Table 2.
Mean value of a herd characteristic per herd type
| Herd type | In-degree | Out-degree | In-strength | Out-strength | Herd size | Number of males purchased |
|---|---|---|---|---|---|---|
| D |
1.07 (0.30–1.20) |
1.92 (1.00–2.20) |
4.99 (0.45–4.65) |
15.79 (5.90–19.40) |
125.6 (72.0–153.9) |
0.52 (0.10–0.70) |
| DnR-C |
1.18 (0.70–1.40) |
2.37 (1.10–2.80) |
22.29 (8.55–27.6) |
43.05 (19.30–54.00) |
167.5 (99.5–204.7) |
0.87 (0.30–1.20) |
| DnR-nC |
2.90 (0.90–2.70) |
1.59 (1.00–1.80) |
15.08 (3.40–14.43) |
15.71 (4.28–15.45) |
77.4 (41.2–88.8) |
0.40 (0.10–0.50) |
| DRm |
1.41 (0.30–1.30) |
1.44 (0.50–1.60) |
5.58 (0.60–4.70) |
9.75 (2.30–12.40) |
118.9 (73.1–146.7) |
0.70 (0.20–1.00) |
| M |
1.40 (0.50–1.60) |
1.03 (0.50–1.30) |
4.78 (1.00–5.80) |
5.82 (1.80–7.70) |
79.3 (47.1–100.0) |
0.49 (0.10–0.60) |
| SdR |
2.45 (1.58–3.33) |
1.35 (1.18–1.53) |
77.20 (53.70–100.70) |
82.60 (52.45–112.75) |
62.3 (58.6–66.0) |
0.15 (0.08–0.23) |
| Overall |
1.27 (0.40–1.40) |
1.62 (0.80–1.90) |
6.37 (0.70–6.20) |
13.74 (3.70–16.30) |
113.3 (62.9–139.3) |
0.56 (0.10–0.80) |
The 25% and 75% quantile values are in parentheses. Herd types are typical dairy (D), dairy no rearing—contract (DnR-C), dairy no rearing—no contract (DnR-nC), dairy also rearing male calves (DRm), mixed (M), and herds that rear dairy females (SdR) (defined in Table 1).