Table 2 Number of piglets born in total in first and second parity litter size by birth year of sow
From: Impact of litter size on sow stayability in Swedish commercial piglet producing herds
Birth year | Born in total, first parity | Born in total, second parity | ||||
|---|---|---|---|---|---|---|
N sows | Mean ± SD | Median (min–max) | N sows | Mean ± SD | Median (min–max) | |
1997 | 671 | 10.8 ± 2.4 | 11 (2–19) | 646 | 11.2 ± 3.0 | 11 (2–20) |
1998 | 1078 | 10.9 ± 2.6 | 11 (2–19) | 1002 | 11.3 ± 3.1 | 12 (2–19) |
1999 | 1233 | 11.4 ± 2.7 | 12 (1–23) | 1085 | 11.5 ± 3.1 | 12 (2-28) |
2000 | 1518 | 11.4 ± 3.0 | 12 (2–20) | 1310 | 11.9 ± 3.3 | 12 (2–23) |
2001 | 1887 | 11.5 ± 3.0 | 12 (1–23) | 1630 | 11.9 ± 3.4 | 12 (1–24) |
2002 | 3469 | 11.6 ± 3.0 | 12 (1–24) | 2987 | 12.3 ± 3.4 | 13 (1–26) |
2003 | 2689 | 12.1 ± 3.0 | 12 (1–28) | 2234 | 12.8 ± 3.4 | 13 (2–25) |
2004 | 3117 | 12.1 ± 2.8 | 12 (1–25) | 2545 | 12.8 ± 3.3 | 13 (1–23) |
2005 | 3266 | 12.1 ± 2.9 | 12 (1–23) | 2796 | 13.1 ± 3.3 | 13 (1–23) |
2006 | 5104 | 12.4 ± 3.0 | 13 (1–26) | 4086 | 13.1 ± 3.5 | 13 (1–24) |
2007 | 4688 | 12.7 ± 3.0 | 13 (1–24) | 3877 | 13.5 ± 3.5 | 14 (1–29) |
2008 | 4984 | 12.8 ± 3.1 | 13 (1–25) | 4141 | 13.6 ± 3.6 | 14 (1–24) |
2009 | 5174 | 13.0 ± 3.1 | 13 (1–25) | 4371 | 13.9 ± 3.6 | 14 (1–27) |
Total | 38,878 | 12.5 ± 3.1 | 13 (1–28) | 32,713 | 13.1 ± 3.6 | 13 (1–29) |