Vol. 7, No. 6 
Page 4 
Table 3» Quai1-trapping data from the Forbes, Dale, and Alma study areas, May 
19-June 19, 1964. Numbers in parentheses are hens. 
Forbes 
Dale 
A1 ma 
Al 1 Areas 
Qua i 1 Captured 
79(8) 
30(3) 
38(4) 
147(15) 
Quail Recaptured 
37 
1 1 
9 
57 
Total Recaptures 
61 
12 
11 
84 
Total Captures* 
179 
43 
56 
278 
Trap-Days (T.D.) 
152 
44 
87 
283 
T. D./Orig. Capture 
1 .92 
1 .47 
2.29 
1 .92 
T. D./Total Captures 
.85 
1 .02 
1 -55 
1 .02 
* Includes "repeats"- 
--birds taken 
more than once 
in the same trap 
during the same 
day. 
Erratum 
The formula on page 3 of the May 1964 Monthly Wildlife Research Letter 
should have read: 
R = r A , r A = j r , r E = _1_ 
f E N 2 >/£ 
The square root sign was inadvertently omitted. 
5. Rabbit Management W. R. Edwards, D. A. Casteel 
The study of population dynamics of cottontails on the 4-H and Sanctuary 
study areas, initiated in 1956 and 1957, respectively, was continued. Censuses 
indicated that rabbit numbers in the fall of 1 963 were about the same as they 
were in November of 1 96 2 and considerably lower than in the earlier years of 
the study. Similarly, the spring census of the two areas in March 1964 showed 
about the same density of cottontails as prevailed in March of the previous year. 
The population trends, plus the fact that the two areas have been hunted alter¬ 
nately in recent years, suggest that removal of up to 40 or 50 percent of the fall 
populations by hunting has had relatively little effect on population size. 
Correlation and regression analyses were used in an attempt to evaluate the 
relationships among characteristics of the rabbit populations on the study 
areas with annual patterns of temperature and precipitation. There was relatively 
little synchronization in annual changes in rabbit abundance between the 4-H 
and Sanctuary areas. The numbers of rabbits on the areas in spring did not 
depend on the numbers present the previous fall, nor were they strongly related 
to the numbers of rabbits killed by hunters. Also, the numbers of rabbits on 
study areas in the fall appeared largely independent of population levels in the 
spring. 
