Abstract
AbstractTerrestrial decapods have significant levels of ammonia, uric acid and free amino acids in their blood, but blood is hypo‐osmotic to local seawater by as much as 300 mOsm/kg. Blood water content is approximately 90%, with protein making up virtually all the difference, whereas tissue water is between 70% and 80%. The tissue free amino acid pool is composed primarily of glycine, serine, proline, alanine and arginine, which are typical of all crustaceans. The size of the muscle pool is reduced in comparison to aquatic species, while that of gill is comparable. Tissue ammonia levels are very low in comparison to FAA, but these levels are significantly higher in gill than in muscle.
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