Fatty acids are important compounds for insects, but the requirements for essential fatty acids may differ between insect species. Most of the fatty acids are acquired through the insect’s diet; therefore, supplementing the diet with baker’s yeast (Saccharomyces cerevisiae Meyen ex E.C. Hansen), which produces unsaturated fatty acids, was predicted to affect the fatty acid composition of the insect. The tested insect was the black soldier fly (BSF) (Hermetia illucens L.), that is used as a source of protein and fat in feed. Therefore, there is importance for BSF larvae (BSFL) nutritional composition, especially the unsaturated fatty acids content, which is one of the nutritional limitations for mammalian diets. The dominant fatty acids of the tested BSFL were the saturated fatty acids: lauric, myristic, and palmitic acids, as found in other BSF studies. Oleic acid (c18:1) and linoleic acid (C18:2) were the abundant unsaturated fatty acids in the BSFL. The proportion of linoleic acid was higher in the substrate with the supplemental yeast; however, this did not affect its proportion in the larvae. The higher proportion of linoleic acid may have been exploited as a source for production of saturated lauric acid. Therefore, providing unsaturated fatty acids to the substrate through supplemental baker’s yeast is not the most efficient way to increase the proportion of unsaturated fatty acids in the larvae.

中文翻译：

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黑水虻（双翅目：Stratiomyidae）幼虫食用面包酵母（酿酒酵母）是否会影响其脂肪酸组成？

脂肪酸是昆虫的重要化合物，但不同昆虫物种对必需脂肪酸的需求可能不同。大多数脂肪酸是通过昆虫的饮食获得的。因此，在饮食中补充产生不饱和脂肪酸的面包酵母（酿酒酵母 Meyen ex EC Hansen）预计会影响昆虫的脂肪酸组成。测试的昆虫是黑水虻 (BSF) (Hermetia illucens L.)，它被用作饲料中蛋白质和脂肪的来源。因此，BSF幼虫（BSFL）的营养成分很重要，特别是不饱和脂肪酸含量，这是哺乳动物饮食的营养限制之一。测试的 BSFL 的主要脂肪酸是饱和脂肪酸：月桂酸、肉豆蔻酸和棕榈酸，正如其他 BSF 研究中发现的那样。油酸(c18:1)和亚油酸(C18:2)是BSFL中丰富的不饱和脂肪酸。添加酵母的底物中亚油酸的比例较高；然而，这并不影响其在幼虫中的比例。较高比例的亚油酸可能已被开发为生产饱和月桂酸的来源。因此，通过补充面包酵母向底物提供不饱和脂肪酸并不是增加幼虫体内不饱和脂肪酸比例的最有效方法。