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| Nutrient Composition of Different Parts of Antarctic Icefish |
| WANG Ping1,2, ZHANG Jian1, SUN Liqin2, JING Yuexin1, LI Zhenduo1, LIU Kui1,3, MA Ji1,3, WANG Gongming1 |
1. Shandong Marine Resource and Environment Research Institute, Yantai 264006, China;
2. College of Life Sciences, Yantai University, Yantai 264005, China;
3. Shanghai Ocean University, Shanghai 201306, China |
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Abstract The contents of approximate compositions, fatty acids, amino acids and mineral elements were analyzed in bones, flesh, head and skin of Antarctic icefish Channichthys mithridatis with body weight of (198±3.25) g by conventional methods and the quality of different parts of the icefish was evaluated. It was found that the Antarctic icefish had high protein content in flesh and skin, and was rich in fat and ash contents in bone and head. A total of 28 kinds of fatty acids, 11 kinds of saturated fatty acids and 17 kinds of unsaturated fatty acids were detected in different parts of Antarctic icefish, in which there were significant differences in percentage of saturated fatty acid content in total fatty acid content in various parts (P<0.05), accounting for 25.15% in bone, 24.87% in flesh, 30.96% in head and 31.91% in skin. There were significant difference in percentage of unsaturated fatty acid content in total fatty acid content in various parts (P<0.05), accounting for 49.50% in bone, 52.27% in flesh, 37.64% in head, and 76.64% in skin, with 31.68% of EPA and DHA in total fatty acids of Antarctic icefish flesh. Seventeen kinds of amino acids were detected in flesh and head, and 16 kinds of amino acids in bone and skin, without cystine. There were significant differences in percentage of total amino acids (P<0.05), accounting for 35.18% in bone, for 77.77% in flesh, 44.24% in head, and for 69.16% in skin in dry weight. The total amount of Asp, Glu, Gly and Ala in fish flesh and skin was higher than that in bone and head. Various mineral elements and contents were detected in different parts of Antarctic icefish (P<0.05), rich in Mg and K elements in flesh, rich in Mg, Ca and Mn elements in bone and head, especially Ca element in bone, and rich in Mg, Cu, Zn and Fe elements in skin. The finding provides a data basis for the comprehensive utilization of Antarctic icefish in the future.
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Received: 19 June 2019
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