MICHIGAN (Cont. ) 



Streams which support rainbow runs from Great Lakes; began 1952, con- 

 tinuing; $759; Leonard N. Allison, Leader. 



Address inquiries to: As in No. 3 above. 



30. Kidney Disease in Trout in Michigan 



The objective is to investigate the possibility of establishment of disease 

 in trout in streams and lakes by stocking (accidentally) diseased fish. Control 

 in hatcheries by drugs or by rearing of disease resistant trout is being attempted. 



Statewide; began 1956, to close 1957; $1,139; Leonard N. Allison, Leader. 



Address inquiries to: As in No. 3 above. 



31. Ecological Study of Red Cedar River 



The objective is to determine ecological effects of industrial and domestic 

 pollution, flood waters, low stream flow, and wide latitude of ten-iperature on 

 the vertebrate and invertebrate animal population of the stream. A complete 

 physical and chemical analysis of water above and below sources of pollution 

 is made. Animal populations will also be sampled. 



Began 1955, to close 1957; $2,657; Morris L. Brehmer, Leader. 



Address inquiries to: As in No. 3 above. 



32. Studies on the Use of Toxaphene in Fish Eradication 



Tests of toxicity to fish and invertebrates will be made in laboratory and 

 in natural waters. Duration of toxicity will also be determined. 



Selected lakes; began 1954, closed 1956; $2,277; Frank F. Hooper, Leader; 

 reports available. 



Address inquiries to: As in No. 3 above. 



33. Bioassay of Chemicals Used in Public Waters 



Laboratory tests are made for toxicity level of chemicals to fish and fish 

 food organisms. Field tests of weed killers, algaecides, and fish poisons 

 are carried on. 



Hillsdale Hatchery; began 1954, continuing; $2,277; Frank F. Hooper, 

 Leader; reports available. 



Address inquiries to: As in No. 3 above. 



34. Use of Underwater Swimming Equipment in Fisheries Investigations 



The objective is to determine practicability of self-contained breathing 

 apparatus in vmderwater photography, fish collecting, ecological observations, 

 and other studies. 



Selected lakes; began 1954, to close 1958; $6,832; M. G. Galbraith, Jr., 

 Leader; reports available. 



Address inquiries to: As in No. 3 above. 



35. Predator-Prey Relations of Warm-Water Fishes 



By observation and sampling food preferences and feeding habits of 

 northern pike, muskellunge, walleye, largemouth bass , gar, and dogfish are 

 determined. The value of predator fishes in maintaining population balance 

 in lakes is being investigated. 



Hastings Fisheries Research Station; began 1956, continuing; $9,109; 

 John E. Willianns, Leader. 



Address inquiries to: As in No. 3 above. 



36. General Creel Census 



This project consists of a random creel census by conservation officers. 

 Statewide; began 1927, continuing; $4,175, K. G. Fukano, Leader; reports 

 available. 



Address inquiries to: As in No. 3 above. 



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