In China, six populations of S. serrata were able to be separated based on discriminant
morphometric analysis, with one of the six populations being significantly different
from the other five. However, the most common species of mud crab in China and
Viet Nam is S. paramamosain, which was ascertained by analysis of their mitochondrial
16S rRNA and confirmed by similar analysis using mitochondrial 12S rRNA.
An improved understanding of the genetics of mud crabs has enabled the success
of stock enhancement work to be more accurately gauged. It has also provided a firm
foundation for the conservation of wild mud crabs and is of great value for the future
breeding programmes of domesticated stock.
Figures 1.1–1.4 illustrate the four species of Scylla and details of their claws.