Inhibition of aromatase activity suppresses high-temperature feminisation of genetic male Nile tilapia, Oreochromis niloticus

Citation

Kwon JY, McAndrew B & Penman D (2000) Inhibition of aromatase activity suppresses high-temperature feminisation of genetic male Nile tilapia, Oreochromis niloticus. In: Norberg B, Kjesbu O, Taranger G, Andersson E & Stefansson S (eds.) Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, 04.07.1999-09.07.1999. Bergen, Norway: University of Bergen, p. 268.

Abstract
High temperature (36 degree C) significantly increased the percentage of males in genetic female fry (XX) and females in genetic male groups (significant only in YY, not in XY group). Aromatase inhibitor showed a strong masculinising effect in XX groups and inhibited feminisation when treated together with high temperature in YY groups. These results imply that aromatisation is mechanistically associated with temperature-dependent sex differentiation in this species.