11–Ketotesterone (Kt–11), Estradiol (E2) Level and Cytochrome P450 (Bgcyp19a) Transcription in the Testis of Male Blue Gourami (Trichogaster Trichopterus)

Gad Degani

Volume : IV, Issue : IX, September - 2015

11–Ketotesterone (Kt–11), Estradiol (E2) Level and Cytochrome P450 (Bgcyp19a) Transcription in the Testis of Male Blue Gourami (Trichogaster Trichopterus)

Gad Degani

Abstract :

The present study examine 11–ketotesterone (KT–11), estradiol (E2) level and cytochrome P450 (bgCYP19a) in the testis of blue gourami during maturation, sexual behavior and spermatogenesis. A significantly higher level of 11–KT was found in mature fish compared to juveniles. Testis estradiol (E2) level was lower in juveniles compared to adults, but the difference was not statistically significant. The mRNA level of bgCYP19a in the testes of juvenile males did not differ significantly (t–test, p > 0.05) from its level in the transcription of mature non–nest– building (non–reproductive) males. However, the bgCYP19a in the testes of reproductive males (nest–builders) increased significantly (t–test; p < 0.05) in reproductive males.