High Proportion of Docosahexaenoic Acid in the Lipid of Juvenile and Young Skipjack Tuna, Katsuwonus pelamis from the Tropical Western Pacific
High Proportion of Docosahexaenoic Acid in the Lipid of Juvenile and Young Skipjack Tuna, Katsuwonus pelamis from the Tropical Western Pacific
复制标题
热带西太平洋鲣鱼幼鱼和 Katsuwonus pelamis 的脂质中二十二碳六烯酸的含量很高
DOI：
10.2331/fishsci.65.806
复制
发表时间：
1999
影响因子：
1.9
通讯作者：
Yoh Watanabe
中科院分区：
文献类型：
--
作者：
T. Tanabe;Toshiyuki Suzuki;M. Ogura;Yoh Watanabe
据报道，n-3多不饱和脂肪酸（PUFA）在高度洄游物种的脂质中含量丰富，如鲣鱼，Katsuwonus pelamis和其他金枪鱼。1 -9）成年鲣鱼脂质中的二十二碳六烯酸（DHA）含量非常高。鲣鱼的DHA含量在不同器官和季节之间没有差异，通常保持在总脂肪酸的25%以上。albacares和长鳍金枪鱼T. 4 -7）有趣的是，所有这些金枪鱼都具有相同的生化特征。关于金枪鱼中DHA含量高的原因的一个假设是由于DHA潜在的低能量转换效率，DHA在洄游过程中逐渐和最终积累。10）另一方面，除了金枪鱼洄游过程中DHA的最终积累外，金枪鱼中DHA含量高可能是由于金枪鱼特有的生物化学特性，生命早期阶段。为了阐明金枪鱼含有高二十二碳六烯酸的原因，有必要确定金枪鱼在其生活史中何时积累二十二碳六烯酸。但目前还没有关于金枪鱼早期DHA含量的报道。本研究阐明了鲣鱼早期生活阶段的脂肪酸组成。本文重点研究了鲣鱼早期生长阶段脂肪酸中DHA的含量。
It has been reported that n-3 polyunsaturated fatty acids (PUFAs) are abundant in the lipids of highly migratory species, such as skipjack tuna, Katsuwonus pelamis, and other tunas.1-9) The amounts of docosahexaenoic acid (DHA) in the lipids of adult skipjack tuna are remarkably high. The high contents of DHA in skipjack tuna do not vary between different organs and seasons, being usually maintained at more than 25% of the total fatty acids (FAs).1-3) Other tunas like bluefin, Thunnus thynnus, yel lowfin, T. albacares, and albacore, T. alalunga, are known to have the high DHA contents in all organs.4-7) It is interes ting that all of these tunas have the same biochemical character. One hypothesis concerning the reason for the high DHA contents in tunas is gradual and eventual ac cumulations of DHA during the migrations due to a poten tially low energy conversion efficiency of DHA.10) On the other hand, apart from the eventual accumulation of DHA during migration of tunas, the high contents of DHA in tunas may be resulting from a species specific biochemical characteristic to accumulate a sufficient DHA in their tissues from the early life stage. To clarify the rea son why tunas contain high DHA, it is necessary to deter mine when in their life history tunas accumulate DHA. However there are no reports dealing with the DHA con tents in the early life stage of tunas. In the present study, the FA composition of early life stages of skipjack tuna are clarified. We especially focused on the contents of DHA of FAs in the early life stages of skipjack tuna.