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Induction of Tolerance to Heavy Metals in Natural and Laboratory Populations of Fish

机译:诱导鱼类自然和实验室种群对重金属的耐受性

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Aquatic toxicity studies were performed on two natural populations of fathead minnows. One group of organisms was taken from a metal-contaminated flyash pond associated with a coal-fired power plant and the other group was collected from relatively uncontaminated hatchery ponds. Acute tests indicated that flyash pond fish were significantly more tolerant to cadmium and copper than were hatchery fish. As an exposed concentration of 6.0 mg Cd/l in moderately hard water, the median period of survival for flyash pond fish was 50.0 hr compared to 6.8 hr for hatchery fish. Bouth groups of organisms were about equally sensitive to zinc.

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