Assessment of the trace metal levels in two species of mussels from the Agadir Marine Bay, South of Morocco

Moukrim, Abdellatif; Kaaya, A.; Najimi, S.; Roméo, Michèle; Gnassia‐Barelli, M.; Narbonne, J. F.

doi:10.1007/s001280000149

Cited by 35 publications

(11 citation statements)

References 11 publications

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“…With respect to these contaminants, the Souss Estuary can be considered as a non contaminated estuary, compared for example with that of Bilbao, Spain (Ruiz and Saiz-Salinas 2000) or the Seine Estuary, France (Chiffoleau et al 1994). These findings are in accordance with those of Moukrim et al (2000) and Banaoui et al (2004) who showed that the Agadir coastal region was not impacted by trace metal compared with industrial and urban areas located northern on the Atlantic coast. The seasonal variability can be observed in steady state situation, when no dramatic event may disturb the normal functioning of the system.…”

Section: Resultssupporting

confidence: 82%

Changes in the Sediment Trace Metal Contamination after the Commissioning of a Municipal Wastewater Treatment Plant in the Souss Estuary (South Morocco)

Moukrim

Chiffoleau

Cheggour

et al. 2008

Bull Environ Contam Toxicol

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Monthly samples of sediment were collected from the Souss estuary, to determine the changes which have occurred in the concentrations of ten metals between 2001 when the low estuary was receiving the wastewaters from Agadir city and 2003 after stopping the sewage dumping. The annual contents of Cu, Fe, Zn (in 2001) and those of Cr, Cu, Fe, Mn, Ni, Pb, and Zn (in 2003) showed significant correlations with those of Al, indicating that fluctuations of their concentrations were only due to those of the aluminosilicate fraction of the clayey sediment. After normalization of these metallic concentrations in relation to those of Al, the contents of the different metals showed insignificant correlations between both years, except for Zn which significantly dropped in 2003 and Cu which increased in 2003. The observed metallic fluctuations are more influenced by the natural conditions of the estuary than the anthropogenic ones.

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Section: Resultssupporting

confidence: 82%

Changes in the Sediment Trace Metal Contamination after the Commissioning of a Municipal Wastewater Treatment Plant in the Souss Estuary (South Morocco)

Moukrim

Chiffoleau

Cheggour

et al. 2008

Bull Environ Contam Toxicol

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“…Available studies have reported high pollution profiles in the urbanized areas, especially near the industrialized region of Casablanca-Mohamedia (Bouthir et al 2003), in Agadir bay (Moukrim et al 2000) and in the areas receiving the wastewaters of the phosphate industry plants in Safi and Jorf Lasfar Cheggour et al 2000;Kaimoussi et al 2001;Banaoui et al 2004). In these studies, the use of the mussel watch approach with the indigenous bivalve species Mytilus galloprovincialis and Perna perna provided a broad overview of the pollution status of the coastal waters regarding the extent of contamination by metals (Cd, Zn, Cu, Fe and Hg).…”

Section: Introductionmentioning

confidence: 97%

Valve movement response of the mussel Mytilus galloprovincialis to metals (Cu, Hg, Cd and Zn) and phosphate industry effluents from Moroccan Atlantic coast

et al. 2006

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Valve activity was measured in the Mediterranean mussel Mytilus galloprovincialis in response to sublethal concentrations of four metals (Hg, Cu, Zn and Cd) and two phosphate industry effluents from the Atlantic coast of Morocco. Valve movements were monitored using a proximity inductive sensor which could display all activity figures from full closure to wide opening of the shell valves. In a 1 h exposure experiments, all metals induced a decrease in the time of normal opening and the appearance of sequences of stress behaviour, including enhanced valve adductions and complete closure at high concentrations. Mercury (tested from 5 to 75 microg Hg l(-1)) was the most toxic to the valve activity, with a threshold effective concentration at 10 microg Hg l(-1) and full valve closure occurring at 50 microg Hg l(-1). Copper (15-150 microg Cu l(-1)) showed a toxic effect starting at threshold concentration of 20 microg Cu l(-1) and induced full valve closure at 150 microg Cu l(-1). Zinc (100-500 microg Zn l(-1)) was effective in reducing the time of normal opening (threshold concentration at 100 microg Zn I(-1)) but no complete closure was recorded in any of the tested concentrations. For cadmium (1000-5000 microg Cd l(-1)), the valve activity was insensitive for exposures under 2000 microg Cd l(-1). Results for the testing of several samplings of the phosphate industry effluents (Safi and Jorf Lasfar) showed that their toxicity varied over the time. The effluent of the Jorf Lasfar plant (2-9.4%) was, however, more toxic than that of Safi (1-25%). In the light of these results, the sensitivity of the valve activity of Mytilus galloprovincialis to pollutants and its usefulness for in situ monitoring of coastal pollution in Morocco are discussed.

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“…The accumulation of metals in aquatic organisms is a consequence of exposure to metals in water and sediments or through the food chain, the latter being the main route of metal transfer to humans ( 19). Moreover, some marine organisms concentrate certain metals above the level found in the surrounding environment, which makes them excellent bioindicators of pollution (3 , 9,11,13,22,24,39).…”

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confidence: 99%

Trace Elements and Metals in Farmed Sea Bass and Gilthead Bream from Tenerife Island, Spain

Rubio

Jalilli

Gutiérrez

et al. 2011

Journal of Food Protection

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The aim of this study was to determine the levels of metals (Ca, K, Na, Mg) and trace metals (Ni, Fe, Cu, Mn, Zn, Pb, Cd) in two fish species (gilthead bream [Sparus aurata] and sea bass [Dicentrarchus labrax]) collected from fish farms located along the coast of Tenerife Island. Ca, K, Na, Mg, Fe, Cu, Zn, and Mn were measured by flame atomic absorption spectrometry, whereas Pb, Cd, and Ni were determined using graphite furnace atomic absorption spectrometry. Mean Fe, Cu, Mn, and Zn contents were 3.09, 0.59, 0.18, and 8.11 mg/kg (wet weight) in S. aurata and 3.20, 0.76, 0.24, and 10.11 mg/kg (wet weight) in D. labrax, respectively. In D. labrax, Ca, K, Na, and Mg levels were 1,955, 2,787, 699.7, and 279.2 mg/kg (wet weight), respectively; in S. aurata, they were 934.7, 3,515, 532.8, and 262.8 mg/kg (wet weight), respectively. The Pb level in S. aurata was 7.28 ± 3.64 μg/kg (wet weight) and, in D. labrax, 4.42 ± 1.56 μg/kg (wet weight). Mean Cd concentrations were 3.33 ± 3.93 and 1.36 ± 1.53 μg/kg (wet weight) for D. labrax and S. aurata, respectively. All Pb and Cd levels measured were well below the accepted European Commission limits, 300 and 50 μg/kg for lead and cadmium, respectively.

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Assessment of the trace metal levels in two species of mussels from the Agadir Marine Bay, South of Morocco

Cited by 35 publications

References 11 publications

Changes in the Sediment Trace Metal Contamination after the Commissioning of a Municipal Wastewater Treatment Plant in the Souss Estuary (South Morocco)

Changes in the Sediment Trace Metal Contamination after the Commissioning of a Municipal Wastewater Treatment Plant in the Souss Estuary (South Morocco)

Valve movement response of the mussel Mytilus galloprovincialis to metals (Cu, Hg, Cd and Zn) and phosphate industry effluents from Moroccan Atlantic coast

Trace Elements and Metals in Farmed Sea Bass and Gilthead Bream from Tenerife Island, Spain

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