This study investigated the effects of Adonis aestivalis extract rich in astaxanthin on the pigmentation and antioxidative status of rainbow trout. Five diets were designed as the control diet, the synthetic astaxanthin diet with astaxanthin inclusion of 100 mg/kg, and A. aestivalis extract‐supplemented diets with 1.7, 3.4 and 6.8 g/kg extract addition containing 50, 100 and 200 mg/kg astaxanthin, respectively. Then, the five diets were fed to rainbow trout with an initial body weight of 6.27 ± 0.04g for 6 weeks. Compared to the control group, the supplementation of A. aestivalis extracts significantly increased the redness(a*) and yellowness(b*), and decreased the flesh drip loss and thawing loss (p < .05). T‐SOD and MDA in flesh and serum were significantly decreased, and the inhibition ability of –OH was increased in all the astaxanthin‐supplemented groups (p < .05). The redness(a*), astaxanthin content and antioxidant indexes of 3.4 g/kg extract group showed the similar levels to the synthetic astaxanthin group (p > .05). In conclusion, dietary A. aestivalis extract improved the flesh colour and the antioxidative status of rainbow trout, and the supplemental level was suggested to be 3.4 g/kg with astaxanthin inclusion of 100 mg/kg diet.

中文翻译：

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饮食阿多尼斯。青蒿提取物可改善虹鳟鱼的果肉色素沉着，抗氧化状态和保质期（Oncorhynchus mykiss）

这项研究调查了丰富的虾青素Adonis aestivalis提取物对虹鳟鱼色素沉着和抗氧化状态的影响。五个饮食被设计为控制饮食，合成虾青素的饮食与虾青素包含100毫克/千克，和甲。补充 1.7、3.4和6.8 g / kg提取物的Aestivalis补充饮食，分别含有50、100和200 mg / kg的虾青素。然后，将五种饮食饲喂初始体重为6.27±0.04g的虹鳟鱼，持续6周。相比于对照组，的补充甲。 西洋参提取物显着增加了红度（a *）和黄度（b *），并减少了果肉的滴水损失和融化损失（p  <.05）。在所有补充虾青素的组中，肉和血清中的T-SOD和MDA均显着降低，对–OH的抑制能力增强（p  <.05）。3.4 g / kg提取物组的发红（a *），虾青素含量和抗氧化指数显示出与合成虾青素组相似的水平（p  > .05）。总之，膳食一个。 青蒿提取物可改善虹鳟鱼的肉色和抗氧化状态，建议补充量为3.4 g / kg，其中虾青素含量为100 mg / kg。