文献类型： 外文期刊

作者： Yan, Tao ¹ ; Xie, Yun-Yi ¹ ; Zhou, Bo ¹ ; Kuang, Xu ¹ ; Li, Qing-Zhi ¹ ; Zhao, Feng-Qi ¹ ; Li, Qian-Dong ¹ ; He, Bin ¹ ;

作者机构： 1.Sichuan Acad Agr Sci, Fisheries Res Inst, Chengdu 611730, Peoples R China

2.Fish Resources & Environm Upper Reaches Yangtze Ri, Chengdu 611731, Peoples R China

关键词： rice-fish farming; Carassius auratus; antioxidant defenses; metabolism; nutrient

期刊名称：METABOLITES （ 影响因子：3.7； 五年影响因子：4.1 ）

ISSN：

年卷期： 2024 年 14 卷 12 期

页码：

收录情况： SCI

摘要： Rice-fish farming is an ancient and enduring aquaculture model in China. This study aimed to assess the variations in digestive enzymes, antioxidant properties, glucose metabolism, and nutritional content between Carassius auratus reared in paddy fields and ponds. Notably, the levels of amylase and trypsin in C. auratus from rice paddies were considerably higher compared to those from ponds. Additionally, the hepatic catalase (CAT) activity in fish from paddy (2.45 +/- 0.16 U/mg) exceeded that of their pond counterparts (2.27 +/- 0.25 U/mg). Regarding glucose metabolism, the activities of key enzymes such as Na+/K+-ATPase (NKA) (paddy: 82.45 +/- 6.11 U/g; pond: 78.53 +/- 7.18 U/g), hexokinase (HK) (paddy: 9.55 +/- 0.58 U/g; pond: 8.83 +/- 0.72 U/g), glucokinase (GK) (paddy: 4.09 +/- 0.21 IU/g; pond: 3.44 +/- 0.33 IU/g), glucose-6-phosphatase (G6Pase) (paddy: 85.71 +/- 4.49 IU/g; pond: 79.12 +/- 9.34 IU/g), and glucose-6-phosphate dehydrogenase (G6PDH) (paddy: 47.23 +/- 3.22 U/g; pond: 42.31 +/- 4.93 U/g) were significantly elevated in rice paddy-cultured fish compared to those in ponds. Conversely, phosphor-pyruvate kinase (PK) (paddy: 418.15 +/- 31.89 U/g; pond: 570.16 +/- 56.06 U/g) activity was markedly reduced in the paddy group. Hepatic glycogen content (paddy: 15.70 +/- 0.98 ng/g; pond: 14.91 +/- 1.24 ng/g) was also substantially higher in fish from paddy, although no significant differences in muscle glycogen content (paddy: 7.14 +/- 0.59 ng/g; pond: 6.70 +/- 0.52 ng/g) were observed between the two environments. In terms of nutritional composition, fish raised in paddy exhibited higher crude protein (paddy: 18.46 +/- 0.47 g/100 g muscle; pond: 15.57 +/- 0.25 g/100 g muscle) and crude ash (paddy: 1.19 +/- 0.02 g/100 g muscle; pond: 0.97 +/- 0.02 g/100 g muscle) than those in ponds, whereas the crude fat (paddy: 0.87 +/- 0.04 g/100 g muscle; pond: 1.66 +/- 0.04 g/100 g muscle) was notably lower in paddy fish. Furthermore, fish from rice paddies had a greater total content of monounsaturated fatty acids (MUFA) (paddy: 4.25 +/- 0.24 g/100 g muscle; pond: 6.73 +/- 0.27 g/100 g muscle), non-essential amino acids (NEAA) (paddy: 9.04 +/- 0.3 g/100 g muscle; pond: 7.19 +/- 0.21 g/100 g muscle), and delicious amino acids (DAA) (paddy: 7.11 +/- 0.2 g/100 g muscle; pond: 5.45 +/- 0.19 g/100 g muscle) compared to those from pond cultures. These findings suggest that rice-fish co-culture systems can yield healthier and more environmentally sustainable aquatic products by improving feed digestion and optimizing nutrient metabolism.