Table 1 Descriptive statistics of the datasets in the reference scenario full and the five alternative scenarios

Number of animals

123,567

118,147

122,974

81,825

115,869

123,567

Number of sires

676

676

676

669

675

676

Number of dams

12,293

12,249

12,288

11,678

12,226

12,293

Number of litters

16,681

16,613

16,674

15,739

16,587

16,681

Number of groups

11,111

11,111

11,111

7473

10,387

11,111

% males

41.3

41.2

41.3

39.0

42.0

41.3

% male groups

40.1

40.1

40.1

38.0

40.9

40.1

Group size; mean (min–max)

11.6 (8–15)

11.1 (2–15)

11.5 (5–15)

11.4 (8–15)

11.6 (8–15)

11.6 (8–15)

Space allowance (\(m^{2} /pig\)); mean (min–max)

0.88 (0.76–1.00)

0.92 (0.76–6.10)

0.89 (0.76–1.83)

0.89 (0.76–1.00)

0.88 (0.76–1.00)

0.88 (0.76–1.00)

% pigs without phenotype (or culled)

4.4

0

3.9

0

3.1

0

% groups with missing phenotypes (or culled)

32.7

0

29.7

0

28.1

0

% pigs culled

3.2

0

1.2

0

0.9

0

% groups with culled pigs

24.8

0

9.4

0

8.3

0

Additive genetic relationship within pens; mean (min–max)

0.17 (0.07–0.55)

0.17 (0.07–0.55)

0.17 (0.07–0.55)

0.17 (0.07–0.49)

0.17 (0.07–0.55)

0.17 (0.07–0.55)

ADG; mean g/d ± sd (min–max)

1017 ± 126 (377–1698)

1017 ± 126 (377–1698)

1017 ± 126 (377–1698)

1020 ± 124 (382–1698)

1017 ± 126 (377–1698)

1017 ± 125 (377–1698)

\(twg_{ij}\): proportion of time that pigs spent with each other within groups; mean (min–max)

0.987 (0.476–1.000)

N/A

0.991 (0.476–1.000)

N/A

0.992 (0.870–1.000)

0.987 (0.476–1.000)

\(sbg_{grp}\): relative space allowance among groups; mean (min–max)

1.011 (0.239–1.204)

N/A

1.012 (0.239–1.204)

N/A

1.025 (0.802–1.204)

1.011 (0.239–1.204)

\(twsbg_{ij}\): the product of \(twg_{ij}\) and \(sbg_{grp}\); mean (min–max)

0.999 (0.114–1.204)

N/A

1.004 (0.114–1.204)

N/A

1.017 (0.720–1.204)

0.999 (0.114–1.204)