Study on Shape Indexes and Texture Properties of Bighead Carp （Aristichthys nobilis）

Abstract:

The shape indexes of bighead carp （Aristichthys nobilis） were investigated using bighead carp of different weights. The texture properties from bighead carp of different weights and different parts were studied including TPA and shear stress. This study provided a theoretical foundation for the raw material selection in the following research. The results showed increases of the body length，body height，thickness of back，and the width of head with the increase of the body weight accordingly. The percentages of each part in the whole fish were quite similar. The fish muscle presented the highest percentage of 45%，followed by the head of 35%，while the internal organs，skin，fins and scales were in lower proportions，about 6.5%，4%，2.2% and 1.5%，respectively. Overall，the hardness，chewiness，gelation，elasticity，cohesiveness，resilience，and shear stress of the fish increased with the increase of fish body. Fluctuations were observed for TPA and shear stress of various parts from fish of 1.5 kg. Slight changes were observed for those from fish of 2.0 kg and 2.5 kg，where the values of TPA from part 1 and part 5 were smaller than those in the middle，and few differences were observed for part 2，part 3 and part 4.