The present study was designed to assess the alternate environmental friendly source of protein; here we report the suitability of soybean meal as a plant protein source for partial replacement of fishmeal in the diet of Arabian yellowfin seabream Acanthopagrus arabicus; reared in floating net cages. A total of 56 days feeding trial was conducted to evaluate the growth performance, feed utilization, survival, and carcass composition of the juveniles. Triplicate groups (30 fish/cage) of A. arabicus (initial weight 22.61 ± 0.11 g) were stocked in floating net cages (1.5 × 1.5 × 1.5 m). Five semi-purified experimental diets, each containing 42% dietary protein, were prepared where fishmeal was replaced with soybean meal: 0% (control), 20% (SBM20), 40% (SBM40), 60% (SBM60) and 80% (SBM80). Fish were fed twice daily at 7% body weight. The formulated diet was well accepted by the fish, where, 100% of survival was recorded at the end of the experiment. No significant differences (P > 0.05) were observed in final weight gain (WG) and specific growth rate (SGR) of juvenile Arabian yellowfin seabream fed on SBM20 and SBM40 diets compared to the control diet. However, a decline in growth performance was recorded in fish received SBM60 and SBM80 diets. Poor feed conversion ratio (FCR) was observed for fish fed with increasing dietary soybean meal above SBM40. No significant differences (P > 0.05) were found in the final whole-body carcass composition of proteins, moisture, and ash. However, the lipid content in the fish body increased significantly (P < 0.05) with an increasing soybean meal and fish oil in the diets. Our results showed that 40% of SBM could substitute fishmeal without jeopardizing the health and growth of Arabian yellowfin seabream.

本研究旨在评估蛋白质的替代环境友好来源。在这里，我们报道了豆粕作为阿拉伯黄鳍海鲷Acanthopagrus arabicus饮食中部分替代鱼粉的植物蛋白来源的适用性；在浮网笼中饲养。总共进行了56天的喂养试验，以评估其生长性能，饲料利用率，存活率和and体组成。一式三份组（30鱼/笼）A. arabicus（初始重量22.61±0.11 g）放入网箱（1.5×1.5×1.5 m）中。准备了五种半纯化的实验饮食，每种饮食均含42％的饮食蛋白质，其中鱼粉被豆粕代替：0％（对照），20％（SBM20），40％（SBM40），60％（SBM60）和80％ （SBM80）。鱼以7％的体重每天喂两次。鱼类完全接受了配方饮食，在实验结束时记录了100％的存活率。与对照饮食相比，以SBM20和SBM40饮食喂养的阿拉伯阿拉伯黄鳍鲷的最终体重增加（WG）和比生长速率（SGR）没有观察到显着差异（P> 0.05）。但是，接受SBM60和SBM80日粮的鱼的生长性能下降。饲喂日粮豆粕高于SBM40的鱼饲料转化率（FCR）较差。在最终的全身moisture体蛋白质，水分和灰分中没有发现显着差异（P> 0.05）。然而，随着豆粕和日粮中鱼油含量的增加，鱼体内的脂质含量显着增加（P <0.05）。我们的研究结果表明，40％的SBM可以代替鱼粉而不会危害阿拉伯黄鳍鲷的健康和生长。