YELLOW PERCH IN SAGINAW BAY 



369 



3,600r 



1890 1900 1910 1920 1930 1940 1950 1955 



YEAR 



Figure 2. — Annual commercial production of yellow perch in Saginaw Bay, 1891-1955. 



S3 



Q 



O 

 CL 



,000 



o 750- 



500 



250 



CO 

 Q 



< 



to 



o 



X 



z 

 o 



h- 

 o 



Z> 



a 

 o 

 rr 



a 1930 1935 1940 1945 1950 1955 



YEAR 



Figure 3. — Annual fluctuations in the production (solid lines), abundance (long dashes), and fishing intensity (short 

 dashes), of Saginaw Bay yellow-perch fishery. Production in pounds; abundance and intensity, expressed as 

 percentages of 1929-43 average. 



4890.35 0—59 2 



