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Description: |
5 pages : tables ; 27 cm. |
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With Note: |
With: Influences of selected environmental factors on the activity of a prospective fish toxicant, 2-(digeranylamino)-ethanol, in laboratory tests / by C.A. Launer and T.D. Bills (No. 88) -- Toxicities of the lampricides 3-trifluoromethyl-4-nitrophenol (TFM) and the 2-aminoethanol salt of 2',5-dichloro-4'-nitrosalicylanilide (Bayer 73) to four bird species / by Rick H. Hudson. (No. 89). |
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Bibliography Note: |
Includes bibliographical references (pages 4-5). |
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Summary, Etc. Note: |
Abstract: Ethyl-p-aminobenzoate (Benzocaine) was tested for its efficacy as an anesthetic for rainbow trout, brown trout, northern pike, carp, and largemouth bass. Since benzocaine is not water soluble, it was applied with acetone as a carrier. Rates of sedation and recovery were slower in cold water than in warm water. Water hardness had little influence on the activity of benzocaine. Fish were anesthetized faster and recovered more slowly in acid than in alkaline water. Benzocaine produced deep anesthesia, but concentrations that rendered the fish handleable within 5 minutes weer generally not safe for exposures longer than 15 minutes. Concentrations efficacious for fish were not acutely toxic to eggs or coho salmon, chinook salmon, rainbow trout, brown trout, or lake trout. Benzocaine is not registered for fishery use and is neither more effective nor safer than the registered anesthetic, tricaine methanesulfonate (MS-222). |