Novel sources of omega‐3 fatty acids (FAs) are essential for the sustainable development of the aquaculture industry. In the present study, we assessed the response of the fish to a novel algal oil as a source of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) for rainbow trout (Oncorhynchus mykiss) diets. Our results show that the palatability of the diets was maintained with high inclusion levels (up to 10%) of algal oil. The digestibility of omega‐3 FAs was compared among diets containing 10% fish oil (control diet) and diets with no omega‐3 lipid sources (0AO) or increasing levels of algal oil (2.5, 5, and 10% for diets 2.5AO, 5AO, and 10AO, respectively). The digestibility of EPA and DHA was above 99% and was only significantly decreased in the 0AO diet. The FA profile of the muscle was found to reflect that of the diets, suggesting that, when high levels of omega‐3 are included in the diet of rainbow trout, they are deposited in the muscle rather than used for metabolic processes. The growth and the blood parameters of the animals were optimal for all the treatments in the safety trial, with algal oil inclusion levels up to 6%. All these results in combination show that Veramaris® algal oil containing EPA and DHA can be used as an efficient source of omega‐3 FAs for salmonids.

中文翻译：

---

含有EPA和DHA的新型海洋藻油是虹鳟鱼（Oncorhynchus mykiss）的有效ω-3脂肪酸来源

Omega-3脂肪酸（FAs）的新来源对于水产养殖业的可持续发展至关重要。在本研究中，我们评估了鱼类对新型藻油的反应，该藻油是虹鳟鱼（Oncorhynchus mykiss）的二十碳五烯酸（EPA）和二十二碳六烯酸（DHA）的来源）饮食。我们的结果表明，藻油的高包合水平（高达10％）可以保持饮食的适口性。比较了含10％鱼油的日粮（对照日粮）和不含omega-3脂质源（0AO）或日粮中藻油水平增高的日粮（2.5AO，2.5％，5％和10％日粮2.5AO）的omega-3 FAs的消化率，5AO和10AO）。EPA和DHA的消化率超过99％，在0AO饮食中仅显着降低。发现肌肉的FA轮廓反映了饮食结构，这表明，当虹鳟鱼饮食中包含高水平的omega-3时，它们会沉积在肌肉中，而不是用于代谢过程。在安全性试验中，动物的生长和血液参数对于所有治疗都是最佳的，藻油的含量最高为6％。