WHITEFISH FISHERY OF LAKES HURON AND MICHIGAN 



393 



Table 60. — Annual fluctuations in the intensity of the whitefish fishery for all eight districts of Lake Michigan 

 combined (bottom of right half of table) and distribution of each year's intensity among the districts 



[The average annual intensity for the entire lake, 1929-1939, is 100.0. The value of one unit is 1/1,100 of the total expected 



catch of all districts, 1929-1939] 



Table 61. — Annual fluctuations in the abundance of whitefish in the various districts and areas of 



Lake Michigan, 19J+0-19J$ 



[Eipressed aa percentages of average 1929-1939 abundance. In the computation of percentages for areas of more than one district and for 

 the entire lake, the abundance percentage for each district was weighted according to the percentage of the total 1929-1939 production 



contributed by that district] 



Table 62. — Annual fluctuation in the catch of whitefish per unit of fishing effort of gill nets and pound nets 

 in the various districts of Lake Michigan, W40-1942 



Despite the markedly improved abundance of whitefish in the State of Michigan 

 waters of Lake Michigan in 1941 and 1942, fishing intensity was relatively low. For the 

 eight districts combined (table 60) the intensity, which was lower in 1940 (55.6 percent) 

 than in any year except 1936 (55.1 percent) of the period, 1929-1939, decreased even 

 further in 1941 (51.8 percent) and remained at about the same level (52.0 percent) in 

 1942. Among the individual districts (table 591 fishing intensity tended to be rela- 



