Distribution of Mercury and Other Trace Metals in the Cockle Cerastoderma glaucum from the Mediterranean Lagoon Etang de Thau

Szefer, Piotr; Wołowicz, Maciej; Kusak, A.; Deslous-Paoli, Jean-Marc; Czarnowski, Wojciech; Frelek, K.; Belzunce, Marı́a Jesús

doi:10.1007/s002449900442

Cited by 34 publications

(15 citation statements)

References 24 publications

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“…However there are no studies about the cockle C. glaucum. This species was validated in previous studies as a biomonitor organism showing correlation between site contamination and metal accumulation (Szefer and Szefer 1985;Szefer and Wolowicz 1993;Arjonilla et al 1994;Szefer et al 1999;Machreki-Ajmi and Hamza-Chaffai 2006). Moreover, C. glaucum lives in the superficial sediment, and together with R. decussatus could provide a couple of bivalves for pollution biomonitoring along Tunisian coasts.…”

Section: Introductionmentioning

confidence: 91%

The effect of in situ cadmium contamination on some biomarkers in Cerastoderma glaucum

et al. 2007

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The present study was designed to detect in situ effects of cadmium on marine organisms Cerastoderma glaucum from the gulf of Gabès (Tunisia). Six sampling stations were chosen: one site, relatively far from known local source of pollution, was considered as uncontaminated site and five sites clearly exposed to anthropogenic impact. Metallothionein like protein (MTLP) and sub-cellular metal partitioning were measured in cockles (C. glaucum) gills and digestive gland. Various biomarkers were also measured, including malondialdehyde (MDA) in the digestive gland and acetylcholinesterase activity (AChE) in the remainder. The health status of the cockles was assessed by using the condition index (CI). Significant differences between sites were noted for Cd concentrations, (CI) and also for the three studied biomarkers. Significant higher biomarkers response was measured in cockles from stations located in the northern part of the gulf, which are exposed directly to industrial and urban effluents, whereas the response of most biomarkers was minimal at the reference station. Positive and significant correlations were observed between MTLP and Cd concentrations in the digestive gland and in the gills. However, it must be noted that these correlations were more significant in the digestive gland, suggesting that compared to the gills, the digestive gland of C. glaucum is more suitable for monitoring metal pollution. The subcellular distribution of Cd showed that the soluble fraction was the major compartment for Cd storage, a pattern which is due to the role of MTLP in Cd detoxication. But at the most contaminated site (EH), cadmium in the digestive gland was preferentially accumulated in the insoluble fraction (P1) suggesting that the MTLP capacity in binding metals was not sufficient to avoid the binding of Cd to the insoluble fraction. Furthermore, the MTLP concentrations in the cockles from this site are lower than expected. So in highly polluted sites, MTLP in C. glaucum should not be used as a useful biomarker for metal pollution. The lipid peroxidation as presented by malondialdehyde levels, and MT-like protein concentrations increased in cockles exposed to cadmium contamination. We can, therefore, hypothesize that Cd could induce MTLP synthesis and MDA increase. While AChE had distinct and specific pattern showing that cadmium is not the only factor of the inhibition of cholinesterase activity. There are other polluting inputs engendering this inhibition.

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Section: Introductionmentioning

confidence: 91%

The effect of in situ cadmium contamination on some biomarkers in Cerastoderma glaucum

et al. 2007

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“…Metal bioaccumulation in soft tissues of cockles (SZEFER et al, 1999), mussels (LABONNE, BEN OTHMAN, and LUCK, 2001), and oysters (AMIARD et al, 2007) from the Thau Lagoon has also been documented. Nevertheless, metal concentrations in shellfish monitored by the French National Observation Network (RNO, IFREMER) have never exceeded the maximum allowed concentrations for consumption as determined by EU regulations.…”

Section: Introductionmentioning

confidence: 92%

Trace-Metal Biogeochemistry in the Mediterranean Thau Lagoon, a Shellfish Farming Area

Kawakami¹,

Seidel²,

Elbaz-Poulichet³

et al. 2008

Journal of Coastal Research

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“…In other bivalves, Patel and Anthony [74] reported that the highest Cd concentration was found in the gills of Anadara granosa. Szefer et al [75] found that the gills of cockle Cerastoderma glaucum contained highest concentrations of Co and Ni than other organs. The high bioconcentration factor in a metal free medium in mussel gills indicated that the gills were the sites of dominance for Pb and Zn assimilation in M. edulis [76].…”

Section: Fig 1 -High Bioaccumulation Ability Of Mya Arenaria For Butmentioning

confidence: 99%

Biomonitoring: An appealing tool for assessment of metal pollution in the aquatic ecosystem

Zhou

Zhang

et al. 2008

Analytica Chimica Acta

765

348

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Distribution of Mercury and Other Trace Metals in the Cockle Cerastoderma glaucum from the Mediterranean Lagoon Etang de Thau

Cited by 34 publications

References 24 publications

The effect of in situ cadmium contamination on some biomarkers in Cerastoderma glaucum

The effect of in situ cadmium contamination on some biomarkers in Cerastoderma glaucum

Trace-Metal Biogeochemistry in the Mediterranean Thau Lagoon, a Shellfish Farming Area

Biomonitoring: An appealing tool for assessment of metal pollution in the aquatic ecosystem

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