Comparison of lipid properties between wild and cultured ayu

H. Nakagawa, Y. Takahara, G. R. Nematipour
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引用次数: 11

Abstract

Lipid properties were compared between cultured and wild ayu Plecoglossus altivelis obtained from 9 different producing districts of Japan. The cultured ayu was characterized by high accumulation of triglycerides in intraperitoneal fat body (IPF) and muscle. While the IPF ratio of wild ayu ranged between 0.1 and 8.6% (average 1.8•}1.6%), that of cultured ayu ranged between 1.5 and 15.1% (average 7.5•}3.6%). The muscle lipid level of cultured ayu (8.2•}2.5%) was extremely higher than that of wild ayu (3.4•}1.7%). However, the ranges of both IPF ratio and muscle lipid level of cultured ayu overlapped with those of the wild ayu. Fatty acid composition of muscle triglycerides was compared between cultured and wild ayu. According to muscle lipid level and fatty acid composition, the ayu could be divided into two groups. One group consisted mainly of the samples obtained from cultured ayu, and the other group from wild ayu. However, there were samples in the cultured ayu which could be categorized to the wild fish group. The results show the possibility that technical advancement will enable us to reduce the IPF ratio and muscle lipid level of cultured ayu to•@the values of wild ayu.
野生与养殖阿育鱼脂质特性比较
比较了日本9个不同产地的养殖和野生阿育的脂质特性。培养的阿育鱼具有甘油三酯在腹腔脂肪体(IPF)和肌肉中大量积累的特点。野生ayu的IPF值为0.1 ~ 8.6%(平均1.8•}1.6%),养殖ayu的IPF值为1.5 ~ 15.1%(平均7.5•}3.6%)。养殖阿鱼的肌脂水平(8.2•}2.5%)极显著高于野生阿鱼(3.4•}1.7%)。然而,养殖阿鱼的IPF比率和肌脂水平的变化范围与野生阿鱼有重叠。比较了养殖和野生阿育鱼肌肉甘油三酯的脂肪酸组成。根据肌肉脂质水平和脂肪酸组成可分为两组。一组以养殖阿玉为主要样本,另一组以野生阿玉为主要样本。然而,在养殖的阿育鱼中有样本可归类为野生鱼类。结果表明,技术的进步使我们有可能将培养的鱼的IPF比和肌脂水平降低到野生鱼的1 / 2。
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