MICHIGAN (Cont. ) 



same environment and to determine whether this toxicant can be applied in 

 streams in an efficient and economical manner. 



Hammond Bay Fishery Laboratory, Rogers City; began June 1950, con- 

 tinuing; $70,000; Vernon C. Applegate, Leader. 



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



6. Experimental Control of Sea Lamprey Spawning Popvilations in Streams Tribu- 

 tary to Lakes Superior and Michigan 



The objectives are to install electrical or physical barriers in streams 

 known to be utilized by sea lamprey for spawning and to operate these structures 

 in a manner sufficient to reduce or eliminate reproduction and ultimately preda- 

 tion 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. 



Michigan Department of Conservation, Wisconsin Conservation Depart- 

 ment and Canadian agencies cooperating; U. S. shores of Lakes Superior and 

 Michigan; began April 1953, continuing; $163, 000; Leo F, Erkkila and Bernard R. 

 Smith, Leaders; reports available. 



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



7. Testing the Effects of Planting Methods, Times of Planting and Influence of 

 Size at Planting on the Survival of Lake Trout in Lake Superior 



It is hoped to develop efficient methods of producing and stocking of lake 

 trout to be used in the rehabilitation of these fish in Lakes Michigan, Huron, 

 and Superior after sea lamprey populations are under control. Lake trout held 

 over various periods in hatcheries are marked. They are then stocked at dif- 

 ferent times and their survival determined from marked fish returned. Plant- 

 ing is done over areas where native lake trout of the same size range are found 

 by exploratory fishing. 



Michigan Department of Conservation, Wisconsin Conservation Depart- 

 ment and Minnesota Department of Conservation cooperating; Marquette; began 

 December 1951, continuing; Paul Eschmeyer and James W. Moffett, Leaders. 



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



8. Life History Studies of Fishes of the Great Lakes 



The objectives of this project are to obtain fundanaental information on the 

 life histories of commercially important species in such matters as identity of 

 populations, movements, seasonal and local abundance, fluctuations in growth, 

 and strength of year classes. 



Ann Arbor; began May 1950, continuing; $35,000; Ralph Hile, Leader; re- 

 ports available. 



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



9. Movements of Lake Trout in Lake Superior 



Through the tagging of both legal-sized and under-sized lake trout in dif- 

 ferent regions of Lake Superior the extent of migrations with special reference 

 to the possible presence of local races and movements across interstate and 

 international boundaries will be determined. 



Marquette; began June 1950, continuing; $15,000; Joseph Beil, Leader; 

 reports available. 



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



10. Limnological and Fishery Survey of Saginaw Bay 



This project is designed to develop information on the limnology and 

 fisheries of Saginaw Bay and to relate these features to each other to deter - 

 nnine their influences on abundance, growth, and fluctuations in available popu- 

 lations. Synoptic surveys of the major biological and hydrographic features 



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