The Research Result of Development Stages of Scaly giant clam’s Gonad (Tridacna squamosaLamarck, 1819) by Histology Method

Received: 07-06-2012

Accepted: 18-08-2012

DOI:

Views

2

Downloads

0

Issue: Vol. 10 No. 4 (2012)

Section:

CHĂN NUÔI – THÚ Y – THỦY SẢN

How to Cite:

Duy, D., Hung, N., Huong, T., Dung, D., & Ha, N. (2024). The Research Result of Development Stages of Scaly giant clam’s Gonad (Tridacna squamosaLamarck, 1819) by Histology Method. Vietnam Journal of Agricultural Sciences, 10(4), 604–609. http://testtapchi.vnua.edu.vn/index.php/vjasvn/article/view/1675

The Research Result of Development Stages of Scaly giant clam’s Gonad (Tridacna squamosaLamarck, 1819) by Histology Method

Do Anh Duy (*) 1 , Nguyen Quang Hung 1 , Tran Van Huong 1 , Dong Thi Dung 1 , Nguyen Thi Thu Ha 2

  • 1 Viện Nghiên cứu Hải sản - 224 Lê Lai, Ngô Quyền, Hải Phòng
  • 2 Viện Nghiên cứu Nuôi trồng thuỷ sản 1 - Đình Bảng, Từ Sơn, Bắc Ninh

    • Keywords

    Stage, histology, hermaphroditic, scaly giant clam, Tridacna squamosa

    Abstract


    The report presents research results of the development stages of scaly giant clam’s (Tridacna squamosa Lamarck, 1819) gonad in 8 Vietnam islands from 2010 to 2011. The scaly giant clam samples were collected in coral reef (from March to July) and from the divers in Nha Trang Bay and adjacent areas (in months). Histological method was employed to analyze the development stages of gonad. The research results showed that scaly giant clam is a hermaphroditic species. The individuals with the shell length under 18-20cm exhibit maleness character while in individuals with the shell length above 18-20cm the gonad differentiate into spermary and ovary. The development of scaly giant clam’s gonad experiences 6 stages (from stage 0 to stage V). Among them, stage III, the largest size are in the eggs and sperms. The egg cells are round or elliptic in shape and arranged with each other in the ovaries. Diameter of the eggs is measured at 90-110μm. The spermary contains a large quantity of mature sperms; the sperm head size is about 3μm. The research results are useful for identifying each stage of the development of scaly giant clam’s gonad and breeding season through the level of the gonad maturity.

    References

    Braley R.D. (1992). The giant clam: Hatchery and nursery culture manual, ACIAR Mongraph No. 15, 144p.

    English S., C. Wilkinson and V. Baker (1994). Survey Manual for Tropical Marine Resources. The ASEAN-Australia Marine Science Project: Living Coastal Resources by the Australian Institute of Marine Science, 360p.

    Lightner D.V. (1996). A handbook of shrimp pathology and diagnostic procedures for diseases of cultured penaeid shrimp. World Aquaculture Society, Baton Rouge, LA, USA, 305p.

    Nash W.J, R.G. Pearson and Westmore (1988). A histological study of reproduction in the giant clam Tridacna gigas in the North-Central Great Barrier reef. In: Giant Clams in the Asia and the Pacific, pp.89-94.

    Rosewater J. (1965). The family Tridacnidae in the Indo-Pacific. Info-Pacific Mollusca, pp.347-396.

    Đỗ Công Thung, M. Sarti (2004). Bảo tồn đa dạng sinh học dải ven bờ Việt Nam. Tuyển tập báo cáo khoa học. Nhà xuất bản Đại học Quốc gia Hà Nội, 253tr.