Genetic population structure of the blue sea star (Linckia laevigata) and the boring giant clam (Tridacna crocea) across Malaysia

Abstract Various studies on population genetics in the Indo-Pacific that include Coral Triangle region have revealed phylogeographic patterns marine species populations. However, little is known about structure and connectivity pattern among coral reefs four seas surrounding Malaysia: Strait of Malacca (Andaman Sea), South China Sea, Sulu Sulawesi Sea. In view this, we examined genetic two invertebrate species: blue sea star ( Linckia laevigata ) boring clam Tridacna crocea from seven localities across Malaysia, including Pulau Layang-Layang Spratly Islands. Additional samples L. were obtained Davao Gulf, Philippines. The analyses based partial mitochondrial cytochrome oxidase I sequences T. . Populations showed departure neutrality, indicating selection or expansion. a mismatch analysis suggested Lack (Φ ST = − 0.001, P 0.399) implies high sampled reef sites. There was subtle structuring populations 0.032, 0.009), but AMOVA did not detect any priori groupings. scale are most likely attributed to life history traits giant species, also geological seasonal current region.