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Optimal DL-methionyl-DL-methionine supplementation in a plant-protein diet for the red swamp crayfish Procambarus clarkii

文献类型： 外文期刊

作者： Wu, Meili 1 ; He, Juyun 3 ; Masagounder, Karthik 4 ; Huang, Feng 2 ; Liang, Hongwei 1 ; Dong, Lixue 1 ; Wen, Hua 1 ; Jiang, Ming 1 ; Lu, Xing 1 ; Su, Shengyan 5 ; Tian, Juan 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Key Lab Freshwater Biodivers Conservat, Yangtze River Fisheries Res Inst, Minist Agr & Rural Affairs, Wuhan 430223, Peoples R China

2.Wuhan Polytech Univ, Key Lab Anim Nutr & Feed Sci Hubei Prov, Wuhan 430023, Peoples R China

3.Guangzhou Med Univ, Sch Pharmaceut Sci, Guangzhou 511436, Peoples R China

4.Evon Operat GmbH, D-63457 Hanau, Germany

5.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Integrated Rice Fish Farming Ecol, Minist Agr & Rural Affairs, Wuxi 214081, Peoples R China

关键词： Met-Met; Growth performance; Nutrient deposition; Digestion; Antioxidation

期刊名称：AQUACULTURE INTERNATIONAL （ 影响因子：2.9； 五年影响因子：2.6 ）

ISSN： 0967-6120

年卷期： 2023 年

页码：

收录情况： SCI

摘要： This study evaluated the optimal DL-methionyl-DL-methionine (AQUAVI (R) Met-Met) supplementation for the red swamp crayfish Procambarus clarkii (initial body weight: 6.45 +/- 0.12 g) fed plant-based diets. Seven diets were formulated, including a positive control with 50.0 g kg(-1) fishmeal (PC), a negative control with 77.6 g kg(-1) peanut meal replacing 50.0 g kg(-1) fishmeal (NC), and five experimental diets supplemented with 0.25, 0.50, 1.00, 2.00, and 4.00 g kg(-1) Met-Met. The analyzed Met-Met levels of the seven diets were 0.06 (PC), 0.10 (NC), 0.27 (M0.27), 0.46 (M0.46), 1.00 (M1.00), 1.99 (M1.99), and 4.10 g kg(-1) (M4.10), respectively. After a 6-week feeding, crayfish fed the NC diet had lower growth performance, protein deposition, digestive enzyme activities, and antioxidant capacity than those fed the PC diet (P < 0.05). With the increasing Met-Met level to 1.00 g kg(-1) in NC diet, the weight gain rate; specific growth rate; protein deposition rate; the activities of protease, lipase, and amylase in hepatopancreas and intestine; total antioxidant capacity; catalase and superoxide dismutase activities; and S-adenosyl homocysteine contents showed significant improvement (P < 0.05). This means the supplementation of 1.00 g kg(-1) Met-Met in the non-fishmeal diet could alleviate the negative effects caused by all-plant protein formulation. Based on the broken-line regression analysis of weight gain rate and protein deposition rate in red swamp crayfish, the optimal levels of Met-Met in an all-plant protein diet were 0.90 and 0.95 g kg(-1), and the levels of the total sulfur amino acid were 11.61 and 11.67 g kg(-1), respectively.

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