| Modeling of cadmium bioaccumulation in two populations of the green mussel Perna viridis. | |
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MedLine Citation:
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PMID: 16193759 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study attempted to quantify differences in Cd biokinetics from two populations of green mussels (Perna viridis) from two sites (eastern and western) in Hong Kong with contrasting hydrological conditions. Body Cd concentrations were modeled using a simple biokinetic model coupled with measurements of dissolved Cd concentrations at each site. Mussels collected from the western site had three to six times higher Cd tissue concentration than the eastern population collected during two seasons (summer wet and winter dry), but the salinity was only lower in the western site during the summer. More Cd was distributed in the metallothionein-like and heat-sensitive proteins in the western population than the eastern population, and Cd predominantly was distributed in the insoluble fraction during summer. The Cd uptake rate constant from the dissolved phase was higher in the western population during summer due to a much lower salinity, but was comparable during winter. Dietary uptake of Cd was similar in both populations, and assimilation was lower from ingested radiolabeled seston than from diatoms. Efflux of Cd remained comparable between the two populations from two seasons (0.02-0.03 /d). Kinetic modeling demonstrates that the faster influx of Cd from aqueous phase caused the higher body Cd concentrations in the western population. The predicted Cd concentrations in mussels were comparable to those observed in the field. Our study highlights differences in Cd accumulation kinetics in different populations of mussels likely caused by the different physical environments. |
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Authors:
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Tania Y T Ng; Wen-Xiong Wang |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Environmental toxicology and chemistry / SETAC Volume: 24 ISSN: 0730-7268 ISO Abbreviation: Environ. Toxicol. Chem. Publication Date: 2005 Sep |
Date Detail:
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Created Date: 2005-09-30 Completed Date: 2006-01-06 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 8308958 Medline TA: Environ Toxicol Chem Country: United States |
Other Details:
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Languages: eng Pagination: 2299-305 Citation Subset: IM |
Affiliation:
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Department of Biology, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Biomass Bivalvia Cadmium / chemistry, pharmacology* Ecology Environment Environmental Exposure Environmental Monitoring / methods* Hot Temperature Kinetics Models, Theoretical Perna Phylogeny Seasons Species Specificity Water / chemistry Water Pollutants, Chemical* |
| Chemical | |
Reg. No./Substance:
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0/Water Pollutants, Chemical; 7440-43-9/Cadmium; 7732-18-5/Water |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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