PHÂN BỐ TRAI TAI TƯỢNG VẢY (Tridacna squamosa Lamarck, 1819) TRÊN RẠN SAN HÔ VỊNH NHA TRANG VÀ KẾT QUẢ BƯỚC ĐẦU NUÔI THỬ NGHIỆM Ở ĐẦM BÁY

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DISTRIBUTION OF SCALED CLAM, Tridacna squamosa LAMARCK, 1819, AT NHA TRANG BAY AND INITIAL DATA ON CULTURE AT DAM BAY

Survey on the status of scaled clam at Dam Bay, Hon Mun, Bich Dam and culture trial on the coral reef showed that: Density of scaled clam at Dam Bay, Hon Mun and Bich Dam was 0.233 ind/500m². The clam were mainly distributed at the coral reef, burrows or the lower area. Fifty percent (55%) of the clam were found from the reef surfacce; 35% on the reef slope and the remaining on the reef base. The clam were found at the water deepth from 2 to 15 m at the study site. Growth in shell length of the rared clam was 0.1 to 0.31 cm/month, growth in shell wide was 0.03 to 0.13 cm/month and growth in weight was 2.01-13.00 g/month. Survival of the clam was 92.0% when culture at 3 to 5 m of water depth and was 85.3% at the 1 to 2 m water depth. The results suggest that the scaled clam can be cultured at Dam Bay for conservation purpose.