Christopher J Schmitt

Organochlorine chemicals in northern cardinal eggs from suburban Washington, DC USA

Analysis of organochlorine pesticides and polychlorinated biphenyls (PCBs) in northern cardinal eggs from six neighborhoods near Washington, DC

Tags: Arlington, Dunkirk, Environmental Health, Greenbelt, Maryland, All tags... Organochlorine pesticides, Takoma Park, USGS Science Data Catalog (SDC), Virginia, West Friendship, biota, birds, chlordane, industrial pollution, Fewer tags

Organochlorine residues and elemental contaminants in U.S. freshwater fish, 1976-1986: National Contaminant Biomonitoring Program

The National Contaminant Biomonitoring Program (NCBP), which was developed and maintained by the U.S. Fish and Wildlife Service (FWS), monitored concentrations of environmental contaminants in freshwater fish over a period of about 20 years. Beginning in the 1960s as a component of the multi-agency National Pesticide Monitoring Program (NPMP) and continuing through the mid-1980s, freshwater fish were periodically collected from a national network of stations for analysis of pesticides, PCBs, and other contaminants. The NPMP/NCBP database of contaminant concentrations is the most extensive of its kind, unique in its breadth and depth with respect to environmental contaminant concentrations in fish. The data and information...

Tags: NAWQA, NCBP, Organochlorine insecticides, PCBs, Polychlorinated biphenyls, All tags... USGS Science Data Catalog (SDC), United States, biomonitoring, biota, contaminants, environmental contaminants, environmental monitoring, environmental risk assessment, pesticides, river, river basins, streams, Fewer tags

Lead (Pb) and calcium (Ca) concentrations were measured in fillet samples of longear sunfish (Lepomis megalotis) and suckers (Catostomidae) collected in 2005‒12 from the Big River, which drains a historical mining area in southeastern Missouri, where a consumption advisory is in effect due to elevated Pb concentrations in fish. Regression analysis indicated that fillet Ca explained 75‒>99% of fillet Pb variation in mining-affected stream reaches. We used analysis-of-covariance to standardize Pb concentration to a common Ca concentration (415 ug/g wet weight), which reduced differences between taxa. Variation among sites and years also was reduced after Ca-normalization, as was the number of samples that exceeded...

Categories: Data; Types: Citation; Tags: Big River, Calcium, Flat River, Lead, Longear Sunfish, All tags... Meramec River, Mining, Missouri, Redhorse sucker, Southeast Missouri Mining District, Fewer tags