Dietary phosphorus requirement of crayfish, Astacus leptodactylus

摘要: Dietary phosphorus requirement of narrow-clawed crayfish, Astacus leptodactylus, was determined using five pelleted diets containing equal levels of energy, protein and lipid. Five experimental diets were prepared using a basal diet containing casein, gelatin, dextrin, starch, fish oil, soya oil, vitamin mixture, and mineral mixture tree of phosphorus. Various concentrations of phosphorus (containing of 0, 0.5, 1, 1.5, 2 percentages) provided through adding sodium monodihydrogen phosphate in the basal diet. Crayfish with initial mean weight of 8.16±1.91 g was fed experimental diets for 80 days.