9种野生鲳鱼肌肉脂肪酸组成与分析

庄海旗; 刘江琴; 钟宇; 崔燎; 罗辉

doi:10.19303/j.issn.1008-0384.2019.10.003

9种野生鲳鱼肌肉脂肪酸组成与分析

Comparison of Fatty Acids in Muscles of 9 Species of Wild White Pomfret

摘要

摘要:
目的比较9种野生鲳鱼肌肉脂肪酸的含量，并对各脂肪酸组成进行相关性分析，为鲳鱼的开发利用提供参考依据。
方法用0.5%硫酸-甲醇处理各种鲳鱼肌肉，毛细管气相色谱法测定其脂肪酸组分，用IBM SPSS Statistics 20进行相关性分析和聚类分析。
结果 9种野生鲳鱼肌肉饱和脂肪酸含量为34.52%～48.29%，单不饱和脂肪酸含量为15.35%～35.91%，多不饱和脂肪酸含量为18.45%～37.26%，其中C16 ∶ 0含量稳定且最高；相关性分析显示，∑MUFA与∑PUFA呈负相关，∑SFA与∑MUFA、∑PUFA相关性小；主要脂肪酸C20 ∶ 4(6)(AA)和C22 ∶ 6(3)(DHA)分别与ω-6和ω-3呈极显著正相关，而EPA与其他脂肪酸的相关性小。聚类分析可将9种鲳鱼分成3个组群，其中中国鲳、珍鲳和银鲳等3种鲳属鱼种的脂肪酸组成含量相似。
结论 9种鲳鱼的EPA+DHA和多不饱和脂肪酸含量均较高，具有较高的营养价值或医用价值；鲳鱼脂肪酸组成的相关性分析和聚类分析可为其脂肪酸代谢和鱼类分类学的研究提供参考。

Abstract:
Objective The fatty acids (FFs) in the muscles of 9 species of wild white pomfret were compared for the development and utilization of the marine resource.
Method Samples of fish muscles were treated with 0.5% sulfuric acid-methanol prior to FF determination using capillary gas chromatography. Correlation and cluster analyses on the FFs were performed by IBM SPSS Statistics 20.
Result The muscles of the 9 species contained 34.52% to 48.29% of saturated FFs, 15.35% to 35.91% of monounsaturated FFs, and 18.45% to 37.26% of polyunsaturated FFs. The content of C16 ∶ 0 FF was similar in all species and the highest among all detected in the muscles. ∑MUFA was found inversely correlated with ∑PUFA, and ∑SFA not correlated with either ∑MUFA or ∑PUFA. The major FF, C20 ∶ 4(6)(AA), correlated with ω-6, and C22 ∶ 6 (3)(DHA) with ω-3, while EPA with none. Based upon the FF compositions, the 9 species were clustered into 3 groups, such as, Pampus genera, P. chinensis, P. minor and P. argenteus in one category.
Conclusion The contents of nutraceutical EPA+DHA and polyunsaturated FFs were high in the 9 species of wild white pomfret. The analytical information was of value for studies on the metabolism and taxonomy of white pomfret.

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