ABSTRACT 



Results of a cooperative survey of the central and eastern basins of 

 Lake Erie in 1928-29 by the U. S. Bureau of Fisheries, New York State 

 Conservation Department, Ontario Department of Game and Fisheries. 

 Health Department of the City of Buffalo, and the Buffalo Society of 

 Natural Sciences are presented in a series of papers. Physicochemical 

 data include seasonal, vertical, and horizontal variations in temperatures, 

 water movements, dissolved oxygen, carbon dioxide, phenolphthalein and 

 methyl -orange alkalinity, pH, chlorides, and turbidity. The species com- 

 position, seasonal abundance, and distribution of micro- and macroplankton 

 are discussed in detail. Special consideration is given to the influence of 

 polluted river waters which flow into the lake. 



It is concluded that the lake is remarkably free from chemical and 

 sewage pollution. Evidence of pollution farther than 1 mile from possible 

 sources was detected at only 2 stations. The nutrient level of Lake Erie is 

 high and the lake should support large fish populations. 



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