One of the most widely cultured finfish in the world is the Atlantic Salmon Salmo salar, with over 2 million metric tons produced per year. Atlantic Salmon fillets are widely accepted by consumers as a source of long‐chain omega‐3 fatty acids, particularly eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). As feed producers shift from using marine ingredients to more terrestrial ingredients, producers need to monitor the fatty acid profiles of the fillets. Juvenile Atlantic Salmon (~280 g) were fed one of four diets during a 16‐week feeding trial. The four diets were formulated with increasing amounts (0, 5, 10, and 15%) of a DHA‐rich, whole dried algae (DHA = 20.3%) to reduce fish oil (12.7, 7.85, 3.00, and 0%, respectively). There were no significant differences in weight gain, feed efficiency, or the thermal growth coefficient. The proximate composition of the whole fish also did not vary due to dietary treatment. The amount of DHA in the fillets increased with increasing inclusion of the DHA‐rich algal biomass. The organoleptic properties (basic and aromatic tastes) also did not vary due to diet. The apparent digestibility coefficient was about 66%. Overall, including a heterotrophic algal biomass in the diets of Atlantic Salmon while reducing fish oil supported equivalent growth while maintaining levels of long‐chain omega‐3 fatty acids in the fillets.

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大西洋鲑熏制含有异养藻类生物质的日粮替代鱼油的生长性能

大西洋鲑Salmo salar是世界上养殖最广泛的有鳍鱼之一，每年生产超过200万吨。大西洋鲑鱼片被消费者广泛接受为长链omega-3脂肪酸的来源，尤其是二十碳五烯酸（EPA）和二十二碳六烯酸（DHA）。随着饲料生产商从使用海洋原料转变为更多的陆地原料，生产商需要监控鱼片的脂肪酸谱。在为期16周的喂养试验中，向大西洋鲑幼鱼（〜280 g）喂养了四种饮食之一。四种日粮中添加了增加量（0％，5％，10％和15％）的富含DHA的全干藻（DHA = 20.3％），以减少鱼油（分别为12.7％，7.85％，3.00％和0％） ）。增重，饲料效率或热生长系数无显着差异。整个鱼的最接近组成也没有因饮食处理而变化。圆角中DHA的含量随着富含DHA的藻类生物量的增加而增加。饮食方面，感官特性（基本和芳香口味）也没有变化。表观消化率约为66％。总体而言，在大西洋鲑鱼的饮食中包括异养藻类生物质，同时减少鱼油，可支持同等生长，同时维持鱼片中长链omega-3脂肪酸的水平。