| This study was carried out at the Poultry Farm and Scientific Laboratories of Animal Production Department, College of Agriculture, University of Tikrit, investigate the effect of the cholesterol level in blood serum on some productive traits and hematological parameters of commercial (Hubbard) broiler chicks. 2500-day-old chicks were reared at a closed poultry house, using a conventional method. At 3 weeks of age, 300 birds were randomly assigned into three groups according to their level of cholesterol concentration after being tagged in the wing. The three selected groups were: the low cholesterol level group (less than 200 Mg / dl ); the medium cholesterol level group (200-240 Mg/dl) and the high cholesterol level group (more than 240 Mg /dl). The results obtained can be summarized as follows: The low cholesterol level group showed significantly a higher final body weight, feed intake, feed conversion efficiency, mortality and the production index. The final body weights were 2628, 2573 and 2417 gms for the low, medium and high cholesterol level, respectively. total feed intake: 3262, 3432, and 3450 gms, feed conversion efficiency: 2.03, 2.18 and 2.43. mortality: 1.78 , 3.57 and 5.36 % and the production index: 232.32 , 192.86 , 148.63 , for three groups, respectively. The broilers of the high cholesterol group surpassed significantly (p< 0.05) other groups regarding cholesterol concentration, breast and thigh meat. The values were 40.62, 44.01, 48.32 and 51.80, 59.06 and 64.60 (Mg Cholesterol / gm meat), for the three groups, respectively |