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Table 4 Analyses (ANCOVAs) of the mean numbers of water mites in 2003 and 2004 and for the mean number of gregarines in 2004 in Coenagrion puella males and females (coded as colour class). In all three analyses body size was accounted for by using head width as a covariate.

From: Immune function and parasite resistance in male and polymorphic female Coenagrion puella

Year and parasite

source

df

F

P

2003, water mites

'colour class'

3

0.605

0.612

 

population

1

12.201

0.001

 

'colour class' × population

3

1.886

0.682

 

head width

1

8.397

0.004

2004, water mites

'colour class'

3

2.261

0.082

 

head width

1

11.428

0.001

2004, gregarines

'colour class'

3

0.419

0.740

 

head width

1

0.024

0.877