Abstract

1. 1. Taurine concentrations were determined in various organs dissected from juvenile Macrobrachium rosenbergii. 2. 2. Heart and nervous tissue had the highest taurine concentrations; this suggests that taurine may function in cardiac and neural processes in the prawn. 3. 3. Relative free amino acid concentrations were determined to investigate changes in concentration following acclimation to various salinities. 4. 4. No significant change in taurine concentration in the prawns was demonstrated at any salinity tested. However, the concentration of alanine increased significantly between 15–20%. The elevated alanine concentration suggests it may function in osmoregulation.

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