Size-fractionated fish hydrolysate as feed ingredient for rainbow trout (Oncorhynchus mykiss) fed high plant protein diets. I: Growth, growth regulation and feed utilization

摘要: Abstract Six experimental diets were fed to rainbow trout examine the effect of fish hydrolysate and ultra filtered on growth performance, feed utilization regulation using low in dietary meal inclusion. One diet contained a high level plant protein sources (90.6% total protein) (9.4% protein). Two different levels exchange for sources, reducing 73.9% 57.2%, respectively. further identical composition except that was remove molecular weight compounds. A moderate used sixth which had 57.0%. All made equal protein, lipid, energy lysine. The feeding trial lasted 90 days fastest growing group, meal, increased from 149 g at start final 443 g. groups showed significant differences utilizations. Specific rates were; 0.30% day − 1 diet, 0.98% 0.72% group containing hydrolysate, 1.21% diet. Feed efficiencies (g gain per g intake) found be 0.57 0.97 0.83 1.03 Half inclusions revealed values between these ingredients, consumption percentage average day, correlated with efficiency all groups. PER, PPV BV growth. Protein digestibilities groups, while higher lipid than diets. Although some may due inhibitors resources other explanations relevant. Plasma hormone (GH) significantly or is most likely result their poor status. IGF-I not affected by Comparisons similar inclusion thus inhibitors, show removing small compounds reduced. Some seem essential biological performance. Further, as best muscle only nutrient makes an ingredient aqua carnivorous fish. This information important work find replacement sustainable global aquaculture industry.