Table 3 GLM analysis of the effects of Regiella infection, antibiotic treatment, temperature and aphid density on the intrinsic rate of increase of S. avenae populations.

From: Infection pattern and negative effects of a facultative endosymbiont on its insect host are environment-dependent

Source

Type III Sum of Squares

df

F

P

Aphid genotype

0.001

1

2.833

0.093

Regiella infection (A)

0.009

1

27.264

<0.001

Antibiotic treatment (B)

0.051

1

151.965

<0.001

Temperature (C)

0.408

2

613.621

<0.001

Density (D)

0.541

2

814.102

<0.001

A × B

0.051

1

152.968

<0.001

A × C

0.006

2

8.540

<0.001

A × D

0.001

2

0.873

0.418

B × C

0.030

2

44.407

<0.001

B × D

0.001

2

1.700

0.183

C × D

0.008

4

6.131

<0.001

A × B × C

0.011

2

16.758

<0.001

A × B × D

0.002

2

2.444

0.087

A × C × D

0.006

4

4.152

0.002

B × C × D

0.005

4

4.053

0.003

A × B × C × D

0.004

4

2.780

0.026

  1. Aphid genotype was considered as a covariant factor. Regiella infection means whether the aphids were originally infected with Regiella or not. Antibiotic treatment means that the aphids were treated with antibiotics whether they originally carried Regiella or not.
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