| Abstract: | Treatment of tributaries to the Great Lakes with the lampricide 3-trifluoromethyl-4-nitrophenol (TFM) occasionally results in incomplete kills of sea lamprey larvae (Petromyzon marinus ) or excessive mortality of nontarget fish. In continuous-flow toxicity tests conducted on the Millecoquins River, Michigan, TFM remained selective for sea lamprey at the ambient stream pH and at an increased pH. At all but one concentration, TFM killed all sea lampreys and none of the target fish. Selectivity decreased when the pH was lowered by approximately 1 unit. TFM at the lowest tested concentration (2.3 mg/L) killed 100% of the sea lampreys, 50% of the rainbow trout (Oncorhynchus mykiss ), and 40% of the fathead minnows (Pimephales promelas ). When the Millecoquins River was treated at a concentration of 4.2 mg/L of TFM, all the caged sea lampreys were killed at the ambient stream pH (8.35). Treated stream water that was diverted through stainless steel tanks killed only 55% of the sea lampreys and none of the nontarget organisms when the pH was raised to 9.23. All of the sea lampreys and nontarget organisms were killed when the pH of the treated water was lowered to 7.25. These results indicate that diurnal changes in stream pH of approximately 1 pH unit can either cause TFM to become toxic to nontarget organisms or render the treatment ineffective for killing sea lampreys. |
| Genre: | Report |
| ProdID: | 2002436 |
| Citation Author: | Bills, T. D.; Johnson, D. A. |
| Citation Contributing Office: | Upper Midwest Environmental Sciences Center |
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| Citation End Page: | 19 |
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| Citation Language: | English |
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| Citation No Pagination: | |
| Citation Number Of Pages: | 13 |
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| Citation Phsyical Description: | pp. 7-19 |
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| Citation Public Comments: | |
| Citation Publisher: | Great Lakes Fishery Commission, U.S. Fish and Wildlife Service |
| Citation Series: | Technical Report |
| Citation Series Code: | Technical Report |
| Citation Series Number: | 57 |
| Citation Search Results Text: | Effect of pH on the toxicity of TFM to sea lamprey larvae and nontarget species during a stream treatment; 1992; Report; Technical Report; 57; Bills, T. D.; Johnson, D. A. |
| Citation Start Page: | 7 |
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| Citation Year: | 1992 |
| Type: | citation/reference |
| Text: | Effect of pH on the toxicity of TFM to sea lamprey larvae and nontarget species during a stream treatment; 1992; Report; Technical Report; 57; Bills, T. D.; Johnson, D. A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DOCUMENT): | http://www.glfc.org/pubs/TechReports/Tr57.pdf |
| Date Other: | Wed, 1 Jan 1992 01:00 -0600 |
| Publisher: | Great Lakes Fishery Commission, U.S. Fish and Wildlife Service |
