Report of the flow-through and static acute test comparisons with fathead minnow and acute tests with an amphipod and a cladoceran

The Center for Lake Superior Environmental Studies of the University of Wisconsin-Superior, Superior, Wisconsin 54880 has completed acute toxicity tests with eighteen organic compounds. Fathead minnows, Pimephales promelas, (30 +/- 5 days old) were exposed to all compounds in flow-through and static exposures with measured chemical concentrations. An amphipod, Gammarus pseudolimnaeus. (adults) were simultaneously exposed with fathead minnows in flow-through exposures to eight of the chemicals. The cladoceran. Daphnia magna, (