ABSTRACT The condition of river water quality can be considered as a potential source of oxidative stress of river organisms. The objective of this study was to evaluate the activities of superoxide dismutase (SOD), catalase (CAT) and the levels of malondialdehyde (MDA) in three genera of aquatic insects namely Chrironominae, Gomphus and Lestes collected from Karang Mumus River, Pampang River, and Nabah River of East Kalimantan, Indonesia. Aquatic insects were collected using Ekman-Grab, Surber net and Kick net. Determinations of SOD, CAT and MDA were conducted in all aquatic insect samples. Physical-chemical parameters of environmental quality were also measured in all rivers. Visual observation showed that the turbidities of water were in the order: Karang Mumus River>Pampang River> Nabah River. The highest SOD, CAT and MDA were recorded in Chironominae and Gomphus live in the Karang Mumus River, and the lowest recorded in Nabah River. The SOD and CAT activities in Lestes were not significantly different in all rivers, however Lestes in Nabah showed the highest MDA. The oxidative responses of Chironominae and Gomphus most likely affected by the water turbidity. Meanwhile, the high level of MDA in Lestes most probably related to the metals’ levels both in sediment and water.

中文翻译：

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印度尼西亚东加里曼丹河流中大型无脊椎动物对环境变量的氧化反应

摘要 河流水质状况可以被认为是河流生物氧化应激的潜在来源。本研究的目的是评估从 Karang Mumus 河、Pampang River、Pampang 河、Chrironominae、Gomphus 和 Lestes 三个水生昆虫属中超氧化物歧化酶 (SOD)、过氧化氢酶 (CAT) 和丙二醛 (MDA) 的水平。和印度尼西亚东加里曼丹的纳巴河。使用 Ekman-Grab、Surber net 和 Kick net 收集水生昆虫。对所有水生昆虫样品进行了 SOD、CAT 和 MDA 的测定。还测量了所有河流的环境质量物理化学参数。目视观察表明，水的浊度顺序为：Karang Mumus River>Pampang River> Nabah River。最高的 SOD，CAT 和MDA 记录在Karang Mumus 河的Chironominae 和Gomphus 中，最低记录在Nabah 河。Lestes 的 SOD 和 CAT 活性在所有河流中都没有显着差异，但 Nabah 的 Lestes 表现出最高的 MDA。Chironominae 和 Gomphus 的氧化反应最有可能受水浊度的影响。同时，莱斯特的高水平 MDA 很可能与沉积物和水中的金属含量有关。