頁籤選單縮合
題 名 | Induction of Ovarian Maturation by Two Distinct Salmon Gonadotropins in Japanese Eel |
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作 者 | Sato,Narumi; Kawazoe,Ichiro; Aida,Katsumi; | 書刊名 | 水產研究 |
卷 期 | 9:1/2 民90.12 |
頁 次 | 頁93-95 |
分類號 | 388.491 |
關鍵詞 | Japanese eel; Salmon gonadtropin Ⅰ and Ⅱ; Ovarian maturation; Vitellogenesis; Ovulation; |
語 文 | 英文(English) |
英文摘要 | Salmon gonadotropin (sGTH) I and II were separated from the sGTH fraction and their effects on the induction of ovarian maturation in Japanese eel were investigated. Immature female silver eels received weekly intramuscular injections of sGTH I, sGTH II or sGTH fraction (2 mg/kg body weight). In the fish that completed vitellogenesis, final oocyte maturation and ovulation were induced by a simultaneous injection of sGTH fraction and 17��,20��-dihydroxy-4-pregnen-3-one. In the fish injected with sGTH I, it took longer time to induce the completion of vitellogenesis than in the fish injected with sGTH II or sGTH fraction. Fertilization rate of eggs from the fish injected with sGTH fraction were higher than those from the fish injected with sGTH I or II, and hatched larvae were obtained. In the fish that received 21- 23 times of weekly sGTH I injection followed by weekly sGTH II injections, oocytes showed rapid maturation and finally ovulated. Fertilization rate of ovulated eggs were high and hatched larvae were also obtained. From these results, the effects of sGTH I and II on the induction of ovarian maturation were different. And it was considered that both sGTH I and II were required for the induction of ovarian maturation and obtaining good quality of eggs. |
本系統中英文摘要資訊取自各篇刊載內容。