Estimating acute copper toxicity to larval fathead minnow (Pimephales promelas) in soft water from measurements of dissolved organic carbon, calcium, and pH

1996 ◽  
Vol 53 (6) ◽  
pp. 1263-1271 ◽  
Author(s):  
P G Welsh ◽  
J L Parrott ◽  
D G Dixon ◽  
P V Hodson ◽  
D J Spry ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Fathead Minnow ◽  
Pimephales Promelas ◽  
Copper Toxicity ◽  
Soft Water

Effect of pH and Dissolved Organic Carbon on the Toxicity of Copper to Larval Fathead Minnow (Pimephales promelas) in Natural Lake Waters of Low Alkalinity

1993 ◽  
Vol 50 (7) ◽  
pp. 1356-1362 ◽  
Author(s):  
P. G. Welsh ◽  
J. F. Skidmore ◽  
D. J. Spry ◽  
D. G. Dixon ◽  
P. V. Hodson ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Fathead Minnow ◽  
Pimephales Promelas ◽  
Multiple Regression Model ◽  
Aquatic Life ◽  
South Central ◽  
Doc Concentration ◽  
Current Water ◽  
Ph Range

The impacts of pH and dissolved organic carbon (DOC) on the acute toxicity of Cu to larval fathead minnow (Pimephales promelas) were determined using natural soft water from two Precambrian Shield lakes in south-central Ontario. By artificially manipulating the pH and DOC levels of the water, we demonstrated that both acidification and the removal of DOC increased the toxicity of Cu. The 96-h Cu LC50s were determined over a pH range from 5.4 to 7.3 and a DOC concentration range from 0.2 to 16 mg∙L−1. The LC50s ranged from a low of 2 μg∙L−1 (pH 5.6, DOC 0.2 mg∙L−1) to a high of 182 μg∙L−1 (pH 6.9, DOC 15.6 mg∙L−1). A multiple regression model (log1096-h Cu LC50 = −0.308 + 0.192 pH + 0.136 (pH∙log10DOC)) was used to describe the relationship between Cu toxicity, pH, and DOC. The model was significant (p < 0.00001) and explained 93% of the variability in the toxicity data. These results suggest that current water quality objectives for Cu, and possibly for other metals, may not be sufficiently protective of aquatic life in soft, moderately acidic water containing low levels of DOC.

Metabolomics confirms that dissolved organic carbon mitigates copper toxicity

2016 ◽  
Vol 35 (3) ◽  
pp. 635-644 ◽  
Author(s):  
Nadine S. Taylor ◽  
Jennifer A. Kirwan ◽  
Norman D. Yan ◽  
Mark R. Viant ◽  
John M. Gunn ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Copper Toxicity

Copper and Cadmium Binding to Fish Gills: Modification by Dissolved Organic Carbon and Synthetic Ligands

1993 ◽  
Vol 50 (12) ◽  
pp. 2667-2677 ◽  
Author(s):  
Richard C. Playle ◽  
D. George Dixon ◽  
Kent Burnison
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Pimephales Promelas ◽  
Size Fraction ◽  
Molecular Size ◽  
Cadmium Accumulation ◽  
Fish Gills ◽  
Low Concentrations ◽  
Freeze Dried ◽  
Doc Concentration

Adult fathead minnows (Pimephales promelas) were exposed to 17 g Cu∙L−1 or 6 g Cd∙L−1 for 2 to 3 h in synthetic softwater solutions at pH 6.2 containing either naturally-occurring, freeze-dried dissolved organic carbon (DOC) or synthetic ligands such as EDTA. After exposures, gills were assayed for bound Cu or Cd. As a first approximation, lake of origin or molecular size fraction of DOC did not influence Cu binding to gills, while DOC concentration did. DOC concentrations ≥4.8 mg∙L−1 prevented Cu from accumulating on fathead gills. At the relatively low concentrations used, neither Cu nor Cd interfered with binding of the other metal on gills, suggesting different gill binding sites. Cadmium accumulation on gills was more sensitive to increased concentrations of Ca and H+ than was Cu. Surprisingly, Cd bound to gills to the same or greater extent than did Cu: for synthetic ligands, Cd binds less well than Cu. This result corroborates previously published observations that Cd, unlike Cu, is taken up at gills through high affinity Ca channels. Accumulation of Cd on fish gills was never associated with 14C-labelled EDTA or 14C-citrate, indicating that free metal interacts with the gill while metal–ligand complexes usually do not.

Chronic Toxicity of Copper to the Fathead Minnow (Pimephales promelas) in Soft Water

1969 ◽  
Vol 26 (9) ◽  
pp. 2449-2457 ◽  
Author(s):  
Donald I. Mount ◽  
Charles E. Stephan
Keyword(s):  
Chronic Toxicity ◽  
Fathead Minnow ◽  
Pimephales Promelas ◽  
Soft Water ◽  
Toxicant Concentration ◽  
Accuracy And Precision ◽  
Growth And Reproduction

The maximum acceptable toxicant concentration of copper for the fathead minnow (Pimephales promelas, Rafinesque) in water having an EDTA hardness of 30 mg/liter (as CaCO3) was found to be between 0.13 and 0.22 of the 96-hr TLm value, using survival, growth, and reproduction to evaluate effect. In an earlier study the application factor for copper in water with an EDTA hardness of 200 mg/liter (as CaCO3) was found to be between 0.03 and 0.08 for the same species. Suggestions are made that should increase the accuracy and precision of future determinations of application factors.

Salinity and dissolved organic carbon both affect copper toxicity in mussel larvae: Copper speciation or competition cannot explain everything

2015 ◽  
Vol 34 (6) ◽  
pp. 1330-1336 ◽  
Author(s):  
David Deruytter ◽  
Michiel B. Vandegehuchte ◽  
Jan Garrevoet ◽  
Frederik De Laender ◽  
Eva Vergucht ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Copper Toxicity ◽  
Copper Speciation
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