344 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



Fiquhe 20.— Eighth district, M 



Table 19. — Annual fluctuations in the intensity of the fishery for whitefish in each district of Lake Michigan 



[Expressed as percentages of the average 1929-1939 intensity in the district] 



Table 20. — Annual fluctuations in the intensity of the whitefish fishery for all eight districts of Lake Michigan 

 combined (third row from bottom) and distribution of each year's intensity among the districts 



[The average annual intensity for the entire lake, 1929-1939, is 100.0. In parentheses are the intensity values of the deep-trap-net fishery. 

 The value of one unit is 1/1100 of the total expected catch (p. 314) of all districts, 1929-1939] 



1 Intensity represented by deep-trap-net operations in M-7 in 1934 was 2.9. 



