MICHIGAN (Cont. ) 



14. Experimental Control of Sea Lamprey Spawning Populations in Streams Tributary 

 to Lake Superior and Lake Michigan. 



The objectives are to install electrical or physical barriers in streams known 

 to be utilized by sea lampreys for spawning and to operate these structures in a 

 manner sufficient to reduce or eliminate reproduction and ultimately predation 

 on lake trout and other fishes, and to determine the effects of barriers on species 

 of fish migrating into streams at the same time as the sea lamprey. 



Hdqrs. Marquette; began 1953, continuing; Leo F. Erkkila, Leader. 



Address inquiries to: James W. Moffett, as in No. 1 above. 



15. Characteristics and Abundance Indices of Lake Huron Sea Lamprey Stocks. 



Objectives of this project are to determine the relative abundance of adxilt 

 sea lamprey spawning stocks by continued operation of mechanical weirs which 

 have been in use for four or five years; to ascertain the number of larval genera- 

 tions normally inhabiting a stream, from which spawning sea lampreys have 

 been blocked for several years, by capturing each downstream migrating year 

 class as it reaches maturity. 



Hdqrs. Hammond Bay Fisheries Laboratory, Rogers City; began 1951, 

 continuing. Vernon Applegate, Leader. 



Address inquiries to: Jannes W. Moffett, as in No. 1 above. 



MINNESOTA 

 Department of Conservation 



1. Yield and Dynamics of a Lake Trout Lake. 



Information on yield, fish mortality, and population structure of a typical 

 trout lake is being gathered with a view toward better management. 



Lake near Grand Marais; began January 1951, indefinite; Donald Franklin, 

 Robert E. Schmacher, Leaders. 



Address inquiries to: Dr. John B. Moyle, Supervisor, Fisheries Research 

 Unit, 355 Shubert Building, St. Paul, Minn. 



2. Development of Better Methods of Pond Management for Rearing Minnows and 

 Warm-water Game Fishes. 



Better methods of pond management will be determined through detailed 

 studies of pond dynamics, including water and soil chemistry, and fish yield. 



Statewide; began January 1948, continuing; John Dobie, Leader; report 

 available. 



Address inquiries to: John B. Moyle as in No. 1 above. 



3. Survival of Walleye from Fingerlings to Yearlings. 



The objective is to determine the survival rate of planted walleye finger - 

 lings under varying degrees of competition. 



Lake near Brainerd; began September 1951, continuing; John E. Maloney, 

 Leader; reports available. 



Address inquiries to: John B. Moyle as in No. 1 above. 



4. Effect of Stream Improvement on Trout Populations and Fishing. 



The value of stream improvement of the usual type to survival of planted 

 trout, stream carrying capacity, and fishing yield of trout is being investigated. 



Split Rock River in northeastern Minnesota; began May 1950, planned for 5 

 years; John Hale, Leader; reports available. 



Address inquiries to: John B. Moyle, as in No. 1 above. 



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