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Statistical models to predict the toxicity of major ions to Ceriodaphnia dubia, Daphnia magna and Pimephales promelas (fathead minnows)
Author(s) -
Mount David R.,
Gulley David D.,
Hockett J. Russell,
Garrison Tyler D.,
Evans James M.
Publication year - 1997
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620161005
Subject(s) - ceriodaphnia dubia , pimephales promelas , daphnia magna , minnow , toxicity , cladocera , branchiopoda , environmental chemistry , biology , toxicology , daphnia , chemistry , ecology , fishery , fish <actinopterygii> , crustacean , organic chemistry
Toxicity of fresh waters with high total dissolved solids has been shown to be dependent on the specific ionic composition of the water. To provide a predictive tool to assess toxicity attributable to major ions, we tested the toxicity of over 2,900 ion solutions using the daphnids, Ceriodaphnia dubia and Daphnia magna , and fathead minnows ( Pimephales promelas ). Multiple logistic regression was used to relate ion composition to survival for each of the three test species. In general, relative ion toxicity was K + > HCO 3 − ≈ Mg 2+ > Cl − > SO 4 2− ; Na + and Ca 2+ were not significant variables in the regressions, suggesting that the toxicity of Na + and Ca 2+ salts was primarily attributable to the corresponding anion. For C. dubia and D. magna , toxicity of Cl − , SO 4 2− , and K + was reduced in solutions enriched with more than one cation. Final regression models showed a good quality of fit to the data ( R 2 = 0.767–0.861). Preliminary applications of these models to field‐collected samples indicated a high degree of accuracy for the C. dubia model, while the D. magna and fathead minnow models tended to overpredict ion toxicity.