Table 10. -Value and year of lowest and highest abundance 

 indices for chubs in the State of Michigan waters of 

 Lake Michigan, 1929-1953, and ratios 

 of the extreme indices 



Table 11. — Correlation (r) between fluctuations in abundance of chubs 



in the statistical districts of the State of Michigan waters 



of Lake Michigan, I929-I9U3 



[Absolute values of r corresponding to 1-, 5-> an cL 10-percent levels 

 of probability are 0.61+1, O.51U, and 0.V+1] 



29 



