Soy protein concentrate (SPC) rarely replaces fishmeal (FM) completely in marine finfish diets without eliciting adverse effects on fish performances. The inclusion of brown seaweed (Sargassum fulvellum) could alleviate the negative effects linked to high SPC dietary inclusion. In the current study, the dietary effects of S. fulvellum inclusion in diets for Japanese flounder (Paralichthys olivaceus) in which FM was partially replaced with SPC were evaluated. A FM-based positive control (Con+) diet with FM protein partially replaced with SPC protein (Con−) was supplemented with S. fulvellum at levels of 30, 60 and 90 g/kg to formulate SF3, SF6 and SF9 diets, respectively. The five diets were fed to fish (0.52 g) in triplicate groups up to apparent satiety for 56 days. The dietary brown seaweed significantly increased (p < .05) growth performance, showing significantly higher per cent weight gain (p < .05) and specific growth rate in fish fed SF6 and SF9 compared to other treatments. Seaweed inclusion also significantly increased (p < .05) feed intake and feed utilization performances. Fish fed Con− diet exhibited significantly lower (p < .05) growth and feed utilization performances. The highest muscular and hepatic total lipids were observed in fish fed Con+. Seaweed inclusion significantly increased and decreased (p < .05) muscular and hepatic total lipid contents, respectively, when compared to Con− diet. The muscle fatty acids were not significantly (p > .05) affected by dietary S. fulvellum. Hepatic Σn-3 and Σn-3+Σn-6 fatty acids were significantly higher (p < .05) in supplemented groups compared to Con+ and Con−. Finally, S. fulvellum inclusion at 60 g/kg is found to be beneficial for increasing growth, feed utilization and some fatty acid restoration in SPC-incorporated Japanese flounder fry diets.

中文翻译：

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在日本比目鱼（Paralichthys olivaceus）幼鱼的日粮中加入褐海藻（Sargassum fulvellum），鱼粉部分替换为大豆蛋白浓缩物

大豆浓缩蛋白 (SPC) 很少在海洋有鳍鱼饲料中完全替代鱼粉 (FM)，而不会对鱼类性能产生不利影响。加入棕色海藻（Sargassum fulvellum）可以减轻与高 SPC 饮食相关的负面影响。在目前的研究中，S的饮食影响。 对日本比目鱼 ( Paralichthys olivaceus )日粮中的fulvellum进行了评估，其中 FM 部分被 SPC 替代。与FM基于蛋白质的FM-A阳性对照组（CON +）饮食与SPC蛋白（CON-）补充有部分取代小号。 富勒姆 分别以 30、60 和 90 g/kg 的水平配制 SF3、SF6 和 SF9 日粮。将五种饮食分三组喂给鱼（0.52 克），直至达到明显饱腹感 56 天。 与其他处理相比，饲喂 SF6 和 SF9 的鱼的日粮褐海藻显着提高了 ( p  < .05) 的生长性能，显示出显着更高的增重百分比 ( p < .05) 和特定生长率。加入海藻也显着提高了 ( p  < .05) 的采食量和饲料利用率。喂食 Con- 饮食的鱼表现出显着降低 ( p  < .05) 的生长和饲料利用性能。在喂食 Con+ 的鱼中观察到最高的肌肉和肝脏总脂质。海藻夹杂物显着增加和减少（p  < .05) 肌肉和肝脏的总脂质含量，分别与健康饮食相比。肌肉脂肪酸 不受饮食S 的显着影响 ( p > .05) 。 富勒姆。 与 Con+ 和 Con- 相比，补充组的肝脏 Σn-3 和 Σn-3+Σn-6 脂肪酸显着更高 ( p < .05)。最后，S。 发现 60 g/kg 的fulvellum有利于增加添加 SPC 的日本比目鱼鱼苗日粮的生长、饲料利用率和一些脂肪酸的恢复。