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Steroid sex hormone dynamics during estradiol-17 beta induced gonadal differentiation in Paralichthys olivaceus (Teleostei)
Sun Peng1,2; You Feng1; Liu Mengxia3; Wu Zhihao1; Wen Aiyun1; Li Jun1; Xu Yongli1; Zhang Peijun1
2010-03-01
Source PublicationCHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
Volume28Issue:2Pages:254-259
SubtypeArticle
AbstractSteroid sex hormones, such as estradiol-17 beta (E2) and testosterone (T), are important regulators of sex change in fish. In this study, we examined the effects of E2 treatment on the dynamics of E2 and T during gonadal differentiation in the olive flounder Paralichthys olivaceus using histology and radioimmunoassay (RIA). Flounder larvae were divided into five groups (G0-G4), and fed with 0 (control), 0.2, 2, 20 and 100 mg E2/kg feed from 35 to 110 day post hatching (dph). Fish growth in the G1 and G2 groups was not significantly different from that of the control group (P > 0.05), while fish in the G3 and G4 groups were less active and showed growth depression and high mortality. The gonads of fish in the G3 and G4 groups were smaller and surrounded by hyperplastic connective tissue. The frequency of females in the G0-G4 groups was 54.5%, 75.0%, 100%, 100% and 93.3%, respectively. The RIA analyses of E2 and T showed that T levels decreased during gonadal differentiation, and increased slightly at the onset of ovarian differentiation, while E2 levels increased gradually and peaked at the onset of ovarian differentiation in the control group. In the E2-treated groups, T levels decreased before the onset of ovarian differentiation. E2 levels were high on the 48 dph, but declined to a lower level on the 54 dph, and then increased gradually during gonadal differentiation. And a sharp increase of E2 levels were observed in all E2-treated groups at the onset of ovarian differentiation. The data suggest that T and E2 play important roles during gonadal differentiation, and an E2 dose of 2 mg/kg feed could induce sex reversal in P. olivaceus.
KeywordOlive Flounder Gonadal Differentiation Estradiol-17 Beta (E2) Testosterone (t) Exogenous E2 Treatment
DOI10.1007/s00343-010-9011-8
Indexed BySCI
Language英语
WOS IDWOS:000275781400008
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/32872
Collection实验海洋生物学重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Shandong Prov Mari Culture Inst, Qingdao 266002, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Sun Peng,You Feng,Liu Mengxia,et al. Steroid sex hormone dynamics during estradiol-17 beta induced gonadal differentiation in Paralichthys olivaceus (Teleostei)[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2010,28(2):254-259.
APA Sun Peng.,You Feng.,Liu Mengxia.,Wu Zhihao.,Wen Aiyun.,...&Zhang Peijun.(2010).Steroid sex hormone dynamics during estradiol-17 beta induced gonadal differentiation in Paralichthys olivaceus (Teleostei).CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,28(2),254-259.
MLA Sun Peng,et al."Steroid sex hormone dynamics during estradiol-17 beta induced gonadal differentiation in Paralichthys olivaceus (Teleostei)".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 28.2(2010):254-259.
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