Vol. 24, No. 1 
Page 3 
We examined the impact of intensive cull -tree mlno is. In 
on 4 areas on the Kaskaskia ^ per '™" an average of 54 cult trees and other 
2 mixed-hardwood stands total.ng 25 was ’ removed . in 2 comparable stands totaling 
trees of no commercial value pe Qf nQ commercia l value were removed. 
37 acres, no cull trees or e of 30 trees from each area. V/e 
Periodic selection cuts had ' f t 9 ree cav ities between treatments 
practtced^some t4« c^ta^ngTaOities ^ou.d be retained for wildlife use. 
For gray sguirrels. we believe that mention of^^trees^lth^suitable 
cavities per acre 15 square spredominate, perhaps as few as 1-3 
cull-tree removal. Uhere fox squ P should a i ways be retained to 
Li’r« present and future cavity 
formation. 
We used 2 200-acre study areas inc^Jlear-cutting.^Four'additional small 
postcutting) response of gray squ.rre old were used to determine 
clear-cuts 7-9, 15-17 (2 acres) and ^ ^ V^ S Q , ", ear - cuts UP to 22 years old. 
squirrel presence and s ^' r ^ ^ r% gnd est i ma ted densities declined 44% 
Captures of gray squirrels decline 5 acres of a 206-acre forest, 
in the 1st year following w hose home ranges included the clear- 
Recovery rates for tagged adu <1 exposed to clear-cutting. Fewer than 
cut were lower than rates for a clear-cut were captured 
20% of the adults known to be iving J smaller, narrower clear-cuts (20 
within the cut area. In a companion study ot 2 sma. • flcmt changes , n 
acres and 9 acres) on a 1 a-acre ar rates, movements, or body weights 
squirrel densities, recovery rates, breeding rates,^ ?? 15> and 20 
were observed after clear cutting. farther into the clear-cuts during 
years old, squirrels ventured significantly farther^ less (F > < 0.001) 
winter than after leaf-out. c l ear Sauirrels using clear-cuts <22 years old 
food for squirrels than uncut forests. Squ.rre 9 foraged signif i cant ly 
a 7 “ year " o,d clear ~ cut - 
In considering a size limitation «n cl~r ^aielTr^Te 
the home range of the adult female a g clear-cuts narrower than 500 feet 
should' a How retain sor* potion of their original home range. 
The length of narrow ciear-cuts 
topography, logging constraints, or e°" recommenc | retention of uncut travel 
zones. If cutting units exceed *.0 * squ irrels and other wildlife 
lanes of mature tr * es ’ T ^°® r ^f lanes’would be required for about 30 years 
after°cut 1 1 ng f t^atlow'tree^wtthin ciear-cuts to reach seed-producing age. 
