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Levels of heavy metals and metallothioneins in liver and muscle tissue of demersal fish species from the Moroccan Atlantic area

Author Affiliations

  • 1Faculté des Sciences Ben M’Sik, Avenue Cdt Driss El Harti, B.P 7955, Casablanca. Maroc and Institut National de Recherche Halieutique, Route Sidi Abderrahmane, Casablanca, Maroc
  • 2Faculté des Sciences Ben M’Sik, Avenue Cdt Driss El Harti, B.P 7955, Casablanca. Maroc
  • 3Faculté des Sciences Ain Chock, Km 8 Route d\'El Jadida, B.P 5366, Casablanca, Maroc
  • 4Institut National de Recherche Halieutique, Route Sidi Abderrahmane, Casablanca, Maroc
  • 5Institut National de Recherche Halieutique, Route Sidi Abderrahmane, Casablanca, Maroc
  • 6Faculté des Sciences Ain Chock, Km 8 Route d\'El Jadida, B.P 5366, Casablanca, Maroc
  • 7Institut National de Recherche Halieutique, Route Sidi Abderrahmane, Casablanca, Maroc
  • 8Institut National de Recherche Halieutique, Route Sidi Abderrahmane, Casablanca, Maroc

Int. Res. J. Environment Sci., Volume 7, Issue (2), Pages 1-17, February,22 (2018)


The concentration of trace metallic elements (Cu, Fe, Zn, Mn, Cd, Cr and Pb) was determined in two accumulation organs (liver and muscle) of five fish species (Zeus faber, Merluccius merluccius, Pagellus acarne, Diplodus vulgaris and Chelidonichthys lastoviza) which were collected from coastal, median, and wide stations along the southern Moroccan Atlantic coast. The sampling was carried out in 2 campaigns: during the summer 2013 (period of strong upwelling) and in autumn 2013 (period of low upwelling). Statistical tests showed no significant differences in the accumulation of metals over time. The results obtained showed that the TME average concentrations in the liver were respectively 0.08, 4.29, 381.44, 21.26, 172.19, 11.13, 0.29 ppm of fresh weight in the liver and 0.10, 0.70, 20.13, 0.95, 16.96, 0.03, 0.10 ppm in the muscle. The Metallothioneins (MT) were used as exposure biomarker. MT was used as exposure biomarkers of Z.faber to TME. Their grades vary according to the accumulation organ independently of the sampling season. The maximum levels in the consumable part of the fish remain below the tolerable levels for human consumption as recommended by international standards.


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