The 19^2 sea lamprey stream survey in the Lake Superior 

 Basin was organized as a continuation of the 1950-$! survey. Imme- 

 diate objectives during the 1952 season were as follows: 



1. To extend the surveyed area to include all Wisconsin 

 and Minnesota watersheds in the Lake Superior basin. 



2. To identify further, those streams which are pro- 

 ducing or may produce sea lampreys in the future. 



3. To determine the general characteristics of those 

 streams in which control measures may be required. 



The standards and methods used in 1952 differed from those 

 of 1950 and 195l only in that the stream examinations were less in- 

 tensive (Loeb and Hall, 1952). 



All of the streams in Minnesota (Cook, Lake, and St. Louis 

 Counties) and a portion of those in Wisconsin (Iron, Ashland, and 

 Bayfield Counties) were surveyed. In addition, all of the streams 

 on Grand Island, Alger Co\uity, Michigan, were examined. 



The Wisconsin streams were examined during the month of 

 June. Operations in Minnesota began on July 11 and terminated on 

 August 8. 



Personnel included, in addition to the author, Clifford 

 Brynildson, Robert Braem, Earl Schaedig, and George Simmons. The 

 map of Iron County, Wisconsin was prepared by Bernard anith. All 

 other maps are the work of Robert Braem. 



Appreciation is extended to the Minnesota Department of 

 Fish and Game for data concerning the North Shore watersheds, and to 

 the Wisconsin Conservation Department for the offer of their patrol 

 boat for the survey of inaccessible streams. 



