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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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Experiments were carried out to investigate the effect of GnRH-analogue (GnRH-a) on the induction of ovulation in catfish, S. asotus. Fully matured female catfish (250~600 g) received a single intraperitoneal injection of GnRH-a (50~200 ㎍/kgㆍbody weight) showed the successful induction of ovulation. More than 86% of treated females were ovulated after injection of GnRH-a (90 ㎍/kg) at 25±1℃. The majority of spawning took place within 22 to 25 hours after the injection. The gonadosomatic index (GSI) and pseudo-GSI in the group treated with 120 ㎍/kg GnRH-a were 23-30% and 18-21%, respectively. Average fertilization and hatching rates were 94% and 81%, respectively.
Electron microscopically, gonadotrophs of maturing female catfish were characterized by the presence of numerous small, electron-dense granules of approximately 150~300 nm in diameter and a few larger, less electron-dense granules of approximately 800~1000 nm in size in their cytoplasm. Gonadotrophs of GnRH-a treated catfish showed that their was a distinct decrease in number of small and large granules. The rough endoplasmic reticulum was composed of numerous cisternae conspicuosly dilated to various degrees.
Electron microscopically, gonadotrophs of maturing female catfish were characterized by the presence of numerous small, electron-dense granules of approximately 150~300 nm in diameter and a few larger, less electron-dense granules of approximately 800~1000 nm in size in their cytoplasm. Gonadotrophs of GnRH-a treated catfish showed that their was a distinct decrease in number of small and large granules. The rough endoplasmic reticulum was composed of numerous cisternae conspicuosly dilated to various degrees.
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UCI(KEPA) : I410-ECN-0101-2009-529-015333549