1 = Arcsin conversion used for data transformation 



2 = Square root conversion used for data transformation 



2 



1 = summer (July 1976) 



2 = fall (November 1976) 



3 = winter (February 1977) 



4 = spring (April 1977) 



5 = north side 



6 = south side 



7 = east side 



8 = west side 



3 



Maximum value of density (transformed) 



4 

 Minimum value of density (transformed) 



Variance 



Standard deviation 



7 

 N = number of quadrats examined over zone of occurrence 



o 



F = "F ratio" (ratio of variances) 



9 

 t = "Student's t," the deviation of the estimated mean from that of 



the sample population 



S = Significant (95 percent confidence level) 



NS = Not significant (95 percent confidence level) 



(S) = Significant difference in means due to absence during at least 

 one season 



