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Journal Article 
The sensitivity of Ceriodaphnia dubia and Daphnia magna to seven chemicals utilizing the three-brood test 
Cowgill, UM; Milazzo, DP 
Archives of Environmental Contamination and Toxicology
ISSN: 0090-4341
EISSN: 1432-0703 
This paper reports the sensitivity of Ceriodaphnia dubia and Daphnia magna to ethanol, acetone, phenol, 4-chlorophenol, trichloromethane, diethanolamine and chlorobenzene, utilizing the three-brood test. The endpoints examined include survival at 48 h and at the end of the three-blood test, total progeny, number of broods, mean brood size, and dry weight. The final calculated result was the LC5050 or that concentration of the test solution that reduced the variable in question to 50% of that of the controls. Total progeny, number of broods and mean brood size provided results of the same order of magnitude for each compound for a specific organism. Dry weight proved to be a poor endpoint. The response of C. dubia to six compounds failed to provide a determinable EC50 due to a lack of significance of the regression equation. In the case of D. magna, only five of the seven compounds provided a determinable result for dry weight. Compared to the results based on total prog 
Biology methods; Conservation of natural resources; Ecology; Marine biology; Biochemistry; Genitalia physiology; Genitalia metabolism; Reproduction; Genitalia pathology; Genitalia physiopathology; Poisoning; Animals; laboratory; Environmental pollutants poisoning; Occupational diseases; Air pollution; Soil pollutants; Water pollution; Anatomy; comparative; Animal; Crustacea; Physiology; Pathology; 111-42-2; 108-95-2; 108-90-7; 106-48-9; 67-66-3; 67-64-1; 64-17-5 
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