クルマエビの精製合成飼料に関する研究-IV

蛋白の一部をアミノ酸で代替した飼料による飼育試験

抄録

Prawns, Penaeus japonicus, were kept on purified test diets, which contained casein-albumin (10:1), amino acids, and their mixture as a nitrogen source for 4 weeks. The level of the nitrogen source was settled at 50, 37.5 and 25% for both the protein and amino acid test diet, while at 50% for diets containing a mixture of protein and amino acids.
The best growth was obtained with the diet containing protein at a 50% level, followed by diets containing protein at 37.5% and 25% levels as nitrogen source in that order. The diets containing only amino acids brought about a very poor growth, low feed intake and high mortality, regardless of their levels in diets. Increase in the rate of protein to amino acids in the nitrogen source improved both growth and feed intake and lowered mortality, suggesting that free amino acids are far inferior to protein as nitrogen source for prawn.