Citation:H.M.P. Kithsiri, M.J.S.Wijeyaratne and U.S.Amarasinghe, Factors affecting the abundance of three commercially important bivalve species (Family: Veneridae) in Puttalam Lagoon and Dutch Bay, Sri Lanka. First Annual Scientific Session of the Sri Lanka Association for Fisheries and Aquatic Resources, Colombo, Sri Lanka.