sample population genomic study of rapd pcr-dna analysis in scylla serrata and scylla tranqubarica collected from two niches of chennai coast

Among the four species of mud crab two species viz., Scylla serrata and Scylla tranqubarica were found distributed in Kovalam and Pulicat estuary regions of Bay of Bengal east coast (Chennai). They represent genetically distinct sympatric populations as revealed by RAPD PCR. Among the two populations S. tranqubarica revealed conserved DNA similarity between them. Two species S. serrata and S. Tranqubarica represent genetically isolated sympatric non-congeners. The two populations of S. tranqubarica viz., Kovalam and Pulicat represent congeners with genetic exchanges and inbreeding potential. The Pulicat crabs also constitute the ideal forms for culture activities for environmental reasons.