Nutritional Analysis and Evaluation on Skin and Scales of Spinibarbus caldwelli
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Abstract:
The nutritional components of skin and scales of Spinibarbus caldwelli cultured in Zhijiang river reservoir cage in Hunan province were determined. The results showed that the contents of crude protein, crude fat, moisture, and crude ash in fresh skin of Spinibarbus caldwelli were 23.80%, 13.24%, 49.21% and 0.38%, respectively, while those in fresh scales were 40.77%, 2.70%, 53.53% and 9.05%, respectively. Both skin and scales contained 16 kinds of amino acids, in which the total amino acids （TAA） accounted for 11.91% and 50.64%, respectively. Although, the ratios of EAA/TAA and EAA/NEAA in skin were only 20.91% and 26.43%, respectively, as well as those in scales were only 16.71% and 20.06%, respectively, but the ratios of delicious amino acids （DAA）/TAA in skin and scales were up to 46.23% and 48.42%, respectively. Both skin and scales contained 11 kinds of fatty acids, in which the saturated fatty acids accounted for 23.20% and 25.01%, respectively, the monounsaturated fatty acids accounted for 53.59% and 53.95%, respectively, and the polyunsaturated fatty acids accounted for 23.21% and 21.04%, respectively. Cu, Zn, Fe, Mn and Se were detected in the skin and scales of Spinibarbus caldwelli. In skin, the content of Zn was the highest, and Se was the lowest, which were 64.62 and 0.03 mg/kg, respectively. In scales, Zn was the most abundant and Se the least abundant trace element, and their contents were 32.96 and 0.27 mg/kg, respectively. In conclusion, both skin and scales were rich in minerals and unsaturated fatty acids, with huge potential for development and utilization.
