The toxicity of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in Guppies (Poecilia reticulatus Peters) |
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| Authors: | Logan A. Norris Richard A. Miller |
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| Affiliation: | (1) Pacific Northwest Forest and Range Experiment Station Forest Service, U.S. Department of Agriculture, 97331 Corvallis, Ore. |
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| Abstract: | Summary Exposure of guppies to 0.1, 1.0, or 10.0 ppb TCDD for 120 hours caused complete mortality in the next 32, 21, and 30 days, respectively. Duration of survival was significantly and positively correlated with body length. The concentrations of TCDD used in these tests were considerably greater than expected to occur in forest streams after aerial application of 2,4,5-T. The threshold-response level for TCDD in fish has not been reported. |
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