Vo 1. 16, No. 3 
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rate (3.18 squirrels harvested per hunter trip) was attained during the August 
15-September 11 period. The highest rate of success in 1971 (3*^3 squirrels per 
trip) occurred during October 16-31, when seed crops had fallen from the trees 
and squirrels were foraging on the ground. 
Our sample of 93 cooperating avid squirrel hunters in the Southern Conservation 
Zone went squirrel hunting a total of 1,247 times--representing approximately 
3,296.5 man-hours of recreation--during the hunting season of 1972. Hunting 
pressure was highest during the first 2 weeks of the season (August 1-14), when 
our cooperators spent 908.75 man-hours in the field--representing 27*6 percent of 
their total hours afield for the entire 14-week season, about the same proportion 
as in 1971* In 1972 , hunting pressure remained high during the last 2 weeks of 
August, in contrast to 1971; when hunting pressure declined sharply during that 
period. During the period August 29-September 11, hunting pressure declined to 
17.4 percent of total hours afield and continued its slow decline throughout the 
remainder of the season. There was no increase in hunting pressure during October 
1972, as there had been in 1971* Hunting pressure was low, less than 10 percent 
of total hours afield, after September 11. 
Responses of Bobwhites to Habitat Manipulation J. A. Ellis 
To determine the effects of the extended quail hunting season in 1972-73; 
the harvest data were separated into a November-December segment and a January 
segment. On Forbes, an average of 3*2 gun-hours were spent to locate a covey 
in November-December, compared with an average of 7*4 gun-hours in January. An 
average of 4.5 gun-hours were required for each kill in the November-December 
segment, compared with an average of 7*8 gun-hours per kill in January. The 
kill per hunter trip averaged 0.8 quail during November^December end 0.5 quail 
in January. 
On the Dale Area, the average number of gun-hours required to locate a 
covey was 2.7 in November-December and 2.1 in January. To record a kill, the 
average number of gun-hours required was 3*6 during November-December and 3*0 
in January. The kill per hunter trip averaged 1.0 quail in November-December 
and 0.6 quail in January. 
Responses of Prairie Chickens to Habitat Manipulation R. L. Westemeier, 
D. R. Vance 
During the period 1963-72 at Bogota, the distances from 319 prairie chicken 
nests to the estimated centers of the nearest booming grounds have ranged from 
72 yards to 1,700 yards, with respective mean, mode, and median distances of 327 
+ 10 (SE) yards, about 235 yards, and about 285 yards. Only 3 nests (0.9 percent) 
were less than 100 yards from a booming ground and only 45 nests (14.1 percent) 
were more than 449 yards from a booming ground. Thus, 85*9 percent of the nests 
found at Bogota have been within about 0.25 mile from the center of the nearest 
booming ground. For six nests found farther than 0.5 mile from a booming ground, 
it is possible that one or two undetected cocks boomed in the vicinity of the 
