English  |  正體中文  |  简体中文  |  Items with full text/Total items : 27320/39164
Visitors : 2475054      Online Users : 42
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search
LoginUploadHelpAboutAdminister

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/37549

Title: Estradiol-17β Induced a Reversible Sex Change in the Fingerlings of Protandrous Black Porgy, Acanthopagrus schlegeli Bleeker: The Possible Roles of Luteinizing Hormone in Sex Change
Authors: Yan-Horn Lee;Guan-Chung Wu;Jin-Lien Du;Ching-Fong Chang
Contributors: 國立台灣海洋大學:水產養殖系
Date: 2004-10
Issue Date: 2016-03-21T02:30:19Z
Publisher: Biology of Reproduction
Abstract: Abstract:The objectives of the present study were to investigate the effects of oral administration of estradiol-17β (E2) on luteinizing hormone (LH) in plasma, aromatase activity in gonad, and sex change in the fingerlings of protandrous black porgy, Acanthopagus schlegeli Bleeker. The expression of estrogen receptor (ER) and androgen receptor (AR) transcripts in gonad was also analyzed. Undifferentiated (2-mo-old) black porgy were divided into two groups, one fed a control diet and the other a diet mixed with E2 (6.0 mg/kg feed) for 5 mo. Fish treated with E2 for 3 mo showed complete suppression of spermatogenesis and spermiation and induced sex change with primary oocytes. Aromatase activity in forebrain and midbrain was increased in the control in December–March (during the spawning season). E2 stimulated aromatase activity in the brain. Higher gonadal aromatase activity in concordance with elevated levels of plasma LH was observed in the E2 group compared with the control. After 2-mo of E2 termination, regressed testicular tissue recovered and controlled females gradually reversed back to functional males in January and March. Plasma LH levels were higher in the E2-terminated group during the period of reversible sex change (from a controlled female to male) compared with the control. The expression of ER and AR transcripts was closely related to the development of testis and ovary. The data showed that E2 induced a reversible sex change with high plasma LH. Increase of gonadal aromatase and decrease of ER/AR were associated with controlled sex change. Plasma LH levels were correlated with the conversion from a controlled female to male in black porgy.
Relation: 71(4),pp.1270-1278
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/37549
Appears in Collections:[水產養殖學系] 期刊論文

Files in This Item:

File Description SizeFormat
index.html0KbHTML93View/Open


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