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Example sentences for: fathead

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The organisms used in the short-term chronic toxicity tests described in this manual are the fathead minnow, Pimephales promelas, the daphnid, Ceriodaphnia dubia (Berner, 1986), and the green alga, Selenastrum capricornutum.
The data sets included short-term chronic toxicity tests for the fathead minnow, Pimephales promelas, and the daphnid, Ceriodaphnia dubia.
For the tests to be acceptable, control survival in fathead minnow, Pimephales promelas, and the daphnid, Ceriodaphnia dubia, tests must be 80% or greater.
Growth data from the fathead minnow, Pimephales promelas, larval survival and growth test are analyzed using hypothesis testing or point estimation techniques according to the flowchart in Figure 2. The above mentioned growth data may also be analyzed by generating a point estimate with the Linear Interpolation Method.
At the end of the test, the average dry weight of surviving seven-day-old fathead minnows in control chambers must equal or exceed 0.25 mg.