Tifarouine Loubna, Aziz Faissal, El Abidi Abdallah, Hichami Nawal, Benmokhtar Salma, Badaoui Bouabid, Rguibi Idrissi Hamid, Fekhaoui Mohamed, Benhoussa Abdelaziz
Plant and Microbial Biotechnology, Biodiversity and Environment Center, Biodiversity-Ecology and Genome Laboratory, Faculty of Sciences, Mohammed V University, Rabat, Morocco.
Laboratory of Hydrobiology, Ecotoxicology, Sanitation and Global Change (LHEAC, URAC33), Faculty of Sciences Semlalia, Marrakech, Morocco.
Saudi J Biol Sci. 2019 Nov;26(7):1682-1688. doi: 10.1016/j.sjbs.2018.08.017. Epub 2018 Aug 17.
The influence of age and sex on the bioaccumulation of heavy metals in Apodemus sylvaticus was studied in Merja Zerga lagoon in northern Morocco. Five trace metal elements (Zn, Pb, Cr, Cu and Fe) were quantitatively analyzed by Varian AA 240 atomic absorption spectroscopy with graphite furnace in three organs (Liver, Kidney and Heart) from animals of different age and sex. The maximum metal level of the analyzed samples was recorded in adults and was limited to 46.62 μg/g for Pb and 35.1 μg/g for Cu, while it reached 22.69 μg/g, 7.59 μg/g and 6.78 μg/g for Cr, Zn and Fe, respectively. Highly significant differences were found for bioaccumulation of heavy metals according to animal ages and no significant differences were observed between the two sexes among the studied animals. Our results revealed also the existence of a strong correlation (r > 0.65) between the majority of biometric parameters and the trace element concentrations. In general, we found that age is a critical factor in estimating the level of heavy metal pollution. Other characteristics such as habitat, feeding habits and anti-predator behavior of the species need to be studied.
在摩洛哥北部的梅尔贾泽尔加泻湖研究了年龄和性别对林地鼠重金属生物累积的影响。采用瓦里安AA 240石墨炉原子吸收光谱法对不同年龄和性别的动物的肝脏、肾脏和心脏三个器官中的五种痕量金属元素（锌、铅、铬、铜和铁）进行了定量分析。分析样本中的最高金属含量记录在成年动物中，铅的最高含量为46.62μg/g，铜为35.1μg/g，而铬、锌和铁的最高含量分别达到22.69μg/g、7.59μg/g和6.78μg/g。根据动物年龄，重金属生物累积存在极显著差异，在所研究的动物中两性之间未观察到显著差异。我们的结果还揭示了大多数生物特征参数与微量元素浓度之间存在强相关性（r>0.65）。总体而言，我们发现年龄是估计重金属污染水平的关键因素。该物种的其他特征，如栖息地、食性和反捕食行为等需要进一步研究。
