FISHERIES IN MICHIGAN WATERS OF GREEN BAT 



11 



700 



600 



— 500 



— r 400 



< 



I- 

 z 



LJ 



o 

 ir 



UJ 

 Q. 



300 



— 2 00 



00 



930 



1935 



1940 



1945 



Figure 10. — Lake whitefish: Production (solid line), abundance (long dashes), and intensity of the fishery (short dashes) 

 in State of Michigan waters of Green Bay, 1929-49, as percentages of the 1929-43 mean. Production is also given in 

 pounds on scale at the left. 



2,703,000 pounds in 1939 was followed by two more 

 years in which the take exceeded 4 million pounds. 

 From a peak of 4,319,000 pounds in 1941 the catch 

 declined rapidly to the 21-year low of 1,379,000 

 pounds in 1944 only to rise in 4 years to the 21- 

 year high of 7,909,000 pounds in 1948. The output 

 was still high in 1949 (7,782,000 pounds) . 



The 1929^9 production statistics were charac- 

 terized by the tendency for first one and then 



another of the four principal species of fish to 

 dominate the catch. This dominance usually 

 lasted 2 to 4 years. Whitefish, for example, con- 

 tributed more than any other species to the catch 

 during the 4 years, 1929-32, and the 3 years, 1947- 

 49; the lake herring during the 4 years, 1936-39, 

 and the 2 years, 1945^16 ; and the smelt during the 

 4 years, 1940-43. The only examples of domi- 

 nance for a single year were provided by the lake 



