A feeding trial was conducted to examine the potential of enzyme‐treated feather meal (EFM) as a fishmeal substitute in the diet of turbot. Fishmeal (650 g/kg) was incrementally replaced (0, 160, 320, 480, 640 and 800 g/kg) by EFM (0, 80, 160, 240, 320, 400 g/kg) to prepare six experimental diets (Control, EFM8, EFM16, EFM24, EFM32 and EFM40). Diet EFM24 was supplemented with lysine and methionine to form seventh diet (EFM24 + AA). The eighth diet was formulated with 240 g/kg steam‐processed feather meal to replace 480 g/kg fishmeal (SFM24). Eight diets were each fed to triplicate groups of juvenile turbot (37.47 g) in a recirculating aquaculture system for 7 weeks. The results showed that fish fed diet EFM24 grew better than those fed SFM24 (p < .05). The growth performance, body composition and serum biochemical indices of fish fed diet EFM8 were not statistically different compared to the control treatment (p > .05). However, further increase in fishmeal replacement (32%–80%) affected negatively growth, nutrients digestibility, serum biochemical indices and body composition (p < .05). Supplementation of lysine and methionine (EFM24 + AA) significantly improved growth performance and diet utilization compared to EFM24 (p < .05). Altogether results suggested that the EFM could comprise 80 g/kg in a diet for juvenile turbot by concurrent reduction of the fishmeal content by 160 g/kg without lysine and methionine supplementation.

中文翻译：

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评估用鱼turbo代替鱼粉替代青少年大菱t日粮中的可行性（Scophthalmus maximus L.）

进行了一项饲喂试验，以检查用酶处理的羽毛粉（EFM）作为鱼粉替代鱼粉的潜力。将鱼粉（650 g / kg）逐渐替换为（0、160、320、480、640和800 g / kg）（EFM（0、80、160、240、320、400 g / kg），以制备六种实验饲料（控制，EFM8，EFM16，EFM24，EFM32和EFM40）。饮食EFM24补充了赖氨酸和蛋氨酸以形成第七种饮食（EFM24 + AA）。第八种日粮采用240 g / kg蒸汽处理的羽毛粉代替480 g / kg鱼粉（SFM24）。在循环水产养殖系统中，将八种日粮分别喂入三组大菱turbo（37.47 g），共7周。结果表明，饲喂日粮EFM24的鱼比饲喂SFM24的鱼生长更好（p <.05）。与对照组相比，饲喂鱼饲料EFM8的生长性能，身体组成和血清生化指标没有统计学差异（p  > .05）。但是，鱼粉替代品的进一步增加（32％–80％）对生长，养分消化率，血清生化指标和身体组成产生负面影响（p  <.05）。与EFM24相比，添加赖氨酸和蛋氨酸（EFM24 + AA）显着改善了生长性能和饮食利用率（p  <.05）。总体结果表明，在不添加赖氨酸和蛋氨酸的情况下，鱼粉含量同时降低160 g / kg时，EFM可以在幼鱼的日粮中占80 g / kg。