Yu Hairui, Zhang Xinyue, Yuan Ziyi, Yu Leyong, Zhao Youzhi, Li Lingyao
Key Laboratory of Biochemistry and Molecular Biology in Universities of Shandong (Weifang University), Weifang Key Laboratory of Coho Salmon Culturing Facility Engineering, Institute of Modern Facility Fisheries, College of Biology and Oceanography, Weifang University, Weifang 261061, China.
Weifang Centre for the Promotion of Scientific and Technological Innovation, Weifang 261000, China.
Aquac Nutr. 2024 Oct 8;2024:3862563. doi: 10.1155/2024/3862563. eCollection 2024.
A 10-week feeding trial was conducted to investigate the dietary pyridoxine requirements of coho salmon () post-smolts with an initial mean body weight of 180.22 ± 0.41 g. Seven diets were prepared with gradient pyridoxine levels of 0.32, 1.25, 2.56, 4.08, 8.24, 16.02, and 32.32 mg/kg, respectively, and each diet was assigned to three replication groups of 10 fish. The results revealed that coho salmon fed the diet with pyridoxine supplementation gained more final body weight (FBW), specific growth rate (SGR), and better feed conversion ratio (FCR). FBW and SGR of the fish fed the diet with 8.24 mg/kg pyridoxine were significantly higher than those of the other groups ( < 0.05). An inverse trend was observed for FCR, which was the lowest in fish fed the diet with 8.24 mg/kg pyridoxine. The gradient pyridoxine levels did not yield any statistically ( > 0.05) significant impact on the whole-body composition including moisture, ash, crude lipid, and crude protein. The hepatic pyridoxine concentration, aspartate aminotransferase (AST), and alanine aminotransferase (ALT) activities increased significantly with dietary pyridoxine levels increasing from 0.32 to 4.08 mg/kg ( < 0.05) and plateaued after that ( > 0.05). The coho salmon fed the diet with 8.24 mg/kg pyridoxine achieved the maximum superoxide dismutase and catalase, as well as the minimum total cholesterol, triglyceride, and malondialdehyde. Broken line analysis of SGR, FCR, AST, and ALT activities reflected the optimal dietary pyridoxine requirements for coho salmon post-smolts from 3.92 to 7.08 mg/kg diet.
进行了一项为期10周的饲养试验，以研究初始平均体重为180.22±0.41克的银大麻哈鱼（）降海幼鱼对日粮中吡哆醇的需求。分别用梯度为0.32、1.25、2.56、4.08、8.24、16.02和32.32毫克/千克的吡哆醇水平制备了七种日粮，每种日粮分配给三个重复组，每组10尾鱼。结果表明，补充吡哆醇的日粮喂养的银大麻哈鱼最终体重（FBW）、特定生长率（SGR）更高，饲料转化率（FCR）更好。饲喂含8.24毫克/千克吡哆醇日粮的鱼的FBW和SGR显著高于其他组（<0.05）。FCR呈现相反趋势，在饲喂含8.24毫克/千克吡哆醇日粮的鱼中最低。梯度吡哆醇水平对包括水分、灰分、粗脂肪和粗蛋白在内的鱼体组成没有产生任何统计学上的显著影响（>0.05）。随着日粮中吡哆醇水平从0.32毫克/千克增加到4.08毫克/千克，肝脏中吡哆醇浓度、天冬氨酸转氨酶（AST）和丙氨酸转氨酶（ALT）活性显著增加（<0.05），之后趋于平稳（>0.05）。饲喂含8.24毫克/千克吡哆醇日粮的银大麻哈鱼超氧化物歧化酶和过氧化氢酶达到最大值，总胆固醇、甘油三酯和丙二醛达到最小值。对SGR、FCR、AST和ALT活性进行折线分析，得出银大麻哈鱼降海幼鱼日粮中吡哆醇的最佳需求量为3.92至7.08毫克/千克日粮。
