Building a set of criteria for selection of natural clam beds (Lutraria rhynchaena, Jonas 1844) as broodstock source for seed production and gene conservation in Cat Ba - Ha Long bay

Do Manh Hao, Dao Thi Anh Tuyet, Nguyen Tien Dat, Hoang Thi Thanh Nga, Le Minh Hiep, Nguyen Van Quan


Building on a set of criteria used as a scientific basis for conservation zoning of natural marine resources is essential. In this study, we propose the set of criteria to select the suitable natural clam beds of Lutraria rhynchaena for protection priority from 16 sites in Cat Ba - Ha Long bay. Research results have built a set of 13 different criteria, including area, density, benthic substrate, food organisms, turbidity, water flow, water depth, predators, salinity, benthic organisms, pollution, area location and zoning conflicts. The criteria are divided into 5 groups, in which the area and density have the highest coefficent of 5, followed by the zoning conflict with the coefficient of 4, the pollution with the coefficient of 3, the efficient of benthic substrate and  water flow is 2, the remaining criteria have a same coefficient of 1. The highest points are evaluated at Tung Sau bed (station 12) with a score of 254 points, followed by Van Boi beach (station 7) with a score of 235 points, the bed is in Trinh Nu Cave (Station 13) with a score of 229 points, which are proposed to be prioritized sites for conservation.


Natural clam beds, Lutraria rhynchaena, Cat Ba - Ha Long bay, set of criteria, seed production, gene conservation.

Full Text:



Truong Ty, 1960. Mollusca in the Eastern Sea. Science Publisher, Beijing. (in Chinese).

Abbott, R. T., and Dance, S. P., 1983. Compedium of seashells. A color guide to more than 4.200 of the World’s Marine Shells, EP Dutton. Inc, New York.

Nguyen Xuan Duc, 1990. Some survey results on the reserve and the biological features of the Snout Otter Clams (Latraria philippinarum Deshayes) in Cat Ba island. The proceedings of science reports on ecology and biological resources. Publisher of Natural Science, 132–135. (in Vietnamese).

Pham Thuoc (eds.), 2008. Snout Otter Clams (Lutraria rhynchaena Jonas, 1844): Some important economic species in the sea area of Hai Phong – Quang Ninh. Agriculture Publishing House, 90 p. (in Vietnamese).

Asokan, P. K., Laxmilatha, P., Surendranath, V. G., and Sivadasan, M. P., 2011. Site selection for Mussel Culture. Calicut Research Centre of Central Marine Fisheries Research Institute, West Hill, P.O. Calicut – 673005. Kerala. Vishakapatnam Regional Centre. CMFRI, Vishakapatnam, Andhra Pradesh, 19-26.

Ha Duc Thang, Dinh Thuy Ha, Nguyen Xuan Doc, 2006. Initial results of the research on artificial seed production Lutraria philippinarum. Journal of Fisheries, 6, 19–23. (in Vietnamese).

DOI: Display counter: Abstract : 232 views. PDF : 61 views.

Editorial Office:

Vietnam Journal of Marine Science and Technology

1st Floor, A16 Building, 18 Hoang Quoc Viet Street, Cau Giay District, Hanoi, Vietnam

Tel: (+84) 024 3791 7411