Effects of dietary supplementation of estradiol-17β during fry stage on growth, physiological and immune parameters and gonadal gene expression in adult snakeskin gourami.

In snakeskin gourami (Trichopodus pectoralis), females are generally larger than males, and estradiol-17β (E2)-sex reversal to produce female monosex has gained interest in this species. In this study, we aimed to investigate the effects of E2-induced sex reversal on growth, physiological and immune parameters, and gonadal gene expression in adult snakeskin gourami. Fry (7 days posthatching) were divided into different experimental groups based on the dose of E2: control (no E2 (0 mg kg) supplementation), E2-100 (100 mg kg), E2-200 (200 mg kg), and E2-300 (300 mg kg), fed with the E2 doses for 90 d and cultured for 11 months (adult stage).

Characterization of and Homologs in Snakeskin Gourami () and Their Expression Levels during Larval Development and in Gonads of Males and Females.

The purpose of this study was to clone and characterize and homologs in snakeskin gourami () and to determine their expression levels during larval development and in the gonads of males and females. Both cDNAs contained predicted regions that shared consensus motifs with the family in teleosts and the family in vertebrates. Phylogenetic tree construction analysis confirmed that these two genes were clustered in the families of teleosts.