ACKTTOWLEDGIiENTS 



All investigations reported herein were conducted by the 

 "writer vviiile employed as a Fisheries Biologist by the Institute 

 for Fisheries Research of the llichigan Department of Conservation. 

 Funds covering all aspects of the studies were provided by special 

 allotment from the aforementioned agency. Permission to publish 

 these investigations was granted by the liichigan Conservation 

 Department to implement the expanded program of sea lamprey re- 

 search currently being undertaken by the Fish and Wildlife Service. 

 Both Mr, Fred A. Westerman^ Chief, Fish Division, and Dr. Albert S. 

 Hazzard, Director, Institute for Fisheries Research, Tjere most 

 helpful in offering suggestions and in aiding the work program. 

 Dr, Hazzard lilcewise contributed guidance in the technical aspects 

 of the studies. 



The success of the inventory of sea lamprey spawning streams 

 was entirely dependent upon the cooperation of many agencies. The 

 assistance and cooperation of the Conservation officers and their 

 district and regional supervisors of the Division of Field Admin- 

 istration is heremth acknowledged. Members of the Parks and 

 Forestry divisions contributed assistance as did many members of 

 the Fish Division. Messrs. Leland R. Anderson, Dexter B. RejTiolds, 

 W. R. Crowe, L. F. Allison, Stanley Lievense, H. E, Predmore, Jr., 

 and Howard Loeb, as district biologists or members of the Institute 

 staff accomplished much of the field Trork in connection with this 

 study. 



Criticism and assistance in organizing units of biological 

 study and in the preparation of this report was given by Dr, Karl F. 

 Lagler, Department of Zoology, University of Michigan. All figures, 

 drawings, reproductions, and some pictures -mere prepared by 

 Mr. William Cristanelli of the Institute staff. Among the several 

 assistants viho worked ivith me in the laboratory and in the field, 

 I am particularly indebted to Mrs. Eda S, Apple gate, to Mr. Albert N. 

 Gabrielson of Carp Lake, Michigan, and Mr, Earl Schaedig of Rogers 

 City, Michigan. 



Supplementary financial aid for certain phases of the work was 

 supplied by the Trust Fund for Fishery Research of the Associated 

 Fishing Tackle Manufacturers. 



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