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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/26776

Title: Sex differentiation and sex change in the protandrous black porgy, Acanthopagrus schlegeli
Authors: Guan-Chung Wu;Sherly Tomy;Mong-Fong Lee;Yan-Horn Lee;Wen-Shiun Yueh;Chien-Ju Lin;En-Lieng Lau;Ching-Fong Chang
Contributors: NTOU:Department of Aquaculture
國立臺灣海洋大學:水產養殖學系
Keywords: Gene expression;Gonadal histology;Sex differentiation;Sex change;Sex steroids;Fish
Date: 2010-07-01
Issue Date: 2011-10-21T02:18:37Z
Publisher: General and Comparative Endocrinology
Abstract: Abstract:Protandrous black porgy fish, Acanthopagrus schlegeli, have a striking life cycle with a male sex differentiation at the juvenile stage and male-to-female sex change at 3 years of age. We had characterized the sex differentiation and sex change in this species by the integrative approaches of histology, endocrine and molecular genetics. The fish differentiated in gonad at the age around 4-months and the gonad further developed with a bisexual gonad for almost for 3 years and sex change at 3 year of age. An antagonistic relationship in the testicular and ovarian tissues was found during the development of the gonadal tissue. Male- (such as sf-1, dmrt1, dax-1 and amh) and female- (such as wnt4, foxl2 and cyp19a1a) promoting genes were associated with testicular and ovarian development, respectively. During gonadal sex differentiation, steroidogenic pathway and estrogen signaling were also highly expressed in the brain. The increased expression of sf-1 and wnt4, cyp19a1a in ovarian tissue and decreased expression of dax-1 in the ovarian tissue may play important roles in sex change from a male-to-female. Endocrine factors such as estradiol and luteinizing hormone may also involve in the natural sex change. Estradiol induced the expression of female-promoting genes and resulted in the precocious sex change in black porgy. Our series of studies shed light on the sex differentiation and sex change in protandrous black porgy and other animals.
Relation: 167(3), pp.417-421
URI: http://ntour.ntou.edu.tw/handle/987654321/26776
Appears in Collections:[水產養殖學系] 期刊論文

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