Table 2. Open in new tab Results of the...

Response variable	Factors	Values (mean ± SE)	df	Test statistic	P
(i) Male response
(a) Probability of investing sperm	Relatedness	R: 0.710 ± 0.083; U: 0.613 ± 0.089	1	0.993	0.319
	Relative dominance	H: 0.630 ± 0.095; L: 0.686 ± 0.080	1	0.225	0.635
	Relatedness: Relative dominance		1	0.263	0.608
(b) Amount of sperm invested	Relatedness	R: 2.14 ± 0.44; U: 1.29 ± 0.38	1	5.868	0.015
in 10⁸ of sperm	Relative dominance	H: 1.26 ± 0.29; L: 2.08 ± 0.46	1	0.587	0.444
(with aspermic attempts)	Relatedness: Relative dominance		1	0.095	0.758
(c) Amount of sperm invested	Relatedness	R: 2.32 ± 0.58; U: 1.43 ± 0.44	1	4.592	0.032
in 10⁸ of sperm	Relative dominance	H: 1.11 ± 0.33; L: 2.33 ± 0.53	1	0.767	0.381
(without aspermic attempts)	Relatedness: Relative dominance		1	1.567	0.211
(ii) Female response
(a) Probability of sperm ejection	Relatedness	R: 0.235 ± 0.106; U: 0.150 ± 0.082	1	0.604	0.437
	Relative dominance	H: 0.167 ± 0.078; L: 0.231 ± 0.122	1	0.391	0.532
	Relatedness: Relative dominance		1	0.285	0.593
(b) Proportion of semen ejected	Relatedness	R: 0.573 ± 0.128; U: 0.171 ± 0.030	1	12	0.057
	Relative dominance	H: 0.428 ± 0.124; L: 0.363 ± 0.219	1	8	0.629
(c) Number of hydrolysis points	Relatedness	R: 4.77 ± 1.10; U: 7.43 ± 2.35	1	0.649	0.426
	Relative dominance	H: 8.20 ± 2.45; L: 3.81 ± 0.59	1	0.454	0.500
	Relatedness: Relative dominance		1	0.454	0.500
	Relatedness: Lay date		1	3.605	0.058

Response variable

Factors

Values (mean ± SE)

Test statistic

(i) Male response

(a) Probability of investing sperm

Relatedness

R: 0.710 ± 0.083; U: 0.613 ± 0.089

0.993

0.319

Relative dominance

H: 0.630 ± 0.095; L: 0.686 ± 0.080

0.225

0.635

Relatedness: Relative dominance

0.263

0.608

(b) Amount of sperm invested

Relatedness

R: 2.14 ± 0.44; U: 1.29 ± 0.38

5.868

0.015

in 10⁸ of sperm

Relative dominance

H: 1.26 ± 0.29; L: 2.08 ± 0.46

0.587

0.444

(with aspermic attempts)

Relatedness: Relative dominance

0.095

0.758

Relatedness

R: 2.32 ± 0.58; U: 1.43 ± 0.44

4.592

0.032

in 10⁸ of sperm

Relative dominance

H: 1.11 ± 0.33; L: 2.33 ± 0.53

0.767

0.381

(without aspermic attempts)

Relatedness: Relative dominance

1.567

0.211

(ii) Female response

(a) Probability of sperm ejection

Relatedness

R: 0.235 ± 0.106; U: 0.150 ± 0.082

0.604

0.437

Relative dominance

H: 0.167 ± 0.078; L: 0.231 ± 0.122

0.391

0.532

Relatedness: Relative dominance

0.285

0.593

(b) Proportion of semen ejected

Relatedness

R: 0.573 ± 0.128; U: 0.171 ± 0.030

0.057

Relative dominance

H: 0.428 ± 0.124; L: 0.363 ± 0.219

0.629

Relatedness

R: 4.77 ± 1.10; U: 7.43 ± 2.35

0.649

0.426

Relative dominance

H: 8.20 ± 2.45; L: 3.81 ± 0.59

0.454

0.500

Relatedness: Relative dominance

0.454

0.500

Relatedness: Lay date

3.605

0.058

Response variable	Factors	Values (mean ± SE)	df	Test statistic	P
(i) Male response
(a) Probability of investing sperm	Relatedness	R: 0.710 ± 0.083; U: 0.613 ± 0.089	1	0.993	0.319
	Relative dominance	H: 0.630 ± 0.095; L: 0.686 ± 0.080	1	0.225	0.635
	Relatedness: Relative dominance		1	0.263	0.608
(b) Amount of sperm invested	Relatedness	R: 2.14 ± 0.44; U: 1.29 ± 0.38	1	5.868	0.015
in 10⁸ of sperm	Relative dominance	H: 1.26 ± 0.29; L: 2.08 ± 0.46	1	0.587	0.444
(with aspermic attempts)	Relatedness: Relative dominance		1	0.095	0.758
(c) Amount of sperm invested	Relatedness	R: 2.32 ± 0.58; U: 1.43 ± 0.44	1	4.592	0.032
in 10⁸ of sperm	Relative dominance	H: 1.11 ± 0.33; L: 2.33 ± 0.53	1	0.767	0.381
(without aspermic attempts)	Relatedness: Relative dominance		1	1.567	0.211
(ii) Female response
(a) Probability of sperm ejection	Relatedness	R: 0.235 ± 0.106; U: 0.150 ± 0.082	1	0.604	0.437
	Relative dominance	H: 0.167 ± 0.078; L: 0.231 ± 0.122	1	0.391	0.532
	Relatedness: Relative dominance		1	0.285	0.593
(b) Proportion of semen ejected	Relatedness	R: 0.573 ± 0.128; U: 0.171 ± 0.030	1	12	0.057
	Relative dominance	H: 0.428 ± 0.124; L: 0.363 ± 0.219	1	8	0.629
(c) Number of hydrolysis points	Relatedness	R: 4.77 ± 1.10; U: 7.43 ± 2.35	1	0.649	0.426
	Relative dominance	H: 8.20 ± 2.45; L: 3.81 ± 0.59	1	0.454	0.500
	Relatedness: Relative dominance		1	0.454	0.500
	Relatedness: Lay date		1	3.605	0.058

Table 2.

