The shift from fish oil to vegetable oil (VO) sources has lowered eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) levels in salmon aquafeeds. VOs are high in omega-6 and low in omega-3 essential fatty acids like EPA and DHA, crucial for fish metabolism and immunity. Algal oil (AO), with high EPA + DHA and lower omega-6 levels supports fish health and growth, but transferring lab-controlled conditions to real-world commercial farming remains a challenge. This study explored the benefits of high dietary EPA + DHA levels through a commercial farm (CF) study in Chile and a Big Data (BD) study in Norway. The CF study, involving 625,000 Atlantic salmon, compared standard feed with AO-supplemented feed. The latter resulted in improved health responses and better fillet quality. The BD study analyzed real data from 232.6 million fish, revealing that EPA + DHA levels > 8% reduce mortality variability by 21%, improve economic feed conversion ratio by 11%, and increase the likelihood of superior harvests by 27%, demonstrating productivity benefits. Both studies emphasize the advantages of feeds with EPA + DHA levels above typical industry practices, enhancing growth, health, and nutritional quality. Importantly, the BD study complements the CF study, bridging the gap between science and aquafarms, and providing evidence that diets with EPA + DHA > 8% offer biological performance benefits for farmers, regardless of farming environments.

中文翻译：

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养殖大西洋鲑鱼的最佳二十碳五烯酸 + 二十二碳六烯酸水平：缩小科学与商业实践之间的差距


从鱼油转向植物油 (VO) 来源降低了鲑鱼水产饲料中二十碳五烯酸 (EPA) 和二十二碳六烯酸 (DHA) 的含量。 VO 中的 omega-6 含量较高，而 omega-3 必需脂肪酸（如 EPA 和 DHA）含量较低，这些脂肪酸对鱼类的新陈代谢和免疫力至关重要。藻油 (AO) 具有高 EPA + DHA 和较低的 omega-6 水平，有助于鱼类健康和生长，但将实验室控制的条件转移到现实世界的商业养殖仍然是一个挑战。本研究通过智利的商业农场 (CF) 研究和挪威的大数据 (BD) 研究探索了高膳食 EPA + DHA 水平的益处。 CF 研究涉及 625,000 条大西洋鲑鱼，对标准饲料和添加 AO 的饲料进行了比较。后者改善了健康反应并提高了鱼片质量。 BD 研究分析了 2.326 亿条鱼的真实数据，表明 EPA + DHA 水平 > 8% 可将死亡率变异性降低 21%，将经济饲料转化率提高 11%，并将获得丰收的可能性提高 27%，从而证明了生产力优势。这两项研究都强调了 EPA + DHA 含量高于典型行业惯例的饲料的优势，可促进生长、健康和营养质量。重要的是，BD 研究补充了 CF 研究，缩小了科学与水产养殖场之间的差距，并提供证据表明，无论养殖环境如何，EPA + DHA > 8% 的饮食都能为农民提供生物性能益处。