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Steroid hormone levels and bi-directional sex change in Gobiodon histrio

Citation

Kroon, FJ and Munday, PL and Pankhurst, NW, Steroid hormone levels and bi-directional sex change in Gobiodon histrio, Journal of Fish Biology, 62, (1) pp. 153-167. ISSN 0022-1112 (2003) [Refereed Article]

DOI: doi:10.1046/j.1095-8649.2003.00017.x

Abstract

Sex change in the coral-dwelling goby Gobiodon histrio was induced by placing two adult fish of the same sex on a coral colony. The sex change of individual fish was confirmed using histology, and whole-body concentrations of the gonadal steroids testosterone (T), 11-ketotestosterone (11-KT), and 17β-oestradiol (E2) were examined. The results show that T, 11-KT and E2 occurred in both female and male G. histrio. E 2 concentration in females was twice that in males, while concentrations of T did not differ between the sexes. Contrary to predictions, concentrations of Tand E2 did not differ between fish that changed sex and those that did not. Most samples had 11-KT concentrations below minimum levels of detection (i.e. <0.15 ng ml-1) and were therefore not analysed statistically The results suggest that: (i) specific activation or de-activation of theT-E2 (aromatase) pathway is a probable candidate for mediating serial adult sex change in G. histrio, and (ii) low levels of 11-KT may be important in allowing serial adult sex change in G. histrio. © 2003 The Fisheries Society of the British Isles.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Fish Physiology and Genetics
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Fisheries - Aquaculture not elsewhere classified
Author:Pankhurst, NW (Professor Ned Pankhurst)
ID Code:26269
Year Published:2003
Web of Science® Times Cited:27
Deposited By:TAFI - Aquaculture
Deposited On:2003-08-01
Last Modified:2011-11-04
Downloads:0

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