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Description: |
11 pages : tables ; 26 cm. |
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With Note: |
With: Toxicity of the molluscicide Bayer 73 and residue dynamics of Bayer 2353 in aquatic invertebrates / by Herman O. Sanders (No. 78) -- Accumulation, elimination, and biotransformation of the lampricide 2',5-dichloro-4'-nitrosalicylanilide by Chironomus tentans / by Joseph A. Kawatski and Ann E. Zittel. (No. 79). |
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Bibliography Note: |
Includes bibliographical references (pages 5-6). |
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Summary, Etc. Note: |
Abstract: The lampricidal effects of 3-trifluoromethyl-4-nitrophenol (TFM), 2',5-dichloro-4'-nitrosalicylanilide (Bayer 73), and a 98:2 mixture of the two (TFM:2B) were tested against larvae of the sea lamprey under controlled laboratory conditions. The lampricides were tested in water temperatures of 7, 12, and 17 degrees Centigrade; total hardnesses of 44, 170, and 300 mg/liter as CaCO3; and pH's of 6.5, 7.5, and 8.5. Temperature had little influence on the toxicity of the lampricides, the effect of Bayer 73 was slowed in cold water. Water hardness did not significantly influence the activity of the 98:2 mixture. The toxicities of TFM, Bayer 73, and TFM:2B were significantly reduced in water of high pH. Burrowed sea lamprey larvae were less vulnerable to TFM, Bayer 73, and TFM:2B than were free-swimming larvae. TFM and TFM:2B were selective for free-swimming lampreys over the nontarget organisms used for comparison, but the margin of safety for nontarget organisms over burrowed sea lampreys was narrow. |