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Table 1 Number of offspring sired by male house mice

From: Baculum morphology predicts reproductive success of male house mice under sexual selection

Fixed effects

Coefficient (SE)

z-value

P-value

ΔAIC

Random effects

Variance (SD)

Model for total number of offspring sired

      

Intercept

−26.14 (5.42)

−4.83

<0.001

-

Sibling group

0.47 (0.69)

Body mass

4.52 (1.55)

2.91

0.004

-

Population

0.37 (0.61)

Testes mass

19.43 (6.50)

2.99

0.003

5.82

  

Seminal vesicles mass

8.53 (3.35)

2.54

0.011

3.71

  

Baculum shaft width

32.24 (5.32)

6.06

<0.001

45.04

  
  1. Generalized linear mixed model to investigate morphological traits influencing the reproductive success of male house mice, showing the best model for the total number of offspring sired. Data for morphological traits were log transformed prior to analysis. Body mass was retained in the model as a covariate. Population and sibling group were included as random effects (see text for further details). ΔAIC = the change in the AIC if the single term is dropped. Number of observations = 22, sibling groups = 11, populations = 4.