ISSN : 1225-3480
The gonad index, reproductive cycle and first sexual maturity of Sinonovacula constricta collected from Simpo, Kimje-gun, Korea were investigated by histological analysis. The gonad index (GI) in both sexes of S. constricta increased from April and reached a maximum in July when the water temperature rapidly increased. And then, the GI values gradually decreased by spawning from August through October. Monthly variations in the GI showed a close relationship with ovarian development. The reproductive cycle in females and males can be classified into five successive stages: early active stage (March to June), late active stage (May to July), ripe stage (July to September), partially spawned stage (August to October), spent/inactive stage (October to March). The percentage of first sexual maturations in female and male clams of 50.1-60.0 mm in shell length was over 50%, and for clams over 70.1 mm in shell length, it was 100%. Because harvesting clams < 50.1 mm in shell length could potentially cause a drastic reduction in recruitment, a measure including a prohibitory fishing size should be taken for adequate improved fisheries resource management.
Chung, E.Y, (2005) Germ cell differentiation and sexual maturation of the hanging cultured female scallop Patinopecten yessoensis on the east coast of Korea, Journal of Shellfish Research
Chung,E.Y, (2007) Oogenesis and sexual maturation in Meretrix lusoria (RÖding, 1798) (Bivalvia: Veneridae) in western Korea, Journal of Shellfish Research
정의영 ; 한지수 ; 김종배 ; 이창훈, (2005) 가리맛조개, Sinonovacula constricta의 생식소 발달단계에 따른 일부 조직의 생화학적 성분 변화, The Korean Journal of Malacology
Ko, C.H, (1997) Growth and production of Sinonovacula constrica (Bivalvia) from the Hwaseong tidal flat in the Namyang Bay, Korea, Journal of Oceanography Society of Korea
Kwon, O.K, (1993) Coloured shells of Korea, Academy Publishing Co., Seoul
Lee, J.S, (2002) A study on the natural variation of tissue metal concentrations in razor clam, Sinonovacula constricta (Lamarck) form mudflat in the Namyang Bay, Ph. D. thesis, Seoul National University
Lin, B, (1990) Temperature and salinity in relation to the survival, growth and development of the larvae and spat of Sinonovacula constricta, Journal of Fish. China/Shuichan Xuebao
Mann,R, (1979) Some biochemical and physiological aspects of growth and gametogenesis in Crassostrea gigas and Ostrea edulis grown at sustained elevated temperatures, Journal of Marine Biological Assocition UK
Sastry,A.N, (1966) Temperature effects in reproduction of the bay scallop, Aquipecten lrradians Lamarck, Biological Bulletin
Sastry, A.N, (1968) Relationship among food, temperature and gonad development of the bay scallop, Aquipecten lrradians Lamarck, Physiological Zoology
Sastry,A.N, (1970) Reproductive physiological variation in latitudinally separated population of the bay scallop, Aquipecten lrradians Lamarck, Biological Bulletin
Wang, W.X, (1997) Larval swimming and postlarval drifting behavior in the infaunal bivalve Sinonovacula constricta, Marine Ecology Progress Series
Wu, T, (1987) Effects of several environmental factors on survival rate of young shells of Sinonovacula constricta (Lamarck), Journal of Oceanography of Taiwan trait/Taiwan Haixia
Yoo, J.S, (1976) Korean shells in colour, Ilgisa, Seoul
Yoshimoto, M, (1989) Ecological study of jack knife clam, Sinonovacula constricta-IV. Growth and survival of cultured clam, properties of mud in the culture ground and its improvement by scattering sands in clams bed, Bulletin of Saga Prefecture Ariake Fisheries Experimental Station
Yoshimoto,M, (1989) Ecological study of jack knife clam, Sinonovacula constricta-V. Fluctuation of physiological indicator and morphology with growth and maturity, Bulletin of Saga Prefecture Ariake Fisheries Experimental Station
Yoshimoto, M, (1990) Ecological study of jack knife clam, Sinonovacula constricta-VI. Growth and survival of natural clam, properties of mud in habitat, Bulletin of Saga Prefecture Ariake Fisheries Experimental Station
Yoshimoto, M, (1990) Ecological study of jack knife clam, Sinonovacula constricta-VII. Experiment of natural spat collection by the method of setting up bamboo, Bulletin of Saga Prefecture Ariake Fisheries Experimental Station
