WISCONSIN (Cont. ) 



the number, quantity, size and kind of food items that are taken by muskellunge. 

 (3) To determine age, rate of growth, length-weight changes of muskellunge 

 and to correlate with the available food. (4) To determine the physical, chemi- 

 cal and biological conditions that are present in rearing ponds and to determine 

 which of these conditions, if any, are optimum for muskellunge growth. (5) To 

 develop and test nriethods for marking fish other than the conventional finclip 

 methods. (6) To determine the relative survival of small and large size 

 muskellunge that are stocked in lakes. 



Spooner; began April 1953, indefinite; $7,000; Leon D. Johnson, Leader; 

 reports available. 



Address inquiries to: Fish Management Division, Wisconsin Conserva- 

 tion Department, Spooner, Wisconsin. 



5. Evaluation of Watershed Stabilization Practices on Trout Streams 



The objectives are to evaluate the degree of improvement or stability result- 

 ing from various modifications made within different watersheds and their 

 streams. 



The project aims at study of changes in physical and biological conditions, 

 such as water temperatures, total fish populations, fish yield, natural repro- 

 duction, fish food, cover, stability of water flow and changes in the degree 

 of siltation. 



These studies evaluate conditions for trout in streams before and after 

 stream improvement. Different kinds of trout streams with different im- 

 provement problems are selected. 



U. S. Soil Conservation Services and U. S. Geological Survey cooperating; 

 statewide; began December 1953, to close December 1961; $25,000; Oscar M. 

 Brynildson, Leader; reports available. 



Address inquiries to: Oscar M. Brynildson, Nevin State Fish Hatchery, 

 Route 3, Madison 5, Wisconsin. 



6. Management of Lake Sturgeon 



Records of all speared sturgeon are analyzed anniially and the age compo- 

 sition of the catch is compared annually to ascertain exploitation. Tagging 

 studies are continuing in an effort to follow the effect migration has on ex- 

 ploitation and management. Studies are being made of the species spawning 

 habits, early life history, size and age of first maturity, and frequency of 

 spawning. 



Lake Winnebago and associated lakes and tributaries; began January 1953, 

 to close June 1958; $12,500; reports available. 



Address inquiries to: Thomas L. Wirth, Box 358, Oshkosh, Wisconsin. 



7. Experimental Angling With Artificial Flies Only on Peshtigo River 



The object of the project is to evaluate public reaction to a 12 -inch size 

 limit and flying fishing only regulations on a trout stream, and to deternnine 

 the composition of the catch and the contribution of stocked fish and fish 

 from a feeder stream. 



Marinette County; began April 1956, to close September 1958; $3,000; 

 John Klingbiel, Leader; reports available. 



Address inquiries to: John Klingbiel, Northeast Area, Conservation De- 

 partment, Woodruff, Wisconsin. 



8. Effect of Removal of Fresh Water Drum on Other Game Fishes 



Fresh water drum are considered as rough fish and have been removed in 

 limited quantities for over 20 years. The annual removal of this species has 

 been increased 7-fold in recent years in an attempt to severely reduce the 



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