title: Heavy metal accumulation in Diplodus annularis, Liza aurata, and Solea vulgaris relevant to their concentration in water and sediment from the southwestern Mediterranean (coast of Sfax).
abstract: The concentrations of heavy metals (Cd, Cu, Fe, Pb, Ni, and Zn) were measured in the liver, gills, and muscle of Solea vulgaris, Liza aurata, and Diplodus annularis, collected from the south coast of Sfax (Gabes Gulf, southwestern Mediterranean). The concentrations of heavy metals in water exhibited the following decreasing order (expressed in μg l(-1)): Fe > Ni > Zn > Cu > Pb > Cd whereas the trend is somewhat different in sediments (mg kg(-1) D.W.) Fe > Zn > Pb > Ni > Cu > Cd. The levels of heavy metals varied significantly among fish species and tissues. Heavy metal levels were found generally higher in the liver and gills than the muscle in all species. The liver was the target organ for Cd, Cu, Fe, Ni, and Zn accumulation. Nickel and lead, however, exhibited their highest concentrations in the gills. The three studied fishes showed a difference in metals accumulation decreasing in following order S. vulgaris > D. annularis > L. aurata. Solea vulgaris with the highest TFwater, TFsediment, and metal concentrations in tissues would be considered as a potential bio-indicator in the south coast of Sfax for the assessment of environmental pollution status. Comparative studies with Luza zone indicate considerable bioaccumulation of heavy metals (Pb and Zn) in the various tissues of fish samples of the south coast of Sfax.
authors.affiliation: Biodiversity and Aquatic Ecosystems UR/11ES72 Research Unit, Department of Life Sciences Research, Sfax Faculty of Sciences, University of Sfax, Street of Soukra Km 3.5. BP 1171, PO Box 3000, Sfax, Tunisia. bensalemzohra@gmail.com.|Laboratoire de Chrono-Environnement, Université de Franche-Comté, UMR CNRS 6249 1, Place Leclerc, F-25030, Besançon cedex, France. bensalemzohra@gmail.com.
authors.forename: Zohra
authors.initials: Z
authors.lastname: Ben Salem
authors.affiliation: Biodiversity and Aquatic Ecosystems UR/11ES72 Research Unit, Department of Life Sciences Research, Sfax Faculty of Sciences, University of Sfax, Street of Soukra Km 3.5. BP 1171, PO Box 3000, Sfax, Tunisia.
authors.forename: Habib
authors.initials: H
authors.lastname: Ayadi
mesh_terms: D000818:Animals; D004784:Environmental Monitoring; D005399:Fishes / Q000378:metabolism*; D019015:Geologic Sediments / Q000737:chemistry*; D005880:Gills / Q000737:chemistry; D019216:Metals, Heavy / Q000737:chemistry* / Q000378:metabolism; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000378:metabolism
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D014867:Water
keywords: Bioaccumulation; Diplodus annularis; Heavy metals; Liza aurata; Sfax south coast; Solea vulgaris