Heavy Metals in the Bivalve Anadara ( Senilia ) senilis from Nigeria

Joiris, Claude R.; Azokwu, Maureen I.

doi:10.1016/s0025-326x(99)00069-7

Cited by 26 publications

(13 citation statements)

References 14 publications

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“…The four essential metals which were studied, were present in similar respective concentrations to those found for other bivalves elsewhere and exhibited similar seasonal pattern in terms of their concentrations although of different magnitudes (Boyden and Phillips, 1981;Reinfelder et al, 1997;Joiris and Azokwu, 1999). There was no influence of season and location on Mn and Cu concentrations, but location played an important role in Fe and Zn concentrations while season exhibited a moderate influence.…”

Section: Resultssupporting

confidence: 62%

Heavy metals concentrations and burden in the bivalves (Anadara (Senilia) senilis, Crassostrea tulipa and Perna perna) from lagoons in Ghana: Model to describe mechanism of accumulation/excretion

Otchere¹

2003

Afr. J. Biotechnol.

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Seasonal sampling of the bivalves: Anadara (Senilia) senilis (n = 260), Crassostrea tulipa (n = 220), from two 'open' lagoons (Benya and Ningo) and a 'closed' lagoon (Sakumo), and Perna perna (n = 170), from rocky shores adjacent to Benya and Sakumo, were analyzed for their total Cu, Zn, Fe, Mn, Cd and Hg concentrations and total body burden (that is concentration multiply by total flesh weight). Median concentrations for cockles were: 5, 38, 710, 10, 0.22 and 0.20 µg/g dw respectively. Cd and Hg levels in dry season samples were higher than those in wet season. While Zn and Fe dry season levels were lower than wet season with no variation in Cu and Mn. Median total body burden in cockles were: 3.3, 30.5, 370, 5.2, 0.28 and 0.13 µg respectively. Geographical variations observed were mostly due to size distribution rather than the ecological differences between stations. Log-transformed regression relationships between body burden and size were used to compare the species. Relationship between condition index, body burden and concentration were used to develop a model to describe mechanism of accumulation/excretion.

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Section: Resultssupporting

confidence: 62%

Heavy metals concentrations and burden in the bivalves (Anadara (Senilia) senilis, Crassostrea tulipa and Perna perna) from lagoons in Ghana: Model to describe mechanism of accumulation/excretion

Otchere¹

2003

Afr. J. Biotechnol.

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“…Boyden [18] reported similar size-concentration relationships for Cu, Zn, and Pb in the limpet Patella vulgate collected from Portishead, Severn Estuary. Joiris and Azokwu [20] observed the same results with Cd and Pb in the West African bloody cockle Anadara (Senilia) selinis collected from Bonny River estuary in the Niger Delta area of Nigeria. In a previous study of hard clams from Vietnam [8], we also found an inverse relationship of decreasing Table 1 Fig.…”

Section: Trace Element Concentrations In Blood Cocklesupporting

confidence: 62%

“…In several studies, trends of decreasing trace element concentrations with increasing shell length have been reported and were attributed primarily to increased metabolic rates in smaller organisms, which corresponded to a so-called growth dilution effect [8,[18][19][20][21]. Boyden [18] reported similar size-concentration relationships for Cu, Zn, and Pb in the limpet Patella vulgate collected from Portishead, Severn Estuary.…”

Section: Trace Element Concentrations In Blood Cocklementioning

confidence: 95%

Trace elements in Anadara spp. (Mollusca: Bivalva) collected along the coast of Vietnam, with emphasis on regional differences and human health risk assessment

et al. 2011

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This study measured concentrations of 21 trace elements in whole soft tissue of the blood cockle Anadara spp., which is a common food for local people, collected along the coast of Vietnam. Results showed that concentrations of As, Sr, Mo, Sn, and Pb in cockles collected from Khanh Hoa Province in the Central Coastal Zone (CCZ) had higher values than those from the other regions, while cockles collected from the Mekong River Delta (MRD) showed the highest concentrations of Hg. Regional differences in trace element concentrations of the cockle may be due to differences in human activities, i.e., shipyards in the CCZ and agriculture in the MRD. Trace element concentrations measured in the soft tissues of blood cockles investigated here were within safe levels for human consumption following criteria by the European Commission (EC) and the United States Food and Drug Agency, but several specimens had Cd levels exceeding the EC guidelines of 1 lg/g wet weight. The estimated target hazard quotients for trace elements via consuming bivalves were \1, indicating that the cumulative noncarcinogenic risk was completely insignificant. However, the estimated target cancer risk values by assumed inorganic As concentrations seem to implicate consumption of these cockles as posing potential human health concerns.

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“…Boyden [22] and Phillips [23] have reported that trace element concentrations of most molluscs are related to their size. Trends of decreasing trace element concentration with increasing body weight or length have also been found, and were primarily attributed to higher metabolic rates in smaller organisms [24][25][26].…”

Section: Regional Differences In Trace Element Concentrationsmentioning

confidence: 86%

Concentrations of trace elements in Meretrix spp. (Mollusca: Bivalva) along the coasts of Vietnam

et al. 2010

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The dominant coastal bivalve in Vietnam, hard clams Meretrix spp., collected from the South Key Economic Zone (SKEZ), the Mekong River Delta, and the Central Coastal Zone (CCZ) were analyzed for 21 trace elements. Comparison of the results from the three regions indicated that levels of most of the trace elements, especially As, Mo, Sn, and Pb, were highest in the samples collected from the CCZ, whereas most of the trace elements were found to be present at relatively low levels in samples from the SKEZ. The high concentrations of these trace elements in the CCZ, a sparsely populated region with less human activity than the other two regions, were believed to have originated from industrial waste produced in a shipyard. Although the trace element concentrations in the bivalves were within safe levels for human-consumption criteria reported by the United State Food and Drug Administration and the European Commission, estimation of cancer risk based on As concentration indicates that the hard clams from the CCZ pose a high risk to consumers.Thus, the industrial waste produced in the less densely populated region might increase the health risk to consumers via the contamination of bivalves commonly used as food.

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Heavy Metals in the Bivalve Anadara ( Senilia ) senilis from Nigeria

Cited by 26 publications

References 14 publications

Heavy metals concentrations and burden in the bivalves (Anadara (Senilia) senilis, Crassostrea tulipa and Perna perna) from lagoons in Ghana: Model to describe mechanism of accumulation/excretion

Heavy metals concentrations and burden in the bivalves (Anadara (Senilia) senilis, Crassostrea tulipa and Perna perna) from lagoons in Ghana: Model to describe mechanism of accumulation/excretion

Trace elements in Anadara spp. (Mollusca: Bivalva) collected along the coast of Vietnam, with emphasis on regional differences and human health risk assessment

Concentrations of trace elements in Meretrix spp. (Mollusca: Bivalva) along the coasts of Vietnam

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