1983] 
Gordon — Pogonomyrmex badius 
419 
Table 2. (continued). 
By Colony 
18 14 16 
13 
F 
Mean 
Difference 
F 
Mean 
Differen 
203.8** 
-1.65 
106.9** 
-1.1 
0.3 
0.04 
7.9** 
0.15 
6.1** 
0.18 
13.5** 
0.27 
422.9** 
2.05 
68.8** 
0.89 
152.9** 
2.07 
86.6** 
1.55 
1 17.9** 
-1.74 
17.9** 
-0.69 
75.1** 
1.86 
152.7** 
2.02 
18.1** 
-0.49 
1.1 
-0.14 
12.9** 
0.39 
1.6 
0.16 
22.7** 
0.31 
29.1** 
0.36 
40.9** 
0.63 
1 1.6** 
0.35 
40.3** 
-0.63 
15.9** 
-0.36 
1.3 
0.05 
19.8** 
0.26 
1.7 
0.20 
1.8 
-0.07 
0.5 
0.05 
0.04 
0.01 
3.5 
0.08 
2.0 
0.06 
13.9** 
0.23 
51.9** 
0.25 
13.4** 
-0.24 
20.8** 
-0.18 
1.6 
-0.08 
16.9** 
-0.22 
2.4 
-0.10 
12.1** 
-0.15 
23.9** 
0.26 
3.3 
0.10 
14.6** 
0.26 
17.9** 
0.26 
F 
Mean 
Difference 
F 
Mean 
Difference 
65.2** 
-0.96 
1 13.7** 
-1.22 
49.3** 
-0.44 
0.2 
-0.04 
8.1** 
0.19 
4.1# 
0.16 
42.8** 
0.73 
89.3** 
1.13 
25.5** 
0.89 
67.1** 
1.22 
60.5** 
-1.52 
101.8** 
-1.51 
717.5** 
3.05 
152.4** 
3.28 
1.2 
-0.09 
0.04 
-0.03 
0.1 
0.02 
0.9 
0.10 
13.3** 
0.18 
2.4 
0.14 
10.6** 
0.27 
1 14.1** 
1.10 
23.1** 
-0.39 
121.5** 
- 1 .03 
3.8 
0.10 
0.3 
0.04 
3.2 
-0.07 
0.3 
-0.04 
0.3 
0.02 
0.4 
0.04 
0.3 
0.02 
2.1 
0.09 
46.1** 
0.29 
2.2 
0.09 
22.3** 
-0.21 
10.5** 
-0.21 
4.7* 
-0.15 
0.4 
-0.05 
1.2 
-0.07 
3.5 
-0.16 
4.1# 
0.08 
2.2 
0.10 
12.1** 
0.21 
0.7 
0.05 
laboratory conditions of the present study, temperatures never 
became that high. Time of food availability has also been suggested 
as a factor regulating activity rhythms of foraging ants (Hansen 
1978, Hunt 1974, Levieux 1979a and 1979b, Levieux and Diomande 
1978a and 1978b), and, in fact, all four study colonies foraged pri- 
marily at the time of peak food availability. 
However, fluctuations of temperature and of food availability 
may not account completely for the activity rhythms observed here. 
For example, the results show that rates of change in the numbers of 
ants in each activity vary with the time of day. This means that ants 
doing different tasks respond differently to environmental cues such 
