Volume 31 Issue 4
Jul.  2010
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JIAO Zong-Yao, LIU Yong, ZHANG Chun-Fang. Observation on the Embryo Development of Lutraria sieboldii Reeve(A Unique New Type of Cleavage — Fusion Cleavage). Zoological Research, 2010, 31(4): 408-414. doi: 10.3724/SP.J.1141.2010.04408
Citation: JIAO Zong-Yao, LIU Yong, ZHANG Chun-Fang. Observation on the Embryo Development of Lutraria sieboldii Reeve(A Unique New Type of Cleavage — Fusion Cleavage). Zoological Research, 2010, 31(4): 408-414. doi: 10.3724/SP.J.1141.2010.04408

Observation on the Embryo Development of Lutraria sieboldii Reeve(A Unique New Type of Cleavage — Fusion Cleavage)

doi: 10.3724/SP.J.1141.2010.04408
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  • Author Bio:

    JIAO Zong-Yao

  • Corresponding author: LIU Yong
  • Received Date: 2009-12-31
  • Rev Recd Date: 2010-06-15
  • Publish Date: 2010-08-22
  • The embryonic development process of Lutraria sieboldii Reeve was observed. The results showed that:(1) Like other bivalves, its embryonic development could be divided into 5 phases: cleavage, blastula, gastrula, trochophore and veliger. (2) In cleavage phase, the cleavage mode for Lutraria sieboldii Reeve was completely different from other animals. Although the ova of L. sieboldii Reeve obtained the ability to fertilize before they developed into the prophase of meiosis I (prior to the breakage of blastocyst), the release of polar bodies was not observed posterior to fertilization of ova, instead multi-nuclear fertilized ova were found. In later cleavage, longitudinal or latitudinal cleavages with the fertilized eggs did not occur as in other animals. A more unique and intricate type of cleavage, we called it fusion cleavage, was observed, viz., before 2-cell, 4-cell, 8-cell blastomeres entered into next division, nuclei disappeared gradually, blastomere fused gradually into one cell. After some time, in the centre of the cell appeared gradually nuclei that had been doubled in number. The nuclei gradually moved outward, and finally number-doubled blastomeres were cleaved out at one time.
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    Cai YY, Lao Z, Chen D. 2005. An ecological observation of Lutraria sieboldii[J]. J Zhanjiang Ocean Univ, 25(1): 39-42. [蔡英亚, 劳 赞, 陈 东. 2005. 施氏獭蛤的生态观察. 湛江海洋大学学报, 25(1): 39-42.]Gui JF, Yi MS. 2002. Developmental Biology [M]. Beijing: Science Press, 96-108. [桂建芳, 易梅生. 2002. 发育生物学. 北京: 科学出版社, 96-108.]Li X. 2006. Histology and Embryology of Aquatic Animals [M]. Beijing: China Agriculture Press, 203-350. [李 霞. 2006. 水产动物组织胚胎学. 北京: 中国农业出版社, 203-350.]Liu Y, Liang FL, Mao Y, Yu XY. 2006. Studies on artificial hatching technique for Lutraria sieboldii[J]. J Zhanjiang Ocean Univ,. 26(3): 98-101 [刘 永, 梁飞龙, 毛 勇, 余祥勇. 2006. 施氏獭蛤人工育苗技术的研究. 湛江海洋大学学报, 26(3): 98-101.]Liu Y, Yu XY, Liang FL, Mao Y. 2007. Development and behavior of the larvae and juveniles of Lutraria sieboldii Reeve[J]. J Guangdong Ocean Univ, 27(1): 17-21. [刘 永, 余祥勇, 梁飞龙, 毛 勇. 2007. 施氏獭蛤幼虫和稚贝发育及行为的研究. 广东海洋大学学报, 27(1): 17-21.]Twyman RM. 2002. Instant Notes in Developmental Biology[M]. Beijing: Science Press, 161-171. [Twyman RM. 2002. 发育生物学. 北京: 科学出版社, 161-171.]
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