The metabolism of androstenedione by liver microsomes from rainbow trout, Salmo gairdnerii, at different stages of sexual development was studied, 17-Hydroxysteroid oxidoreductase activity in male trout increased significantly during the spawning period, while no such increase was seen in female trout. On the other hand, 6β-hydroxylase activity was significantly lower in maturing female trout when compared to juvenile and mature trout of both sexes. 5α-Reductase and 16-hydroxylase activities exhibited no sex-dependent variations during the period of sexual development in trout. A possible role for the liver in regulation of steroid biosynthesis in fish is discussed.
ASJC Scopus subject areas
- Animal Science and Zoology