Skip to main content

Table 1 Selected best model for the abundance of tick questing in the vegetation with estimated coefficients (in log scale), explained by vole abundance, month (May taken as reference) and year (2012 as reference)

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

Y = Larva abundance

Estimate (SE)

z-value

P-value

Intercept

-1.424 (0.667)

-2.13

0.033

June

1.891 (0.742)

2.55

0.011

July

0.003 (0.778)

0.00

0.997

August

-1.100 (0.974)

-1.13

0.259

September

-0.987 (1.035)

-0.95

0.340

October

-1.707 (0.979)

-1.74

0.081

Vole abundance

0.028 (0.013)

2.14

0.032

Random effect: site

σ2 = 0.46 (SD = 0.68)

Negative binomial dispersion parameter

0.38 (SE = 0.07)

Y = Nymph abundance

Estimate (SE)

z-value

P-value

Intercept

0.193 (0.375)

0.52

0.607

June

-0.401 (0.275)

-1.46

0.145

July

-1.571 (0.313)

-5.02

<0.005

August

-1.312 (0.351)

-3.74

<0.005

September

-0.628 (0.390)

-1.61

0.107

October

-2.730 (0.404)

-6.76

<0.005

Vole abundance

0.013 (0.004)

2.99

0.003

Random effect: site

σ2 = 0.38 (SD = 0.62)

Negative binomial dispersion parameter

2.88 (SE = 0.70)

Y = Adult (male + female) abundance

Estimate (SE)

z-value

P-value

Intercept

-0.766 (0.393)

-1.95

0.051

June

-0.203 (0.226)

-0.90

0.368

July

-0.600 (0.238)

-2.52

0.012

August

0.395 (0.215)

1.84

0.066

September

0.279 (0.214)

1.30

0.192

October

-1.082 (0.292)

-3.71

<0.005

2013

0.288 (0.196)

1.47

0.142

2014

0.306 (0.202)

1.51

0.131

2015

0.923 (0.191)

4.82

<0.005

Random effect: site

σ2 = 0.39 (SD = 0.63)

Negative binomial dispersion parameter

7.48 (SE = 2.81)

Y = Female + Nymph abundance

Estimate (SE)

z-value

P-value

Intercept

0.514 (0.350)

1.47

0.142

June

-0.422 (0.227)

-1.86

0.063

July

-1.509 (0.258)

-5.84

<0.005

August

-1.021 (0.282)

-3.62

<0.005

September

-0.599 (0.324)

-1.85

0.064

October

-2.430 (0.323)

-7.53

<0.005

Vole abundance

0.012 (0.004)

3.04

0.002

Random effect: site

σ2 = 0.37 (SD = 0.60)

Negative binomial dispersion parameter

4.42 (SE = 1.10)

  1. σ2 is the variance attributable to random effect. Number of observations: Total = 88; Site = 4
  2. Abbreviations: SD standard deviation, SE standard error