| mercury exposure and neurochemical impacts in bald eagles across several great lakes states. | in this study, we assessed mercury (hg) exposure in several tissues (brain, liver, and breast and primary feathers) in bald eagles (haliaeetus leucocephalus) collected from across five great lakes states (iowa, michigan, minnesota, ohio, and wisconsin) between 2002-2010, and assessed relationships between brain hg and neurochemical receptors (nmda and gaba(a)) and enzymes (glutamine synthetase (gs) and glutamic acid decarboxylase (gad)). brain total hg (thg) levels (dry weight basis) averaged 2. ... | 2011 | 21735125 |
| productivity, embryo and eggshell characteristics, and contaminants in bald eagles from the great lakes, usa, 1986 to 2000. | chlorinated hydrocarbon concentrations in eggs of fish-eating birds from contaminated environments such as the great lakes of north america tend to be highly intercorrelated, making it difficult to elucidate mechanisms causing reproductive impairment, and to ascribe cause to specific chemicals. an information- theoretic approach was used on data from 197 salvaged bald eagle (haliaeetus leucocephalus) eggs (159 clutches) that failed to hatch in michigan and ohio, usa (1986-2000). contaminant leve ... | 2010 | 20821609 |
| in vivo and in vitro neurochemical-based assessments of wastewater effluents from the maumee river area of concern. | wastewater treatment plant (wwtp) effluents contain potentially neuroactive chemicals though few methods are available to screen for the presence of such agents. here, two parallel approaches (in vivo and in vitro) were used to assess wwtp exposure-related changes to neurochemistry. first, fathead minnows (fhm, pimephales promelas) were caged for four days along a wwtp discharge zone into the maumee river (ohio, usa). grab water samples were collected and extracts obtained for the detection of a ... | 2016 | 26736051 |
| polychlorinated biphenyl concentrations, congener profiles, and ratios in the fat tissue, eggs, and plasma of snapping turtles (chelydra s. serpentina) from the ohio basin of lake erie, usa. | concentrations and profiles of polychlorinated biphenyls (pcbs) were determined in three tissues of adult snapping turtles (chelydra serpentina serpentina) from six locations in the ohio basin of lake erie to characterize tissue variation and geographic trends. the locations included the ohio areas of concern, i.e., the ashtabula, black, and maumee rivers; the ottawa river near toledo; and two reference sites. mean total pcbs were greatest in turtles from the ottawa river followed by the maumee, ... | 2006 | 16583258 |