Abdel-Tawwab, M. 2005. Predation Efficiency of Nile Catfish, Clarias gariepinus (Burchell, 1822) on Fry Nile Tilapia, Oreochromis niloticus (Linnaeus, 1758): Effect of Prey Density, Predator Size, Feed Supplementation and Submerged Vegetation. Turkish Journal of Fisheries and Aquatic Sciences, 5: 69-74. doi: