LETHAL DOSES OF SEVERAL COMMERCIAL CHEMICALS 

 FOR FINGERLING CHANNEL CATFISH 



by 

 Howard P. Clemens and Kermit E. Sneed 



The data in the following table were collected during the 

 screening of several chemicals to determine the toxicity of some of 

 those in use or that might be useful in various phases of channel cat- 

 fish culture. The information reported should be useful to fishery 

 workers interested in control of diseases, pEirasites, aquatic vegeta- 

 tion, and pollution of our streams and lakes. We have not yet tested 

 the effectiveness of these chemicals for these control purposes. 



Experiments were conducted in a manner identical with those 

 previously reported —' , with the exception of chemicals marked with 

 an asterisk in table 1. In these tests, 4-gallon aquariums were used 

 instead of quart jars, and 10 channel catfish fingerlings, 2 to 3 

 inches long, were placed in each aquarium. The diluent in all cases 

 was tap water of the University of Oklahoma, and its chemical analy- 

 sis was reported in the paper referred to above. One hundred or two 

 hundred fish were used in each experiment, 10 fish at each concentra- 

 tion. All concentrations are reported as parts per million (p. p.m.) 

 by weight of material as it came from the bottle except that chlor- 

 dane, acetic acid, Chem-Fish Special, sodium arsenite, toxaphene, 

 sodium pentachloTophenolate, and formalin were expressed as p. p.m. 

 by volume. 



We are grateful to the following companies who supplied 

 the various chemicals in addition to others which have not yet been 

 tested: American Cyanamid Company; Barada & Page, Inc.; California 

 Spray Chemical Corporation; Carbide and Carbon Chemicals Company; 

 Chemical Insecticide Corporation; Dow Chemical Company; E. I. du 

 Pont de Nemours & Company; Mallinckrodt Chemical Works; Merck & Com- 

 pany, Inc.; Monsanto Chemical Company; and Thompson-Hayward Chemical 

 CompEiny. 



\/ Clemens, Howard P., and Kermit E. Sneed. The chemical control 

 of some diseases and parasites of chzmnel catfish. U. S, 

 Department of the Interior, Fish and Wildlife Service, Progres- 

 sive Fish-Culturist, vol. 20, No. 1, 1958, pp. 8-15. 



