MISSOURI (Cont. ) 



Statewide; began 1951, continuing; Herbert J. Fisher, Leader. 



Address inquiries to: Herbert J. Fisher, Fisheries Section, Conservation 

 Commission, 903a Elm St. , Columbia, Missouri. 



14. A Study of the Effect Upon Fish of the Drawdown of Navigation Pools in the 

 Missouri Section of the Mississippi River 



Conservation agents and commercial fishermen assist in the project by- 

 reporting water conditions and fish mortality at sites affected by drawdown. Each 

 report of fish mortality is investigated and an estimate of the fish killed is made. 

 The Corps of Engineers, U. S. Army, cooperate by making available daily 

 records of temperature, ice condition, snow cover, and pool elevation at each 

 lock and dam in the study area. Comnnercial fishermen aid as observers. 



U. S. Army Corps of Engineers cooperating; Mississippi River between 

 Alton, Illinois, and Keokuk, Iowa; began December 1946, continuing; Herbert J. 

 Fisher, Leader. 



Address inquiries to: Herbert J. Fisher, as in No. 13 above. 



15. Aerial Fishing and Recreational Count of the Missouri-Illinois Section of the 

 Mississippi River 



This project is conducted to obtain information on use of this section of the 

 river by sport fishermen and pleasure boaters. Counts of fishing boats, boat 

 fishermen, bank fishermen and pleasure craft are made by Illinois and Missouri 

 observers on 16 flights scheduled from April through October. Missouri fur- 

 nishes a plane and a pilot on eight flights and Illinois furnishes a plane and a pilot 

 on the other eight flights. 



Illinois Conservation Department and Illinois Natural History Survey co- 

 operating; Missouri-Illinois section of the Mississippi River; began April 1956, 

 to close October 1957; Herbert J Fisher, Leader. 



Address inquiries to: Herbert J. Fisher, as in No. 13 above. 



16. A Statewide Continuing General Creel Census 



The census is carried on to determine the utilization of the fishery resources 

 of the State, to detect trends, and to determine the effect of regulations. Con- 

 servation agents record creel information from 20 percent of all anglers inter- 

 viewed in the regular course of their duties as enforcement officers. These 

 data are tabulated by fishery technicians. Rate of success and species composi- 

 tion of the catch are determined for the various watersheds and impoundments 

 and for the major zoogeographic areas of the State. Results for previous years 

 are available for comparison. 



Statewide; began May 1946, continuing; John L. Funk, Leader. 



Address inquiries to: John L. Fvmk, Fisheries Section, Conservation 

 Commission, 903a Elm Street, Columbia, Missouri. 



17. A Study of the Migration of Stream Fishes 



This study is made to deternnine the extent of the movements of warm 

 water stream fishes and to correlate, if possible, movennents with season, 

 water conditions, and population pressure. Fish collected in population studies 

 are tagged and released. Records of tagged fish caught by fishermen are anal- 

 yzed to determine for each species: (1) average time and distance traveled, (2) 

 direction and season of greatest movement. 



Statewide; began 1947, continuing; John L. Funk, Leader. 



Address inquiries to: John L. Funk, Fisheries Section, Conservation Com- 

 mission, 903a Elm Street, Columbia, Missouri. 



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