392 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



Table 58. — Production of whitefish in pounds in the State of Michigan waters of Lake Michigan, 1940-1948 



to 73 percent of the 1929-1939 average in the individual districts and 63 percent for the 

 8 districts combined — table 61) improved in every district in 1941. This general im- 

 provement was reflected in a rise in the abundance percentage from 63 to 91 for the lake 

 as a whole. Further increases in 1942 in M-2, M-3, and M-8 more than compensated 

 for declines in the remaining districts and carried the abundance percentage for all dis- 

 tricts combined to the still higher level of 95. The abundance of whitefish was above 

 the 1929-1939 average in three districts (M-4, M-6, and M-7) in 1941 and in five 

 districts (M-2, M-3, M-4, M-7, and M-8) in 1942. Conspicuous among the percent- 

 ages are the high value of 257 in M-6 in 1941 and the low figures of 45 and 34 in M-5 

 in 1941 and 1942. M-5 was the only district with abundance below 85 in 1941 or below 

 76 in 1942. 



Table 59. — Annual fluctuations in the intensity of the fishery for whitefish in each district of 



Lake Michigan, 1940-1943 

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



