The present study aims to assess the effects of contamination of the Agadir bay coasts using bivalves as a biomonitoring sentinel species. Seasonal variations of biochemical composition in terms of total protein content and oxidative stress biomarkers including glutathione-S-transferase, malondialdehyde, catalase and acetylcholinesterase were evaluated in the soft tissues of Scrobicularia plana and Donax trunculus specimens. The latter were collected from two sites in Agadir bay during two-year span (2018–2020). The Integrated Biomarker Response Index (IBR) was performed to classify the stress response in both species and to assess the level of exposure to xenobiotics. The data showed maximum annual values of acetylcholinesterase and malondialdehyde for Donax trunculus in Agadir beach (AG) with 6.25 nmol/mn/mg and 3 nmol/mg of protein, respectively. Those of catalase and glutathione-S-transferase for Scrobicularia plana in Oued Souss estuary (OS) were of 4.41 μmol/mn/mg and 14.43 nmol/mn/mg of protein, respectively. The studied species are considered good indicators in aquatic ecosystems.

本研究旨在评估使用双壳贝类作为生物监测哨兵物种对阿加迪尔湾沿岸污染的影响。在Scrobicia plana和Donax trunculus标本的软组织中评估了总蛋白含量和氧化应激生物标志物（包括谷胱甘肽-S-转移酶、丙二醛、过氧化氢酶和乙酰胆碱酯酶）的生化成分的季节性变化。后者是在两年期间（2018-2020 年）从阿加迪尔湾的两个地点收集的。进行综合生物标志物反应指数 (IBR) 以对两种物种的应激反应进行分类并评估外源性物质的暴露水平。数据显示了唐纳克斯的乙酰胆碱酯酶和丙二醛的最大年度值在阿加迪尔海滩 (AG) 中，蛋白质含量分别为 6.25 nmol/mn/mg 和 3 nmol/mg。过氧化氢酶和谷胱甘肽-S-转移酶对 Oued Souss 河口 (OS) 的Scrobicularia plana的蛋白质含量分别为 4.41 μmol/mn/mg 和 14.43 nmol/mn/mg。所研究的物种被认为是水生生态系统中的良好指标。