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ISSN : 1225-3480

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Vol.30 No.4

Early Sexual Maturation Through Temperature Stimulation and Development of Patinopecten yessoensis

Kim, Young Dae
Lee, Chu
Min, Byung Hwa
Kim, MeeKyung
Kim, Gi Seung
Choi, Jae-Suk
An, Won Gun
Nam, Myung-Mo
The Korean Journal of Malacology / The Korean Journal of Malacology, (P)1225-3480;
2014, v.30 no.4, pp.311-319
https://doi.org/10.9710/kjm.2014.30.4.311
Kim,, Y. D. , Lee,, C. , Min,, B. H. , Kim,, M. , Kim,, G. S. , Choi,, J. , An,, W. G. , & Nam,, M. (2014). Early Sexual Maturation Through Temperature Stimulation and Development of Patinopecten yessoensis. , 30(4), 311-319, https://doi.org/10.9710/kjm.2014.30.4.311

Abstract

Early sexual maturation through temperature stimulation was induced in female and male of yezo scallop. Gonadosomatic index (GSI) in female showed $9.12{\pm}2.9$ in January, $14.89{\pm}2.9$ in February and $21.3{\pm}1.4$ in March in experiment I. GSI in experiment I showed a significant increase (P < 0.05) and in experiments II and III were not show significant variations (P > 0.05). It also showed significant between the control and the experiments I, II, and III in February (P < 0.05) measurements. Experiment I has showed good results in sexual maturation and spawning when compared with other experiments II and III and the control. Histological observation showed that ovary condition was in a growing stage in all the experiments I, II, and III. In February, ovary condition through histological observation was a late mature stage in all the experiments I, II, and III except the control of a growing stage. GSI and gonad weight were $4.4{\pm}0.88$ and 2.8 g, respectively in November whereas it was $15.1{\pm}2.8$, and 11.7 g, respectively in January and $21.7{\pm}5.4$, and 19.4 g, respectively in February after rearing at a water bath of $12^{\circ}C$ depending on the condition of experiment I. It was possible early releasing of eggs and sperms of yezo scallop in February instead of the middle of April to the end of May being spawning period. Fertilized eggs have become a gastrula stage through a spiral cleavage and then become a trochophore larvae after 36 hours. After 10 days, D-shaped larvae have changed into an umbo stage larvae and attached to juveniles in the post larvae after 20-23 days.

keywords
Scallop, Patinopecten yessoensis, Early sexual maturation, Water temperature stimulation, Development

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