Vol. 24, No. 10 
Page k 
Table 3* Comparison of hatchability of prairie chicken eggs with population 
levels of pheasants in Jasper and Marion counties. 
Est. number 
Prairie chicken nests 3 - 
Year(s) 
of pheasant 
cocks in area 
Number 
of clutches 
Mean number of 
hatched eggs 
Percent 
hatchabi1ity 
JASPER COUNTY 
1263-63 
0-1 
37 
11.1 
93.3 
1969-73 
-4-3 
114 
10.7 
39.6 
1974-80 
14-26 
72 
2.6 
35.4 
1231 
43 
6 
9.5 
A 2.6 
MARION COUNTY 
1964-80 
0-1 
5 
11.4 
100.0 
1931 
1 
4 
10.3 
91.9 
—Including only incubated clutches for which the count of eggs was judged 
to be complete. 
Ecology and Management of V/hite-t ai led Deer - W-37~R C.H. Mixon, L.P. Hansen, 
J.E. Chelsvig, P.A. Brewer 
Spotlight censuses have been started at Allerton Park to estimate the fall 
deer population and to monitor population changes caused by the fall hunting 
season and by animals moving into or out of the Park. Censuses are conducted at 
2-week intervals from just before sunset through the first 2 hours of darkness. 
Two vehicles are used for a census, each following a standardized route. 
To date, only 2 censuses have been run. Visibility was limited by understory 
vegetation still present in the forest. Only adult and yearling females were 
counted because they are seen more frequently than the secretive adult males, 
and they are easier to identify. The number of adult and yearling females in 
the Park was estimated from the number of marked deer seen relative to the number 
of marked deer known to be in the Park and the number of unmarked deer seen. 
The first censuses each indicated that there are 43 adult and yearling 
females in Allerton Park, the adjoining 4-H Memorial Camp, and private land 
bordering the Park. Assuming 1.6 fawns per doe (from a 1975 Iowa study) and an 
approximate 50:50 ratio of bucks to does, the estimated number of deer is 12*}. 
