Laboratory predator-prey testing techniques should prove to be a useful 

 tool in future pollution research. As noted, the various techniques available 

 offer different approaches to the question of changes in prey vulnerability. Tlie 

 relative merits of each must be weighed with due consideration to the normal 

 ecology of the predator and prey utilized, and the biological variables which 

 must be controlled. 



ACKNOWLEDGEMENTS 



I would like to thank both Dr. Don C. Miller who suggested this project, and 

 the staff of the EPA, Environmental Research Laboratory for their cooperation 

 and helpful suggestions. I give special thanks to Miss Elaina Kenyon for her 

 invaluable assistance. This work was completed in partial fulfillment of the 

 requirements for Master of Science, Univ. Rhode Island. 



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