ISSN : 1225-3480
In the present study, we monitored the early development of Saccostrea kegakia subtropical oyster speciesdistributing on rocky intertidal off the northern Jeju Island using scanning electron microscope (SEM). The femaleoyster collected in early August, 2012 were fully mature exhibiting relatively small eggs (46.5 ± 1.4 μm in diameter)in the gonad, while testis of the mature male oysters were filled with fully developed sperms of 36.9 μm in length. The fertilized eggs developed into 2-cell stage with polar body after 1 hr 20 min of fertilization, then followed byMorula stage (3 hr 20 min), Blastula stage (4 hr 50 min), Gastrula stage (7 hr), and trochophore larvae stage (9 hr30 min). The observed early development of S. kegaki in this study was similar the early development of otheroysters, although size of the fertilized eggs were somewhat smaller.
과학기술부 (2005) 제주 해양생물 자원의 정보 및 추출물 은행구축 (제주연안 무척추동물 다양성 조사연구). 과학기술부,118p
Choi, K.S., Je, J.G., Lee, J.J. (2000) Commercially exploitable marine bivalves in Jeju island. Underwater Science & Technology, 2: 29-38.
Damiens, G., Mouneyrac, C., Quiniou, F., His, E., Gnassia-Barelli, G., Romeeo, M. (2006) Metal bioaccumulation and metallothionein concentrations in larvae of Crassostrea gigas. Environmental Pollution, 140: 492-499.
Franzen, A. (1983) Ultrastructural studies of spermatozoa in three bivalve species with notes on evolution of elongated sperm nucleus in primitive spermatozoa. Gamete Research, 7: 199-214.
Healy, J.M., Lester, R.J.G. (1991) Sperm ultrastructure in the Australian oyster Saccostrea comer Cialis (Iredale & Roughley) (Bivalvia: Ostreoidea), Journal of Molluscan Studies, 57: 219-224.
Hur, Y.B., Hur, S.B. (2000) Development and growth of larvae of four bivalve species. Journal of Aquaculture, 13: 119-128.
Kakoi, S., Kin, K., Miyazaki, K., Wada, H. (2008) Early development of the Japanese spiny oyster (Saccostrea kegaki): Characterization of some genetic markers. Zoological Science, 25: 455-464.
Kalyanasundaram, M., Ramamoorthi, K. (1987) Larval development of the oyster Saccostrea cucullata (Born). Mahasagar-Bulletin of the National Institute of Oceanography, 20: 53-58.
Kim, B.K., Kang, D.H., Ko, D.K., Yang, H.S., Kim, D.K., Kang, C.K., Choi, S.K. (2010) Annual reproductive cycle of the oyster, Saccostrea kegaki (Torigoe & Inaba 1981) on the southern coast of Jeju island, Korea. Invertebrate Reproduction and Development, 54:19-26.
Lam, K., Morton, B. (2006) Morphological and mitochondrial-DNA analysis of The indo-west Pacific rock oysters (Ostreidae: Saccostreaspecies). Journal of Molluscan Studies, 72: 235-245.
Lee, H.J., Kang, H.S., Park, K.I., Choi, S.K. (2012). Quantification of reproductive effort and microscopic observation on the larval development of Manila clam Ruditapes philippinarum (Adams and Reeve, 1850). Malacological Society of Korea, 28(2): 145-156.
Min, D.K. (2004) Mollusks in Korea. 401pp, Hangul Graphics. Busan
Moueza, M., Gros, O., Frenkiel, L. (1999) Embryonic, larval and postlarval development of the tropical clam, Anomalocardia brasiliana (Bivalvia, Veneridae). Journal of Molluscan Strdies, 65: 73-88.
Okutani, T. (2000) Marine mollusks in Japan. 927pp, Tokai University. Japan
Poppe, G.T. (2010) Philippine marine mollusks: III. Gastropoda Part 3 and Bivalvia Part 1, 665pp, Hackenheim. Philippine
Samuel, D. (1983) Early larval development of Edible oyster Crassostrea madrasensis (Perston). Proceedings of the symposium on coastal aquaculture, 2: 483-487.
Silberfeld, T., Gros, O. (2006) Embryonic development of the tropical bivalve Tivela mactroides (Bron, 1778) (Veneridae: subfamily Meretricinae): a SEM study. Cahiers de Biologie Marine, 27: 243-251.
Torigoe, K. (1999) The distribution of Saccostrea kegaki in the inland sea of Seto. Bulletin of the Faculty of School Education Hiroshima University, 21: 25-29.
Yang, H.S., Choi, S.K. (2011) A field guide to the Jeju seashore. 160-161pp, The Ministry of Land, Transport and Maritime Affairs and Jeju Sea Grant. Jeju
Yurchenko, O.V. (2012) Comparative ultrastructure study of spermatozoa in some oyster species from the Asian-Pacific coast. Micron, 43: 365-373.
