Comparison of Polyunsaturated Fatty Acids Content in Filets of Anadromous and Landlocked Sockeye Salmon Oncorhynchus Nerka
Comparison of Polyunsaturated Fatty Acids Content in Filets of Anadromous and Landlocked Sockeye Salmon Oncorhynchus Nerka
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DOI：
10.1111/j.1750-3841.2012.02998.x
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发表时间：
2012-12-01
影响因子：
3.9
通讯作者：
Markevich, Grigory N.
中科院分区：
文献类型：
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作者：
Gladyshev, Michail I.;Lepskaya, Ekaterina V.;Markevich, Grigory N.
比较了俄罗斯堪察加半岛湖泊中2种红鲑的脂肪酸组成和含量。红鲑鱼的一种形式是溯河产卵（“海洋”），即成鱼在海洋中迁移觅食和生长，然后返回湖中繁殖。另一种形式的鱼，科卡尼，从来没有在海洋中迁移。营养价值的主要指标二十碳五烯酸（EPA，20：5 n-3）和二十二碳六烯酸（DHA，22：6 n-3）的百分含量在内陆型O.内尔卡。然而，浓度EPA和DHA每湿重的鱼片较高的海洋形式，因为相对较高的含量的脂肪酸在其肌肉组织中的总和。由此可见，在海洋环境中饲养的鱼类比在新鲜沃茨中饲养的同种鱼类具有更高的长链n-3脂肪酸含量。总的来说，无论是溯河产卵的红鲑鱼还是内陆的科卡尼鲑鱼，都可以推荐给人类食用，因为它们的EPA和DHA含量很高。
Fatty acid composition and content of 2 forms of sockeye salmon Oncorhynchus nerka from lakes in Kamchatka Peninsula (Russia) were compared. One form of sockeye salmon was anadromous ("marine"), that is, adult fish migrated in ocean to feed and grow and than return in the lake to breed. Fish of another form, kokanee, never migrate in the ocean. Per cent levels of the main indicators of nutritive value, eicosapentaenoic acid (EPA, 20:5n-3), and docosahexaenoic acid (DHA, 22:6n-3), were significantly higher in the landlocked O. nerka. However, concentrations of EPA and DHA per wet weight of filets were higher in the marine form, because of the relatively higher content of sum of fatty acids in their muscle tissue. As concluded, fish fed in marine environment had higher contents of long-chain n-3 fatty acids per wet weight than fish of the same species, fed in fresh waters. In general, both the anadromous sockeye salmon and the landlocked kokanee salmon can be recommended for human diet as a valuable product concerning contents of EPA and DHA.