MICHIGAN (Cont. ) 



and wild will be caught b / all methods, released and held in live crates or 

 raceways and observed for instantaneous or delayed mortality. 



Trout streams and hatchery ponds; began 1955, to close 1957; $1,139; 

 David S. Shelter and Leonard N. Allison, Leaders; reports available. 



Address inquiries to: As in No. 3 above. 



68. Autopsy of Trout Following Hooking Loss Experiments 



Fish wli;ch have died following hooking experiments are examined for 

 hook wounds and an effort is made to determine whether death resulted from 

 mechanical injury or disease. 



Trout streams and hatchery ponds; began 1955, to close 1957; $759; 

 Leonard N. Allison, Leader. 



Address inquiries to: As in No. 3 above. 



69. Brook Trout and Brown Trout Fishing Regulations 



The project is designed to test the effect of higher size limits and bait 

 restr ctions on angling quality for brook trout and brown trout. 



Trout streams; began 1949, continuing; $18,218; David S. Shelter, Leader; 

 reports available. 



Address inquiries to: As in No. 3 above. 



70. Winter Fishing for Rainbow Trout 



The objective is to determine whether a winter season, January 1 through 

 March 15, will increase the harvest of maintenance plantings of rainbow trout 

 without seriously effecting spring, summer, or fall fishing for them. The 

 project will also determine the reason for decline of returns from plantings 

 after a few years of good fishing. 



Correy Lake; began 1957, to close 1961; $2, 277; Walter R. Crowe, Leader. 



Address inquiries to: As in No. 3 above. 



71. Effect of Hooking Mortality Upon the Angler's Catch 



Equal numbers of sub-legal trout are caught with worms, flies, and 

 shocker. They are marked with a distinctive fin clip to compare survival to 

 creel of different groups. 



Pigeon River; began 1956, to close 1958; $380; T. F. Waters, Leader. 



Address inquiries to: As in No. 3 above. 



72. Effect of Fly-fishing-only Regulations will increase the survival to legal size 

 and the size of trout in the angler's catch. Flies only are used in Ford Lake, 

 whereas usual bait restrictions are followed at Hennlock Lake. 



Trout lakes on Pigeon River Fisheries Research Area; began 1956, to 

 close 1958; $759; T. F. Waters, Leader. 



Address inquiries to: As in No. 3 above. 



73. Birch Lake Fish Management 



The project is designed to determine the value and effects of planting trout 

 and smallmouth bass, the effect of ciscoe gill netting, the need for a screen 

 in the outlet, and the effect of May 15 opening date. A creel census, marked 

 plantings, and a two-way weir in the outlet are involved. 



Cass County; began 1937, continuing; $2,657; R. N. Schafer, Leader; 

 reports available. 



Address inquiries to: As in No. 3 above. 



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