MICHIGAN (Cont. ) 



17. Angling Experinnents, Hillsdale Ponds. 



Complete angling record is secured under a permit system enabling study of 

 the rate of rennoval by angling from a known fish population. 



Hillsdale County; began 1946, continuing; $2, 376; K. G. Fukano, Leader; 

 reports available. 



Address inquiries to: Institute for Fisheries Research, as in No. 1 above. 



18. Creel Census, Rifle River Area. 



Fronn records of all angling, angling pressure is determined and trends 

 noted in angling quality throughout Rifle River Area. 



Rifle River Area; began 1945, continuing; $9, 504; D. S. Shetter, Leader. 

 Address inquiries to: Institute for Fisheries Research, as in No. 1 above. 



19. Stream Bottom Faxina - Rifle River Improvement Project. 



The objective is to determine abundance and composition of bottom fauna in 

 Houghton Creek and other tributaries of Rifle River over a period of years by 

 quantitative and qualitative sampling. The importance of bottom fauna in trout 

 production is part of the study. 



Houghton Creek and other tributaries in upper end of Rifle River drainage; 

 began 1950, continuing; $4, 669; Robert J. Ellis, Leader. 



Address inquiries to: Institute for Fisheries Research, as in No. 1 above. 



20. Trout Population - Rifle River. 



Through various techniques the population trends of trout in Upper Rifle 

 River are followed as a method of evaluating effects of watershed improvement. 



Upper Rifle River, Ogemaw County; began 1950, continuing; $4, 752; 

 Howard Gowing, Leader. 



Address inquiries to: Institute for Fisheries Research, as in No. 1 above. 



21. Experimental Planting of Fingerling Brown Trout. 



The project will determine survival of marked fingerling brown trout through 

 creel census and periodic population checks. 



Rifle River, Ogemaw County; began 1952, planned for 6 years; $297; Howard 

 Gowing, Leader. 



Address inquiries to: Institute for Fisheries Research, as in No. 1 above. 



22. Creel CensUs, Pigeon River. 



The project, aided by a permit system, secures complete record of angling 

 pressure and fishing quality on 4. 8 miles of Pigeon River. 



Pigeon River area; annually throughout trout season; $5,049; E. L. Bacon, 

 Leader. 



Address inquiries to: Institute for Fisheries Research, as in No. 1 above. 



23. Creel Census, Hunt Creek. 



By securing records of all fishing on the experimental area, trends are 

 followed in angling pressure and success. Creel census resiilts are also used 

 to evaluate the experimental program. 



Hunt C:eek Trout Experiment Station; began 1939, continuing; $9,504; 

 D. S. Shetter, Leader. 



Address inquiries to: Institute for Fisheries Research, as in No. 1 above. 



24. Brook Trout Spawning Studies, Hunt Creek. 



The project is set up to secure exact information on length of spawning 

 season, number of redds in which eggs are deposited, preferred sites for redds, 

 and number of young resulting from spawning of known numbers of adults of 



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