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The free amino acid - profiles of the pond-cultured giant freshwater prawn, Macrobrachium rosenbergii were evaluated. The M. rosenbergii was collected from the natural pond culture sites that showed reasonably good growth and survival of adults of male, female and stunted animals. Totally 15 amino acids were detected in normal male and female adults. Whereas 14 amino acids were detected in the stunted animals and threonine was not detected in the stunted animal. Three non-essential amino acids, four conditional essential amino acids, and eight essential amino acids were recorded in the tissues of M. rosenbergii. The aspartic acid contributed a higher value in all three tissue samples; 185.3, 138.76, and 274.09 µL/mL in male, female and stunted animals respectively. The arginine was found to be the lowest value in the male (2.5 µL/mL) and in the stunted animals (3.78 µL/mL) but in the normal male the glycine was the lowest value (2.38 µL/mL). In the normal male, tyrosine, serine, and glutamic acid were at the highest concentrations but in the normal female, the glutamic acid, Leucine, and tyrosine contributed to the higher-level amino acids. However, in the stunted one, serine, leucine, and histidine (96.98, 81.62, and 63.59 µl/ml, respectively) showed the same values as glutamic and tyrosine. The overall amount of essential amino acids was higher in female prawns than in male and stunted ones. In contrast, the non-essential amino acid content was higher in the stunted shrimp. Therefore, stunted prawns can be used as good nutritional food for human consumption. |
