Resolution of the controversial relationship between Pacific and Portuguese oysters internationally and in Vietnam

To address the diversity issues, three hatchery bred populations of C. angulata were screened for allelic variation at nine DNA microsatellite loci. All three lines had high allelic diversity, moderate effective population sizes (Ne), and little evidence of kinship, which, by precedent with other hatchery bred highly fecund oyster species, is a little unexpected. It is speculated that local hatchery practises may involve sharing stock among hatcheries which then may contribute to the maintenance of moderate to high levels of diversity during hatchery reproduction of this highly fecund species.