Document Detail

Mytilus californianus as an indicator of heavy metals on the northwest coast of Baja California, Mexico.
MedLine Citation:
PMID:  11443995     Owner:  NLM     Status:  MEDLINE    
Samples of Mytilus californianus were analyzed to determine the spatial and temporal distribution of Ag, Al, Cd, Cr, Cu, Mn, Pb and Zn concentrations on the northwest coast of Baja California and to compare the results with levels reported for California, USA. The samples were collected at eight sites from the US-Mexican border to San Quintín, BC (300 km south of the border) in February and July 1982 and 1994. During both years, north-south gradients in the concentration of Ag and Pb were observed, with the highest values close to the US-Mexican border (Ag = 0.60-1.54 and Pb = 0.21-2.89 micrograms g-1) and the lowest in the southern part of the study area (Ag = 0.05-0.10 and Pb = not detectable-0.03 microgram g-1). The Ag and Pb gradients suggest that their distributions are affected by anthropogenic activities close to the US-Mexican border. South-north gradients in the concentration of Cd (minimum = 0.59-2.16 and maximum = 2.61-12.93 micrograms g-1), for both 1982 and 1994, were observed. The geographic annual means of Pb for California (average of six stations along the entire state) were significantly higher than those of this study (average of the eight sampling sites) in 1982 and 1994. Cu in California was significantly greater than that of this study only in 1994. Cluster analyses on all metals indicate three similar geographic zones in 1982 and 1994, suggesting a relative consistency in the processes that determine the spatial variability of the concentration of some metals in M. californianus on the northwest coast of Baja California.
A Muñoz-Barbosa; E A Gutiérrez-Galindo; G Flores-Muñoz
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Marine environmental research     Volume:  49     ISSN:  0141-1136     ISO Abbreviation:  Mar. Environ. Res.     Publication Date:  2000 Mar 
Date Detail:
Created Date:  2001-07-10     Completed Date:  2001-08-16     Revised Date:  2005-11-17    
Medline Journal Info:
Nlm Unique ID:  9882895     Medline TA:  Mar Environ Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  123-44     Citation Subset:  IM    
Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas, PO Box 2516, Ensenada, Baja California, Mexico.
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MeSH Terms
Aluminum / analysis
Bivalvia / chemistry*
Cadmium / analysis
Chromium / analysis
Copper / analysis
Lead / analysis
Metals, Heavy / analysis*
Silver / analysis
Zinc / analysis
Reg. No./Substance:
0/Metals, Heavy; 7429-90-5/Aluminum; 7439-92-1/Lead; 7440-22-4/Silver; 7440-43-9/Cadmium; 7440-47-3/Chromium; 7440-50-8/Copper; 7440-66-6/Zinc

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