College of Fisheries, National Demonstration Center for Experimental Aquaculture Education, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Huazhong Agricultural University, Wuhan 430070, PR China.
College of Fisheries, National Demonstration Center for Experimental Aquaculture Education, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Huazhong Agricultural University, Wuhan 430070, PR China; Department of Animal Production, Faculty of Agriculture, Mansoura University, Al-Mansoura 35516, Egypt.
Food Chem. 2018 Aug 1;256:244-251. doi: 10.1016/j.foodchem.2018.02.066. Epub 2018 Feb 13.
This study aimed to evaluate the effects of thermally processed diet (TD) on the muscle nutritional values of southern catfish in two experiments (named E1 and E2). Compared to non-thermally processed diet (ND), TD did not significantly affect proximate composition of southern catfish, but increased moisture content and decreased protein content in E1. Meanwhile, it had no effect on overall fatty acid profiles of the catfish rich in PUFA. Southern catfish had high proportions of indispensable amino acids (IAA, 44.6-46.4% of total fatty acids), with the highest contents of lysine (1551-1808 mg/100 g wet weight muscle). However, TD altered profiles of the IAA, particularly decreased 68.5% and 68.4% of methionine, and 9.5% and 10.7% of lysine in E1 and E2, respectively. Conversely, it increased 45.4% and 83.4% of dispensable fatty acid proline. These results suggest TD could affect the nutritional quality of protein rather than fat in farmed fish.
本研究旨在通过两项实验（分别命名为 E1 和 E2）评估热处理日粮（TD）对南方鲶鱼肌肉营养价值的影响。与未经热处理的日粮（ND）相比，TD 并未显著影响南方鲶鱼的近似成分，但在 E1 中增加了水分含量，降低了蛋白质含量。同时，它对富含多不饱和脂肪酸（PUFA）的鱼的总脂肪酸谱没有影响。南方鲶鱼富含必需氨基酸（IAA，占总脂肪酸的 44.6-46.4%），其中赖氨酸含量最高（1551-1808mg/100g 湿重肌肉）。然而，TD 改变了 IAA 的分布，特别是在 E1 和 E2 中，蛋氨酸分别降低了 68.5%和 68.4%，赖氨酸分别降低了 9.5%和 10.7%。相反，它增加了 45.4%和 83.4%的非必需脂肪酸脯氨酸。这些结果表明，TD 可能会影响养殖鱼类蛋白质的营养价值，而不是脂肪。
