102 



Troy A. Ladine and Angela Ladine 



Table 1 . Description of selected habitat variables measured at 30 sites with cap- 

 tures of Peromyscus leucopus occurred and 3 1 sites with no captures of P. leu- 

 copus for a study in western Tennessee. 



Habitat variables Description 



COVER0 Percent green vegetation at ground level 



COVER 1 Percent green vegetation at 1 m height 



COVER2 Percent green vegetation at 2 m height 



STEMS0-5 Number of vertical woody stems with diameter <5 cm 



STEMS5-10 Number of vertical woody stems with diameter 5-10 cm 



STEMS 10- 15 Number of vertical woody stems with diameter 10-15 cm 



STEMS>15 Number of vertical woody stems with diameter >15 cm 



LOGS0-5 Number of horizontal woody stems on the ground with 



diameter of <5 cm 

 LOGS5-10m Number of horizontal woody stems on the ground with 



diameter 5-10 cm 

 LOGS 10- 15 Number of horizontal woody stems on the ground with 



diameter 10-15 cm 

 LOGS>15 Number of logs at ground level with diameter >15 cm 



LITTER Mean of seven leaf litter depths taken for each scale 



The existence of potential patterns at each scale was examined with 

 principal components analysis. Discriminate function analysis was used to fur- 

 ther examine the difference between sites with captures and sites where no cap- 

 tures occurred. Initial discriminating variables were selected with stepwise selec- 

 tion discriminate analysis and an initial entry level of significance of P = 0.15. 

 Variables were removed or added to check the selection of variables from the 

 stepwise selection procedure for improvement of the discriminating capabilities 

 of the variables. No addition or subtraction improved the classification for any 

 scale. 



RESULTS 

 Thirty-one Peromyscus leucopus were captured 55 times at 30 trap 

 sites. Population size was estimated at 32 mice (range = 26 - 38) with a mean 

 density of 18.5 mice per hectare. Other species, Tamias striatus (n = 1), Mari- 

 na carolinensis (n = 2), Glaucomys volans, (n = 7) were captured at eight addi- 

 tional sites. No P. leucopus were captured at trap sites where captures of other 

 species occurred. 



