The aquatic pollution due to sawmill wood wastes constitutes a major threat to hydro-chemical and fauna characteristics of the aquatic ecosystems. When this kind of organics wastes enter aquatic environment it can be taken up by aquatic organisms through respiration and/or through their diet. This could concurrently result in oxidative stress and later having adverse effect on physiological and biochemical function. The importance of fish in the society cannot be over emphasized, hence there is the need to know the influence of sawmill wood wastes on the water quality and fish.

Therefore, this work aims to study the impact of five species of wood wastes on a type of fish named common carp (Cyprinus carpio) known as the most widely cultured fish species in the world and on its aquatic environment. The monitoring of water parameters showed deterioration in water quality. The activities of superoxide dismutase (SOD), Catalase (CAT), glutathione peroxidase (GPx) and lipid peroxidation (MDA) were investigated to evaluate the degree of oxidative stress. According to t-student, there was a significant difference compared to control (P < 0.05) in the level of SOD, CAT, GPx and MDA activities in fish exposed to 5 g·l⁻¹ of each sawdust except for GPx, a non-significant difference (p > 0.05) was noted in the case of Beech and Dibetou. When the dispersed amount was about 0.375 g·l⁻¹ we noted a significant difference in the level of SOD and GPx, except for GPx a non-significant difference was detected in the case of Cedar. The level of CAT was significantly difference just in the case of Cedar and Dibetou and that of MDA was significantly difference just in the case of Beech and Mahogany.

We conclude therefore that sawmill wood waste not only impact the water quality adversely but also alters the levels of different enzymes activities in Cyprinus Carpio fish by the inhibition of SOD, CAT and GPx activities and by the production of MDA, which reflects response to oxidative stress. This study provides a rational use of these enzymes as suitable biomarkers with different degrees of specificity and as important tool for environmental monitoring.

锯木厂木材废料造成的水生污染对水生生态系统的水化学和动物区系构成了重大威胁。当这类有机废物进入水生环境时，水生生物可以通过呼吸和/或饮食来吸收这些有机物。这可能同时导致氧化应激，随后对生理和生化功能产生不利影响。鱼在社会中的重要性不能过分强调，因此有必要了解锯木厂木材废物对水质和鱼的影响。

因此，这项工作旨在研究五种木材废料对一种名为鲤鱼（鲤鱼）的鱼及其对水生环境的影响，鲤鱼是世界上养殖最广泛的鱼种。水参数的监测表明水质恶化。研究了超氧化物歧化酶（SOD），过氧化氢酶（CAT），谷胱甘肽过氧化物酶（GPx）和脂质过氧化物（MDA）的活性，以评估氧化应激的程度。根据t-学生，暴露于5 g·l ^-1的鱼的SOD，CAT，GPx和MDA活性水平与对照组相比有显着差异（P <0.05）。除GPx以外，每种木屑的比重都没有显着差异（p> 0.05）。当分散量为约0.375g·l ^-1时，我们注意到SOD和GPx的水平存在显着差异，除了GPx以外，在雪松中未检测到显着差异。CAT的水平仅在Cedar和Dibetou中显着不同，而MDA的水平在Beech和桃花心木中则显着不同。

因此，我们得出结论，锯木厂木材废料不仅会对鲤鱼的水质产生不利影响，而且还会通过抑制SOD，CAT和GPx活性以及产生MDA（反映对氧化应激的反应）来改变鲤鱼中不同酶的水平。。这项研究合理地使用了这些酶，将其作为具有不同程度特异性的合适生物标志物，并作为环境监测的重要工具。