Methylmercury in Molluscs Along the French Coast

Claisse, Didier; Cossa, Daniel; Bretaudeau-Sanjuan, Jane; Touchard, G.; Bombled, Bruno

doi:10.1016/s0025-326x(01)00036-4

Cited by 67 publications

(41 citation statements)

References 5 publications

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“…These results are considered similar to the other data reported for marine moluscs. 5,16,[27][28][29]41 Furthermore, the study of Pastor et al 42 measuring a different suite of metals in the mussel Mytilus galloprovincialis from a polluted area in the Western Mediterranean (Spain), showed that the average of total mercury and methylmercury concentrations were similar to our results. Their results for total mercury and methylmercury ranged from 30 to 1730 μg THg kg -1 dry wt.…”

Section: Resultssupporting

confidence: 88%

“…when all sampling points were combined. 5 The study of Franco et al 17 with heavy metals in molluscs from the Basque Coast (Spain) showed that the total mercury concentrations presented no significant differences between the two mollusc species, Mytilus sp. and Crassostrea angulata.…”

Section: Resultsmentioning

confidence: 96%

“…4 Filter-feeding bivalves, such as mussels and oysters, can be expected to accumulate less methylmercury than predatory fish, and hence apparently present less of a risk to human consumers. 5 These bivalves, which are widely distributed and easily collected, are often proposed as good bioindicators of water quality, as they reflect, in a semiquantitative manner, levels of environmental pollution. 6,7 They can assimilate mercury from ingesting suspended particulate material, 8 but trace metal assimilation efficiencies depend on the inorganic and organic chemical composition of the particulate material.…”

Section: Introductionmentioning

confidence: 99%

“…13 The concentrations of mercury and methylmercury accumulated by marine molluscs are a function not only of the water quality, but also of seasonal factors, temperature, salinity, diet, spawning and individual variation. 14 Few data are available for comparative purposes on a worldwide scale, 5,[15][16][17][18] and very few data concerning mercury and methylmercury distribution through coastal food webs are available for tropical estuaries. 16,[19][20][21][22][23][24][25][26] Some estuaries in the Southeast Brazilian coast at Rio de Janeiro State, Sepetiba Bay and Guanabara Bay, have been the object of a number of environmental investigations, but very few studies have been done dealing with mercury distribution in their aquatic biota.…”

Section: Introductionmentioning

confidence: 99%

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Total and methyl mercury in different species of molluscs from two estuaries in Rio de Janeiro State

Kehrig¹,

Costa²,

Moreira³

et al. 2006

J. Braz. Chem. Soc.

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Mercúrio total e metilmercúrio foram avaliados em três espécies de moluscos (Perna pernamexilhão, Crassostrea rhizophorae -ostra, Anomalocardia brasiliana -vôngole) provenientes de dois estuários no estado do Rio de Janeiro, impactados por matéria orgânica e metais pesados. O mexilhão foi a espécie que apresentou melhor capacidade para acumular o mercúrio dentre as espécies de molusco estudadas. Foi observada uma diferença significante nas concentrações de mercúrio entre os organismos de mexilhão, fêmeas e machos (81 ± 1 μg kg -1 e 70 ± 5 μg kg -1 em peso seco respectivamente), com comprimento de concha semelhante. Entretanto, não foi observada diferença significante na percentagem de metilmercúrio entre fêmeas (64%) e machos (63%) de mexilhão. Apesar de possuírem o hábito alimentar semelhante, o mexilhão apresentou concentrações de mercúrio total e metilmercúrio superiores (76 ± 7 μg kg -1 e 48 ± 5 μg kg -1 peso seco) às da ostra (19 ± 4 μg kg -1 e 6 ± 1 μg kg -1 peso seco). Este fato pode estar relacionado com diferenças na capacidade em selecionar o tamanho de partículas e os alimentos ingeridos; também, estar refletindo a maior habilidade do mexilhão em concentrar e excretar o metilmercúrio dos seus tecidos, bem como refletindo as condições ambientais.The paper assesses methyl and total mercury concentrations in three mollusc species (Perna perna -common mussel, Crassostrea rhizophorae -mangrove oyster, Anomalocardia brasiliana -clam) from two estuaries in Rio de Janeiro State, both impacted by organic matter and heavy metals. Mussels showed higher capacity to accumulate mercury compared to the other mollusc species (oyster, clam). A significant difference was observed between mercury concentration in the female mussel organisms and in males (81 ± 1 μg kg -1 dry wt. and 70 ± 5 μg kg -1 dry wt. respectively) with similar total shell length. No significant difference was observed among the % MeHg in the female (64%) and male (63%) mussel organisms. Even though the feeding habits of the molluscs are similar; mussels presented higher mercury and methylmercury concentrations in their soft tissues (76 ± 7 μg kg -1 dry wt. and 48 ± 5 μg kg -1 dry wt.) than oysters (19 ± 4 μg kg -1 dry wt. and 6 ± 1 μg kg -1 dry wt.). This is possible related to their capacity to select particle size and the composition of the ingested food they assimilate, and also reflects the greater ability of mussels to concentrate and excrete methylmercury and also to reflect their environmental conditions.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Total and methyl mercury in different species of molluscs from two estuaries in Rio de Janeiro State

Kehrig¹,

Costa²,

Moreira³

et al. 2006

J. Braz. Chem. Soc.

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show abstract

“…MeHg is present in aquatic food with the highest level occurring in predatory fishes, particularly those at the top of the aquatic food chain (Claisse et al, 2001;Cossa et al, 1989). In order to be conservative, it is assumed that all the mercury present in fish is MeHg.…”

Section: Methylmercurymentioning

confidence: 99%

Opinion of the Scientific Panel on contaminants in the food chain [CONTAM] related to the safety assessment of wild and farmed fish

2005

EFSA Journal

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Biomagnification of mercury through the benthic food webs of a temperate estuary: Masan Bay, Korea

Kim

Shin

et al. 2012

Enviro Toxic and Chemistry

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The authors examined food web magnification factors of total mercury (THg) and methylmercury (MeHg) for the benthic organisms in Masan Bay, a semiclosed, temperate estuary located on the southeastern coast of Korea. For benthic invertebrates, concentrations of THg and MeHg (%MeHg) ranged from 9.57 to 195 and 2.56 to 111 ng/g dry weight (12.2-85.6%), respectively. Benthic fish THg and MeHg (%MeHg) concentrations ranged widely from 10.8 to 618 and 2.90 to 529 ng/g dry weight (22.9-93.9%), respectively. The linear regression slopes of log [Hg] relative to δ(15)N (i.e., food web magnification factors) found for the Masan Bay benthic organisms were 0.119 for THg and 0.168 for MeHg. These values are similar to the food web magnification factors of benthic organisms and lower than those of pelagic organisms of various coastal marine environments. It suggests that pelagic organisms might be at greater risk of THg and MeHg accumulation than benthic biota.

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Methylmercury in Molluscs Along the French Coast

Cited by 67 publications

References 5 publications

Total and methyl mercury in different species of molluscs from two estuaries in Rio de Janeiro State

Total and methyl mercury in different species of molluscs from two estuaries in Rio de Janeiro State

Opinion of the Scientific Panel on contaminants in the food chain [CONTAM] related to the safety assessment of wild and farmed fish

Biomagnification of mercury through the benthic food webs of a temperate estuary: Masan Bay, Korea

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