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Analysis and Evaluation of Nutritional Components of the Nidamental Gland in Female Sepia pharaonis

DAI Hongjie, SUN Yulin, FENG Zixin, WEN Jing, CHEN Daohai   

  1. 1. Round Beibu Gulf Institute for the Protection and Utilization of Marine Animals in Medicine, Lingnan Normal University,
    Zhanjiang 524048, China; 2. School of Life Science and Technology, Lingnan Normal University, Zhanjiang 524048, China;
    3. School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
  • Online:2016-07-25 Published:2016-07-26
  • Contact: CHEN Daohai

Abstract:

The general nutrients, amino acids, fatty acids, cholesterol and inorganic elements in the nidamental gland of
female Sepia pharaonis (S. pharaonis) were analyzed to evaluate its nutritional value and developmental prospects. The
results showed that the contents of moisture, crude protein, crude fat and ash in the nidamental gland of female S. pharaonis
on fresh weight basis were 73.27%, 18.40%, 0.16% and 1.70%, respectively. Eighteen amino acids were detected in the
nidamental gland of female S. pharaonis and the content of essential amino acids (EAA) was 5.54 g/100 g, which accounted
for 41.47% of the total amino acids. The composition of EAAs met the FAO/WHO pattern. According to nutritional
evaluation by amino acids score (AAS), the first limiting amino acid was Val, while the first limiting amino acid was Trp
based on chemical score (CS). The total unsaturated fatty acids (UFAs) in the nidamental gland of female S. pharaonis
accounted for 63.21% of the total amount of fatty acids, and eicosapentaenoic acid (EPA) and docosahexaenoic acid
(DHA) accounted for 12.55% and 33.19% of the total fatty acids, respectively. The content of cholesterol in the sample was
2.24 mg/g, which was evidently lower than that of egg yolk. Macroelements (K, Ca, Na, and Mg) and trace elements (Se, Cu, and
Mn) were abundant in the nidamental gland of female S. pharaonis, but the content of As was 35.90 mg/kg, which highly exceeded
the limit standard of 0.5 mg/kg. These results indicated that the nidamental gland of female S. pharaonis possesses high nutritional
value, but there is a necessity for appropriate consumption and processing methods to ensure food safety.

Key words: Sepia pharaonis, nidamental gland, nutritional composition, amino acids, fatty acids, cholesterol

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