MICHIGAN (Cont. ) 



by quantitative and qualitative sampling. The importance of bottom fauna on 

 trout production is part of the study. 



Ogemaw County; began 1950, continuing; $5,314; Robert J. Ellis, Leader; 

 reports available. 



Address inquiries to: As in No. 3 above. 



24. Availability of Fish Food Organisms in Selected Southern Michigan Lakes 



Year around quantitative and qualitative samples of fish food organisms 

 are taken from selected warm water lakes in Michigan to determine the factors 

 which influence the availability and utilization of fish food organisms. Also, 

 limnological studies on plankton, nitrogen and phosphorus, and chemical 

 characteristics of bottom soils are made. 



Seven lakes in southern Michigan; began 1952, continuing; $5, 314; Frank F. 

 Hooper, Leader; reports available. 



Address inquiries to: As in No. 3 above. 



25. Trout Food Studies With Special Emphasis on the Percentage of Midge Larvae 

 in Food. 



Samples are taken at monthly intervals. Stomach samples are obtained 

 from angler -caught and shocker -caught fish and bottom samples are collected 

 from areas where shocking is done. 



Hxint Creek, Pigeon River, AuSable River; began 1953, continuing; $1,139; 

 LaVerne L. Curry, Leader. 



Address inquiries to: As in No. 3 above. 



26. Relation of Limnological Conditions to Periodicity of Growth and Change of 

 Condition, Brook Trout in Lakes 



The objectives are to determine the relationship of plankton and bottom 

 faxina abundance and chemical conditions to growth of fish; and to furnish basic 

 data to be used in determining rate and time of stocking and regulations. 



Trout lakes in Pigeon River Research Area; began 1957, to close 1959; 

 $2,657; Thomas F. Waters, Leader. 



Address inquiries to: As in No. 3 above. 



27. Parasites and Diseases of Fish 



Macro- and microscopic examination is made of sick fish in hatcheries 

 with recommendations for treatment. Study and identification of fish parasites 

 and diseases is conducted on a statewide basis. 



Statewide; began 1942, continuing; $2,657; Leonard N. Allison, Leader; 

 reports available. 



Address inquiries to: As in No. 3 above. 



28. Check List of Fish Parasites in Michigan 



Preparation and maintenance of a host parasite distribution list of para- 

 sites foxind in fish from Michigan waters is under way. 



Statewide; began 1942, continuing; $3,416; Leonard N. Allison, Leader; 

 reports available. 



Address inquiries to: As in No. 3 above. 



29. Occurrence of Furunculosis in Rainbow Trout From the Great Lakes 



The incidence and origin of furunculosis is being investigated in "wild" 

 lake-run rainbows, specifically from Lake Huron into the East Branch of the 

 Au Gres River where disease was first reported. Histological examination 

 of preserved kidneys and cultures of fresh material is made when available. 



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