The nile
tilapia is by far the most commonly used species in fish farming. However
farming of this species in ponds results commonly in early maturation as low as
70 g fish body weight only. Hormones can be used to control reproduction to
produces good-size fish, although they can pose some risks to human health.
Saponin can be a good alternative to control reproduction according to Christian
Lückstädt, Paz Kühlmann and Yasmin Primavera-tirol.
This article can also be found at Feed Mix, volume 14, no. 5
15_FM14_05_saponis.pdf