Abstract Fishmeal and oil have traditionally been used for aquaculture feed but are being replaced by cheaper ingredients. Fish side-streams are now predominantly used in the production of fishmeal and oil and can account for up to 50 % of the raw material. However, due to the increased competition there is a need to look for alternative high-value products from marine side-streams. The aim of the study was to assess the suitability of zooplankton rich side-streams in a pelagic processing plant (side-stream after heading and gutting, and foam from processing water) for further processing, collected in the summers of 2016–2018, and to investigate the effect of catching variables on the chemical composition and lipid quality of these side-streams. The side-stream after heading and gutting was rich in the long-chain omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), peaking late August, as well as in the monounsatured fatty acid cetoleic acid, C22:1n11. The foam collected from the processing water was rich in monosaturated fatty acids but low in long-chain omega-3 fatty acids. Lipid quality was dependant on the length of the time from catching to processing, with longer time resulting in higher oxidation of lipids. Due to its high lipid content and beneficial fatty acid composition the zooplankton-rich side-stream after heading and gutting is a promising new source of the beforementioned fatty acids and can be recommended to be processed further for human consumption.

中文翻译：

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大西洋鲭鱼（Scomber scombrus）加工过程中富含浮游动物的侧流的化学特征和加工适用性

摘要 鱼粉和鱼油传统上用于水产养殖饲料，但正在被更便宜的成分所取代。鱼副流现在主要用于生产鱼粉和鱼油，占原料的比例高达 50%。然而，由于竞争加剧，需要从海洋侧流中寻找替代的高价值产品。该研究的目的是评估在 2016-2018 年夏季收集的中上层加工厂中富含浮游动物的侧流（抽穗和去内脏后的侧流以及加工水中的泡沫）进行进一步加工的适宜性，以及研究捕捉变量对这些侧流的化学成分和脂质质量的影响。抽穗和去内脏后的侧流富含长链 omega-3 脂肪酸二十碳五烯酸 (EPA) 和二十二碳六烯酸 (DHA)，在 8 月下旬达到顶峰，以及单不饱和脂肪酸鲸蜡油酸 C22:1n11 . 从加工水中收集的泡沫富含单饱和脂肪酸，但长链 omega-3 脂肪酸含量低。脂质质量取决于从捕捞到加工的时间长短，时间越长，脂质氧化程度越高。由于其高脂质含量和有益的脂肪酸组成，抽穗和去内脏后富含浮游动物的侧流是上述脂肪酸的有希望的新来源，可以推荐进一步加工供人类食用。以及单不饱和脂肪酸鲸蜡油酸，C22:1n11。从加工水中收集的泡沫富含单饱和脂肪酸，但长链 omega-3 脂肪酸含量低。脂质质量取决于从捕捞到加工的时间长短，时间越长，脂质氧化程度越高。由于其高脂质含量和有益的脂肪酸组成，抽穗和去内脏后富含浮游动物的侧流是上述脂肪酸的有希望的新来源，可以推荐进一步加工供人类食用。以及单不饱和脂肪酸鲸蜡油酸，C22:1n11。从加工水中收集的泡沫富含单饱和脂肪酸，但长链 omega-3 脂肪酸含量低。脂质质量取决于从捕捞到加工的时间长短，时间越长，脂质氧化程度越高。由于其高脂质含量和有益的脂肪酸组成，抽穗和去内脏后富含浮游动物的侧流是上述脂肪酸的有希望的新来源，可以推荐进一步加工供人类食用。时间越长，脂质的氧化程度越高。由于其高脂质含量和有益的脂肪酸组成，抽穗和去内脏后富含浮游动物的侧流是上述脂肪酸的有希望的新来源，可以推荐进一步加工供人类食用。时间越长，脂质的氧化程度越高。由于其高脂质含量和有益的脂肪酸组成，抽穗和去内脏后富含浮游动物的侧流是上述脂肪酸的有希望的新来源，可以推荐进一步加工供人类食用。