Table 1 Reproductive data for female pigs in 98 commercial herds from 2008 to 2013
Range | ||||
|---|---|---|---|---|
Measurements | N | Mean ± SEM | Minimum | Maximum |
Lifetime records | ||||
Parity at removal | 93,604 | 4.6 ± 0.01 | 0 | 13 |
Gilt age at first-mating, days olda | 86,837 | 251.6 ± 0.15 | 160 | 400 |
Number of lifetime pigs born alive | 86,749 | 58.7 ± 0.11 | 0 | 202 |
Lifetime non-productive days of female pigs | 93,604 | 84.9 ± 0.16 | 0 | 289 |
Female life days | 88,972 | 942.8 ± 1.26 | 28 | 1703 |
SRB females, % | 93,604 | 1.2 ± 0.03 | – | – |
Parity records | ||||
Parity at service | 454,058 | 2.6 ± 0.01 | 0 | 12 |
Records with two returns or more, % | 454,058 | 1.37 ± 0.01 | – | – |
SRB risk for first served females, % | 454,058 | 0.26 ± 0.01 | – | – |
Number of pigs born alive | 360,454 | 12.1 ± 0.01 | 0 | 25 |
Number of stillborn piglets | 360,454 | 0.9 ± 0.01 | 0 | 19 |
Lactation length, days | 360,454 | 23.4 ± 0.01 | 10 | 41 |
Weaning-to-first-mating interval, days | 360,454 | 5.8 ± 0.01 | 0 | 35 |
Service records | ||||
Number of services | 501,855 | 1.1 ± 0.01 | 1 | 9 |
Re-service intervals for RB females, days | 4258 | 30.8 ± 0.31 | 11 | 145 |