Table 1 Lifetime performance and reproductive performance of sows in 143 herds
Measurements | n | Mean | SEM | Median (Interquartile range) |
|---|---|---|---|---|
Age at first-mating | 147,194 | 254 | 0.11 | 249 (234–273) |
Longevity | ||||
Number of parity at removal | 147,194 | 4.90 | 0.01 | 5 (2–7) |
Sow life days | 147,194 | 1088 | 0.92 | 1138 (829–1346) |
Herd-life days | 147,194 | 834 | 0.92 | 882 (575–1096) |
Prolificacy | ||||
Herd-life piglets born alive | 135,865 | 68.3 | 0.09 | 71 (42–93) |
Herd-life piglets weaned | 135,865 | 59.9 | 0.08 | 64 (38–81) |
Fertility | ||||
Herd-life non-productive days | 135,865 | 72.0 | 0.15 | 56 (33–98) |
Reproductive efficiency | ||||
Herd-life annualized piglets weaned | 135,865 | 25.5 | 0.02 | 25 (23–28) |
Sow life annualized piglet weaned | 135,865 | 18.3 | 0.02 | 20 (15–22) |