Figure 2From: Reproductive biology of female Nile tilapia Oreochromis niloticus (Linnaeus) reared in monoculture and polyculture with African sharptooth catfish Clarias gariepinus (Burchell)Percentage of each maturity stage for 5 cm length groups of female O. niloticus reared under monoculture (a) and polyculture (b).Back to article page