Table 12.-- Correlation (r) between 1929-19^3 fluctuations in 

 abundance of chubs and of three other species in the 

 statistical districts of State of Michigan waters 

 of Lake Michigar 



[Absolute values of r corresponding to 1-, 5-> 

 and 10-percent levels of probability are 

 0,0*1, 0.51U, and 0.¥H] 



1/ Estimates of fluctuations in abundance of lake herring in 

 M-6, M-7, and M-8 were based on the pooled data for the 

 three districts . The one set of abundance indices obtained 

 was correlated separately with the chub indices for each of 

 the three districts. 



31 



