ILLINOIS (Cont. ) 



3. Ecology of Stream Fishes 



The objective is to investigate the factors which control the relative abun- 

 dance of various kinds of fishes in small swift streams of upland Illinois, 

 with special emphasis on the amallmouth bass and other fishes of interest and 

 importance to sport fishermen. 



Jordan Creek is in east-central Illinois and is a base point for studies 

 because its flow may be spanned by weirs for controlling the movement of 

 indigenous fishes. Other streams, mainly in central Illinois, are being 

 studied. 



Illinois Department of Conservation cooperating; central Illinois; began 

 1949, indefinite; R. Weldon Larimore, Leader; reports available. 



Address inquiries to: R. Weldon Larimore, 277 Natural Resources 

 Building, Urbana, Illinois. 



4. Commercial Fishing and Sport Fishing Yields from a Bottomland Lake Ad- 

 jacent to the Illinois River 



For six years, Chautauqua Lake near Havana, Illinois, has been cropped 

 with commercial fishing tackle of various kinds. At the same tinae, the lake 

 has been open to controlled hook-and-line fishing. 



Illinois Department of Conservation and the U. S. Fish and Wildlife 

 Service cooperating; Havana; began 1950, indefinite; William C. Starrett, 

 Leader; reports available. 



Address inquiries to: William C. Starrett, Illinois Natural History 

 Survey, Havana, Illinois. 



5. Smallmouth Bass in Warm-Water Ponds 



To discover the factors that control populations of smallmouth bass in 

 typical warm-water ponds in Illinois, a number of ponds have been stocked with 

 smallmouth bass alone or in combination with other kinds of fishes. Warm 

 water in itself does not seem to be a limiting factor as far as the smallmouth 

 bass is concerned. 



Central Illinois; began 1946, indefinite; George W. Bennett, Leader. 



Address inquiries to: George W. Bennett, as in No. 2 above. 



Quincy College 



1. Bottom Faxina of the Middle Mississippi River in Relation to Navigation Struc- 

 tures and Practices 



The objective is to study the effects of water-level variation in a naviga- 

 tion pool on bottom organisms. Year-round collections were made in the river 

 and in a connected secondary channel over a 2 -year period; one year in which 

 the water level was maintained at all times, and one year in which the water 

 level was drawn down 4 feet during the winter. 



National Science Foundation Grants cooperating; Cottonwood Chute and 

 Mississippi River Pool No. 21, opposite Quincy; began November 1954, closed 

 November 1956; $3500; Troy C. Dorris, Leader. 



Address inquiries to: Troy C. Dorris, Department of Zoology, Oklahoma 

 A. and M. , Stillwater, Oklahoma. 



Southern Illinois University 



1. Comparison of the Growth of Redear Sunfish and Bluegill Frona Lake Murphys- 

 boro 



A study of the growth of these species that were stocked in Lake Murphys- 

 boro at the same time to determine if it is desirable to continue stocking the 

 redear sunfish in this region. 



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