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首页> 外文期刊>Turkish Journal of Fisheries & Aquatic Sciences >Effect of dietborne Cu and Cd on body indices of Nile tilapia (Oreochromis niloticus) with emphasis on protein pattern.
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Effect of dietborne Cu and Cd on body indices of Nile tilapia (Oreochromis niloticus) with emphasis on protein pattern.

机译：饮食中铜和镉对尼罗罗非鱼（Oreochromis niloticus）身体指标的影响，重点是蛋白质模式。

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摘要

The diet-borne Cu in minute concentrations are essential for vital functions in fish, whereas Cd is not essential for any vital activity. Fish diets can be contaminated by different metals. This study was conducted to assess the toxic effects of diets contaminated with Cu, Cd or their mixture on Nile tilapia (Oreochromis niloticus). It was recorded that the condition factor (K), hepatosomatic index (HSI) and gonadosomatic index (GSI) exhibited significant reduction in fish fed diet-borne Cu, Cd, and Cu+Cd. The total sarcoplasmic protein showed a slight reduction after 10 days of exposure to diet-borne metals, but significantly increased after 20 and 30 days. The total sarcoplasmic nitrogen content of O. niloticus also increased in affected fishes. The total plasma protein, albumin and globulin increased due to high dietary Cu or Cd or Cu+Cd intake. Fish fed with Cu contaminated diet for 10 days exhibited the disappearance of the last four sarcoplasmic protein fractions (sensitive proteins). Cd contaminated diet induced the disappearance of the ninth fraction of sarcoplasmic protein when fed to fishes for 10 days. Feeding Cu+Cd contaminated diet for 10 days caused the disappearance of the last sarcoplasmic protein fraction, though bands number 7 and 8 faintly appeared. It is concluded that fish diet contaminated with Cu, Cd or their mixture induce deleterious effects of fish body indices as well as sarcoplasmic protein pattern. Thus, high diet-borne intake of tested metals induce toxic effects on O. niloticus.
机译：饮食中的微量铜对鱼类的重要功能至关重要，而镉对任何重要活动都不重要。鱼的饮食可能被不同的金属污染。进行这项研究是为了评估受铜，镉或它们的混合物污染的饮食对尼罗罗非鱼（Oreochromis niloticus）的毒性作用。据记录，以鱼为食的饮食中所含的铜，镉和铜+镉，条件因子（K），肝体指数（HSI）和性腺激素指数（GSI）显着降低。暴露于饮食中的金属10天后，总的肌浆蛋白略有减少，但在20天和30天后显着增加。在受影响的鱼类中，尼罗罗非鱼的总胞质氮含量也增加了。总血浆蛋白，白蛋白和球蛋白的增加归因于高饮食中铜或镉或铜+镉的摄入。用铜污染的饲料喂养10天的鱼表现出最后四个肌浆蛋白组分（敏感蛋白）的消失。镉污染的饮食喂养十天后会导致肌浆蛋白第九部分的消失。饲喂受Cu + Cd污染的饮食10天后，尽管出现了7号和8号带，但最后一个肌浆蛋白部分却消失了。结论是，受铜，镉或它们的混合物污染的鱼饲料对鱼的身体指数和肌浆蛋白模式具有有害作用。因此，高膳食摄入的被测金属对尼罗罗非鱼有毒作用。

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