1964] 
Roth — Reproduction in Cockroaches 
231 
Table 10 — Effect of nutrition and mating, following parturition, on oocyte 
development in N. cinerea that were starved during gestation 
Days with food 
after 
parturition^ 
Number used 
per cent 
ovipositing 
and 
Days to oviposit 
after 
parturition** 
N 
% 
0 
31 
6 
13.5 
± 
0.5 
0 
(M) 
23 
13 
16.0 
+ 
0.6 
j 
21 
10 
15.0 
± 
0.5 
1 
(M) 
6 
0 
2 
23 
22 
16.8 
± 
0.7 
2 
(M) 
49 
53 
16.1 
+ 
0.5 
3 
31 
39 
16.4 
+ 
1.3 
3 
(M) 
28 
61 
15.7 
+ 
0.5 
5 
25 
68 
17.1 
± 
0.6 
5 
(M) 
43 
63 
16.8 
+ 
0.6 
6 
24 
71 
15.4 
+ 
0.5 
8 
27 
74 
17.6 
± 
0.8 
10 
32 
91 
16.9 
± 
0.4 
12 
1 
62 
100 
17.3 
0.4 
12 + § 
215 
99 
15.5 
0.2 
12+ (M) § 
15 
100 
16.8 
± 
0.6 
Food was Purina lab chow. (M) — mated on the day food was 
removed; all other females were not mated again after parturition. 
** Time allowed for the females that were not fed after parturition was 
13-20 days (not mated) and 16-22 days (mated). All other groups 
were given 25 days to oviposit after parturition at which time females 
that did not oviposit were dissected and their oocytes were measured. 
§ Fed until oviposition. 
and 5 days (comparable to the mated groups) had oocytes 1.23 ± 
0.08 mm. long. The larger size of the oocytes in mated females that 
dropped their spermatophores is indicative of a higher concentration 
of corpus allatum hormone than that found in the females that 
failed to drop their spermatophores or in those that were not mated. 
The results show that when females are starved during gestation 
and not mated after parturition, exposure to food for at least 5 days 
is required for more than 60% of the individuals to oviposit. The 
stimulus afforded by mating has little or no effect on oocyte develop- 
ment if the females are starved continuously, or if given food for 
only 1 day after parturition ; the mating stimulus did increase the 
