Role of dissolved and particulate cadmium in the accumulation of cadmium in cultured oysters ( Crassostrea gigas )

Role of dissolved and particulate cadmium in the accumulation of cadmium in cultured oysters (... Pacific oysters ( Crassostrea gigas ) collected on the coast of British Columbia, Canada have occasionally shown cadmium (Cd) concentrations at or above 2 μg g − 1 (wet weight), which has resulted in the loss of some international markets. This study investigated the source and transfer of Cd to oysters by focusing on the role of dissolved and particulate Cd in seawater. Parameters monitored for 1 year at two oyster farm sites on Vancouver Island included: oyster tissue mass and shell length, Cd in oysters, dissolved Cd, particulate Cd, temperature and salinity. Results show that dissolved Cd was the main source of Cd to the oysters and that Cd was mainly concentrated in the gut tissues. A seasonal trend was observed in Cd in oysters, in which levels were lowest during periods of higher temperatures. Results also indicate that the local oceanographic inputs and sediment diagenesis directly affect dissolved Cd and thereby influence the Cd levels in oysters. Particulate matter was not found to be a source of Cd in oysters, and was actually negatively correlated. This was likely due to the uptake of dissolved Cd by phytoplankton and the effect of phytoplankton on oyster tissue mass. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Science of the Total Environment Elsevier

Role of dissolved and particulate cadmium in the accumulation of cadmium in cultured oysters ( Crassostrea gigas )

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Publisher
Elsevier
Copyright
Copyright © 2007 Elsevier B.V.
ISSN
0048-9697
eISSN
1879-1026
D.O.I.
10.1016/j.scitotenv.2007.12.004
Publisher site
See Article on Publisher Site

Abstract

Pacific oysters ( Crassostrea gigas ) collected on the coast of British Columbia, Canada have occasionally shown cadmium (Cd) concentrations at or above 2 μg g − 1 (wet weight), which has resulted in the loss of some international markets. This study investigated the source and transfer of Cd to oysters by focusing on the role of dissolved and particulate Cd in seawater. Parameters monitored for 1 year at two oyster farm sites on Vancouver Island included: oyster tissue mass and shell length, Cd in oysters, dissolved Cd, particulate Cd, temperature and salinity. Results show that dissolved Cd was the main source of Cd to the oysters and that Cd was mainly concentrated in the gut tissues. A seasonal trend was observed in Cd in oysters, in which levels were lowest during periods of higher temperatures. Results also indicate that the local oceanographic inputs and sediment diagenesis directly affect dissolved Cd and thereby influence the Cd levels in oysters. Particulate matter was not found to be a source of Cd in oysters, and was actually negatively correlated. This was likely due to the uptake of dissolved Cd by phytoplankton and the effect of phytoplankton on oyster tissue mass.

Journal

Science of the Total EnvironmentElsevier

Published: Apr 15, 2008

References

  • Application of a kinetic model to demonstrate how selective feeding could alter the amount of cadmium accumulated by the blue mussel ( Mytilus trossolus )
    Bendell-Young, L.; Arifin, Z.
  • The elemental composition of some marine phytoplankton
    Ho, T.-Y.; Quigg, A.; Finkel, Z.; Milligan, A.; Wyman, K.; Falkowski, P.
  • Natural Cd and Pb variations in Mytilus californianus during the upwelling season
    Lares, M.L.; Orians, K.J.
  • Scavenged excess aluminum and its relationship to bulk titanium in biogenic sediment from the central equatorial Pacific Ocean
    Murray, R.W.; Leinen, M.
  • Effects of cadmium toxicity on growth and elemental composition of marine phytoplankton
    Payne, C.D.; Price, N.M.
  • Assimilation efficiencies and turnover rates of trace elements in marine bivalves: a comparison of oysters, clams and mussels
    Reinfelder, J.R.; Wang, W.X.; Luoma, S.N.; Fisher, N.S.
  • Distributions of dissolved titanium in Chesapeake Bay and the Amazon River Estuary
    Skrabal, S.A.
  • Processes regulating cellular metal accumulation and physiological effects: phytoplankton as model systems
    Sunda, W.G.; Huntsman, S.A.

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