Document Detail


Cadmium bioaccumulation and retention kinetics in the Chilean blue mussel Mytilus chilensis: seawater and food exposure pathways.
MedLine Citation:
PMID:  20638735     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The Chilean blue mussel (Mytilus chilensis, Hupe 1854) represents the most important bivalve exploited along the Chilean coast and is a major food source for the Chilean population. Unfortunately, local fish and shellfish farming face severe problems as a result of bioaccumulation of toxic trace metals into shellfishes. Blue mussels collected along the Chilean coasts contain levels of Cd above the regulatory limits for human consumption. In this study, we examined the bioaccumulation, depuration and organ distribution of Cd in the M. chilensis, from 109Cd-labelled bulk seawater and from feeding with 109Cd-labelled algae. The uptake of 109Cd via seawater displayed a simple exponential kinetic model suggesting that cadmium activity tends to reach an equilibrium value of 1.838+/-0.175 ng g(-1) (mean+/-asymptotic standard error, p < 0.001) after 78+/-9 days. The depuration rate for 109Cd accumulated via seawater was slow, with only 21% of the total 109Cd accumulated in the whole mussel being eliminated after 52 days. Total elimination of Cd in mussels was adequately described by a double component kinetic model, in which the biological half-life for the long-lived component represents more than 6 months. In contrast, depuration after radiolabelled food uptake was fast, reaching only 20% of retention in 10 days. This knowledge of the long half-life of cadmium accumulated via seawater as well as the non-negligible level of cadmium accumulated into the shells is relevant to the management of Cd levels in this species and the refinement of detoxification processes in order to comply with authorized Cd levels.
Authors:
Pedro Hervé-Fernández; Fanny Houlbrèque; Florence Boisson; Sandor Mulsow; Jean-Louis Teyssié; François Oberhaënsli; Sabine Azemard; Ross Jeffree
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-06-25
Journal Detail:
Title:  Aquatic toxicology (Amsterdam, Netherlands)     Volume:  99     ISSN:  1879-1514     ISO Abbreviation:  Aquat. Toxicol.     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-08-20     Completed Date:  2010-12-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8500246     Medline TA:  Aquat Toxicol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  448-56     Citation Subset:  IM    
Copyright Information:
2010 Elsevier B.V. All rights reserved.
Affiliation:
Instituto de Geociencias, Universidad Austral de Chile, Castilla 567, Valdivia, Chile.
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MeSH Terms
Descriptor/Qualifier:
Animals
Cadmium Radioisotopes / analysis,  pharmacokinetics*
Chile
Fisheries / standards*
Kinetics
Models, Biological
Mytilus / metabolism*
Seawater / chemistry*
Water Pollutants, Chemical / analysis,  pharmacokinetics*
Chemical
Reg. No./Substance:
0/Cadmium Radioisotopes; 0/Water Pollutants, Chemical

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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