Table 1 Reproductive data for female pigs in 98 Spanish herds
From: Culling in served females and farrowed sows at consecutive parities in Spanish pig herds
Measurements | Range | |||
|---|---|---|---|---|
N | Mean ± SEM | Minimum | Maximum | |
Lifetime records | ||||
Parity at removal | 94,691 | 4.6 ± 0.01 | 0 | 13 |
Parity at culling | 80,845 | 4.7 ± 0.01 | 0 | 13 |
Annualized culling rate, % | 94,691 | 44.4 ± 0.08 | – | – |
Percentage of culled females, % | 94,691 | 85.4 ± 0.11 | – | – |
Gilt age at first-servicea, days old | 87,814 | 251.7 ± 0.15 | 160 | 400 |
Parity records | ||||
Served parity | 465,947 | 2.6 ± 0.01 | 0 | 12 |
Farrowed parity | 431,644 | 3.6 ± 0.01 | 1 | 13 |
Number of pigs born aliveb | 371,252 | 12.1 ± 0.01 | 0 | 25 |
Number of stillborn pigletsb | 371,224 | 0.9 ± 0.01 | 0 | 19 |
Lactation length, daysb | 369,665 | 23.4 ± 0.01 | 0 | 41 |
Weaning-to-first-service interval, daysb | 367,502 | 5.9 ± 0.01 | 0 | 35 |