PREFACE TO VOLUME II 



This volume contains fifteen papers presented at the Second US-USSR 

 Symposium on the Effects of Pollutants on Aquatic Ecosystems. All of the 

 papers were presented in English or Russian with simultaneous 

 translations into the corresponding language at Borok, Jaroslavl Oblast, 

 USSR during June 22-26, 1976 at the Institute for the Biology of Inland 

 Waters of the USSR Academy of Sciences. 



Professor N.V. Butorin, Director of the Institute and Project Leader 

 for the Soviet side, served as official host for the American delegation 

 and has assumed the responsibility for the publication of these pro- 

 ceedings in the Russian language. This joint bilingual publication re- 

 presents a reaffirmation of the continuing commitment pledged by both 

 countries to cooperative environmental activities. 



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