Open in new tab

Results of the postcopulatory experiments

Response variable	Factors	Values (mean ± SE)	df	Test statistic	P
(i) Male response
(a) Probability of investing sperm	Relatedness	R: 0.710 ± 0.083; U: 0.613 ± 0.089	1	0.993	0.319
	Relative dominance	H: 0.630 ± 0.095; L: 0.686 ± 0.080	1	0.225	0.635
	Relatedness: Relative dominance		1	0.263	0.608
(b) Amount of sperm invested	Relatedness	R: 2.14 ± 0.44; U: 1.29 ± 0.38	1	5.868	0.015
in 10⁸ of sperm	Relative dominance	H: 1.26 ± 0.29; L: 2.08 ± 0.46	1	0.587	0.444
(with aspermic attempts)	Relatedness: Relative dominance		1	0.095	0.758
(c) Amount of sperm invested	Relatedness	R: 2.32 ± 0.58; U: 1.43 ± 0.44	1	4.592	0.032
in 10⁸ of sperm	Relative dominance	H: 1.11 ± 0.33; L: 2.33 ± 0.53	1	0.767	0.381
(without aspermic attempts)	Relatedness: Relative dominance		1	1.567	0.211
(ii) Female response
(a) Probability of sperm ejection	Relatedness	R: 0.235 ± 0.106; U: 0.150 ± 0.082	1	0.604	0.437
	Relative dominance	H: 0.167 ± 0.078; L: 0.231 ± 0.122	1	0.391	0.532
	Relatedness: Relative dominance		1	0.285	0.593
(b) Proportion of semen ejected	Relatedness	R: 0.573 ± 0.128; U: 0.171 ± 0.030	1	12	0.057
	Relative dominance	H: 0.428 ± 0.124; L: 0.363 ± 0.219	1	8	0.629
(c) Number of hydrolysis points	Relatedness	R: 4.77 ± 1.10; U: 7.43 ± 2.35	1	0.649	0.426
	Relative dominance	H: 8.20 ± 2.45; L: 3.81 ± 0.59	1	0.454	0.500
	Relatedness: Relative dominance		1	0.454	0.500
	Relatedness: Lay date		1	3.605	0.058

Response variable	Factors	Values (mean ± SE)	df	Test statistic	P
(i) Male response
(a) Probability of investing sperm	Relatedness	R: 0.710 ± 0.083; U: 0.613 ± 0.089	1	0.993	0.319
	Relative dominance	H: 0.630 ± 0.095; L: 0.686 ± 0.080	1	0.225	0.635
	Relatedness: Relative dominance		1	0.263	0.608
(b) Amount of sperm invested	Relatedness	R: 2.14 ± 0.44; U: 1.29 ± 0.38	1	5.868	0.015
in 10⁸ of sperm	Relative dominance	H: 1.26 ± 0.29; L: 2.08 ± 0.46	1	0.587	0.444
(with aspermic attempts)	Relatedness: Relative dominance		1	0.095	0.758
(c) Amount of sperm invested	Relatedness	R: 2.32 ± 0.58; U: 1.43 ± 0.44	1	4.592	0.032
in 10⁸ of sperm	Relative dominance	H: 1.11 ± 0.33; L: 2.33 ± 0.53	1	0.767	0.381
(without aspermic attempts)	Relatedness: Relative dominance		1	1.567	0.211
(ii) Female response
(a) Probability of sperm ejection	Relatedness	R: 0.235 ± 0.106; U: 0.150 ± 0.082	1	0.604	0.437
	Relative dominance	H: 0.167 ± 0.078; L: 0.231 ± 0.122	1	0.391	0.532
	Relatedness: Relative dominance		1	0.285	0.593
(b) Proportion of semen ejected	Relatedness	R: 0.573 ± 0.128; U: 0.171 ± 0.030	1	12	0.057
	Relative dominance	H: 0.428 ± 0.124; L: 0.363 ± 0.219	1	8	0.629
(c) Number of hydrolysis points	Relatedness	R: 4.77 ± 1.10; U: 7.43 ± 2.35	1	0.649	0.426
	Relative dominance	H: 8.20 ± 2.45; L: 3.81 ± 0.59	1	0.454	0.500
	Relatedness: Relative dominance		1	0.454	0.500
	Relatedness: Lay date		1	3.605	0.058

R = related, U = unrelated male; H = higher, L = lower social status of the focal male compared to the first male to mate with the same female. Test statistic values are based on the χ²-distribution, except for aggression level of interruption, which is based on the Z-distribution and the proportion of semen ejected that is based on the Mann–Whitney U test statistic. P < 0.05 are highlighted in bold.

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