한국발생생물학회:학술대회논문집 (Proceedings of the Korean Society of Developmental Biology Conference)
- 한국발생생물학회 2005년도 제20차 학술대회 논문집
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- Pages.52-52
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- 2005
Ultrastructural Study of Germ Cells and Reproductive Cycle in Female Neptunea arthritica cumingii
- Han, Ji-Soo (Department of Marine Life Science, Kunsan National University) ;
- Chung, Ee-Yung (School of Marine Life Science, Kunsan National University) ;
- Park, Gab-Man (Department of parasitology, Kwandong University College of Medicine)
- 발행 : 2005.07.08
초록
Oogenesis, the gonadosomatic index (GSI), reproductive cycle and first sexual maturation of the female Neptunea (Barbitonia) arthritica cumingii have been investigated by light and electron microscope observations. In the early vitellogenic oocyte, the Golgi complex and mitochondria were involved in the formation of glycogen, lipid droplets and yolk granules. In late vitellogenic oocytes, the rough endoplasmic reticulum and multivesicular bodies were involved in the formation of proteid yolk granules in the cytoplasm. In particular, compared with the results of other gastropods, it is a different result that appearances of cortical granules at the cortical layer and microvilli on the vitelline envelope, which is associated with heterosynthetic vitellogenesis, were not observed in vitellogenic oocytes during oogenesis. A mature yolk granule was composed of three components: main body (central core), superficial layer, and the limiting menbrane, Monthly changes in the gonadosomatic index in females were studied in 2002 and 2003 were closely associated with ovarian developmental phases. Spawning occurred between May and August in 2002 and 2003 and the main spawning occurred between June and July when the seawater temperature rose to approximately 18
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