Table 2 Full model summaries for P₂ and sperm features

GLMM

P₂:

Male ID

Intercept (competition +/+ vs +/+)

−1.47 [−2.39, -0.54]

−3.21

0.001

Paternity share 2^nd male

Male genotype combination (+/t vs +/t)

–

n/n

4.30 [2.55, 6.04]

4.99

< 0.001

Ejaculation number 1^st male – 2^nd male

0.3 (0.5)

n/n

−1.39 [−2.75, −0.04]

−2.08

0.038

Ejaculation interval 1^st to 2^nd male [h]

2.0 (0.9)

y/y

−1.39 [−2.12, −0.67]

−3.88

< 0.001

Weight difference 1^st male – 2^nd male

−1.3 (2.2)

y/y

0.22 [−0.42, 0.86]

0.70

0.484

Female genotype (28 +/+; 12 +/t)

–

y/n

1.33 [−0.03, 2.69]

1.96

0.048

LMM

PC1:

Brother pair/Male ID

Intercept (centred for genotype)

0.32 [0.15, 0.48]

–

–

Progressive sperm speed

Incubation time*Male ID

t haplotype

–

y/n

−0.35 [−0.66, −0.04]

4.44

0.048

Incubation time [h]

2.5 (2.0)

n/n

−0.05 [−0.07, −0.02]

9.80

0.005

Sperm count

71.3 (36.7)

y/y

−0.28 [−0.38, −0.17]

23.60

< 0.001

t haplotype*Time

–

–

0.01 [−0.05, 0.06]

0.04

0.850

t haplotype*Sperm count

–

–

0.05 [−0.08, 0.18]

0.43

0.517

Sperm count*Time

–

–

0.01 [−0.02, 0.03]

0.40

0.528

LMM

PC2:

Brother pair/Male ID

Intercept (centred for genotype)

0.27 [0.08, 0.47]

–

–

Sperm head speed

Incubation time*Male ID

t haplotype

–

y/n

0.12 [−0.18, 0.41]

0.53

0.476

Incubation time [h]

2.5 (2.0)

n/n

−0.10 [−0.13, −0.08]

48.10

< 0.001

Sperm count

71.3 (36.7)

y/y

−0.09 [−0.22, 0.03]

1.75

0.190

t haplotype*Time

–

–

−0.06 [−0.11, 0.003]

3.07

0.096

t haplotype*Sperm count

–

–

0.10 [−0.06, 0.27]

1.17

0.285

Sperm count*Time

–

–

0.005 [−0.03, 0.04]

0.06

0.809