Aphid reproductive investment in response to mortality risks

Table 1 Statistical results from experiments 1a and 1b: fecundity in response to bacterial exposure.

	Day 1 offspring			Total offspring (Day 2-6)
1a: aphid line by bacterial exposure	d.f.	F	P	d.f.	F	P
Line	3,228	10.15	< 0.0001	3,176	10.90	< 0.0001
Exposure	2,228	1.11	0.3300	2,176	3.00	0.0522
Line*Exp	6,228	0.78	0.5900	6,176	0.18	0.9819
	Day 1 offspring			Total offspring (Day 2-6)
1b: symbiont by bacterial exposure	d.f.	F	P	d.f.	F	P
symbiont	3,219	9.94	< 0.0001	3,155	14.65	< 0.0001
Exposure	2,219	1.80	0.1700	2,155	7.84	0.0006
Symb*Exp	6,219	1.31	0.2500	6,155	1.15	0.3348

ANOVA statistics of fecundity data for experiments where aphids from different clonal lines (1a: 5A, G3, G6, LSR1) or with different secondary symbionts (1b: no symbiont, Hamiltonella defensa, Regiella insecticola, Serratia symbiotica) were challenged with heat-killed bacteria, a sterile stab, or were handled as a control.

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