chemical contaminants, health indicators, and reproductive biomarker responses in fish from the colorado river and its tributaries.common carp (cyprinus carpio), black bass (micropterus spp.), and channel catfish (ictalurus punctatus) were collected from 14 sites in the colorado river basin (crb) to document spatial trends in accumulative contaminants, health indicators, and reproductive biomarkers. organochlorine residues, 2,3,7,8-tetrachlorodibenzo-p-dioxin-like activity (tcdd-eq), and elemental contaminants were measured in composite samples of whole fish, grouped by species and gender, from each site. selenium (se) and ...200717418376
prediction of fish and sediment mercury in streams using landscape variables and historical mining.widespread mercury (hg) contamination of aquatic systems in the sierra nevada of california, u.s., is associated with historical use to enhance gold (au) recovery by amalgamation. in areas affected by historical au mining operations, including the western slope of the sierra nevada and downstream areas in northern california, such as san francisco bay and the sacramento river-san joaquin river delta, microbial conversion of hg to methylmercury (mehg) leads to bioaccumulation of mehg in food webs ...201627378154
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