Table 1. Number of movements, pigs moved and kilometres covered between pig holdings, gathering areas, markets and slaughterhouses over the 5-year study period (2009–2013) in England and Wales.
| Types of movements | Number of movements |
Number of pigs moved |
Distance (km) |
|||
|---|---|---|---|---|---|---|
| Total | Proportion (%) | Total | Proportion (%) | Median (Q1–Q3) | Max | |
| Pig holding | ||||||
| Small - Small | 6,935 | 3.7 | 24,869 | 0.0 | 19 (8–45) | 725 |
| Small – Medium | 1,617 | 0.8 | 5,517 | 0.0 | 16 (9–23) | 165 |
| Small – Large | 64,887 | 34.9 | 295,231 | 1.1 | 16 (7–36) | 720 |
| Medium - Small | 699 | 0.4 | 4,109 | 0.0 | 20 (9–42) | 433 |
| Medium - Medium | 490 | 0.2 | 7,527 | 0.0 | 20 (11–26) | 118 |
| Medium - Large | 17,908 | 9.6 | 666,003 | 2.4 | 25 (11–51) | 727 |
| Large – Small | 18 | 0.0 | 2,030 | 0.0 | 176 (162–233) | 357 |
| Large - Medium | 1,082 | 0.6 | 38,034 | 0.2 | 47 (25–85) | 517 |
| Large – Large | 92,435 | 49.7 | 26,234,194 | 96.2 | 41 (16–88) | 646 |
| Gathering area | ||||||
| Small - Gathering | 34,043 | 36.7 | 256,426 | 23.1 | 31 (18–50) | 518 |
| Medium - Gathering | 16,555 | 17.8 | 194,208 | 17.5 | 30 (19–52) | 497 |
| Large - Gathering | 18,953 | 20.4 | 449,840 | 40.6 | 27 (15–43) | 452 |
| Gathering - Small | 915 | 1.0 | 5,734 | 0.5 | 32 (20–50) | 627 |
| Gathering - Medium | 30 | 0.0 | 449 | 0.0 | 11 (11–68) | 114 |
| Gathering - Large | 22,222 | 24.0 | 202,346 | 18.2 | 35 (20–57) | 499 |
| Market | ||||||
| Small - Market | 44 | 5.6 | 311 | 0.5 | 19 (9–34) | 450 |
| Medium - Market | 19 | 2.4 | 403 | 0.6 | 11 (11–11) | 27 |
| Large - Market | 463 | 58.4 | 32,392 | 51.3 | 11 (11–11) | 85 |
| Market - Small | 5 | 0.6 | 55 | 0.0 | 72 (37–90) | 187 |
| Market - Medium | 1 | 0.1 | 2 | 0.0 | 41 (41–41) | 41 |
| Market - Large | 261 | 32.9 | 29,946 | 47.5 | 1 (1–12) | 192 |
| Slaughterhouse | ||||||
| Small -aughterhouse | 195,131 | 32.1 | 699,109 | 2.0 | 19 (11–31) | 767 |
| Medium -Slaughterhouse | 96,089 | 15.8 | 1,772,878 | 5.0 | 24 (13–43) | 723 |
| Large -Slaughterhouse | 304,795 | 50.2 | 32,318,300 | 91.5 | 57 (27–75) | 721 |
| Gathering area -Slaughterhouse | 10,935 | 1.8 | 520,664 | 1.4 | 58 (23–253) | 715 |
| Market -Slaughterhouse | 123 | 0.0 | 14,499 | 0.0 | 10 (10–10) | 110 |
Pig holdings were classified into three size categories as “small” (less than 500 pigs), “medium” (between 500–5,000 pigs) and “large” (more than 5,000 pigs).