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blood lead concentrations in waterfowl utilizing lake coeur d'alene, idaho.the coeur d'alene river basin, lake coeur d'alene, and the spokane river contain elevated heavy metal concentrations in sediment and water from historical mining and ore processing operations in the coeur d'alene basin. lead poisoning has been identified as the cause of death in hundreds of waterfowl utilizing wetlands in the floodplain of the coeur d'alene river, but little was known about hazards to waterfowl from heavy metal contamination in shallow bays and wetlands of lake coeur d'alene. we ...200717082999
developmental toxicity of lead-contaminated sediment to mallard ducklings.sediment ingestion has been identified as an important exposure route for toxicants in waterfowl. the toxicity of lead-contaminated sediment from the coeur d'alene river basin (cdarb) in idaho was examined on posthatching development of mallard (anas platyrhynchos) ducklings for 6 weeks. day-old ducklings received either untreated control diet, clean sediment (24%) supplemented control diet, cdarb sediment (3,449 microg/g lead) supplemented diets at 12% or 24%, or a positive control diet contain ...200010871425
field evaluation of lead effects on canada geese and mallards in the coeur d'alene river basin, idaho.hatch year (hy) mallards (anas platyrhynchos) in the coeur d'alene (cda) river basin had higher concentrations of lead in their blood than hy western canada geese (branta canadensis moffitti) (geometric means 0.98 versus 0.28 microg/g, wet weight). the pattern for adults of both species was similar, although geometric means (1.77 versus 0. 41 microg/g) were higher than in hy birds. hy mallards captured in the cda river basin in 1987 contained significantly lower lead concentrations in their bloo ...200010790508
biological elimination rates of radioisotopes by mallards contaminated at a liquid radioactive waste disposal area.the biological elimination of nine gamma-emitting radioisotopes was studied in mallards (anas platyrhynchos) which were released onto liquid radioactive waste pounds in southeastern idaho. after 68, 75 or 145 days, the ducks were removed from the contaminated environment and placed in metabolic cages. whole-body and feces-urine counts were made for 51 days and then the ducks were sacrificed and dissected for tissue analyses. the biological elimination of radioisotopes were fit to two compartment ...19836885480
plutonium, am, cm and sr in ducks maintained on radioactive leaching ponds in southeastern idaho.concentrations of 90sr, 238pu, 239,240pu, 241am, 242cm and 244cm were determined in tissues of mallard ducks (anas platyrhynchos) maintained for 43-145 d on radioactive leaching ponds in southeastern idaho. highest concentrations of transuranics occurred in the gastrointestinal tract, followed closely by feathers. approximately 75%, 18%, 6% and 1% of the total transuranic activity in tissues analyzed were associated with the bone, feathers, gi tract and liver, respectively. concentrations in gi ...19883170205
phosphorus amendment reduces bioavailability of lead to mallards ingesting contaminated sediments.lead poisoning of waterfowl has been reported for decades in the coeur d'alene river basin in idaho as a result of the ingestion of lead-contaminated sediments. we conducted a study to determine whether the addition of phosphoric acid to sediments would reduce the bioavailability of lead to mallards (anas platyrhynchos). when sediments were amended with 1% phosphorus under laboratory conditions, and diets containing 12% amended sediment were fed to mallards, reductions in tissue lead were 43% in ...200415253052
iodine-129 in waterfowl muscle from a radioactive leaching pond complex in southeastern idaho.waterfowl were collected at radioactive leaching ponds, an adjacent sewage lagoon on the idaho national engineering laboratory ( inel ) and on nearby control areas to determine 129i / 127i (stable isotope) atom ratios in muscle tissue. iodine-129/127 atom ratios in muscle tissue averaged about 1.6 x 10(-6) for wild waterfowl from the leaching pond, 1.6 x 10(-6) for waterfowl from the sewage pond, and 1.3 x 10(-6) for control samples. a group of wing-clipped waterfowl placed on the ponds for 2-15 ...19846724936
toxicity of lead-contaminated sediment to mallards.because consumption of lead-contaminated sediment has been suspected as the cause of waterfowl mortality in the coeur d'alene river basin in idaho, we studied the bioavailability and toxicity of this sediment to mallards (anas platyrhynchos). in experiment 1, one of 10 adult male mallards died when fed a pelleted commercial duck diet that contained 24% lead-contaminated sediment (with 3,400 microgram/g lead in the sediment). protoporphyrin levels in the blood increased as the percentage of lead- ...199910047601
effects of lead-contaminated sediment and nutrition on mallard duckling behavior and growth.sediment ingestion has become a recognized exposure route for toxicants in waterfowl. the effects of lead-contaminated sediment from the coeur d'alene river basin (cdarb) in idaho were evaluated on mallard (anas platyryhnchos) duckling behavior and growth over a 5-wk period using time-activity budgets. day-old ducklings received either a clean sediment (24%) supplemented control diet, cdarb sediment (3449 microg/g lead) supplemented diets at 12% or 24%, or a positive control diet (24% clean sedi ...200515762550
phosphorus amendment reduces hematological effects of lead in mallards ingesting contaminated sediments.lead poisoning of waterfowl has been reported for decades in the coeur d'alene river basin (cdarb) in idaho as a result of the ingestion of lead-contaminated sediments. this study was conducted to determine whether the addition of phosphoric acid to sediments would reduce the bioavailability and toxicity of lead to mallards (anas platyrhynchos) as related to adverse hematological effects and altered plasma chemistries. mallards received diets containing 12% clean sediment (controls) or 12% sedim ...200616446990
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