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首页> 外文期刊>Aquaculture International >Spirulina platensis in rainbow trout (Oncorhynchus mykiss) feed: effects on growth, fillet composition, and tissue antioxidant mechanisms
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Spirulina platensis in rainbow trout (Oncorhynchus mykiss) feed: effects on growth, fillet composition, and tissue antioxidant mechanisms

机译：彩虹鳟鱼（Oncorhynchus mykiss）饲料中的螺旋藻浆料：对生长，圆角组成和组织抗氧化机制的影响

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摘要

An experiment was conducted to investigate the effects of Spirulina platensis (SP) on growth, fillet composition, and intestinal, skin, and gill mucosal antioxidants of rainbow trout, Oncorhynchus mykiss (initial weight 17.18 +/- 0.59 g). One-hundred and thirty-five fish were randomly distributed among nine cement tanks (1.8 m x 022 m x 0.35 m) with 15 fish per tank. Three isonitrogenous (37.8% crude protein) feeds containing either 0, 2.5, or 5% SP were prepared, randomly assigned to triplicate tanks of fish, and given at 2% body weight per day for 7 weeks. At the end of the trial, fish in each tank were assessed for growth (final weight, thermal growth coefficient), condition factor, fillet composition, mucosal antioxidant activity, and gene expression analysis related to the antioxidant enzymes catalase, glutathione peroxidase 1, and glutathione S-transferase. Neither growth nor fillet composition was influenced by inclusion of SP in feed. Total antioxidant activity in three mucosal tissues including the intestine, skin, and gill was significantly increased by 2.5% SP whereas administration of 5% SP only increased total antioxidant activity in the intestine. Feeding fish with 2.5% and 5% SP could upregulate the expression of catalase in the intestinal tissue whereas 5% SP enhanced the expression of glutathione peroxidase 1 in this tissue. Glutathione S-transferase gene expression was also increased in the intestinal and skin tissues of fish administrated with 2.5% SP while in the fish that received 5% SP-supplemented diet, an upregulation of this gene was only noted in the intestinal tissue. It was concluded that 2.5% SP had a potential to enhance some antioxidant parameters mostly in the intestine, followed by the skin and gill.
机译：进行了实验，以研究螺旋藻（SP）对生长，圆角组合物和肠道，皮肤和鳃粘膜粘膜抗氧化剂的影响，Oncorhynchus mykiss（初始重量17.18 +/- 0.59g）。一百三十五条鱼在九个水泥罐中随机分布（1.8米×0222米×0.35米），每罐15条鱼。制备含有0,2.5或5％SP的三种异鼻（37.8％的粗蛋白）进料，随机分配到鱼的三份罐中，每天2％的体重为7周。在试验结束时，评估每个罐中的鱼类（最终重量，热生长系数），条件因子，圆角组合物，粘膜抗氧化活性，以及​​与抗氧化酶过氧化酶，谷胱甘肽过氧化物酶1相关的基因表达分析谷胱甘肽S-转移酶。既不是通过饲料中包含SP的增长或圆角组合物。在包括肠，皮肤和鳃的三种粘膜组织中的总抗氧化活性显着增加2.5％SP，而施用5％SP仅增加肠道中的总抗氧化活性。饲喂2.5％和5％SP的鱼可以上调肠组织中的过氧化氢酶的表达，而5％SP可以增强该组织中谷胱甘肽过氧化物酶1的表达。在含有2.5％SP的鱼类的肠道和皮肤组织中也增加了谷胱甘肽S-转移酶基因表达，同时在接受5％SP补充饮食的鱼中，该基因的上调仅在肠组织中注意到该基因。得出结论，2.5％SP有可能在肠道中提高一些抗氧化剂参数，其次是皮肤和鳃。

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