CONTENTS 



Page 



Introduction 1 



Study area 1 



Collection of sannples 3 



Fish 3 



Aquatic insects 3 



Water samples 3 



Marine clams and plankton 3 



Insecticide application 4 



Insecticide analyses 4 



Prespray observations 4 



Observations on the dates of spraying 8 



Postspray observations 10 



Evaluation of effects of spraying 13 



Aquatic insects 13 



Fish 13 



Clams and plankton 14 



Conclusions 14 



Acknowledgments 14 



Literature cited 14 



