Title: Induced Ovulation in Catfish (Silurus asotus) by GnRH-Analogue
Abstract: 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 () received a single intraperitoneal injection of GnRH-a ( weight) showed the successful induction of ovulation. More than of treated females were ovulated after injection of GnRH-a () at . 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 GnRH-a were and , respectively. Average fertilization and hatching rates were , respectively. Electron microscopically, gonadotrophs of maturing female catfish were characterized by the presence of numerous small, electron-dense granules of approximately nm in diameter and a few larger, less electron-dense granules of approximately 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.
Publication Year: 1996
Publication Date: 1996-01-01
Language: en
Type: article
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Cited By Count: 3
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