Quantification of arginine requirements of juvenile marine shrimp,Penaeus monodon, using microencapsulated arginine

✍ Scribed by H.-Y. Chen; Y.-T. Leu; I. Roelants

• Book ID: 104734287
• Publisher: Springer-Verlag
• Year: 1992
• Tongue: English
• Weight: 514 KB
• Volume: 114
• Category: Article
• ISSN: 0025-3162
• DOI: 10.1007/bf00349523

✦ Synopsis

Using microencapsulated L-arginine, the quantitative requirement for amino acid has been determined for the first time for a shrimp species, which can not effectively utilize crystalline amino acids. In an 8 wk feeding trial (1990), juvenile Penaeus monodon were fed caseinbased purified diets containing one of six levels (I3. 1, 17.7, 22.3, 26.9, 31.5 and 36.1 g/kg diet) of arginine. In addition to the protein-bound argimne already present in the casein of the test diets, pure arginine was supplemented by L-arginine microencapsulated in cellulose acetate phthalate, which is easily assimilated. The arginine level required for optimal growth was determined by brokenline model analysis of weight gain data to be 25.0 g/kg diet (= 54.7 g/kg protein). Examination of the hemolymph 3 h after feeding revealed that the free arginine level in the hemolymph had not increased as a result of increasing levels of the dietary arginine. There was an abrupt increase of urea in the hemolymph when the arNnine requirement of the shrimp had been met.