A 70‐day feeding trial was conducted to investigate effects of dietary organic trace mineral (OTM) mixture levels on survival, growth performance, body composition and antioxidant capacity of juvenile turbot (Scophthalmus maximus). The commercial diet with 0.03% inorganic trace mineral (ITM) premix was used as the control, and other four experimental isonitrogenous (50% crude protein) and isolipidic (12% crude lipid) diets were formulated to contain 0.0375%, 0.075%, 0.1125% and 0.15% OTM mixture respectively. Results showed that there were no significant differences in survival among dietary treatments. However, the growth was not significantly different between the control and OTM supplementation diets. Especially, turbot fed the diet with 0.075% OTM had significantly higher specific growth rate than 0.15%, 0.1125% and 0.0375% OTM treatments (p < .05). Moisture, crude protein, crude lipid and ash of the whole fish body showed no significant differences among dietary treatments. Activities of superoxide dismutase in serum of turbot fed diets with 0.1125% and 0.15% OTM were significantly higher than 0.0375% OTM treatment (p < .05). Activities of total antioxidant capacity and catalase in serum were the highest, while the malondialdehyde content was the lowest when the turbot were fed the diet with 0.075% OTM. In summary, results of the present study suggested that the supplementation of 0.0375% or more OTM in diets could obtain similar performance to the commercial diet with ITM premix, and the optimal amount of OTM supplementation in diets of turbot was approximately 0.075% on basis of growth performance and antioxidant capacity.

中文翻译：

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膳食有机微量矿物质混合物水平对小菱turbo的存活，生长性能，身体成分和抗氧化能力的影响

进行了一项为期70天的喂养试验，以研究膳食有机微量矿物质（OTM）混合物水平对小菱turbo（Scophthalmus maximus）存活，生长性能，身体成分和抗氧化能力的影响）。含0.03％无机微量矿物质（ITM）预混物的商业日粮用作对照，配制了其他四种实验性的等氮（50％粗蛋白）和异脂（12％粗脂质）日粮，使其分别含有0.0375％，0.075％，0.1125分别为％和0.15％OTM混合物。结果表明，饮食治疗之间的生存率无显着差异。但是，对照和OTM补充饮食之间的生长没有显着差异。尤其是，用0.075％OTM饲喂日粮的大菱specific具有比0.15％，0.1125％和0.0375％OTM处理显着更高的比生长速率（p <.05）。整个鱼体内的水分，粗蛋白，粗脂和灰分在饮食处理之间没有显着差异。OTM处理量为0.1125％和0.15％的大菱turbo饲粮的血清中超氧化物歧化酶的活性显着高于0.0375％OTM处理（p  <.05）。当给大菱were饲喂0.075％OTM时，血清总抗氧化能力和过氧化氢酶活性最高，丙二醛含量最低。总而言之，本研究结果表明，日粮中添加0.0375％或更多的OTM可以获得与ITM预混料商业化日粮相似的性能，基于大麦of的日粮中OTM的最佳添加量约为0.075％。生长性能和抗氧化能力。