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Table 4 Pairwise comparisons of reproductive parameters for different categories of males

From: Measurements of hybrid fertility and a test of mate preference for two house mouse races with massive chromosomal divergence

Response variable

 

CHBU-CHHN

F1-CHHN

BC.23-CHHN

BC.24-CHHN

BC.23-F1

Number of sperm in cauda epididymis (103)

Estimate

−2549.9

na*

na*

−456.8

na*

SE

1666.1

na*

na*

1626.5

na*

df

26.6

na*

na*

27.4

na*

t

−1.42

na*

na*

−0.27

na*

p-value

0.29

na*

na*

0.94

na*

Testis mass in mg

Estimate

−4.89

−57.09

−63.64

0.26

−6.55

SE

3.03

2.60

5.36

3.16

5.26

df

71.4

67.1

100.7

68.3

101.0

t

−1.61

−21.92

−11.87

0.08

−1.24

p-value

0.32

< 10−4

< 10−4

1.00

0.53

Epididymis mass in mg

Estimate

−1.49

−11.21

−11.21

0.98

0.00

SE

1.09

0.94

1.88

1.13

1.85

df

68.8

62.8

99.5

64.6

99.9

t

−1.36

−11.97

−5.96

0.86

0.00

p-value

0.46

< 10−4

< 10−4

0.77

1.00

Mass of seminal vesicle with coagulating gland in mg

Estimate

−14.11

−7.01

4.92

2.11

11.93

SE

5.64

4.85

9.88

5.88

9.70

df

69.4

64.9

100.4

66.4

100.8

t

−2.50

−1.45

0.50

0.36

1.23

p-value

0.05

0.41

0.93

0.97

0.54

Preputial gland mass in mg

Estimate

−1.07

10.99

−8.52

6.00

−19.51

SE

6.50

5.52

12.57

6.69

12.35

df

70.5

66.8

101.9

65.7

101.8

t

−0.16

1.99

−0.68

0.90

−1.58

p-value

1.00

0.16

0.86

0.75

0.33

  1. Pairwise comparisons of least square means of male categories using Dunnett’s method for p value adjustment were applied to the LMMs with male category and male body mass as explanatory variables, and the ID of the males’ parents as a random effect. Estimate and standard error of sperm number were transformed back before insertion into the table. *For number of sperm, only fertile male categories were included in the model (see text)