Influence of age on the bioaccumulation of heavy metals in Apodemus sylvaticus at Merja Zerga lagoon,Morocco |
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Authors: | Loubna Tifarouine Faissal Aziz Abdallah El Abidi Nawal Hichami Salma Benmokhtar Bouabid Badaoui Hamid Rguibi Idrissi Mohamed Fekhaoui Abdelaziz Benhoussa |
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Institution: | 1. Plant and Microbial Biotechnology, Biodiversity and Environment Center, Biodiversity-Ecology and Genome Laboratory, Faculty of Sciences, Mohammed V University, Rabat, Morocco;2. Laboratory of Hydrobiology, Ecotoxicology, Sanitation and Global Change (LHEAC, URAC33), Faculty of Sciences Semlalia, Marrakech, Morocco;3. National Institute of Health, Department of Toxicology, Health Ministry, Rabat, Morocco;4. Laboratry of Biodiversity and Ecosystem Dynamics (BioDEcos), Faculty of Sciences Semlalia, Marrakech, Morocco;5. Scientific Institute, Zoological Laboratory, Mohammed V University, Rabat, Morocco |
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Abstract: | 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. |
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Keywords: | Corresponding author at: Laboratory of Hydrobiology Ecotoxicology Sanitation and Global Change (LHEAC URAC33) Faculty of Sciences Semlalia Marrakech Morocco National Centre for Research and Study on Water and Energy (CNEREE) Cadi Ayyad University Marrakech Morocco Bioaccumulation Heavy metals Merja Zerga lagoon |
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