week percentage web building 
28 
Psyche 
[March-June 
The FG males had a higher rate of building while they grew 
than did the SG males (set I: T = 6, P = 0.05; set II: T = 6, 
P — 0.01 ) . The differences in the rate of building appear clearly 
on the graphs (Figs. 3 and 5) obtained by plotting the mean fre- 
quency of building per week for each group in each set. 
The frequency of building is strongly correlated with the amount 
of food eaten per day (Kendall rank coefficient; set I: 7 — 0.59, 
P = 0.004; set II: 7 — 0.52, P = 0.005). This is the necessary 
consequence of the feeding schedule. We might suppose that this 
relation occurs in nature. A fresh snare probably increases the 
chances of capturing prey. 
F G males 
'f?j set 1 
F G males 
[ l 1 
- 1 1 
1 1 
1 1 
1 1 
f 1 1 
1 1 I". 
1 1 1 1 
r •. ; ; ; . 
r j— J - J ; 
.... j 
— 1 • : 
•••••• 
..... 
• ...... . .r"* 
! . 
8 12 16 20 24 
weeks post hatching 
Figure 3. Frequency of building of the FG and SG males of set I. 
Dashed line: weekly mean of frequency of building for the four FG males. 
Dotted line: weekly mean of frequency of building for the seven SG males. 
Note the similarity in the pattern between weight increase and web building 
frequency. (Compare with Fig. 2.) 
