This study was carried out at poultry farm of the Faculty of Agriculture, Sana'a University, for 42 days, to investigate effect of partial replacement of commercial protein concentrate by sesame seeds cake (SSC) or local fish meal (LFM) on performance of broiler chickens in Yemen. A total of 294 unsexed day-old Hubbard broiler chicks weighing averagely 44.00 + 1.5gm were used. Chicks were assigned to seven treatment groups using randomized complete block design, with three replicates each with 14 chicks. SSC and LFM ( locally produced protein sources) were used to replace commercial protein concentrate ( "10%" control diet) in the starter ( 1 – 21 days) and finisher diets ( 22 – 42 days) of broilers by 3, 5 and 7% or 2, 4 and 6% levels of SSC and LFM, respectively. Results showed no significant differences (P>0.05) on final body weight, feed consumption, feed conversion ratio and live weight gain at 42 days between the control diet and 3 or 5% replacement levels of SSC or 2% of LFM. There were significant differences at increased levels of replacement from SSC or LFM, and decreased feed cost at 42 days, suggesting thus, that commercial protein concentrate could be replaced by SSC or LFM and cost effective.

Key Words :Broiler Chickens, Fish Meal, Performance, Protein Concentrate, Sesame Seed Cake