Compositions of Fatty Acids and Minerals in Muscle of Blackspot Sisord Catfish Glyptosternum maculaturm
ZHOU Jianshe1,2, WANG Qielu1, WANG Wanliang1, ZENG Benhe1, WANG Jinlin1, MU Zhenbo1
1.Institute of Fisheries Science, Xizang Autonomous Region Academy of Agricultural and Animal Husbandry Sciences, Lhasa 850032, China; 2.College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, China
Abstract：Compositions of fatty acids and minerals in muscles were analyzed in 10 samples of blackspot sisord catfish Glyptosternum maculaturm with body weight of (158.92±24.10) g collected from the territory of Ngamring County, Xigazê City (N 29°27'58.72″, E 86°54'36.06″), Xizang Autonomous Region in order to explore the nutritional composition of the muscle and to develop and protect the germplasm resources of blackspot sisord catfish. The results showed that there were 16 fatty acids in muscle including 8 saturated fatty acids (SFA), 2 monounsaturated fatty acids (MUFA), and 6 polyunsaturated fatty acids (PUFA), with total content of 1015.7 mg/kg in SFA, 494.4 mg/kg in MUFA and 1148.3 mg/kg in PUFA, and the total content of 108.37 mg/kg in essential fatty acid and 960.08 mg/kg in eicosapentaenoate (EPA)+ docosahexaenoate (DHA). There were atherogenic index (IA) of 0.41, thrombosis index (IT) of 1.18, and 19 mineral elements in muscle of blackspot sisord catfish, with the maximal content of K (4061.23 mg/kg) and the minimal content (0.01 mg/kg) of vanadium (V) in muscle, with the value of Ca∶P=1∶164, and the value of Na∶K=0.33∶1. The risk evaluation of some minerals in muscle of blackspot sisord catfish revealed that the maximal risk index was Zn with the risk index from 16.13% to 39.53% and the minimal one Se with the risk index from 0.02% to 0.03%, indicating that all of the risk indices evaluated were within the safe rang. The findings indicated that there were abundant PUFA and abundant minerals in muscle of blackspot sisord catfish, which has higher edible and health value.
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2020, Vol. 39 
