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Comparative study of the nutritional composition and toxic elements of farmed and wild Chanodichthys mongolicus

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Abstract

Information of the difference in quality between farmed and wild fish is central to better ensuring fish products produced in aquaculture meet regulatory and consumer requirements. Proximate composition, amino acid and fatty acid profiles, and toxic elements contents of farmed and wild Chanodichthys mongolicus were established and compared. Significantly higher crude protein content while lower moisture content in farmed fish compared to wild fish were observed (P<0.05). The percentages of total amino acids (TAA), total essential amino acids (TEAA), total non-essential amino acids (TNEAA) and total delicious amino acids (TDAA) in farmed fish were all significantly higher than those in the wild equivalent (P<0.05). Compared to the FAO/WHO recommended reference values, the ratios of TEAA/TAA (39.84%–40.33%) were comparable to 40% and TEAA / TNEAA (66.22%–67.60%) were above 60%. Fatty acid profiles in both farmed and wild C. mongolicus were dominated by monounsaturated fatty acid (MUFA), with farmed fish contained much more MUFA content compared to wild counterpart (P<0.05). Notably, wild fish exhibited significantly higher levels of total polyunsaturated fatty acid (PUFA) including eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) than farmed fish (P<0.05). The EPA (C20:5n3) and linoleic acid (C18:2n6) were the predominant PUFA in wild and farmed C. mongolicus, respectively. Moreover, farmed fish displayed an overall lower toxic element levels (As, Cd, Pb and Hg) in comparison with wild fish, and both were far lower than the established limit standard. In conclusion, our results suggest that the nutritional quality of farmed C. mongolicus was inferior to their wild counterpart with respect to fatty acids nutrition, and therefore further studies should focus on the improving C. mongolicus diet in order to enhance the overall nutritional composition.

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Acknowledgment

The authors sincerely thank Dr. DU Xue, Mr. SONG Dan and Ms. BAI Shuyan at Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences for help in sample collection.

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Authors and Affiliations

  1. Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, 150070, China

    Haifeng Jiang  (姜海峰), Longwu Geng  (耿龙武), Shizhan Tang  (汤施展), Guangxiang Tong  (佟广香) & Wei Xu  (徐伟)

  2. Fisheries Institute Science of Hunan Province, Changsha, 410153, China

    Xiaofei Cheng  (程小飞)

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  1. Haifeng Jiang  (姜海峰)
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  2. Xiaofei Cheng  (程小飞)
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  3. Longwu Geng  (耿龙武)
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  4. Shizhan Tang  (汤施展)
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  5. Guangxiang Tong  (佟广香)
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  6. Wei Xu  (徐伟)
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Corresponding author

Correspondence to Wei Xu  (徐伟).

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JIANG Haifeng and CHENG Xiaofei contributed equally to this work.

Supported by the Central-level Non-profit Scientific Research Institutes Special Funds (No. 2014A07XK04)

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Jiang, H., Cheng, X., Geng, L. et al. Comparative study of the nutritional composition and toxic elements of farmed and wild Chanodichthys mongolicus . Chin. J. Ocean. Limnol. 35, 737–744 (2017). https://doi.org/10.1007/s00343-017-6119-0

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  • DOI: https://doi.org/10.1007/s00343-017-6119-0

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