Record Display for the EPA National Library Catalog


Main Title Mercury Bioaccumulation in Fish in a Region Affected by Historic Gold Mining: The South Yuba River, Deer Creek, and Bear River Watersheds, California, 1999.
Author May, J. T. ; Hothem, R. L. ; Alpers, C. N. ; Law, M. A. ;
CORP Author Geological Survey, Sacramento, CA. Water Resources Div. ;Bureau of Land Management, Washington, DC. ;Forest Service, Washington, DC. ;Environmental Protection Agency, Washington, DC. ;California State Water Resources Control Board, Sacramento.
Publisher 2000
Year Published 2000
Report Number USGS/OFR-00-367;
Stock Number PB2002-103361
Additional Subjects Mercury(Metal) ; Water pollution ; California ; Sampling ; Gold mining ; Methylmercury ; Watersheds ; Water quality ; Deer Creek ; Bear River ; South Yuba River
Library Call Number Additional Info Location Last
NTIS  PB2002-103361 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation CD-ROM
Mercury that was used historically for gold recovery in mining areas of the Sierra Nevada continues to enter local and downstream water bodies, including the Sacramento San Joaquin Delta and the San Francisco Bay of northern California. Methylmercury is of particular concern because it is the most prevalent form of mercury in fish and is a potent neurotoxin that bioaccumulates at successive trophic levels within food webs. Fish were collected from 5 reservoirs and 14 stream sites during August through October 1999 to assess the distribution of mercury in these watersheds. Fish that were collected from reservoirs included top trophic level predators (black basses, Micropterus spp.), intermediate trophic level predators (sunfish (blue gill, Lepomis macrochirus green sunfish, Lepomis cyanellus ; and black crappie, Poxomis nigromaculatus )), and recovery in mining areas of the Sierra Nevada benthic omnivores (channel catfish, Ictularus punctatus ).