Abstract

The amount of structural and storage lipids and the composition of fatty acids (FA) in the symbiotic hydroid coral Millepora dichotoma were determined monthly throughout the year. In the first half of the year, the hydrocoral actively accumulated lipids, as indicated by a twofold increase in the content of reserve lipid classes of (waxes, triglycerides, and monoalkyl diacyl glycerides) concurrent with a relatively stable level of polar phospholipids (PL) and sterols. There was a decrease in the proportion between choline and ethanolamine glycerophospholipids (PC/PE) in July, a sharp drop in the content of triglycerides in August, and a large dispersion the PL values in September, which may be due to energy expenditures and structural changes in the colonies during spawning. The level of 22:6n-3, which is synthesized in hydrocoral from FA of plankton, was maximum in the summer, and the level of 18:4n-3, the FA marker of photosynthetic symbionts, doubled in the winter. This indicates the predominance of the heterotrophic mode of nutrition in M. dichotoma in the summer and an increased role of symbionts (an autotrophic food source) in the winter with a drop in water temperature and the onset of a stormy period.

中文翻译：

---

1775年来自越南沿海水域的水珊瑚Millepora dichotomaForskål中极性脂质，贮藏脂质和脂肪酸标记物组成的年度动态

摘要

共生水合珊瑚Millepora dichotoma中结构脂质和贮藏脂质的含量以及脂肪酸（FA）的组成在全年中每月确定一次。在上半年，水珊瑚活跃地积聚了脂质，如（蜡，甘油三酸酯和单烷基二酰基甘油酯）的储备脂质类别含量增加了两倍，同时极性磷脂（PL）的水平相对稳定和固醇。7月份胆碱和乙醇胺甘油磷脂（PC / PE）的比例下降，8月份甘油三酯含量急剧下降，9月份的PL值分散较大，这可能是由于能量消耗和结构产卵期间菌落的变化。浮游生物的FA在水生珊瑚中合成的22：6n-3的水平在夏季达到最高，而光合作用共生体的FA标志物18：4n-3的水平在冬季增加了一倍。M.萁在夏季和共生的冬季发挥更大的作用（自养的食物来源）随着水温的下降，一个风雨交加的时期的开始。