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CHARLES L. YENTSCH 

 Although ray geographical area of interest 

 is the areas of the western north Atlantic, I initially 

 got ray start in this field in the waters in and around 

 Puget Sound, especially the San Juan Islands. Many of 

 these studies, as well as more recent studies, have led 

 me into situations such as I am in today. As a result of 

 these situations, I have set certain guidelines or bases 

 for the opinions that I am about to present, and I would 

 like to discuss these a little bit with you before dis- 

 cussing the items pertinent to the section on plankton 

 productivity in the Federal agency report. 



It is certainly obvious to most of us here 

 that the use of natural waters by industrial and public 

 interests requires some controls. When a conflict of 

 interest arises, it must be resolved by a critical study 

 of the facts, and in my case, in my experience, arriving 

 at these facts one must also always look into the economics, 

 social situations, as well as the natural history conditions 

 of the water. If controls are to be recommended, the group 

 expected to bear the responsibilities for correcting the 

 situation always have the right to ask: 



1. Ara I or the group the sole cause of the 

 problem? 



2. What and how valuable is the thing that 



