The experiment was conducted using 48 fish, common carp Cyprinus carpio L.(average weight 41.51±3.51 g). Fish were distributed on 6 aquaria each one represents a starvation period and contained 8 individuals. After two wee s of acclimatization on commercial diet to reduce individual differences in nutritional status, fish were exposed to starvation periods (2, 4, 6, 8, and 10 wee s). Fish weighed every two wee s with the sample of 5 fish for measurements of some blood parameters (Haematocrit PCV, haemoglobin Hb, total number of erythrocytes and leu ocytes count, total protein, plasma glucose level) and the rate of oxygen and energy consumption. Body weight rates decreased gradually as a direct result of the starvation process. All the studied parameters except for plasma glucose level decreased significantly (P≤ 0.01) after six wee s of starvation, and the decrease continued to the end of experiment which lasted for ten wee s.