Heavy metal levels in tissues (gonads and fillets) of Horse mackerel collected from Ghazaouet Bay (Western Mediterranean coast of Algeria)

The concentration levels of Zn, Pb, Cd and Cu were evaluated in the gonads and fillets of Horse mackerel (Trachurus trachurus) collected from Ghazaouet bay. The results showed the accumulation of Pb, Cd, Cu and Zn in the gonads and fillets. The metal concentrations in the fillets and gonads decreased in the following order: Zn >Cd >Pb >Cu and Zn >Cd >Cu >Pb, respectively. The levels of essential metals (zinc and copper) in both target organs generally complied with the recommended value for fish while the levels of non-essential metals like cadmium and lead, which are toxic and present in traces, greatly exceeded the recommended values in both target organs, which are ascribed mainly to the industrial pollution in Ghazaouet area. Therefore, it can be concluded that these heavy metals in different tissues of Horse mackerel, which is highly consumed in the Algerian coastal regions, could pose adverse health effects on consumers

La redécouverte des monuments antiques de l’Algérie poussée par la reconstruction des parties manquantes.

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Trace metals in sediments, macroalgae and benthic SPECIES FROM the western part of algerian coas

International audienceThe concentrations of Cd, Pb, Cu and Zn were measured in sediments and specimens of four marine organisms: green algae (Enteromorpha linza), red algae (Corallina officinalis), mollusc limpet (Patella ferruginea) and sea urchin (Paracentrotus lividus). The samples were collected at four coastal stations located in two areas in the North-Western Algerian coast: Ghazaouet and Beni-saf. These areas are influenced by anthropogenic activities (harbour and industrial and urban wastes). Metal concentrations measured in sediments and biota indicated that the area of Ghazaouet was the most polluted. We found high variability of metal bioaccumulation among the four species analysed. The highest concentrations were recorded in the algae whereas metal concentrations in sea urchin and limpet were more correlated with sediments metal concentration

Heavy metal levels in tissues (gonads and fillets) of Horse mackerel collected from Ghazaouet Bay (Western Mediterranean coast of Algeria)

263-269The concentration levels of Zn, Pb, Cd and Cu were evaluated in the gonads and fillets of Horse mackerel (Trachurus trachurus) collected from Ghazaouet bay. The results showed the accumulation of Pb, Cd, Cu and Zn in the gonads and fillets. The metal concentrations in the fillets and gonads decreased in the following order: Zn >Cd >Pb >Cu and Zn >Cd >Cu >Pb, respectively. The levels of essential metals (zinc and copper) in both target organs generally complied with the recommended value for fish while the levels of non-essential metals like cadmium and lead, which are toxic and present in traces, greatly exceeded the recommended values in both target organs, which are ascribed mainly to the industrial pollution in Ghazaouet area. Therefore, it can be concluded that these heavy metals in different tissues of Horse mackerel, which is highly consumed in the Algerian coastal regions, could pose adverse health effects on consumers

Antimicrobial and antiparasitic activities of three algae from the northwest coast of Algeria

<p>The objective of this study was to investigate the biological activities of Algerian algae, <i>Sargassum vulgare, Cladostephus hirsutus</i> and <i>Rissoella verruculosa</i>. Antimicrobial activity of the crude extracts and their fractions was assessed using the disc diffusion assay, the minimum inhibitory concentration and the minimum bactericidal concentration. Antiparasitic activity was studied <i>in vitro</i> against the blood stream forms of <i>Trypanosoma brucei brucei</i> and the intraerythrocytic stages of <i>Plasmodium falciparum</i>. Ethyl acetate (EA) fractions of the three tested algae showed more potent antimicrobial activity against <i>S</i>. <i>aureus</i> (7–14.5 mm) and <i>B</i>. <i>cereus</i> (7–10.75 mm), MIC values ranged from 0.9375 to 7.5 mg mL⁻¹ and MBC values > 15 mg mL⁻¹. Concerning the antiparasitic activity, EA factions of <i>S. vulgare</i> (IC₅₀ = 9.3 μg mL⁻¹) and <i>R. verruculosa</i> (IC₅₀ = 11.0 μg mL⁻¹) were found to be more effective against <i>T. brucei brucei</i>, whereas the three EA fractions were little active against <i>P. falciparum</i>.</p