Feed Intensity of Characidae Fish in the Jebel Aulia Reservoir in Sudan

This study was conducted from November 2007 to October 2008 into the two main fishing sites in Jebel Aulia Reservoir; this was Jebel Aulia site (45kms) south Khartoum city) and Kosti site about 355 km southward Khartoum city. The study focuses in family Characidae that has two geniuses Hydrocynus (H. forskalii, H. lineatus and H. brevis) and Alestes (A. baremose, A.dentix and A. nurse). Water characteristics investigated including temperature, concentration of dissolved oxygen, electrical conductivity, transparency, pH, compositions and abundance of Phytoplankton. However, there is an un-normal decline of phytoplankton and zooplankton production at the vicinity of the dam indicating a prospected hazard. The study covered the biological parameter of characid fishs feeding and maturity. In two sites Jebel Aulia and Kosti Sites fishs showed maximal of incidence of full stomachs at the end of the rainy season exactly in August 2008 and the other peak was recorded during the high abundance of planktonic organism in March 2008.