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Corpus Systématique Animale

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Accumulation of organic contaminants in two sediment-dwelling shellfish with contrasting feeding modes: Deposit- (Macomona liliana) and filter-feeding (Austrovenus stutchburyi)

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  • C. W. Hickey 1
  • D. S. Roper 1
  • P. T. Holland 2
  • T. M. Trower 2
  • 1) National Institute of Water and Atmosphere Research Ltd, NIWA, PO Box 11-115, Hamilton, New Zealand
  • 2) Horticulture and Food Research Institute of New Zealand, Ruakura Research Centre, Hamilton, New Zealand

Bioaccumulation of four classes of contaminants (organochlorine pesticides, polychlorinated biphenyls (PCB), polynuclear aromatic hydrocarbons (PAH), and chlorophenols) was determined in two sediment-dwelling bivalves, the tellinid Macomona liliana and the venerid Austrovenus stutchburyi at five stations along a contaminant gradient in Manukau Harbour, New Zealand. The species were chosen because they provide contrasting exposure pathways for contaminant uptake: A. stutchburyi is a filter-feeder and M. liliana is a deposit-feeder. They are also important components of the estuarine ecosystem, and A. stutchburyi are used for food. Both shellfish showed marked gradients of contaminant concentrations from the inner-harbour to the entrance. Concentrations of contaminants were similar in the two species, with generally slightly higher PCB and PAH levels in M. liliana. On a dry tissue weight basis, the PAHs were the major contaminant class, with the highest concentration measured (203 ng/g DW). Mean bioaccumulation factors (BAF) were similar for the two species, with mean values in the range 20–30 for most contaminants with the exception of PAHs, which were less than 1. Mean accumulation factor (AF) values, the lipid normalized concentration in organisms divided by the organic carbon normalized sediment concentration, were mostly in the range 1–4, except for PAHs, which were 0.002 and 0.14. M. liliana showed significantly higher accumulation ratios than A. stutchburyi. The abundance and condition of M. liliana was reduced at the more contaminated sites. These results suggest that M. liliana are sensitive indicators of contaminant stress and may be usefully incorporated into chemical contaminant and biological effects monitoring programs.

Catégories Science-Metrix
  • 1 - health sciences
  • 2 - biomedical research
  • 3 - toxicology
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  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Health, Toxicology and Mutagenesis
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Pollution
  • 1 - Life Sciences ; 2 - Pharmacology, Toxicology and Pharmaceutics ; 3 - Toxicology
  • 1 - Health Sciences ; 2 - Medicine ; 3 - General Medicine
Catégories WoS
  • 1 - science ; 2 - toxicology
  • 1 - science ; 2 - environmental sciences
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Archives of Environmental Contamination and Toxicology

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