MICHIGAN (Cont. ) 



4. Studies of Basic Food Relationships of Pond and Lake Fishes. 



This project is concerned with the amount of food at different tropic levels necessary 

 to support a growing population of forage fishes. The effects of altering the pre- 

 dation load on the lower levels of the food chain are under observation. 



Southern Mich. ; Dept. of Conservation cooperating; began 1950, continuing; re- 

 prints available. 



Address correspondence to: Robert C. Ball, Dept. of Fisheries and Wildlife, 

 Mich. State College, East Lansing, Mich. 



5. Trout Stream Management. 



The purpose of this project is to test different trout management practices on a 2 to 

 4 mile length of streann where controlled observations are possible. 



Augusta Creek, Kalamazoo County; began in 1934, continuing; $200; P. I. Tack, 

 W. F. Morofsky, and W. A. Lemmien; some reprints available. 



Address correspondence to: Dr. P. I. Tack, Dept. of Fisheries & Wildlife, 

 405 Natural Science Bldg. , East Lansing, Mich. 



6. Farm Fish Pond Management. 



This project is designed to test the applications and limitations of the farm pond in 

 Michigan, and to devise, if possible, management practices suitable to this 

 region. 



North Central Mich. ; began in 1944, continuing; P. I. Tack and W. F. Morofsky; 



reprints available. 

 Address correspondence to: Dr. P. I. Tack, Dept. of Fisheries & V^ildlife, 



Mich. State College, East Lansing, Mich. 



Sharpies Chemical Inc. 



1. Evaluation of Plant Wastes and Necessary Dilution Ratios. 



The objective of this project is to determine toxicity of plant wastes and find 

 minimum dilution ratios needed for fresh water fish. 



Continuing. 



Address correspondence to: Leslie Gillette, Chief Chemist, Sharpies Chemical Inc., 

 Wyandotte, Mich. 



Fish and Wildlife Service, Branch of Fishery Biology 



1. Development of an Electro-Mechanical Sea Lamprey Weir and Trap (Proj. la). 



The objective of this project is to develop a simple sea lamprey trapping device 

 utilizing ordinary alternating current line power in which an electrical field in 

 the water is substituted for the screens or "racks" of a conventional fish weir 

 and trap. 



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