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Effects of Tannic Acid Supplementation of a High-Carbohydrate Diet on the Growth, Serum Biochemical Parameters, Antioxidant Capacity, Digestive Enzyme Activity, and Liver and Intestinal Health of Largemouth Bass, Micropterus salmoides

文献类型： 外文期刊

作者： Wang, Yi 1 ; Wu, Jianjun 3 ; Li, Luoxin 2 ; Yao, Yuanfeng 4 ; Chen, Chiqing 4 ; Hong, Yucong 5 ; Chai, Yi 1 ; Liu, Wei 2 ;

作者机构： 1.Yangtze Univ, Coll Agr, Coll Anim Sci, Jingzhou 434020, Peoples R China

2.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan 430223, Hubei, Peoples R China

3.Wuhan SunHY Biol, Wuhan 430074, Hubei, Peoples R China

4.Wufeng Chicheng Biotech Co Ltd, Yichang 443413, Peoples R China

5.Guangdong Yuequn Biotechnol Co Ltd, Guangdong Prov Key Lab Aquat Larvae Feed, Jieyang, Guangdong, Peoples R China

期刊名称：AQUACULTURE NUTRITION （ 影响因子：3.5； 五年影响因子：3.6 ）

ISSN： 1353-5773

年卷期： 2024 年 2024 卷

页码：

收录情况： SCI

摘要： We investigated the effects of dietary tannic acid (TA) supplementation of a high-carbohydrate diet on growth, feed utilization, whole-body proximate composition, serum biochemical indicators, antioxidant capacity, digestive enzyme activity, and liver and intestinal health of juvenile largemouth bass, Micropterus salmoides (initial mean weight: 8.08 +/- 0.08 g). Five diets were prepared, including a positive control (dietary carbohydrate level, 16%, LC0), a negative control (dietary carbohydrate level, 21%, HC0), and three TA-supplementation diets based on the negative control diet with TA addition at 200, 400, and 800 mg/kg, respectively. After 8 weeks of feeding, the results showed that compared with the LC0 diet, 400-800 mg/kg dietary TA significantly improved the survival rate of largemouth bass (P<0.05) while significantly reducing its weight-gain rate and specific growth rate (P<0.05). Compared with the HC0 diet, 400 mg/kg dietary TA significantly increased serum catalase activity (P<0.05), and significantly decreased serum malondialdehyde, liver glycogen, lightness (L *), and yellowness (b *) (P<0.05). Moreover, compared with the HC0 diet, 200-400 mg/kg dietary TA effectively improved the vacuolation of hepatocytes caused by the high-carbohydrate diet and reduced the occurrence of intestinal epithelial cell vacuolation and necrosis. In turn, 800 mg/kg dietary TA significantly inhibited protease activity in the pyloric caecum and intestine (P<0.05). In conclusion, dietary supplementation with TA inhibited protease activity, which resulted in decreased growth performance in largemouth bass. However, it was also found that 200-400 mg/kg TA enhanced the antioxidant capacity of largemouth bass in the case of the high-carbohydrate diet, reduced liver glycogen levels, and improved liver and intestinal health. Finally, it should be noted that, when the dietary TA level exceeded 800 mg/kg, TA appeared to play a pro-oxidation role in the liver, which may cause oxidative stress in the liver.

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