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Recent Intra- and Interlaboratory Studies Related to the Development and Standardization of Environment Canada's Biological Test Methods for Measuring Sediment Toxicity Using Freshwater Amphipods (Hyalella Azteca) Or Midge Larvae (Chironomus Riparius).
註釋USEPA utilizes an automated static-renewal system in its sediment toxicity tests with H. azteca or C. tentans while Environment Canada recommends both the static and the static-renewal systems. The first objective of this study was to compare the performance of the static vs. the static-renewal option. The second objective of this study was to evaluate different food types and feeding rates for the static and static-renewal test options using H. azteca or C. riparius. A third objective was to ascertain a suitable criterion for minimum acceptable growth of control animals in clean sediment, according to each test option and species. A fourth objective was to evaluate the reproducibility of each of the two test options, as determined by a series of interlaboratory studies using Environment Canada's standardized test methods for H. azteca or C. riparius.