MICHIGAN (Cont. ) 



Hunt Creek, AuSable River, Pigeon River, Rifle River; began June 1952, indefinite; 



$1,566; Laverne L. Curry, Proj. Ldr. 

 Address correspondence to: Institute for Fisheries Research, Univ. Museums 



Annex, Ann Arbor, Mich. 



37. Lake and Pond Fertilization. 



The project aims to determine the practical value of commercial fertilizer as a 

 tool in warm water fish production by experiments in lakes and ponds. 



South Twin Lake, Cheboygan County, Hatchery Ponds at Hastings and Wolf Lake 



Hatcheries; begain in 1946, indefinite; $3,861; R. C. Ball, Proj. Ldr.; published 

 reports available. 



Address correspondence to: Institute for Fisheries Research, Univ. Museunns 

 Annex, Ann Arbor, Mich. 



38. Increasing Productivity of Marl Lakes. 



Additions of organic matter and inorganic fertilizers are made to marl soils to de- 

 termine thei factors limiting production of fish food organisms in marl lakes. 

 Methods of modifying marl lakes so as to increase their productivity are being 

 investigated. 



North Lake, Pintail Pond, Ogemaw County; Fish Lake, Barry County; began June 



1952, indefinite; $2,376; David L. Shull, Proj. Ldr. 

 Address correspondence to: Institute for Fisheries Research, Univ. Museums 



Annex, Ann Arbor, Mich. 



39. Chemical Modification of a Soft-water Lake. 



Effort is being nnade to accomplish alkalization through addition of CaO and CaCO^. 

 Evaluation of the charges is being made by chemical and biological investigation. 



Stoner Lake, Delta County; began in 1952, indefinite; $1,566; R. C. Ball, Proj. 



Ldr. 

 Address correspondence to: Institute for Fisheries Research, Univ. Museunns 



Annex, Ann Arbor, Mich. 



40. Introduction of Redear Sunfish. 



Introductions into selected ponds are being made to test the value of the species for 

 farm ponds. 



Ponds at Hastings and Wolf Lake Hatcheries; began in 1949, indefinite; $297; R. C. 



Ball, Proj. Ldr. 

 Address correspondence to: Institute for Fisheries Research, Univ. Museums 



Annex, Ann Arbor, Mich. 



41. Walleye Sport Fishery Management. 



Introductions of marked (or unmarked) fingerlings are made into selected lakes to 

 determine survival and value of maintenance plantings. 



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