Temporal and spatial trends in contaminant concentrations were assessed in Lake Erie watersnakes, a threatened (USA)/endangered (Canada) species restricted to western Lake Erie. Temporal changes in plasma contaminant levels were determined in 1990 and 2003, and spatial patterns in 2003 at 12 sites, throughout the species' range. During this period, the watersnakes' diet changed from fish (75%) ...

The long-term time trends of atmospheric pollutants at eight Arctic monitoring stations are reported. work was conducted under the Monitoring and Assessment Programme (AMAP) Council. were: Alert, Canada; Zeppelin, Svalbard; Stórhöfði, Iceland; Pallas, Finland; Andøya, Norway; Villum Research Station, Greenland; Tiksi Amderma, Russia. Persistent organic (POPs) such as α - γ -hexachlorocyclohexan...

INTRODUCTION Prenatal exposure to some pesticides can adversely affect male reproductive health in animals. We investigated a possible human association between maternal exposure to 27 organochlorine compounds used as pesticides and cryptorchidism among male children. DESIGN Within a prospective birth cohort, we performed a case-control study; 62 milk samples from mothers of cryptorchid boys ...

From semipermeable membrane devices (SPMDs) placed in five Mississippi Delta streams in 1996 and 1997, the persistent organic pollutants (POPs) aldrin, chlordane, DCPA, DDT, dieldrin, endrin, heptachlor, mirex, nonachlor, and toxaphene were detected. In addition, the insecticides chlorpyriphos, endosulfan, and hexachlorocyclohexanes were detected. Two low-solubility herbicides not detected comm...

Empirical regression models were developed for estimating concentrations of dieldrin, total chlordane, and total DDT in whole fish from U.S. streams. Models were based on pesticide concentrations measured in whole fish at 648 stream sites nationwide (1992-2001) as part of the U.S. Geological Survey's National Water Quality Assessment Program. Explanatory variables included fish lipid content, e...

In low-income countries, the use of some organochlorine pesticides is still common in order to increase food production. Monitoring the chemical exposure is an important step in risk-reducing strategies. This is the first study to report concentrations of organochlorines in breast milk of women from Bangladesh where farming is the main income source. Organochlorines such as p,p'-DDT, o,p'-DDT, ...

Concentrations of achiral and chiral organochlorine contaminants (OCs), including hexachlorocyclohexane isomers (HCH), chlordane congeners (cis- and trans-chlordane, cis- and trans-nonachlor, MC5, MC7, and U82), and related metabolites (oxychlordane [OXY] and heptachlor exo-epoxide [HEPX]), were quantified in seawater (100 L; n = 6) and biota from the coastal Beaufort-Chukchi Seas food web near...

Although organochlorine pesticides (OCPs) have been banned for more than three decades, their concentrations only decreased gradually. This may be largely attributable to environmental persistence, illegal application, and exemption usage. study assessed the historic current regional context dichlorodiphenyltrichloroethane (DDT), chlordane, hexachlorobenzene (HCB), which were added Stockholm Co...

In 2004 this Anacostia River biomonitoring project used a two-week Asiatic clam (Corbicula fluminea) translocation bioaccumulation protocol in an attempt to find the contaminant source areas of its most highly contaminated first-order tributaries. These tributaries were identified from earlier studies as Lower Beaverdam Creek (PCBs), NorthEast Branch (total PAHs and chlordane) and Watts Branch ...