Document Detail

Methylmercury concentrations in fish from tidal waters of the Chesapeake bay.
MedLine Citation:
PMID:  16788747     Owner:  NLM     Status:  MEDLINE    
Striped bass (Morone saxatilis), white perch (Morone Americana), and largemouth bass (Micropterus salmoides) were collected in the Chesapeake Bay mainstem and tributaries and analyzed for total mercury (Hg) and methylmercury (MeHg) content. Striped bass are anadromous, whereas white perch and largemouth bass are resident species, and the largemouth bass are also restricted to the tidal fresh portion of the Bay. Total Hg and MeHg concentrations in striped bass increased with fish size, and large fish (>7.5 kg wet weight) tended to have MeHg concentrations of 300 ng g(-1) or greater. On average, the striped bass MeHg concentration was 120 +/- 100 ng g(-1) and the fraction of the total Hg as MeHg was 65 +/- 22%. Reasons for the lower relative MeHg content are discussed. Otolith strontium/calcium ratios were also determined to examine whether migration had a significant impact on MeHg content in striped bass. Resident fish did appear to have a higher MeHg burden than the more migratory fish of similar size. Largemouth bass and white perch tended to have low MeHg content (respectively, 14 +/- 7 and 13 +/- 11 ng g(-1); all fish <1 kg wet weight), and the white perch also had a low %MeHg (28 +/- 14%), reflecting their mostly planktivorous lifestyle. A comparison of largemouth bass and striped bass MeHg concentrations for the estuarine fish with those of fish in Maryland reservoirs of similar size showed that the estuarine fish have much lower MeHg burdens. Differences in MeHg concentration in the estuarine waters compared to the reservoir waters likely account for much of this difference, although the importance of other factors is also discussed.
Robert P Mason; Deborah Heyes; Auja Sveinsdottir
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Publication Detail:
Type:  Journal Article     Date:  2006-06-20
Journal Detail:
Title:  Archives of environmental contamination and toxicology     Volume:  51     ISSN:  0090-4341     ISO Abbreviation:  Arch. Environ. Contam. Toxicol.     Publication Date:  2006 Oct 
Date Detail:
Created Date:  2006-08-28     Completed Date:  2006-09-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0357245     Medline TA:  Arch Environ Contam Toxicol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  425-37     Citation Subset:  IM    
Chesapeake Biological Laboratory, University of Maryland Center for Environmental Science, One Williams Street, P.O. Box 38, Solomons, Maryland 20688, USA.
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MeSH Terms
Environmental Monitoring*
Methylmercury Compounds / analysis*,  pharmacokinetics
Muscle, Skeletal / chemistry,  metabolism
Perciformes / metabolism*
Seawater / analysis*
Water Pollutants, Chemical / analysis*,  pharmacokinetics
Reg. No./Substance:
0/Methylmercury Compounds; 0/Water Pollutants, Chemical

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

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