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Mercury and trace elements in crayfish from northern California

January 1, 2007

We collected two species of crayfish, Pacifastacus leniusculus and Procambarus clarkii, from Cache and Putah Creeks, California, and analyzed them for mercury and trace elements. Trace elements were higher in carcasses in 40 cases, higher in tails in 5 cases, and not different in 35 cases; no concentration exceeded levels considered harmful. Mercury concentrations were similar among sites, with no overall sex or species effect in tails. Mercury and methylmercury concentrations were higher in tails at all sites. Methylmercury concentrations in crayfish tails (0.156-0.256 ??g/g) exceeded concentrations reported in health advisories for consumption of fish and crayfish from these watersheds. ?? Springer Science+Business Media, LLC 2007.

Publication Year 2007
Title Mercury and trace elements in crayfish from northern California
DOI 10.1007/s00128-007-9304-6
Authors R. L. Hothem, D.R. Bergen, M.L. Bauer, J.J. Crayon, A.M. Meckstroth
Publication Type Article
Publication Subtype Journal Article
Series Title Bulletin of Environmental Contamination and Toxicology
Index ID 70031399
Record Source USGS Publications Warehouse
USGS Organization California Water Science Center