A method for assessing chronic effects of toxic substances on the midge,Paratanytarsus parthenogeneticus?Effects of copper

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Abstract
A method was developed for the assessment of the chronic effects of copper on midge larva. Growth and reproduction of the midge was related to copper concentrations greater than 0.08 mg/L; 50% reproductive impairment was apparent at a copper level of 0.37 mg/L. Growth and amount of food uptake by larvae were inversely related to copper concentration. Accumulation of copper in green algae was proportional to copper concentration in the water.