| bioassays with caged hyalella azteca to determine in situ toxicity downstream of two saskatchewan, canada, uranium operations. | the main objectives of this in situ study were to evaluate the usefulness of an in situ bioassay to determine if downstream water bodies at the key lake and rabbit lake uranium operations (saskatchewan, canada) were toxic to hyalella azteca and, if toxicity was observed, to differentiate between the contribution of surface water and sediment contamination to in situ toxicity. these objectives were achieved by performing 4-d in situ bioassays with laboratory-reared h. azteca confined in specially ... | 2007 | 17941726 |
| effect of sampling method on contaminant measurement in pore-water and surface water at two uranium operations: can method affect conclusions? | this paper describes a comparison of two methods of sediment pore-water sampling and two methods of surface water sampling that were used in a broader investigation of cause(s) of adverse effects on benthic invertebrate communities at two saskatchewan uranium operations (key lake and rabbit lake). variables measured and compared included ph, ammonia, doc, and trace metals. the two types of sediment pore-water samples that were compared are centrifuged and 0.45-microm filtered sediment core sampl ... | 2009 | 18726245 |
| an estimation of radiation doses to benthic invertebrates from sediments collected near a canadian uranium mine. | a new method is described for calculating radiation doses to benthic invertebrates from radionuclide concentrations in freshwater sediment. both internal and external radiation doses were estimated for all 14 principal radionuclides of the uranium-238 decay series. sediments were collected from three sites downstream of a uranium mining operation in northern saskatchewan, canada. sediments from two sites, located approximately 1.6 and 4.4 km downstream from mining operations, yielded absorbed do ... | 2001 | 11686646 |