Wright, Stillman, and Wilbur M. Tidd (continued) 



zooplankton, and bottom fauna. It was held that the harm 

 from the heavy pollution of certain limited areas was in 

 some measure counterbalanced by fertilizing effects of 

 pollutants and that pollution probably was not the con- 

 trolling factor in the production of fish in western Lake 

 Erie, 



Publications by scientists associated with 

 Great Lakes Fishery Investigations 



The following list includes the principal publications of 

 scientists not on the Great Lakes staff but whose research was 

 based primarily on materials supplied by the Fish and Wildlife 

 Service or was part of a cooperative project to which the Service 

 made a significant contribution in the collection of data or through 

 the provision of facilities, 



Ahlstrom, Elbert H, 



1936, The deep-water plankton of Lake Michigan, exclusive of 

 the Crustacea, Trans, Am, Micr. Soc, Vol, 5^, 

 pp, 286-299. 



Results of analysis of plankton from vertical hauls 

 of 1-foot cone-shaped net (No. 20 silk) made from the re- 

 search vessel Fulmar , Gives species lists, grouped in cate- 

 gories of relative abundance, of major phytoplankton groups, 

 protozoans, and rotifers c Includes comrrients on seasonal 

 fluctuations in abundance of certain forms. 



Allirx, Ao Eo 



1929 » Seining records and food of the intermediate stages of 



Lake Erie fishes. In: Preliminary report on the coopera- 

 tive survey of Lake Erie — season of 1928, Bull, Buffalo 

 Soc. Nat, Sci., Vol. ih. No, 3, PPo I88-I9I1, 



Record by niimber and species of fish taken in small 

 number of hauls with Petersen and Helgoland trawls and with 

 $0-foot seine, and analysis of stomach contents of fish taken 

 by seine. 



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