Table 1 Phylogenetic generalised linear mixed models (PGLMM) testing the influence of parity mode and egg attendance on the occurrence of social grouping in squamate reptiles

From: Live bearing promotes the evolution of sociality in reptiles

 

Data set

Parameter

Estimate

Test statistic

Parity mode

 

Conservative (n = 324)

Intercept (β0)

−2.01 ± 0.96

Z = −2.09, P = 0.04

  

Parity mode (β1)

2.34 ± 0.42

Z = 5.59, P < 0.001

  

Citation count

<0.001 ± 0.001

Z = 0.27, P = 0.79

  

Signal in residuals (s2)

2.84

P < 0.001

  

Signal in response (s2)

4.19

P < 0.001

 

Relaxed (n = 1210)

Intercept (β0)

−3.25 ± 1.50

Z = −2.16, P = 0.03

  

Parity mode (β1)

2.82 ± 0.49

Z = 5.70, P < 0.001

  

Signal in residuals (s2)

7.28

P < 0.001

  

Signal in response (s2)

8.92

P < 0.001

Egg attendance (analyses restricted to oviparous species)

 

Conservative (n = 219)

Intercept (β0)

−1.61 ± 0.99

Z = 1.62, P = 0.11

  

Egg attendance (β1)

−0.83 ± 0.54

Z = −1.52, P = 0.13

  

Citation count

<0.001 ± 0.001

Z = −0.06, P = 0.95

  

Signal in residuals (s2)

2.66

P < 0.001

  

Signal in response (s2)

2.35

P < 0.001

 

Relaxed (n = 1049)

Intercept (β0)

−3.89 ± 1.51

Z = 2.58, P = 0.01

  

Egg attendance (β1)

1.04 ± 0.63

Z = 1.66, P = 0.10

  

Signal in residuals (s2)

7.07

P < 0.001

  

Signal in response (s2)

7.92

P < 0.001

  1. N equals the number of species included in each analysis Significant terms are shown in bold The ‘signal in response (s2)’ parameter is derived from a model fit with no predictor variables and provides an estimate of phylogenetic structure of social grouping from each data set. Model estimates are reported ± SE. For confidence intervals of parameter estimates, see Supplementary Table 4. For a details on the conservative and relaxed data set, see Methods
Back to article page