Theses and Dissertations


Title: The toxicities of six rotenone compounds at certain temperatures to the bluegill sunfish, Lepomis macrochirus Rafinesque

Name: Fielding, James Russell, Jr.

Degree: MS

Chair: Dr. H. S. Swingle

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1950

Pages: 70

Keywords: Rotenone,Temperature,Bluegill,Lepomis macrochirus.

Abstract:

The toxicity of six rotenone compounds was tested on the bluegill, Lepomis machrochirus Rafinesque, in aquaria. Experiments were conducted with powdered cube, powdered derris, and emulsifiable rotenone at 50o, 60o, 70o, and 80o F., and with wettable rotenone paste, Rotexcel, and Fish-Tox at 60o and 80oF. In experiments at 50oF. the compounds tested had the following minimum lethal concentrations for the entire populations sampled: emulsifiable rotenone, .65 p.p.m.: cube, .75 p.p.m.: and derris, .80 p.p.m. In experiments at 60oF. the compounds tested had the following minimum lethal concentrations for the entire populations sampled: emulsifiable rotenone, .45 p.p.m.: cube, .50 p.p.m.: derris, .55 p.p.m.: Rotexcel, .65 p.p.m.: and wettable rotenone paste, .90 p.p.m. In experiments at 70oF. the compounds tested had the following minimum lethal concentrations for the entire populations sampled: emulsifiable rotenone, .35 p.p.m.: derris, .45 p.p.m.: and cube, .45 p.p.m. In experiments at 80oF. the compounds tested had the following minimum lethal concentrations for the entire populations sampled: derris, .35 p.p.m.: cube, .35 p.p.m.: emulsifiable rotenone, .35 p.p.m.: Rotexcel, .45 p.p.m.: and wettable rotenone paste, .85 p.p.m. When compared on the basis of equal rotenone content, Rotexcel was the most toxic of the compounds used. Wettable rotenone paste when compared in this manner was only two-thirds as effective as cube.Emulsified forms of rotenone gave the best results at the low temperatures. Fish-Tox gave the poorest results of all compounds being only one-fifth as effective as cube. There is some indication that cube decomposed faster than derris.

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