National Taiwan Ocean University Institutional Repository:Item 987654321/38302
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 28611/40652
Visitors : 772654      Online Users : 48
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search

Please use this identifier to cite or link to this item:

Title: 17alpha-Methyltestosterone induced sex change in the unilateral ovariectomized protogynous orange-spotted grouper
Authors: Yeh, Shinn-Lih;Chu, Yeong-Torng;Kuo, Ching-Ming;Ting, Yun-Yuan;Chang, Ching-Fong
Contributors: 國立臺灣海洋大學:水產養殖學系
Date: 2003
Issue Date: 2016-08-24T06:57:00Z
Publisher: Journal of the Fisheries Society of Taiwan
Abstract: Abstract: The objectives were to investigate the effects of sex change in the unilateral ovariectomized (remained one-side gonad) orange-spotted grouper, Epinephelus coioides by implantation with 17alpha-methyltestosterone (MT, 10 mg/kg body weight). Two-year-old female groupers (n=42) were equally divided into 6 groups: intact+control implant, intact+MT implant, unilateral ovariectomized+control implant, unilateral ovariectomized+MT implant, all-ovariectomized+control implant, and all-ovariectomized+MT implant. One side of gonad and both sides of gonad were surgically removed in the unilateral and all-ovariectomized groupers, respectively. After 60-day implantation, all the MT-implanted fish (100% in either intact gonad or unilateral ovariectomized groups) changed from females to males. During the process of MT-implantation, intact fish changed to males after 15 days (33%), 30 days (67%) as compared to 0% on day 15 and 14% on day 30 in the unilateral ovariectomized fish. Significantly higher gonadosomatic index was detected (P<0.05) in the unilateral ovariectomized+control implant as compared to other groups. MT implant decreased hepatosomatic index as compared to the respective control implanted group. Plasma testosterone (T) concentrations and the ratio of plasma T/estradiol-17beta were correlated to the sex change. No regeneration of gonadal tissue was observed in the ovariectomized fish. It is concluded that MT induced sex change in groupers, E. coicoides with either intact or remained single-side gonad.
Relation: 30(1)
Appears in Collections:[Department of Aquaculture] Periodical Articles

Files in This Item:

File Description SizeFormat

All items in NTOUR are protected by copyright, with all rights reserved.


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback