White shrimp, Penaeus vannamei , kept in laboratory aquaria at a salinity of 35 parts per thousand (ppt) were subjected to increased and decreased salinity changes by either 5, 15 or 25 ppt. Shrimp were periodically removed from the aquaria and analyzed for total free amino acid nitrogen and also specific free amino acid composition. Decreasing salinities resulted in corresponding decreases in free amino acid concentration; minimum values were reached after 24 ‐ 48 hr. Increasing salinities were likewise shown to result in corresponding increases in the tissue free amino acid concentration with maximum values being reachedin 24 hr. Glycine, proline, arginine, serine/threonine, and alanine were the most significant contributors, comprising from 93 ‐ 96% of the total free amino acid pool.
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McCoid et al. (1984) studied this question.
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