Abstract
AbstractIn the batch test with daily exchange of medium the effect of copper ions at 2.4 mmol/l (Ca2+ + Mg2+) over 10 d of exposure is investigated. The LT50 values and 95% confidence limits at 3.7, 2.1 and 1.0 ppm of Cu were 26.7 (23.6… 29.9), 47.5 (39.6… 57.0) and 101.5 (78.5… 130.7) h, respectively. The LC50 values of copper in ppm were 4.05 (24 h), 1.69 (48 h), 0.829 (9.96 and 0.776 (240 h).
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