedthat percentage weight gain and survival rate of the shrimp were affected by bothcontent and ratio of linoleic acid and linolenic acid. In the present test the opti-mal requirement of slirimp for linoleic acid and linolenic acid in the diet respe-etively was 2.16% and 0.87%, the optimal ratio of them was 2.48, and the linoleicacid as an essential fatty acid is more effective than linoleic acid. In the shrimppractical diet containing lots of plant protein feedstuff rich in linoleic acid, theoptimal percentage weight gain and survival rate of shrimp can be got by addingsome level of linoleic acid and linolenic acid as there were the higher ratio andlower content of linoleic acid and linolenic acid in the diet.