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Table 4 Selected best model for I. ricinus nymph infestation load on an individual bank vole with estimated coefficients (in log scale) explained by month (from May to October, with May as reference), sex (female as reference), presence of I. trianguliceps larvae and females and presence of I. ricinus larvae, centered body mass and its squared value. We defined site and individual nested in site as nested random structure

From: Temporal dynamics of the tick Ixodes ricinus in northern Europe: epidemiological implications

 

Estimate (SE)

z-value

P-value

Intercept

-2.994 (0.617)

-4.86

<0.005

June

-1.325 (0.385)

-3.44

<0.005

July

-1.360 (0.429)

-3.17

0.002

August

-2.103 (0.518)

-4.06

<0.005

September

-3.043 (0.643)

-4.73

<0.005

October

-2.956 (0.732)

-4.04

<0.005

Male

1.787 (0.298)

6.00

<0.005

Body mass

0.219 (0.036)

6.14

<0.005

Body mass2

-0.009 (0.003)

-2.80

0.005

Presence of I. trianguliceps larvae

0.709 (0.247)

2.87

0.004

Presence of I. trianguliceps female

1.012 (0.318)

3.18

0.002

Vole abundance

0.014 (0.006)

2.30

0.021

Random effects

   

 Site

σ2 = 0.75 (SD = 0.87)

 Individual nested in site

σ2 = 0.01 (SD = 0.09)

Negative binomial dispersion parameter

1.00 (SE = 0.46)

  1. σ2 is the variance attributable to random effect. Number of observations: Total = 1,007; Site = 4; Site:Individual = 658
  2. Abbreviations: SD standard deviation, SE standard error