Document Detail


Persistent organic pollutants in outmigrant juvenile chinook salmon from the Lower Columbia Estuary, USA.
MedLine Citation:
PMID:  17306864     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Although chemical contaminants are recognized as a potential factor contributing to the salmon declines in the Pacific Northwest, United States, information on contaminant concentrations in threatened and endangered salmon from the Columbia Estuary is limited. In this study we monitored exposure to several persistent organic pollutants [polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethanes (DDTs) and other organochlorine pesticides] in outmigrant juvenile fall chinook salmon (Oncorhynchus tschawytscha) in the Lower Columbia River, and evaluated the potential for adverse effects on salmon and the estuarine food web. Contaminants were measured in whole bodies and stomach contents of subyearling to yearling chinook collected in 2001 and 2002 from sites near the confluence of the Columbia and Willamette Rivers, Longview, and within the lower Estuary. The contaminants detected at highest concentrations in salmon whole bodies were PCBs and DDTs. Average concentrations of PCBs in salmon from the sampling sites ranged from 1300 to 14,000 ng/g lipid, in some cases exceeding the recently estimated threshold for adverse health effects in juvenile salmonids of 2400 ng/g lipid. Average DDT concentrations ranged from 1800 to 27,000 ng/g lipid. These levels are among the highest measured in juvenile salmon from Pacific Northwest estuaries to date. Concentrations of PCBs and DDTs in salmon whole bodies showed no clear spatial gradient from the Willamette/Columbia Confluence to the mouth of the Columbia, but tended to be higher in larger fish and older fish, suggesting a correlation with estuarine residence time. PCBs, DDTs, and PAHs were all found in salmon stomach contents, indicating that prey is a source of exposure. Hatchery feed may have contributed to contaminant body burdens in those fish that were of hatchery origin. Contaminant body burdens in salmon were poorly correlated with contaminant concentrations previously measured in local bed sediments, suggesting that pelagic as well as benthic sources are important in determining salmon exposure.
Authors:
Lyndal L Johnson; Gina M Ylitalo; Catherine A Sloan; Bernadita F Anulacion; Anna N Kagley; Mary R Arkoosh; Tricia A Lundrigan; Kim Larson; Mark Siipola; Tracy K Collier
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2007-02-15
Journal Detail:
Title:  The Science of the total environment     Volume:  374     ISSN:  0048-9697     ISO Abbreviation:  Sci. Total Environ.     Publication Date:  2007 Mar 
Date Detail:
Created Date:  2007-03-02     Completed Date:  2007-05-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0330500     Medline TA:  Sci Total Environ     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  342-66     Citation Subset:  IM    
Affiliation:
Northwest Fisheries Science Center, Environmental Conservation Division, National Marine Fisheries Service, NOAA, 2725 Montlake Blvd E, Seattle, WA 98112, United States. Lyndal.L.Johnson@noaa.gov
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MeSH Terms
Descriptor/Qualifier:
Animals
Environmental Monitoring
Gastrointestinal Contents / chemistry
Hydrocarbons, Chlorinated / analysis*,  metabolism
Pesticides / analysis*,  metabolism
Polycyclic Hydrocarbons, Aromatic / analysis*,  metabolism
Rivers
Salmon / metabolism*
United States
Water Pollutants, Chemical / analysis*,  metabolism
Chemical
Reg. No./Substance:
0/Hydrocarbons, Chlorinated; 0/Pesticides; 0/Polycyclic Hydrocarbons, Aromatic; 0/Water Pollutants, Chemical

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


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