ABSTRACT: There is a paucity of information about the influence of ploidy status on physiological parameters in organisms following contaminant stress. Also, little is known about the changes in nutritional values of fishes in response to the exposure to contaminants. Full-sibling juvenile Clarias gariepinus were exposed to 3 levels (mean measured 8.9, 17.5, or 28.0 µg l^-1) of chlorpyrifos for 21 d. The levels of 3 fatty acids (FAs) in the muscle were significantly different between unexposed diploid and triploid fish. In the chlorpyrifos-exposed fish, the levels of most amino acids (AAs), some FAs, protein, and moisture content were affected in the muscle of diploids, while the levels of some FAs and ash content were changed in the muscle of triploid fish. This work represents the first study of changes in FAs and proximate composition in triploid animals in response to environmental stressors. Fewer changes of nutritional values in triploid C. gariepinus under chlorpyrifos exposure may indicate higher adaptability of triploids than diploids towards environmental stressors. Significant changes in the muscle protein content and AA and FA compositions in diploid Clarias gariepinus in response to chlorpyrifos exposure suggest their application as sensitive indicators of aquatic environmental pollution.

中文翻译：

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毒死rif暴露后二倍体和三倍体非洲African鱼Clarias gariepinus的营养参数变化

摘要：在受污染胁迫后，关于倍性状态对生物体生理参数的影响的信息很少。同样，人们对鱼类的营养价值响应暴露于污染物的变化知之甚少。将全兄弟的少年Clarias gariepinus暴露于3种水平（平均值为8.9、17.5或28.0 µg l ^-1）毒死rif 21 d。未接触的二倍体和三倍体鱼的肌肉中3种脂肪酸（FAs）的水平显着不同。在毒死rif暴露的鱼中，二倍体肌肉中大多数氨基酸（AAs）的水平，某些脂肪酸，蛋白质和水分含量受到影响，而三倍体鱼的肌肉中某些脂肪酸和灰分的含量发生了变化。 。这项工作代表了三倍体动物响应环境应激因素而改变FAs和附近成分的研究。在毒死rif暴露下，三倍体C. gariepinus的营养价值变化较少，可能表明三倍体对环境胁迫的适应性高于二倍体。二倍体肌肉蛋白质含量以及AA和FA组成的显着变化响应毒死exposure的非洲胡子suggest（Clarias gariepinus）表明它们被用作水生环境污染的敏感指标。