CONTENTS 



Page 



Introduction 1 



Materials and methods for laboratory experiments 1 



Materials and methods for field experiments 2 



Results 4 



Toxicity 4 



Duration of toxicity 4 



Removal and revival of fishes 4 



Other results and observations 9 



Discussion 10 



Acknowledgment 11 



Literature cited 11 



This paper is part of a thesis submitted to the Department 

 of Zoology in the Graduate School of Southern Illinois 

 University in partial fulfillment of the requirements for 

 the degree of Master of Science. It is published here be- 

 cause of its general interest in the field of fishery man- 

 agement . 



