クルマエビの精製合成飼料に関する研究-VI
アミノ酸試験飼料における各アミノ酸の吸収率
1976 年 42 巻 3 号 p. 331-335
詳細
1976 年 42 巻 3 号 p. 331-335
In connection with our previous observations that prawn, Penaeus japonicus, fed on an amino acid test diet showed poor growth, we have determined the absorption rates for 17 amino acids derived from the amino acid test diet for three different regions of the alimentary tract. An indirect method using chromic oxide as an indicator was employed to estimate the absorption rate. The results obtained were compared with those for a casein-albumin test diet.
The absorption rates of total amino acids in test diets compounded from crystalline amino acids or casein-albumin as nitrogen source were 85.0% and 81.1%, respectively. Dietary amino acids were assimilated mainly in the hepatopancreatic region between the proventriculus and fore-intestine of the alimentary tract, while only a few were absorbed in the postintestinal region.
Of the 17 amino acids tested, remarkably high cancentrations of glycine occurred in the contents of alimentary tract resulting in highly negative values for the apparent absorption rate. This suggests that the glycine in the alimentary tract is presumably of metabolic origin.
